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THE HOT AIR RECORDER ASHRAE Houston Chapter’s 77th Volume

No. I

Monthly Meeting Until further notice, Houston ASHRAE meetings will be held virtually. For our first meeting of the year, we are excited to welcome William P. Bahnfleth, Ph.D., P.E., to discuss key issues relating to protec-tion of building occupants from chemical and bio-logical releases. Click here for more information and to register.

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August

13

2020-2021

HOUSTON

ASHRAE

OFFICERS

President President-Elect

Josh Vanlandingham

Vice President

Greg Tinkler John Neubauer

Treasurer

Michael Green

Secretary

Ayman Ashkar

Past President

Kurt McCulloch

WANT TO BE FEATURED IN THE NEWSLETTER?

Show off your work from home space and take a picture of you attending the next virtual meeting. Best photos will be featured in

the HAR.

Email submissions to Julie Thomet (Juliet@mjec.com). Funny pictures are encouraged, but keep it appropriate!

William Allen Gregory, Sr.

July 10, 1939– July 22, 2020

Click here to read the

ASHRAE in memoriam

article

Click here to read the obituary

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PRESIDENT’S MESSAGE Well we are off to a new interesting year at

ASHRAE Houston. First off I would like to rec-

ognize our Officers and Board of Governors

for agreeing to serve this year. Those indi-

viduals are:

I ALSO WANT TO SAY A BIG “THANK YOU” TO ALL OF

THE COMMITTEE CHAIRS WHO HAVE AGREED TO HELP GUIDE

US THROUGH ALL INS AND OUTS OF EACH COMMITTEE AREA OF

EXPERTISE.

We have almost 20 subcommittees in our

Chapter. On that note, if any of you want

to help serve your ASHRAE Houston Chapter

on one of these committees, please let one

of the officers or BOG members know. We

will find a place for you.

We are also off to an interesting start this

year and a challenge for all of us. We are

all still dealing with SARS 2 and the COVID

19. We will have several speakers this year

to bring us all up to speed on what the

studies show and how we should address it

in the built environment.

OUR AUGUST 13TH MEETING WILL HELD VIA ZOOM AND WILL FEATURE WILLIAM BAHNFLETH

TO DISCUSS KEY ISSUES RELATING TO PROTECTION OF BUILDING OCCUPANTS FROM CHEMICAL AND BIOLOGICAL

RELEASES, SO PLEASE REGISTER.

On another note, the HESS club has decid-

ed to close its doors forever, so we will not

longer be able to meet there. Josh and his

team are avidly looking for a new location

once we can meet in person again get to

network and have discussions with our

speakers and friends in the industry.

ASHRAE Society continues with their

“Committees” to investigate and publish

papers and distribute information on SARS 2

as well as several of the universities. Of re-

cent note is the U of H research and release

of a filtering unit that filters and kills the SARS

virus. Tulane also recently released a study

that SARS is stable in the air with no degra-

dation over 16 hours which is something

most viruses of this type have a decay rate

much shorter than that. Having spent 5

years in the US Army as a Chemical and

Biological weapons specialist, this was of

interest to me and should change the way

we in built environment think about this

pandemic. One thing that ASHRAE society

has definitely encouraged our market to do

is implement designs that keep the humidity

levels between 40-60% RH all year long, so

for those of us that work all over, we should

encourage more use of humidifiers.

You will also see in the HAR that we have

lost a long time member of our industry, Bill

Gregory Sr. I hope all of us will take a mi-

nute to remember him.

As we kick this year, I also want to thank all

those who have supported the Houston

Fund Raising Campaign as we have always

been one of the top Chapters year after

year and society really depends on us to

continue that. I suspect this is gong to be a

tough year for all of us but I would hope

those that are able to help us achieve our

funding goal will do so this year. And if

there is anything I can do to help you,

please let me know. Garrett will be in

touch with all of our historic donors as well

as reach out to some new ones to assist the

Houston Chapter in its goal that has been

placed on us. These types of donations is

what helps ASHRAE fund the research and

publish the articles that helps all of us in our

jobs.

