Air Filtration Design and Application

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Welcome to the Camfil Farr Training Academy

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By the end of this session you will know more about

Air Filtration Design and Application selection methods

using Low Energy Air Filters to deliver clean air and

make energy savings

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Low Energy Air Filters

2011 global sales £435 million

24 Production Plants, 4 R&D Centres

3500 employees

Production Facility ●

Sales Office ●

Agent ●

Head Office ●

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Air Filtration must deliver clean Indoor Air Qualit y

Clean air that people can breathe without risk to health

Optimised selection for plant energy efficiency and low running costs

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Comfort air

A healthy and beneficial climate

OfficesHotelsSchoolsShopping centresConference centresAirports

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Clean processes

Protecting processes

Bio PharmaFood and beveragePulp and paperAutomotiveHospital

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Camfil Farr Low Energy Air Filters use to save

Money, Energy and Carbon

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Meet Part L energy guidelines by reducing fan energy consumption in mechanical ventilation and AC systems

Optimize the air filter selection and performance in refurbished ventilation and Air Conditioning systems

Help your clients gain the benefits of


both in new and existing buildings

See the Energy Saving Opportunity£14430 per year

There are about 50000 buildings with large AC systems CIBSE

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The Low Energy Air Filter opportunity

1. Why we need Air Filters ?

2. The energy consumed by Air Filters ?

3. How we optimise our Air Filter Selection ?

4. Life Cycle Costing (LCC) and Air System Factors ?

5. Payback time. Return on Investment (ROI) What is the benefit?

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Low Energy Air Filters for Indoor Air Quality

The primary purpose of Air Filters in building HVAC systems is to filter

and clean air for people to breathe without risk to health.

The secondary purpose of Air Filters in building HVAC systems is to

filter air to keep clean and protect the air plant duct system and the

internal fabric of the building.

Why we need Air Filters?

Air Quality problems in the UK

UK Government report indicates PM2.5 pollution is 3X more damaging to public health than passive smoking.

5X more damaging than loss of life due to road accidents

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• We spend 80% of our time inside

• 50 % of all particles inside come

from outdoor air. 50 % are

generated from indoor sources

• The particles penetrate the building

through ventilation or leaks.

• Air pollution adversely affects the

growth of lung function during the

period of rapid lung development

that occurs between the ages of 10

and 18. (The New England Journal of Medicine)

Stay healthy – stop breathing?

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Graph indicating probability of progress of PM ultra-fine particulate pollution into the human respiratory system

The relevant standards for Low Energy Air Filters

The filter test standard that applies to the testing of air filters is EN779:2002

EN13779:2007 advisesF7 as a minimum and

F9 as the advised for required particulate efficiency

www.camfil.co.uk 14

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Particulate Efficiency %

Particle Size Microns

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A Typical Air Handling Unit and its component sections

1 - Supply air duct2 - Fan section3 - Flexible connection4 – Heating/Cooling coils5 - Filter section6 - Air intake duct

• Air filters separate any airborne particles from air flow.• Their purpose is to :

• provide clean air and Indoor Air Quality to building occupants• keep the HVAC system clean and energy efficient

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Air Handling Unit energy flow

Pre-filter Secondary-filter

Intake Air

Frost coil

Supply Air

Damper

Cooling coil

Heating coil

FAN

MOTOR

Gas-filter (Carbon)

Attenuator

OUTSIDE INSIDE

FAN

Electrical Energy input via motor

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Energy consumed by air filters

The cost of ventilation

• The energy requirement for

ventilation is expensive.

• Filters account for approx. 30% of

the total energy cost of the

system. (C.I.B.S.E. data)

• Filters are the most inexpensive

part of the system to improve.

• Without Capital Expenditure

Clean air with economic benefits

30% of total system pressure loss

40%

20%

4%

Pascal

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The energy demand

This equation calculates the kilowatt hours consumed by an element of a ventilation system based upon average pressure loss

[ ]kWh/year1000η

tdPqE

×××=

q = Air flow (m3/s)

dP = Pressure drop (Pa)

t = Operating time (hours/year)

h = Fan efficiency (20% - 65% ?)


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Energy Optimisation with Low Energy Air Filters

For example using F7 filter grade as advised by BS:EN13779:2007

Options:

6 pocket 380mm long bag has about 200pa pressure drop initially

12 pocket 635mm long bag has about 85pa pressure drop initially

Over a period of one year allowing for the pressure drop increases as the filters work the estimated save in energy consumption as below.

**Energy £300 the difference in filter price is about £30**

(Ratio 10:1 at 10p per KW/hr.)

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Energy consumed by Air Filters

Choosing the right bag filter saves Energy

• Low Energy Air Filters use an

optimised design in order to

minimise energy consumption

with Tapered stitch on

pockets.

Poorly manufactured pockets lose

performance, use more energy


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Office block 8000M2 floor

area with 30 full size filter

apertures. (3 AHU’s)

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This office block can show an

energy saving of £ 14430 per year with the equivalent of

3 AHU’s as shown in the next

slide.


Example of urban offices block and savings

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Energy saving on one AHU volume flow 10m3/s over one year

F7 Bag + G4 Panel F7 Hi-Flo Bag

2.9 M2 Media 9.2 M2 Media

This represents a money saving of £ 4810 per year on

this AHU or saving of over 70% on electrical energy.

