DCI (Delhi Chapter of ISHRAE)Indian Society of Heating Refrigerating & Air Conditioning Engineers

Vol. VI Issue 4, Edition: March 2015, Editor: Aneesh Kadyan, Co-editor: Vikram Maini

Improving your Comfort through

Efficient Insulation

by Delhi Chapter of ISHRAEI SHARE

www.facebook.com/pages/ISHRAE-Delhi-Chapterwww.facebook.com/pages/ISHRAE-Delhi-Chapter

Presidential Address New Committee 2015-16DCI

Mr. Jagdeep Singh(President )

Company: Genesis Eco Tech Pvt. Ltd.Email : jcims@rediffmail.com

•Mob: +919810134084

Mr. V.B. Lal(Treasurer)

Company: DEFT ConsultantEmail: vblal@hotmail.com

Mob: +919818187757

Mr. Abid Hussain(IMM Past President )

Company: Abid Husain ConsultantsEmail : abid@ahcon.inMob: +91 9810045859

Mr. Aneesh Kadyan(President Elect)

Company: CBREEmail: aneeshkadyan@yahoo.com

Mob: +919811999631

Mr. Gaurav Vasudev(Secretary)

Company: Sevcon LtiEmail: gauravvasudev.gv@gmail.com

Mob: +919871166133

Mr. Pradeep Dua (CWC Member)

Company: DCS SALES & ENGINEERSEmail: duapradeepkumar@gmail.com

Mob: +919910034135

Mr. Ankur Goyal (CWC Member)

Company: aB3S Solutions Pvt. Ltd.Email: ankur183@gmail.com

Mob: +91 9818200463

Mr. Ajay Raj(CWC Member)

Company: A 2 S Consulting EngineersEmail: ajayraj69@gmail.com

Mob: +91 9871233910

Mr. Subir Das(CWC Member)

Company: Flowtech Air (P) Ltd.Email: fta@flowtechair.com

Mob: +91 9818004868

Mr. Saurabh Goel(CWC Member)

Company: AEON Consultants LLPEmail : saurabh.goyel@aeonconsultants.in

Mob: +919717093442

Mr. Ashwani Jain(CWC Member)

Company: Manage AirProducts (I) Pvt. Limited,

Email: mapro@airflowindia.netMob: +91 9811168264

Mr. Sandeep Kohli(CWC Member)

Company: Manage Air Products (I) Pvt. Limited,

Email: sandeep.kohli@vtsgroup.comMob: +91 9871830003

Mr. Pankaj Saxena(CWC Member)

Company: RUSKIN TITUS INDIAEmail: iaqindia@gmail.com

Mob: +91 9810606199

Mr. Sanjeev Malhotra(CWC Member)Company: Aecom

Email: sanjeev.malhotra@aecom.comMob: +919810552013

Mr. Manish Bhatia(CWC Member)

Company: Avant Garde Healthcare Engg. Solution Pvt. Ltd.

Email: manish.bhatia@ahespl.inMob: +91 9811791074

Guaranteed performance

even in themost radical of atmospheres

ACRECONF 2015Two days international conference

ACRECONF-2015 was successfully

organiged by Delhi Chapter of

ISHRAE on 20th & 21st March 2015 at

India Habitat Centre, New Delhi. This

year the theme of event was “360

Degree View on Emerging Mega

Trends in Built Environment ".

The event was beautifully spread for

two days with 5 parallel technical

sessions with eminent speakers from India and abroad.

It was an ideal forum for participants from all over the country to interact; this green capital offers you an exciting package of

awe-inspiring monuments, attractive shopping destinations and great cuisines from all over the world. More than 1100

delegates from all over the country witness this mega even.

Dear Members, Consolidate : We need to excite our

existing members of the value of ISHRAE Warm Greetings !and ensure they continue with us for

This is my first report to all and with the new president comes the lifetime. Hence, special focus will be laid

new Newsletter. Needless to say that change is the only on reaching out to our current members

permanent thing in the world. The twitter has moved on ! Delhi and seeing that they continue to see

Chapter of ISHRAE will from now on will be sharing on “I Share” value in this wonderful Institution.

instead of “Twitter”. The “I” in the “I Share” share not only Ease of Reach : Many members in NCR represents “ISHRAE” but “you and I”. The new editor Aneesh really felt it difficult to participate in Kadyan is a very gifted person and I am sure will do full justice to ISHRAE activities as the time of travel from Gurgaon, Manesar, the publication.Noida, Ghaziabad is tiresome and tough. Hence, it was

DCI CWC was installed during the Acreconf by none other than imperative that if members could not reach DCI, DCI would reach

Dr P C Jain which was a very hearty and proud moment for us. out to them. Hence, we saw the creation of Gurgaon sub chapter

We want to ensure that the good work done by the previous and with this we believe that Members from Gurgaon, Manesar,

president and current RD Mr Abid Hussain is carried on and Bhiwadi, Dharuheda, etc. will benefit. We are also looking at the

taken to new heights.possibility of making Noida sub chapter at the end of this society

The key objectives earmarked by this year’s CWC is in line with year for the same purpose.what our National President Mr Ramchandran directed. The key

We have a wonderful CWC representing a wide range of the focus areas are as follows :

member profile. From designers, contractors, manufacturer, end • Go back to roots. user, faculty, sales all are a part of the team. The following are • Share Technical heads of the committees in the body:• Consolidate our members - Renewals and sustenance Mr. Sandeep Kohli - Membership Promotion, Mr. Ankur Goyal - • Ease of reach Marketing, Mr. Sanjeev Malhotra - Programs, Mr. Subir Das -

Go back to roots : We will approach all the MEP engineers in Student Activity, Mr. Manish Bhatia - Advocacy, Mr. Aneesh

factories, plants, equipment service, construction sites, Kadyan - DCI Newsletter, Mr. Jagdeep Singh, Mr. Pankaj Saxena

maintenance, etc. which are spread all around the country side - Honors & Awards, Mr. Ashwani Jain - Finance, Mr. Pradeep Dua

and small cities and towns. Our focus was too much on large and - Website, Mr. Saurabh Goel - K-12 Activity

main cities and we forgot about these real roots of MEP Also in the team are presidents of the sub chapters namely:implementation. We were seeing a biased share of members

Mr. Rajeev Mehra - Agra Sub-Chapter, Mr. Sudhanshu Gupta - from marketing and sales fields and less of these hardcore users.