Sincerely,

Officers

President Greg Tinkler, CGD

President Elect Josh Vanlandingham, PE

Vice President Garrett Nuebauer, PE

Treasurer Michael Green, PE

Secretary Ayman Ashkar, PE

Past President Kurt Mculloch

Board of Governors

Allan Neely

Bruce Flaniken, PE

Keith Riehl, PE

Mike Langton, PE

Greg Tinkler Houston ASHRAE President

2020-2021

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MONTHLY MEETING HVAC AND RISK FROM

AIRBORNE HAZARDS: Interest in protection of building occupants from airborne chemical and biological agents was strongly stimulated by several terrorist incidents early in the 21st century. The discussion generat-ed by these incidents brought to the forefront the concept of formal risk assessment for airborne hazards, which few building designers or owners undertake. Over time, the discussion of HVAC security has declined without significant changes having been made to either design require-ments or procedures, yet the issue remains and is more important than is generally acknowledged, since accidental exposures have the potential to be just as harmful as intentional ones. This presen-tation provides an overview of the key issues re-lating to protection of building occupants from chemical and biological releases including: HVAC system and building characteristics that affect exposure, the spectrum of available coun-termeasures and their characteristics, risk assess-ment processes, and metrics for describing the level of risk and degree of improvement achieved by a risk reduction strategy.

$10– ADVANCED REGISTRATION

$15– AFTER AUGUST 12TH

$15– ALL NON-MEMBERS

CLICK HERE TO REGISTER

GET TO KNOW

THE SPEAKER: WILLIAM P. BAHNFLETH, PH.D., P.E

AUGUST 13TH, 2020

William Bahnfleth is a professor of architectural engineering at the Pennsylvania State University (Penn State) in University Park, PA, where he has been employed since 1994. Previously, he was a Senior Consult-ant for ZBA, Inc. in Cincinnati, OH and a Principal Investigator at the U.S. Army Construction Engineering Research Laboratory in Cham-paign, IL. He holds BS, MS, and PhD degrees in Mechanical Engineering from the University of Illinois, where he also earned a bachelor of music degree in instrumental perfor-mance. His is a registered profes-sional engineer. At Penn State, Dr. Bahnfleth teaches undergraduate courses in HVAC fundamentals, HVAC system design, and controls and graduate courses in chilled water systems, hot water and steam systems, and indoor air quali-ty. His research interests cover a wide variety of indoor environ-mental control topics including chilled water pumping systems, stratified thermal energy storage, protection of building occupants from indoor bioaerosol releases, ultraviolet germicidal irradiation sys-tems, and others. He is the author or co-author of more than 170 tech-nical papers and articles and 14 books and book chapters. He consults on the design of chilled water thermal energy storage systems and has been involved in more than 20 projects world-wide.

Dr. Bahnfleth is a fellow of ASHRAE, the American Society of Mechanical Engineers (ASME) and the International Society for Indoor Air Quality and Climate (ISIAQ). He has served ASHRAE in a variety of capacities, including Student Branch Advisor, Chapter Governor, Technical Committee and Stand-ing Committee Chair, and as Director-at-Large, Vice President, Treasurer, and 2013-14 Society President. His honors include a 1st place ASHRAE Technology Award, Transactions Paper Award, Distinguished Service and Exceptional Service Awards, The Louise and Bill Holladay Distinguished Fellow Award, the E.K. Camp-bell Award of Merit and the F. Paul Anderson Award. He is also a recipient of the Penn State Engineering Alumni Society’s World-Class Engineering Faculty Award.