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Replaced by

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How we optimise our

Low Energy Air Filter selection

A Hi-flo F7 M7 Bag filter

with 9.2 M2 of micro-

fibre media has the

optimum low pressure

drop and consistent high

particulate efficiency

with a longer working life

BS:EN13779:2007 advises F7 minimum efficiency

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Hi-Flo F7 + Hi-Flo F7 to give F9

How we optimise our air filter selection

Camfil Low Energy Air Filters optimise Energy performance and Air quality

Note: It is required that these F7 filters are mounted in front withdrawal frames to

ensure there is no significant air bypass

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Hi-Flo F7 is the optimum single stage F7 solution

Recommended Low Energy Air Filter types

For the best LCC performancefilter in class F7. Recommended models are

1. Hi-Flo M7

2. Opakfil F7For compact systems

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1.

2.

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00.1 1 10

Particle size (µm)

Diffusion

Interception

Straining, Inertia

100 %

Total Efficiency

Electrostatic

MPPS region

When a new filter looses its electro-static charge the particulate efficiency drops significantly

E [%]

Comfort ventilation

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Typical Particle

=> .4 micron

Synthetic Competitor F7 S-Flo F7

Hi-Flo F7

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How we optimise our air filter selection

Impact assessment

• 200 Buildings

• Serviced by 5 air handing units

• Each having 10 standard 2 stage apertures

• Number of 2 Stage apertures

• 200 x 5 x 10 = 10,000 apertures

• Will make annual Energy savings (considered on above criteria)

• WILL SAVE ENERGY VALUE OVER 2.3 MILLION POUNDS

• EACH YEAR EVERY YEAR

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Life cycle costing & air system factors

Energy is part of the Eurovent LCC model

The life cycle cost for the filter is the cost of the:

• Filters

• Labour

• Energy consumption

• Cleaning of ventilation system

• Disposal of used filter

= LCC


HVAC Filter Specification guidance Design for an efficient future

HVAC Secondary filters to be selected to EN13779:20 07 guidelines F7 to F9 class

Air Filters to have been tested in accordance with BS EN779:2012

Eurovent Life Cycle Cost for Air Filters to be used to optimise air filter selection

The Air Filter manufacturer to be independently ac credited by Eurovent

Air Filters are to be manufactured under approved q uality system BS EN 9001:2000

BS EN13053 advises minimum F7 for single stage AHU systems

Design details

BS EN1886:2007 test limits for air bypass in Air Handling Units mean that FWF front withdrawal filter mounting frames will be required. Air Handling Units are normally fitted with both Primary and Secondary Air Filters sections minimum length 700mm.long suitable for full length Bag filters. In general for HVAC applications Microglass Hi-Flo media is recommended as it has a consistent particulate efficiency throughout its working life.

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Short Payback time

Air Conditioning Inspection reports can save Energy, Carbon

and Money - A typical neglected AHU

• Rare access to poorly

maintained AHU’S needing

refurbishment.

• Opportunity for solution of

Low Energy Air Filters to

deliver air of the required

Air quality, and using the

minimum of energy.

• Short payback time of a few

months makes AHU air

filter bank refurbishment

an attractive option.

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Filter optimisation gives shortest payback time

Annual Savings – for a 10 m3/s system

Element % Kwhr £ Revenue or capital Payback

Upgrade filters 22% 6000 600 Revenue < 3 months

Clean coils 10% 2500 250 Revenue < 6 months

Upgrade fans 35% 60000 6000 Capital > 24 months

Upgrade chillers 40% 136000 13600 Capital > 36 months

Table is prioritised by payback period

Data source – EECO2 Energy Efficiency Consultants (Low Carbon Consultants)

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Low Energy Air Filter Service Packages

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• Low Energy Air Filter AHU filter mounting upgrades

• Complete Low Energy Air Filter installation and maintenance contracts

• AHU filter monitoring with demonstration of benefits

• Additional Duct cleaning and coil cleaning AHU system packages.

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• Labour to replace filters would reduce by half or greater

• Waste disposal would reduce by half or greater

• Supply chain environmental impact would reduce as well

• CO2 reduced substantially

• A sustainable option

• Case studies for sectors

• Consistent performance

• www.lowenergyairfilter.co.uk

• www.ac-inspection.co.uk

Short Payback time

Significant savings with Low Energy Air Filters

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Short Payback time

Energy Opportunities

Major Focus on Cost and Saving the Environment.

Our Air Filter Solutions contribute to

- Healthy Indoor Air Quality

- Reduced ”Carbon Footprint”

- Cut Energy Consumption

We are all looking for Savings

-These represent no risk to your client

- No capital expenditure

- Revenue payback – 3 months

Camfil Farr 1 st Manufacturer in UK to achieve EN16001 in UK

European union target By 2020

-20% energy consumption, -20% fossil fuels, +20% renewable energies

Camfil Achievements so far :

Tangible reductions in Energy consumption Gas 35%,

Electricity 22%, Diesel fuel 19% Environmental targets Water 12%,

& Waste 17% reductions

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See the Energy Saving Opportunity£14430 per year

There are about 50000 buildings with large AC systems CIBSE

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THANK YOU for attending this webinar session

ANY QUESTIONS?

Please do not hesitate to contact Camfil Farr for any additional information or to arrange a visit.

For more information about clean air solutions, improving air quality, low energy air filters, CRC (Carbon Reduction Commitment), AHUs (Air

Handling Units) and the EPBD, visit the

www.lowenergyairfilter.co.uk

www.keepthecityout.co.ukblog and subscribe to the RSS Feed

Air Filtration Design and Application

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Transcript of Air Filtration Design and Application