Dehradun Sub-Chapter, Mr. Sandeep Saxena - Lucknow Sub-We will get back to them and increase their share in membership.

Chapter, Mr. Jagesh Kumar - Meerut Sub-Chapter, Mr. P.K. Goel Share Technical : We will holding workshops which will be - Gurgaon Sub-Chapterfocussed on the following Industries – Hospitality, Healthcare,

This issue of I Share is based on the theme “Improving your Pharma, Food, Manufacturing, Automobiles, Mixed use,

comfort with efficient Insulation” which broadly covers Education, Government, Airports, etc. Each workshop will be

Condensation control – The main task of low-temperature focussed on particular industry where engineers with same back

insulation.background will share their concerns and achievements. It will

Best regards,have a panel of experts from the Industry and will have some

presentations on the relevant technology for the Industry. It will Jagdeep Singh, President (2015 -16)

have an open session involving the entire group.

UL Listed in accordance with Power ventilators for smoke control systems400ºC/ 30 mins, 300ºC/ 120 mins, 250ºC/ 120 mins

www.facebook.com/pages/ISHRAE-Delhi-Chapterwww.facebook.com/pages/ISHRAE-Delhi-Chapter

Presidential Address New Committee 2015-16DCI

Mr. Jagdeep Singh(President )

Company: Genesis Eco Tech Pvt. Ltd.Email : jcims@rediffmail.com

•Mob: +919810134084

Mr. V.B. Lal(Treasurer)

Company: DEFT ConsultantEmail: vblal@hotmail.com

Mob: +919818187757

Mr. Abid Hussain(IMM Past President )

Company: Abid Husain ConsultantsEmail : abid@ahcon.inMob: +91 9810045859

Mr. Aneesh Kadyan(President Elect)

Company: CBREEmail: aneeshkadyan@yahoo.com

Mob: +919811999631

Mr. Gaurav Vasudev(Secretary)

Company: Sevcon LtiEmail: gauravvasudev.gv@gmail.com

Mob: +919871166133

Mr. Pradeep Dua (CWC Member)

Company: DCS SALES & ENGINEERSEmail: duapradeepkumar@gmail.com

Mob: +919910034135

Mr. Ankur Goyal (CWC Member)

Company: aB3S Solutions Pvt. Ltd.Email: ankur183@gmail.com

Mob: +91 9818200463

Mr. Ajay Raj(CWC Member)

Company: A 2 S Consulting EngineersEmail: ajayraj69@gmail.com

Mob: +91 9871233910

Mr. Subir Das(CWC Member)

Company: Flowtech Air (P) Ltd.Email: fta@flowtechair.com

Mob: +91 9818004868

Mr. Saurabh Goel(CWC Member)

Company: AEON Consultants LLPEmail : saurabh.goyel@aeonconsultants.in

Mob: +919717093442

Mr. Ashwani Jain(CWC Member)

Company: Manage AirProducts (I) Pvt. Limited,

Email: mapro@airflowindia.netMob: +91 9811168264

Mr. Sandeep Kohli(CWC Member)

Company: Manage Air Products (I) Pvt. Limited,

Email: sandeep.kohli@vtsgroup.comMob: +91 9871830003

Mr. Pankaj Saxena(CWC Member)

Company: RUSKIN TITUS INDIAEmail: iaqindia@gmail.com

Mob: +91 9810606199

Mr. Sanjeev Malhotra(CWC Member)Company: Aecom

Email: sanjeev.malhotra@aecom.comMob: +919810552013

Mr. Manish Bhatia(CWC Member)

Company: Avant Garde Healthcare Engg. Solution Pvt. Ltd.

Email: manish.bhatia@ahespl.inMob: +91 9811791074

Guaranteed performance

even in themost radical of atmospheres

ACRECONF 2015Two days international conference

ACRECONF-2015 was successfully

organiged by Delhi Chapter of

ISHRAE on 20th & 21st March 2015 at

India Habitat Centre, New Delhi. This

year the theme of event was “360

Degree View on Emerging Mega

Trends in Built Environment ".

The event was beautifully spread for

two days with 5 parallel technical

sessions with eminent speakers from India and abroad.

It was an ideal forum for participants from all over the country to interact; this green capital offers you an exciting package of

awe-inspiring monuments, attractive shopping destinations and great cuisines from all over the world. More than 1100

delegates from all over the country witness this mega even.

Dear Members, Consolidate : We need to excite our

existing members of the value of ISHRAE Warm Greetings !and ensure they continue with us for

This is my first report to all and with the new president comes the lifetime. Hence, special focus will be laid

new Newsletter. Needless to say that change is the only on reaching out to our current members

permanent thing in the world. The twitter has moved on ! Delhi and seeing that they continue to see

Chapter of ISHRAE will from now on will be sharing on “I Share” value in this wonderful Institution.

instead of “Twitter”. The “I” in the “I Share” share not only Ease of Reach : Many members in NCR represents “ISHRAE” but “you and I”. The new editor Aneesh really felt it difficult to participate in Kadyan is a very gifted person and I am sure will do full justice to ISHRAE activities as the time of travel from Gurgaon, Manesar, the publication.Noida, Ghaziabad is tiresome and tough. Hence, it was

DCI CWC was installed during the Acreconf by none other than imperative that if members could not reach DCI, DCI would reach

Dr P C Jain which was a very hearty and proud moment for us. out to them. Hence, we saw the creation of Gurgaon sub chapter

We want to ensure that the good work done by the previous and with this we believe that Members from Gurgaon, Manesar,

president and current RD Mr Abid Hussain is carried on and Bhiwadi, Dharuheda, etc. will benefit. We are also looking at the

taken to new heights.possibility of making Noida sub chapter at the end of this society

The key objectives earmarked by this year’s CWC is in line with year for the same purpose.what our National President Mr Ramchandran directed. The key