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MEMBERSHIP

TREASURER

Please welcome our new members: : Mike Roe, Terry Tunning, Chandra Yelamanchili, Matthew Crump,

Christopher Calvillo, Jared Sommer, Matthew Headley, and Matthew Howsmon

Join or renew through www.ashrae.org/home

If you have any questions, contact membership@ashraehouston.org

2020-2021 MEMBERSHIP PROMOTION COMMITTEE

Tim Navarro Bryan Clark Shannon Yancey Jeff Hunter

20-21 Treasurer: Michael Green

Chapter is in good

financial standing

✔ Books are being

transferred from

Garrett Neubauer

to Michael Green

2019 taxes are

being filed

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YEA

Hello Houston YEA members! We hope this finds you

well during these uncertain times. Due to COVID-19, our in

person happy hours, technical tours, and other events are

on pause. We are optimistic that all of this will be behind us

soon. Please check the website and future Hot Air Record-

ers for updates. We hope to see you all at our first in person

event, when it is safe to do so. Please reach out to us if you

have any questions.

Sincerely,

Marisa Kamstra & Nick Janssen

Marisa Kamstra

2020-2021

YEA Co-Chair

Nick Janssen

2020-2021

YEA Co-Chair

LAUREN RAMOS

The Women in ASHRAE Co-Chairs, Lauren Ramos and

Catherine Tinkler, have returned for another year to sup-

port and promote women in ASHRAE and the HVAC industry

as whole. They are monitoring the COVID-19 situation carefully

with respect to WiA events. The health and wellbeing of mem-

bers will always be the top priority. If/when events for Women in

ASHRAE events resume, updates will be made to the newsletter as

well as the website.

If you have any questions or concerns, reach out to Catherine or Lauren at:

ctinkler@cannondesign.com | lauren.ramos@hendersonengineers.com

CATHERINE TINKLER

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REFRIGERATION

Manuchehr Mehdizadeh Lifetime ASHRAE Member

Committee Officer @ IIR

Refrigeration Chair @ ASHARE

Houston Chapter

This being my first article for our Chapter’s Newsletter,

my objective is to attract in particular the interest of YEA

and other chapter members towards the strategic

profession of Industrial Refrigeration Technology. As

indicated in the article, not only does it involve more

bespoke engineering design, but also leads to larger

commercial prospects compared to those in the HVAC

industry.

“ “ Before I discuss the impact of industrial refrig-eration (or cold chain) industries from a commercial aspect, it would be relevant to briefly touch on the status of air conditioning industries in our daily lives. It’s ironic that both industries are covered by the same principles of heat transfer systems, follow Thermody-namic Principles, and use Psychrometric Charts to begin their heat load calculations, yet these and other factors seem to be handled differently by each indus-try.

The ‘R’ (Refrigeration) letter is a significant element of ASHRAE, where both are individual indus-tries conforming to relevant ANSI/ASHRAE Standards & Codes (particularly to Safety Standard 15). Interesting-ly, Refrigeration further follows applicable codes & standards set forth by ANSI approved IIAR of USA and supporting authoritative associations. European coun-tries, in addition to ASHRAE, tend to follow codes & standards set forth by UN/USNC-affiliated to IIR (based in Paris, France), while also supporting other affiliated standards. More so, in refrigeration system design works, we refer to Pressure-Enthalpy diagrams and at times to The Mollier Diagram (a variant of the Psychro-metric Chart), which are graphic representations of the relationship between air temperature, moisture content and enthalpy. They’re basic design tools for building engineers & designers. It’s worth mentioning that during 2019, ASHRAE TC 1.6, Terminology, expand-ed its inside ASHRAE harmonization efforts by going outside ASHRAE for the first time. They worked with Refrigeration Subject Matter Experts (SMEs) from ASHRAE and the International Institute of Refrigeration (IIR) to create agreed-upon definitions for terms used by both IIR and ASHRAE.

As defined by ASHRAE, the human healthcare & comfort ‘Air Conditioning’ systems usually work a small, well-defined range of evaporating tem-peratures, typically 2C to 13C. Because of these lim-ited temperatures and the large market for air condi-tioning equipment, manufacturers standardize their (chilled water & DX) equipment and package it for volume production at lower cost. While air condition-

ing systems are highly recommended for human health & comfort, the refrigeration system plays a more strategic role impacting global survivability. This is be-cause refrigeration plays a major role in today’s global economy with significant contributions towards food, health, thermal comfort, energy and environmental domains. ASHRAE defines ‘Refrigeration’ as the process of moving heat from one location to another by use of refrigerant gas in a closed refrigeration cycle where oil management, gas & liquid separation, sub-cooling, superheating and piping of refrigerant liquid, gas and two-phase flow are all part of refrigeration. Ammonia refrigeration also applies to commercial air condition-ing & industrial refrigeration.

IIR estimates the refrigeration sector’s impact on climate change accounts for approximately 20% of the overall electricity used worldwide and 10% of glob-al greenhouse gas emissions. Thus, the sustainable growth of refrigeration sector in the coming years is due to cooling needs in various sectors of our lives and of course demand for sustainability.

The Refrigeration industry utilizes custom de-signed built-up systems, supports various applications, extensively involved in chilling & freezing technologies. The functions of refrigeration systems are: a) to reduce the temp of substance- the act of cooling; b) to trans-form a substance (phase change function) from one state to another –as water to ice; c) to transform a substance from one state to another – as in the stor-age of ice or the preservation of food products. Indus-trial refrigeration systems commonly operate 16-20 hrs. per day, as compared to perhaps 8-12 hrs. per day for air conditioning systems. Generally component mate-rials used on industrial refrigeration systems are heavy-duty industrial type, and when designed and installed correctly, remains durable for perhaps 30 to 40 years of its operation period, as compared to 18-22 years for air conditioning systems.

In the industrial refrigeration sector, it is not the volume of gas pumped nor the piston displace-ment of the compressor determines the amount of cooling performed, but rather the amount of cooling

depends on the weight of the gas condensed and evaporated. This would mean that the production of low temperature requires circulation of large quantities of low-pressure gas. This is where the ‘natural’ choice in selecting ammonia refrigerant gas stands undisputed on large installations. Its characteristics at 20F evaporating and 95F condensing temp, the results on the liquid to vapor volume ratio (for say one TR) is calculated at 1:238, which is by far the highest & the best ratio achieved as compared to other refrigerant gasses.

From an economic perspective, for 2018-19, according to IIR, 15 million people are globally em-ployed in the refrigeration sector, where it is estimated that overall global sales of refrigeration equipment to be over 180 Billion USD. While the air conditioning & heat pump sector globally employs far more than 15 million people and its global sales during 2018-19 was estimated between 100 to 120 Billion USD. (Global Sales figures mentioned herein are estimates)

As we all have experienced, the world has felt the impact of the corona virus and subsequent pandemic where the focus continues to be curtailing the spread and discovering a suitable vaccine. Given this pandemic is feared to linger on longer than ex-pected, safety & security governing bodies need to urgently introduce new regulatory requirements on various building & facilities’ engineered systems & op-erations including industry codes & standards for ASHRAE , IIAR, NFPA, OSHA, GMP, ANSI, HACCP, EPA etc taking into account the impact of the virus on our daily business life and practices.

In closing, I’d like to mention that the ‘World Refrigeration Day’ (supported by ASHRAE & IIR) takes place every June 26th, celebrated as the national day of cooling – sort of coolest day of the year. This day is celebrated in recognition of the tremendous contribu-tions that Refrigeration and Air Conditioning brings to our societies.

Click here to view the original article.

BASICS ON AIR CONDITIONING VS. REFRIGERATION WRITTEN BY: MANUCHEHR MEHDIZADEH

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STUDENT ACTIVITIES

STUDENT ACTIVITIES CO-CHAIRS

JIAJUN “FRANCIS” LIAO

ELMER WHITEHEAD

TERENCE CONNOR

Over the course of 30 years ASHRAE has awarded over $2.25

million to 400+ deserving students. Click here to find out what

kinds of scholarship opportunities are available and how to

apply.

Learn how ASHRAE is involved at the K-12 level, and how you

can get involved too!