We have a wonderful CWC representing a wide range of the focus areas are as follows :

member profile. From designers, contractors, manufacturer, end • Go back to roots. user, faculty, sales all are a part of the team. The following are • Share Technical heads of the committees in the body:• Consolidate our members - Renewals and sustenance Mr. Sandeep Kohli - Membership Promotion, Mr. Ankur Goyal - • Ease of reach Marketing, Mr. Sanjeev Malhotra - Programs, Mr. Subir Das -

Go back to roots : We will approach all the MEP engineers in Student Activity, Mr. Manish Bhatia - Advocacy, Mr. Aneesh

factories, plants, equipment service, construction sites, Kadyan - DCI Newsletter, Mr. Jagdeep Singh, Mr. Pankaj Saxena

maintenance, etc. which are spread all around the country side - Honors & Awards, Mr. Ashwani Jain - Finance, Mr. Pradeep Dua

and small cities and towns. Our focus was too much on large and - Website, Mr. Saurabh Goel - K-12 Activity

main cities and we forgot about these real roots of MEP Also in the team are presidents of the sub chapters namely:implementation. We were seeing a biased share of members

Mr. Rajeev Mehra - Agra Sub-Chapter, Mr. Sudhanshu Gupta - from marketing and sales fields and less of these hardcore users.

Dehradun Sub-Chapter, Mr. Sandeep Saxena - Lucknow Sub-We will get back to them and increase their share in membership.

Chapter, Mr. Jagesh Kumar - Meerut Sub-Chapter, Mr. P.K. Goel Share Technical : We will holding workshops which will be - Gurgaon Sub-Chapterfocussed on the following Industries – Hospitality, Healthcare,

This issue of I Share is based on the theme “Improving your Pharma, Food, Manufacturing, Automobiles, Mixed use,

comfort with efficient Insulation” which broadly covers Education, Government, Airports, etc. Each workshop will be

Condensation control – The main task of low-temperature focussed on particular industry where engineers with same back

insulation.background will share their concerns and achievements. It will

Best regards,have a panel of experts from the Industry and will have some

presentations on the relevant technology for the Industry. It will Jagdeep Singh, President (2015 -16)

have an open session involving the entire group.

UL Listed in accordance with Power ventilators for smoke control systems400ºC/ 30 mins, 300ºC/ 120 mins, 250ºC/ 120 mins

www.facebook.com/pages/ISHRAE-Delhi-Chapter

DCI CWC Installation - 2015-16

The new CWC of Delhi Chapter of ISHRAE successfully installed on 20th March.2015 at India Habitat Centre alongwith the installa-

tion of National BOG. The oath to the new team was given by Hon’ble Dr. P.C. Jan. About 150 members of DCI alongwith past

presidents of ISHRAE grace the occasion with their presence. The ceremony was followed by networking dinner alongwith beautiful

Lazer show organiged by Kiloskar Brothers.

URJAVARAN'15 Meerut was clubbed with DL program held at Grand5 - The luxury resort at Meerut on 07.02.2015 where

more than 130 ladies & gentlemen attended the event. Mr. Gautham Baliga delivered a very nice lecture on infection control

methods in air conditioning of healthcare facilities. Under Urjavaran'15 - Mr. Summit Vasan from K-Flex & Mr. N. Kumaresan

from Blue Star spoke in the pre lunch session. Mr. Ashish Jain from AECOM & Mr. Barun Agarwal from Breathe Easy spoke in

post lunch session. All present stayed back upto closing ceremony and remarked very very knowledgeable and a wonderful

event first of its kind in Meerut. News Paper "Dainik Jagran" having largest circulation in India covered the event

Urjavaran Meerut

www.facebook.com/pages/ISHRAE-Delhi-Chapter

DCI CWC Installation - 2015-16

The new CWC of Delhi Chapter of ISHRAE successfully installed on 20th March.2015 at India Habitat Centre alongwith the installa-

tion of National BOG. The oath to the new team was given by Hon’ble Dr. P.C. Jan. About 150 members of DCI alongwith past

presidents of ISHRAE grace the occasion with their presence. The ceremony was followed by networking dinner alongwith beautiful

Lazer show organiged by Kiloskar Brothers.

URJAVARAN'15 Meerut was clubbed with DL program held at Grand5 - The luxury resort at Meerut on 07.02.2015 where

more than 130 ladies & gentlemen attended the event. Mr. Gautham Baliga delivered a very nice lecture on infection control

methods in air conditioning of healthcare facilities. Under Urjavaran'15 - Mr. Summit Vasan from K-Flex & Mr. N. Kumaresan

from Blue Star spoke in the pre lunch session. Mr. Ashish Jain from AECOM & Mr. Barun Agarwal from Breathe Easy spoke in

post lunch session. All present stayed back upto closing ceremony and remarked very very knowledgeable and a wonderful

event first of its kind in Meerut. News Paper "Dainik Jagran" having largest circulation in India covered the event

Urjavaran Meerut

www.facebook.com/pages/ISHRAE-Delhi-Chapter

Lecture Program held at DCRUST

Ishrae Meerut Sub Chapter successfully installs one student chapter at MIET, Meerut on 14.03.2015. Mr. M.K. Gupta –

President Meerut, Mr. Dhiraj Rastogi-Zonal Chair-Students Activities & Mr. V.C. Rajpal – Chair student activity were present

during the installation ceremony. Mr. M.K. Gupta gives oath to the new team and handed over the charter to Chairman - MIET. A

set of ISHRAE – Publications was presented to Director for the study of students.

Student Chapter Installation

Lecture Program DCRUST Student

Chapter: Delhi Chapter of ISHRAE

successfully organized one lecture

program at one of the active Student

Chapter, Deen Bandhu Choutu

Ram University on 18th March

2015. The lecture was given by Mr.

Kapil Singhal on “Refrigerants-

Past, Present & Future”. It was a

very successful lecture program

which was attended by more than 100 students. After the lecture there was a Q/A session in which students ask various

questions on various aspects of Refrigerants. Entire faculty members including HOD Dr. Raj Kumar and Executive Secretary,

DCI Mr. Vikram Maini was also present during the entire lecture program.

One DL Program at Meerut Sub

Chapter was success fu l l y

organised on 28.03.2015 at IIA

Auditorium Meerut. It has been a

nice presentation by Mr. Kapil

Singhal. Student members and

faculty advisers from 5 student

chapters attended the program

which has been a very knowledge-

able and interactive.

DL Program at Meerut

www.facebook.com/pages/ISHRAE-Delhi-Chapter

Lecture Program held at DCRUST

Ishrae Meerut Sub Chapter successfully installs one student chapter at MIET, Meerut on 14.03.2015. Mr. M.K. Gupta –

President Meerut, Mr. Dhiraj Rastogi-Zonal Chair-Students Activities & Mr. V.C. Rajpal – Chair student activity were present

during the installation ceremony. Mr. M.K. Gupta gives oath to the new team and handed over the charter to Chairman - MIET. A

set of ISHRAE – Publications was presented to Director for the study of students.

Student Chapter Installation

Lecture Program DCRUST Student

Chapter: Delhi Chapter of ISHRAE

successfully organized one lecture

program at one of the active Student

Chapter, Deen Bandhu Choutu

Ram University on 18th March

2015. The lecture was given by Mr.

Kapil Singhal on “Refrigerants-

Past, Present & Future”. It was a

very successful lecture program

which was attended by more than 100 students. After the lecture there was a Q/A session in which students ask various

questions on various aspects of Refrigerants. Entire faculty members including HOD Dr. Raj Kumar and Executive Secretary,

DCI Mr. Vikram Maini was also present during the entire lecture program.

One DL Program at Meerut Sub

Chapter was success fu l l y

organised on 28.03.2015 at IIA

Auditorium Meerut. It has been a

nice presentation by Mr. Kapil

Singhal. Student members and

faculty advisers from 5 student

chapters attended the program

which has been a very knowledge-

able and interactive.

DL Program at Meerut

www.facebook.com/pages/ISHRAE-Delhi-Chapter

Condensation control – The main task of low-temperature insulation

Why condensation occurs: air cannot absorb an infinite Figure 2: The temperature must not fall below the dew point

amount of water vapour

Only correctly dimensioned insulation thicknesses provide

optimal protection against condensation

Figure 1: Air cannot absorb an infinite amount of water vapour

The influencing factors

The ambient conditions

The temperature must not fall below the dew point

In order to prevent condensation it must be ensured that the

The air contains water in its gaseous state. At a given temperature surface temperature on the insulation is always at least as high as

and with a given relative humidity, the air contains a defined or higher than the dew point temperature under defined ambient

amount of water vapour. If air is cooled down, it will be 100 % conditions.

saturated with water vapour at a certain temperature. This

temperature is known as the dew point. If the air were cooled

further, some of the water could no longer be held in the form of To calculate the surface temperature or the insulation thickness invisible water vapour but would turn into liquid droplets. So warm needed to ensure that the surface temperature is at least as high as air can absorb more water vapour than cold air (Figure 1).the dew point, not only the line temperature but also the ambient

conditions – ambient temperature and relative humidity – must be

The respective water vapour content of the air can simply be taken known or defined as expected maximum values as part of the

directly from tables provided in typical specialist literature. These planning process. In addition, it is necessary to determine the

show to what extent air of a certain relative humidity can cool thermal conductivity of the insulation material, the object

without the relative humidity of 100 % being exceeded and thus (pipe/duct, etc.) to be insulated and the heat transfer coefficient of

condensation forming. the surface of the insulation.

Normally air only contains a certain percentage of the maximum These formulae are probably well-known. However, it is crucial to

possible moisture. It is expressed as relative humidity and can be know how the individual factors influence the dimensioning of the

defined in two ways: insulation and its future serviceability.

1. as one hundred times the value of the ratio of the existing

moisture content to the maximum possible moisture content.

2. as one hundred times the value of the ratio of the water vapour In order to determine the minimum insulation thicknesses for low-

partial pressure and the saturation pressure. temperature insulation, assumptions must be made about typical

ambient conditions. The maximum values listed in Table 1 were

given by insulators, specifiers and plant operators. They reflect the

conditions typically used when dimensioning low-temperature

insulation.

Table 1: Typical ambient conditions for low-temperature insulation

Applying this physical law to insulation in refrigeration applications

means that the insulation thickness must be designed so that

temperatures are never lower than the dew point anywhere on the

surface of the insulation material. In the example in Figure 2, the

insulation thickness must be at least 11 mm in order to prevent

condensation forming (ambient temperature 22° C, line tempera-

ture 6° C, relative humidity 80 %, pipe outer diameter 33.7 mm). In A common mistake is to underestimate the impact of the relative

practice, it is seldom possible to obtain a product with exactly the humidity on the insulation thickness needed to prevent condensa-

insulation thickness calculated. Therefore, the next largest tion. For example, in some areas a 10 per cent increase in humidity

insulation thickness is usually selected.can mean that the insulation needs to be twice as thick.

Whereas hot installations (heating and hot-water pipes, for example) are mainly insulated to save energy, cold systems

(such as the chilled-water pipes of air-conditioning systems or the suction lines of commercial freezers) also need protec-

tion against condensation. On refrigeration systems, i.e. in applications where the line temperature is lower than the

ambient temperature, water vapour can condense on the cold surface. Condensation on building equipment can result in

considerable costs. Apart from the expense of repairing the damage, there may also be costs due to wet ceilings, spoilt

goods or disruptions to production processes. Moreover, as the insulation effect of a material deteriorates greatly when it

becomes damp, energy losses may rise dramatically and the risk of corrosion also increases sharply. Condensation

control must therefore be the primary aim of any low-temperature insulation.