ASHRAE enhances understanding of HVAC&R system design

and sciences through competition. Click here to learn more

about past competitions, and ones that are coming up.

Stay up to date on the latest news and resources available to

you by signing up for the student newsletter.

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GRASSROOTS GOVERNMENT 2020-2021 GRASSROOTS GOVERNMENT

ADVOCACY CO-CHAIRS

KENNETH SHIFFLETT KEITH REIHL

Have you been to ASHRAE’s Government Affairs page? There are landing pages for ASHRAE position documents on

issues, a newsletter sign up, advocacy tool kits, Engineer’s Week, among others.

https://www.ashrae.org/about/government-affairs

The ASHRAE Policy Position and Issues page has a wealth of information a wide breadth of topics, including recom-

mendations for reopening businesses and schools.

https://www.ashrae.org/about/government-affairs/policy-positions-and-issues

USEFUL RESOURCES

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SUSTAINABILITY SUSTAINABILITY

CO CHAIRS

Gus Faris

Kapil Upadhyaya

FUN FACTS ABOUT ELECTRIC HEATERS WRITTEN BY: GUS FARIS

Electric Heaters are commonly used in many commercial applications in our industry. The most common commercial HVAC applica-tions are installed or attached on fan coils.

When the heating elements are ener-gized, the elements produce heat which must be cooled by the airstream in order to keep the heater from creating a fire hazard in the struc-ture. Heat limiting devices are built into the heaters to interrupt power to the heater in the event of a failure. During normal operation the equipment is designed to limit discharge air to a maximum of 15°F above room ambient. If the heated air is more than 15°F above ambient, the fan will not be able to blow the air to the floor due to buoyancy of the warm air. When the entering air is in excess of 15°F above room ambient, ankles will be cold, and people will have heating devices under their desks. The greater the temperature, the less room heating and the worse comfort conditions will be. In overheating conditions, the high temperature limits will limit this temperature to 120°F to 140°F in auto reset mode and about 210°F in cata-strophic failure mode.

Safety tests (UL 1995 or UL1996) are run on all equipment with electric heaters to prove that the equipment will not attain combustible temperatures during normal and abnormal conditions due to the settings and arrange-ments of the heat limiting devices. Abnormal conditions include fan failure, inlet or outlet

duct blockage, voltage excursions, etc. During these tests it is normal to have well over 100 thermocouples or thermistors measuring the temperature of the discharge airflow, the out-side of the equipment and on both the inlet and outlet ducts.

During normal operation these elements will operate around 600°F to about 800°F. Since the mass of the elements is relatively small, the air can easily carry away the heat. However, when the airflow is restricted and falls below the mini-mum specified values, the temperature of the wire can climb rapidly. Temperatures of 1,500 to 2,000°F are possible.

Irreversible damage will occur to the electric heater if the minimum airflow per kW is not met during any point in the heating cycle if the heater continues to operate. The severity of the damage will be proportional to the time the heater operates below the recommended air-flow and the magnitude of the difference be-tween the recommended airflow and the oper-ating airflow.

Examples of low airflow damage are: discolored, heat stressed element wires, re-duced insulation thickness near element stud connections inside the control box, burnt or melted wire insulation inside the high voltage controls enclosure, and sagging or melted ele-ment wires leading to electrical short circuits. This list is indicative of types of issues that may arise, but it is not exhaustive.