Parameters influencing the insulation thickness

by Dipl.-Ing. (FH) Michaela Störkmann, Armacell Manager Technical Department EMEA (Europe, Middle East & Africa)

Sub Chapter Installations

www.facebook.com/pages/ISHRAE-Delhi-Chapter

maximum ambient maximum relative

temperature [°C] humidity [%]

Plant rooms 32 75

Pipe shafts/pipe ducts

- ‘dry’ 24 22

- ‘damp’ 65 85

Cellar corridors 22 85

Ceiling cavities 24 65

(suspended ceilings)

Rooms in offices, 28 70

schools and hospitals

Underground car parks

- badly ventilated 22 85

- ventilated 26 89

Food manufacturing 20 90

DEHRADUN

Meerut Sub-Chapter of ISHRAE was successfully installed

on 4th April 2015 at 7 Eleven Hotel Meerut. More than 70

members participate in the installation ceremony. The oath

to the new team was given by Mr. Jagdeep Singh, DCI

President. Mr. Abid Husain-R.D. North 1, Mr. V.B. Lal,

Treasurer DCI, Mr. M.K. Gupta, IPP, Mr. Ashok Goel

Meerut Past President & Mr. Vikram Maini, Executive

Secretary DCI were also present during the entire

ceremony.

MEERUT

Lucknow Sub-Chapter installation ceremony was

successfully conducted on 11th April 2015 Hotel Sarovar in

the presence of 35 members. The oath to the new team

was given by Mr. Abid Husain, R.D. North 1. President

Elect DCI, Mr. Aneesh Kadyan, Student Activity Chair, Mr.

Subir Das, DCI CWC Member, Mr. Pradeep Dua,

Executive Secretary DCI Mr. Vikram Maini were present

also present during the ceremony. Most of the past

presidents of Lucknow Sub-Chapter of ISHRAE were also

present during the installation ceremony.

LUCKNOW

Agra Sub-Chapter of ISHRAE was installed on 8th April

2015 at Hotel Puspvilla in the presence of more than 50

members. Before the installation members share their

views with the President DCI, Mr. Jagdeep Singh & Mr.

Abid Husain, R.D. North 1 for improvement in membership

promotion and organizing technical events in the chapter.

Later in the evening the new team was installed by DCI

President Mr. Jagdeep Singh. Mr. B.D. Rishi-Zonal Chair

Programs, Mr. Ashwani Sharma, IPP & Mr. Vikram Maini,

Executive Secretary DCI were present during the entire

event.

AGRA

GURGAON

www.facebook.com/pages/ISHRAE-Delhi-Chapter

Condensation control – The main task of low-temperature insulation

Why condensation occurs: air cannot absorb an infinite Figure 2: The temperature must not fall below the dew point

amount of water vapour

Only correctly dimensioned insulation thicknesses provide

optimal protection against condensation

Figure 1: Air cannot absorb an infinite amount of water vapour

The influencing factors

The ambient conditions

The temperature must not fall below the dew point

In order to prevent condensation it must be ensured that the

The air contains water in its gaseous state. At a given temperature surface temperature on the insulation is always at least as high as

and with a given relative humidity, the air contains a defined or higher than the dew point temperature under defined ambient

amount of water vapour. If air is cooled down, it will be 100 % conditions.

saturated with water vapour at a certain temperature. This

temperature is known as the dew point. If the air were cooled

further, some of the water could no longer be held in the form of To calculate the surface temperature or the insulation thickness invisible water vapour but would turn into liquid droplets. So warm needed to ensure that the surface temperature is at least as high as air can absorb more water vapour than cold air (Figure 1).the dew point, not only the line temperature but also the ambient

conditions – ambient temperature and relative humidity – must be

The respective water vapour content of the air can simply be taken known or defined as expected maximum values as part of the

directly from tables provided in typical specialist literature. These planning process. In addition, it is necessary to determine the

show to what extent air of a certain relative humidity can cool thermal conductivity of the insulation material, the object

without the relative humidity of 100 % being exceeded and thus (pipe/duct, etc.) to be insulated and the heat transfer coefficient of

condensation forming. the surface of the insulation.

Normally air only contains a certain percentage of the maximum These formulae are probably well-known. However, it is crucial to

possible moisture. It is expressed as relative humidity and can be know how the individual factors influence the dimensioning of the

defined in two ways: insulation and its future serviceability.

1. as one hundred times the value of the ratio of the existing

moisture content to the maximum possible moisture content.

2. as one hundred times the value of the ratio of the water vapour In order to determine the minimum insulation thicknesses for low-

partial pressure and the saturation pressure. temperature insulation, assumptions must be made about typical

ambient conditions. The maximum values listed in Table 1 were

given by insulators, specifiers and plant operators. They reflect the

conditions typically used when dimensioning low-temperature

insulation.

Table 1: Typical ambient conditions for low-temperature insulation

Applying this physical law to insulation in refrigeration applications

means that the insulation thickness must be designed so that

temperatures are never lower than the dew point anywhere on the

surface of the insulation material. In the example in Figure 2, the

insulation thickness must be at least 11 mm in order to prevent

condensation forming (ambient temperature 22° C, line tempera-

ture 6° C, relative humidity 80 %, pipe outer diameter 33.7 mm). In A common mistake is to underestimate the impact of the relative

practice, it is seldom possible to obtain a product with exactly the humidity on the insulation thickness needed to prevent condensa-

insulation thickness calculated. Therefore, the next largest tion. For example, in some areas a 10 per cent increase in humidity

insulation thickness is usually selected.can mean that the insulation needs to be twice as thick.

Whereas hot installations (heating and hot-water pipes, for example) are mainly insulated to save energy, cold systems

(such as the chilled-water pipes of air-conditioning systems or the suction lines of commercial freezers) also need protec-

tion against condensation. On refrigeration systems, i.e. in applications where the line temperature is lower than the

ambient temperature, water vapour can condense on the cold surface. Condensation on building equipment can result in

considerable costs. Apart from the expense of repairing the damage, there may also be costs due to wet ceilings, spoilt

goods or disruptions to production processes. Moreover, as the insulation effect of a material deteriorates greatly when it

becomes damp, energy losses may rise dramatically and the risk of corrosion also increases sharply. Condensation

control must therefore be the primary aim of any low-temperature insulation.

Parameters influencing the insulation thickness

by Dipl.-Ing. (FH) Michaela Störkmann, Armacell Manager Technical Department EMEA (Europe, Middle East & Africa)

Sub Chapter Installations

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maximum ambient maximum relative

temperature [°C] humidity [%]

Plant rooms 32 75

Pipe shafts/pipe ducts

- ‘dry’ 24 22

- ‘damp’ 65 85

Cellar corridors 22 85

Ceiling cavities 24 65

(suspended ceilings)

Rooms in offices, 28 70

schools and hospitals

Underground car parks

- badly ventilated 22 85

- ventilated 26 89

Food manufacturing 20 90

DEHRADUN

Meerut Sub-Chapter of ISHRAE was successfully installed

on 4th April 2015 at 7 Eleven Hotel Meerut. More than 70

members participate in the installation ceremony. The oath

to the new team was given by Mr. Jagdeep Singh, DCI

President. Mr. Abid Husain-R.D. North 1, Mr. V.B. Lal,

Treasurer DCI, Mr. M.K. Gupta, IPP, Mr. Ashok Goel

Meerut Past President & Mr. Vikram Maini, Executive

Secretary DCI were also present during the entire

ceremony.

MEERUT

Lucknow Sub-Chapter installation ceremony was

successfully conducted on 11th April 2015 Hotel Sarovar in

the presence of 35 members. The oath to the new team

was given by Mr. Abid Husain, R.D. North 1. President

Elect DCI, Mr. Aneesh Kadyan, Student Activity Chair, Mr.

Subir Das, DCI CWC Member, Mr. Pradeep Dua,

Executive Secretary DCI Mr. Vikram Maini were present

also present during the ceremony. Most of the past

presidents of Lucknow Sub-Chapter of ISHRAE were also

present during the installation ceremony.

LUCKNOW

Agra Sub-Chapter of ISHRAE was installed on 8th April

2015 at Hotel Puspvilla in the presence of more than 50

members. Before the installation members share their

views with the President DCI, Mr. Jagdeep Singh & Mr.

Abid Husain, R.D. North 1 for improvement in membership

promotion and organizing technical events in the chapter.

Later in the evening the new team was installed by DCI

President Mr. Jagdeep Singh. Mr. B.D. Rishi-Zonal Chair

Programs, Mr. Ashwani Sharma, IPP & Mr. Vikram Maini,

Executive Secretary DCI were present during the entire

event.

AGRA

GURGAON

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even under critical

conditions. To achieve

t h i s t h e c o r r e c t

insulation thickness

must be used. Another

crucial factor is the

quality of both the

mater ia l and the

w o r k m a n s h i p .

Particularly in cold

applications, it is worth

having insulation work

carried out by an

expert. Specifiers and

installers often take an

incalculable risk if they

accept inferior quality

for low-temperature insulation, for example by using unsuitable materials or

specifying and installing inadequate insulation thicknesses.

Minimum insulation thicknesses which prevent condensation are usually not

optimally designed for reducing energy losses. As the results of a study carried out by

the company show, much higher energy- and CO2-savings are possible if greater

insulation thicknesses are used. Higher levels of insulation – i.e. insulation thick-

nesses exceeding those required for condensation control – require slightly higher

investments, however these pay off over the operating time and allow substantial

financial savings after a few years.

The thermal conductivity of the insulation material

The heat transfer coefficient

Convection

Figure 3: Build-up zones prevent convective heat transfer

Determining insulation thicknesses Thermal radiation

Figure 4: The ArmWin calculation software provided by

Summary

The measure for the emissive power of a material is the emission

coefficient ? . The measure for the absorptive power is the The thermal conductivity values of materials typically used for

absorption coefficient a. The emissive power of a body of a certain technical insulation range from 0.030 to 0.060 W/(m? K). One

colour is as great as its absorptive power. A vessel which is parameter which influences the thermal conductivity is the mean

completely black has the greatest absorptive or emissive power. temperature. In the case of elastomeric insulation materials such

Table 2 shows the emission and absorption coefficients of some as Armaflex Class O, the thermal conductivity increases as the

surfaces of insulation systems. As the table shows, it is largely the temperature rises. This has a decisive influence on the insulation

nature of the surface of the insulation material or its jacket – apart thickness, because the lower the thermal conductivity, the thinner

from the influence of other radiating bodies – which determines the the insulation thickness. Reputable suppliers of insulation

contribution of radiation ? S to the heat transfer coefficient. A materials only declare the thermal conductivity of their materials in

synthetic-rubber-based insulation material absorbs much more combination with the mean temperature.

thermal energy than, for example, an aluminium foil. This has an

extremely positive effect on the insulation thickness required to

prevent condensation, i.e. the higher the absorptive power, the The heat transfer coefficient depends on the type of flowing lower the insulation thickness. medium, the flow speed, the character of the wall surface (rough or

smooth, shiny or dark) and further parameters. The heat transfer Table 2: Emissivity (å) of various surfaces coefficient usually consists of heat transfer through convection and

Material and surface condition å = aheat transfer through radiation.

makes a substantial contribution towards improving Aluminium foil, shiny 0.05the heat transfer coefficient. The faster the ambient air flows, the Aluminium, oxidized 0.13more heat is transported. Therefore, in practice and when

Steel, galvanized, shiny 0.26designing plant, it is essential to ensure that pipes and ducts have

Steel, galvanized, dusty 0.44sufficient clearance to each other, walls and other installations. If

this is not the case, it is not only difficult to install insulation material Stainless austenitic steel 0.15professionally, there is also the danger of a build-up zone being Alu-zinc, smoothly polished 0.16created. In such areas, the air circulation (convection) needed for a

Arma-Chek Silver 0.83sufficiently high surface temperature is prevented, i.e. in such

Paint-coated sheet metal 0.90build-up zones the heat transfer coefficient is lower (Figure 3). As a

result, the risk of condensation forming increases significantly. Plastic covering 0.90

Flexible elastomeric foam 0.93

Arma-Chek R 0.93Therefore, clearance of 100 mm between the insulated pipes and

from the pipes to the wall or ceiling is required. In the case of Arma-Chek D 0.94

vessels, equipment etc. the distance should even be 1000 mm.