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BOG MINUTES

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BOG MINUTES

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ROSTER Position Full Name Phone Email

Chapter President Mr Greg Tinkler (713)328-3775 gtinkler@pagethink.com

Chapter President Elect Mr Josh Vanlandingham, PE (713) 515-3726 jjvanham@gmail.com

Chapter Vice President Mr John G Neubauer, PE (713) 871-8484 gneubauer@pagethink.com

Chapter Treasurer Mr Mike Green, PE (713) 626-7155 mjgreen@dominioninterests.com

Chapter Secretary Mr. Ayman Ashkar (713) 914-0888 aashkar@dbrinc.com

Chapter Board of Governors Mr Kurt McCulloch (713)898-2874 kmcculloch@convergentz.com

Chapter Board of Governors Mr Bruce L Flaniken, PE (832)473-1989 BLFlaniken@houstonmethodist.org

Chapter Board of Governors Mr Robert (Alan) Neely (281)432-9864 alan.neely@owenscorning.com

Chapter Board of Governors Mr Michael Langton, PE (832)867-7149 mlangton@langtonenergy.com

Chapter Board of Governors Mr Keith H Reihl, PE (713)459-1044 reihl@swbell.net

Chapter Attendance Committee Ms Christy Troutman (713) 658-2211 ctroutman@pagethink.com

Chapter Delegate Mr Joshua J Vanlandingham (713) 515-3726 jjvanham@gmail.com

Chapter Alternate Mr John G Neubauer (713) 871-8484 gneubauer@pagethink.com

Chapter Technology Transfer Chair Mr Joshua J Vanlandingham (713) 515-3726 jjvanham@gmail.com

Chapter Commissioning Chair Mr David A MacLean (713)857-6499 david.maclean@mcmaccx.net

Chapter Grassroots Government Advocacy Chair Mr Keith H Reihl, PE (713)459-1044 reihl@swbell.net

Chapter Historian Mr Bruce L Flaniken, PE (832)473-1989 BLFlaniken@houstonmethodist.org

Chapter Honors and Awards Mr Robert (Alan) Neely (281)432-9864 alan.neely@owenscorning.com

Chapter Membership Promotion Chair Mr Jeffrey B Hunter (713)939-6098 jeffrey.hunter@carrier.utc.com

Chapter Membership Promotion Co-Chair Mrs Shannon Tawney Yancey (281)728-1624 syancey@grundfos.com

Chapter Membership Promotion Committee Member Mr Tim Navarro (281)253-5028 Tim.Navarro@Carrier.UTC.com

Chapter Membership Promotion Committee Member Miss Michelle K Baten (832)374-6845 michelle.k.baten@carrier.utc.com

Chapter Membership Promotion Committee Member Miss Thanh Huynh (814)528-4147 thanh.huynh@jacobs.com

PAOE Chair Mr David A Williams (713)208-8986 d12161950@yahoo.com

Chapter Refrigeration Mr Manuchehr Mehdizadeh (832) 660-5450 mmz@roxara.com

Chapter Research Promotion Chair Mr John G Neubauer (713) 871-8484 gneubauer@pagethink.com

Chapter Research Promotion Co-Chair Mr John W Walik (713) 668-8880 jwalik@hdgrant.com

Chapter Electronic Communications Chair Miss Teresa H. Norton (210) 687-9541 teresa.hy.norton@gmail.com

Chapter K-12 STEM Mr Terence P Connor (914)563-1678 terencepconnor@yahoo.com

Chapter Student Activities Chair Mr Jiajun "Francis" Liao, PhD, EIT (346) 339-7173 liaojiajun142857@hotmail.com

Chapter Student Activities Co-Chair Mr Elmer Whitehead (713) 348-6369 ew16@rice.edu

Chapter Sustainability Chair Mr Kapil Upadhyaya (713)426-7508 upadhyaykapil@gmail.com

Chapter Women in ASHRAE Chair Miss Lauren Ramos (713)783-7707 lramos4321@hotmail.com

Chapter Women in ASHRAE Co-Chair Catherine A Tinkler (713)203-9267 ctinkler27@gmail.com

Chapter YEA Co-Chair Ms Marisa Rae Kamstra marisa.kamstra@wsp.com

Chapter YEA Co-Chair Mr Nick Jansen (832)342-9276 nick.jansen@texasairsystems.com

Chapter Newsletter Editor Ms Julie A Thomet 9365230556 juliethomet@gmail.com

Chapter Webmaster Miss Teresa H. Norton (210) 687-9541 teresa.hy.norton@gmail.com