Further details can be found in the appropriate standards.

is a type of heat transfer where the heat is A crucial factor when calculating the insulation thickness needed to transferred by electromagnetic waves. The transfer of energy prevent condensation is whether a flat surface or cylindrical object through radiation is not restricted to one transfer medium. Unlike (pipe) is to be insulated. In the case of cylindrical objects, not only thermal conduction or convection (heat flow), thermal radiation can the ambient conditions, but also the logarithmic ratio of the also spread in a vacuum. In the case of thermal radiation, the diameter of the insulated pipe to that of the uninsulated pipe must mechanism of heat transfer consists of two sub-processes:be included in the calculation. The consequence is that on pipes

• Emission: on the surface of a body with a high temperature thinner insulation thicknesses are sufficient to achieve the same heat is transformed into radiation energy. effect, i.e. to obtain the same surface temperature as on flat

surfaces. The solution can only be determined iteratively. • Absorption: the radiation which strikes the surface of a body

with a lower temperature is transformed into heat. To avoid having to carry out this complicated procedure, a

calculation program such as the new Arm Win program can be

used. Apart from the minimum insulation thickness required for

condensation control, this program can be used to carry out all the

typical calculations both in the refrigeration and air-conditioning

sector and in the heating and plumbing sector. It has completely

revised its calculation program and now offers ArmWin as a

particularly user-friendly aid in on- and offline mode and also as an

app. Compared to the previous version, technical calculations can

be carried out much more easily and quickly. The input required

has been reduced to a minimum. New features include the

possibility of entering individual data on the project in question and

storing calculations as a pdf. Furthermore, ArmWin provides

various interactive functions: calculations can be mailed directly,

the program is linked to product information on the company

website and key terms are explained in a glossary.

Dark-coloured bodies emit more radiation energy than light-Preventing condensation on the surface is a minimum requirement coloured ones; on the other hand, dark-coloured bodies also which all low-temperature insulation must fulfil in the long-term, absorb more thermal energy than light-coloured ones.

Armacell is a world leader in flexible insulation

foams for the equipment insulation market and

also a leading provider of engineered foams. In

the year 2013, the company with more than

2,200 employees worldwide generated net

sales of EUR 415.7 million. With its 20

manufacturing plants in 13 countries on four

continents, The company follows a strategy of

internationalization. The company operates

within two main businesses: The Advanced

Insulation business develops flexible insulation

foam products for the insulation of mechanical

equipment. The Engineered Foams business

develops and markets light foams for use in a

broad range of end-markets.

In addition to ARMAFLEX, the world’s leading

brand for flexible technical insulation, it offers

thermoplastic insulation materials, covering

systems, fire protection and noise control

solutions as well as special foams for a

multitude of industrial applications. In recent

years, it has developed new insulation systems

for the oil and gas market, core foams for

composite materials, and low-smoke products

that are setting new standards in the industry.

www.facebook.com/pages/ISHRAE-Delhi-Chapterwww.facebook.com/pages/ISHRAE-Delhi-Chapter

even under critical

conditions. To achieve

t h i s t h e c o r r e c t

insulation thickness

must be used. Another

crucial factor is the

quality of both the

mater ia l and the

w o r k m a n s h i p .

Particularly in cold

applications, it is worth

having insulation work

carried out by an

expert. Specifiers and

installers often take an

incalculable risk if they

accept inferior quality

for low-temperature insulation, for example by using unsuitable materials or

specifying and installing inadequate insulation thicknesses.

Minimum insulation thicknesses which prevent condensation are usually not

optimally designed for reducing energy losses. As the results of a study carried out by

the company show, much higher energy- and CO2-savings are possible if greater

insulation thicknesses are used. Higher levels of insulation – i.e. insulation thick-

nesses exceeding those required for condensation control – require slightly higher

investments, however these pay off over the operating time and allow substantial

financial savings after a few years.

The thermal conductivity of the insulation material

The heat transfer coefficient

Convection

Figure 3: Build-up zones prevent convective heat transfer

Determining insulation thicknesses Thermal radiation

Figure 4: The ArmWin calculation software provided by

Summary

The measure for the emissive power of a material is the emission

coefficient ? . The measure for the absorptive power is the The thermal conductivity values of materials typically used for

absorption coefficient a. The emissive power of a body of a certain technical insulation range from 0.030 to 0.060 W/(m? K). One

colour is as great as its absorptive power. A vessel which is parameter which influences the thermal conductivity is the mean

completely black has the greatest absorptive or emissive power. temperature. In the case of elastomeric insulation materials such

Table 2 shows the emission and absorption coefficients of some as Armaflex Class O, the thermal conductivity increases as the

surfaces of insulation systems. As the table shows, it is largely the temperature rises. This has a decisive influence on the insulation

nature of the surface of the insulation material or its jacket – apart thickness, because the lower the thermal conductivity, the thinner

from the influence of other radiating bodies – which determines the the insulation thickness. Reputable suppliers of insulation

contribution of radiation ? S to the heat transfer coefficient. A materials only declare the thermal conductivity of their materials in

synthetic-rubber-based insulation material absorbs much more combination with the mean temperature.

thermal energy than, for example, an aluminium foil. This has an

extremely positive effect on the insulation thickness required to

prevent condensation, i.e. the higher the absorptive power, the The heat transfer coefficient depends on the type of flowing lower the insulation thickness. medium, the flow speed, the character of the wall surface (rough or

smooth, shiny or dark) and further parameters. The heat transfer Table 2: Emissivity (å) of various surfaces coefficient usually consists of heat transfer through convection and

Material and surface condition å = aheat transfer through radiation.

makes a substantial contribution towards improving Aluminium foil, shiny 0.05the heat transfer coefficient. The faster the ambient air flows, the Aluminium, oxidized 0.13more heat is transported. Therefore, in practice and when

Steel, galvanized, shiny 0.26designing plant, it is essential to ensure that pipes and ducts have

Steel, galvanized, dusty 0.44sufficient clearance to each other, walls and other installations. If

this is not the case, it is not only difficult to install insulation material Stainless austenitic steel 0.15professionally, there is also the danger of a build-up zone being Alu-zinc, smoothly polished 0.16created. In such areas, the air circulation (convection) needed for a

Arma-Chek Silver 0.83sufficiently high surface temperature is prevented, i.e. in such

Paint-coated sheet metal 0.90build-up zones the heat transfer coefficient is lower (Figure 3). As a

result, the risk of condensation forming increases significantly. Plastic covering 0.90

Flexible elastomeric foam 0.93

Arma-Chek R 0.93Therefore, clearance of 100 mm between the insulated pipes and

from the pipes to the wall or ceiling is required. In the case of Arma-Chek D 0.94

vessels, equipment etc. the distance should even be 1000 mm.

Further details can be found in the appropriate standards.

is a type of heat transfer where the heat is A crucial factor when calculating the insulation thickness needed to transferred by electromagnetic waves. The transfer of energy prevent condensation is whether a flat surface or cylindrical object through radiation is not restricted to one transfer medium. Unlike (pipe) is to be insulated. In the case of cylindrical objects, not only thermal conduction or convection (heat flow), thermal radiation can the ambient conditions, but also the logarithmic ratio of the also spread in a vacuum. In the case of thermal radiation, the diameter of the insulated pipe to that of the uninsulated pipe must mechanism of heat transfer consists of two sub-processes:be included in the calculation. The consequence is that on pipes

• Emission: on the surface of a body with a high temperature thinner insulation thicknesses are sufficient to achieve the same heat is transformed into radiation energy. effect, i.e. to obtain the same surface temperature as on flat

surfaces. The solution can only be determined iteratively. • Absorption: the radiation which strikes the surface of a body

with a lower temperature is transformed into heat. To avoid having to carry out this complicated procedure, a

calculation program such as the new Arm Win program can be

used. Apart from the minimum insulation thickness required for

condensation control, this program can be used to carry out all the

typical calculations both in the refrigeration and air-conditioning

sector and in the heating and plumbing sector. It has completely

revised its calculation program and now offers ArmWin as a

particularly user-friendly aid in on- and offline mode and also as an

app. Compared to the previous version, technical calculations can

be carried out much more easily and quickly. The input required

has been reduced to a minimum. New features include the

possibility of entering individual data on the project in question and

storing calculations as a pdf. Furthermore, ArmWin provides

various interactive functions: calculations can be mailed directly,

the program is linked to product information on the company

website and key terms are explained in a glossary.

Dark-coloured bodies emit more radiation energy than light-Preventing condensation on the surface is a minimum requirement coloured ones; on the other hand, dark-coloured bodies also which all low-temperature insulation must fulfil in the long-term, absorb more thermal energy than light-coloured ones.

Armacell is a world leader in flexible insulation

foams for the equipment insulation market and

also a leading provider of engineered foams. In

the year 2013, the company with more than

2,200 employees worldwide generated net

sales of EUR 415.7 million. With its 20

manufacturing plants in 13 countries on four

continents, The company follows a strategy of

internationalization. The company operates

within two main businesses: The Advanced

Insulation business develops flexible insulation

foam products for the insulation of mechanical

equipment. The Engineered Foams business

develops and markets light foams for use in a

broad range of end-markets.

In addition to ARMAFLEX, the world’s leading

brand for flexible technical insulation, it offers

thermoplastic insulation materials, covering

systems, fire protection and noise control

solutions as well as special foams for a

multitude of industrial applications. In recent

years, it has developed new insulation systems

for the oil and gas market, core foams for

composite materials, and low-smoke products

that are setting new standards in the industry.

We take this opportunity to invite you to become a member of ISHRAE.

This Society consists of individuals interested and actively involved in the field of Air-conditioning, Heating, Ventilation & Refrigeration and related Building Services Founded in 1981, with only 4 members, today its membership has grown to nearly 12000 with a local presence, called Chapter, in 40 cities of India. The Society is run by the Board of Governors comprising of professionals from the Industry, all doing voluntary work for ISHRAE.

- You get to know more about the Industry you work in. You get to know major players in the HVAC&R Industry. You also get to know the names/ titles of Who is Who in the Industry. ISHRAE also opens the window to the outside world-International awareness, through associate Societies like ASHRAE, REHVA and many more.

- It gives you a sense of belonging to an Industry from where you earn your Bread & Butter & in many cases Jam & Honey! You get an Identity- Member ISHRAE. This enhances your status in Society. For employed persons, the Bio-data gets embellished as a member of a professional body.

- There are several ISHRAE Publications including the popular bi-monthly AC&R JOURNAl, which provide a world of information on a variety of subjects. There is also the ISHRAE Institute of Excellence (IIE) to upgrade knowledge. You can also benefit by participating in Certification Courses which are recognized by the Industry. Participation in Workshops/ Training Programs/ Seminars/Product Presentations helps to increase your domain expertise.

- ISHRAE meetings provide an opportunity to network with Industry professionals. It also gives a rare opportunity to meet in a relaxed environment, the busy and prominent Senior Executives or Consultants. The dividend possibility from this networking is enormous. You may even meet International suppliers/ HVAC Consultants/ Professors/ Officials from Government Organizations, at ISHRAE Events & Programs.

- In most cases you rarely get to meet your competitors, suppliers, customers in the same forum. In ISHRAE get -togethers you may run into persons from your field, and get to exchange views in an informal setting.

- Each one of us has tremendous potential in one field or another. This Society provides an opportunity to share your experience, to make a contribution. If you have organizational ability you may be considered to join the Chapter Committee and be involved in various other committees. It helps flower one’s leadership qualities, by encouraging the individual to take steps in a friendly environment & hone his leadership ability. One could even rise to the coveted position of National President-ISHRAE, based on services rendered to the Society & Industry.

- You never know who can give you an enquiry at an ISHRAE evening! The small investment of Rs. 4,500/- pays for itself, its not even equivalent to a 5-star dinner for you!

Increased Awareness:

Sense of Belonging:

Learning Opportunity:

Networking:

Industry Interaction:

Platform for Self-development:

Good for business:

All of the above is available to you at a nominalmembership fee of Rs 4,500/- for first 3 years of membership.

These charges comprise of one time Registration fee of Rs.2250/- and anAnnual Membership Charge of Rs.750/- for 3 years

For any queries please contact

Mr. Vikram Maini, 502, DDA Building, District Centre, Laxmi Nagar, New Delhi-110092Tel: 011-43001814/22540537, Email: vikram.maini@dcishrae.org, Website: www.dcishrae.org

JOIN ISHRAEINDIAN SOCIETY OF HEATING, REFRIGERATING, AND AIR-CONDITIONING ENGINEERS

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