Geothermal Heat Pump and Energy Recovery Applications
ASHRAE Technical Committee 6.8

2023 ASHRAE Winter Conference

February 4–8, 2023
Atlanta, GA
Register at ashrae.org/2023winter

ASHRAE is looking forward to returning to Atlanta – home of the new ASHRAE Global Headquarters.

The ASHRAE Winter Conference will be held February 4-8, 2023, at the Omni Hotel at CNN Center

and Building A of the Georgia World Congress Center. The AHR Expo is February 6-8 in Buildings B

and C of the Georgia World Congress Center. Your ASHRAE Winter Conference Badge provides

FREE entrance the AHR Expo.

Learn more about the Show and plan your experience while there at ahrexpo.com.

TC 6.8 Research Subcommittee

Wednesday, January 18 

1:00 PM – 2:30 PM EST

Virtual

Chair: Harrison Skye

Session Type: Technical Committee (TC, MTG, TG, TRG) Meeting Format: Virtual

This meeting will take virtually. Virtual attendees can click "Enter Meeting" under Resources below

to join the meeting on the noted date and time.

https://www.ashrae.org/conferences/2023-winter-conference-atlanta
-Select "Schedule"
-Find the TC 6.8 Research Subcommittee
-Under Resources, select "Enter Meeting"

Through WebEx:
2331 533 8314
Password:
3xMKH6MGiy7
Host key:
110124
Join by video system
Dial 23315338314@ashrae.webex.com
You can also dial 173.243.2.68 and enter your meeting number.
Join by phone
18662994153 United States of America Toll Free
+14702385742 US Toll
Access code: 2331 533 8314
Host PIN: 8291

TC 6.8 Energy Recovery Subcommittee

Friday, January 20 11:00 AM – 12:00 PM EST

WebEx

Session Type: Technical Committee (TC, MTG, TG, TRG) Meeting Format: Virtual

This meeting will take place virtual.

Chair: MIke Filler

Click the "enter meeting" link below to join.

https://events.rdmobile.com/Asset/Download/11018818

meeting number: 2344 331 3566

Join by video system

Dial 23443313566@ashrae.webex.com

You can also dial 173.243.2.68 and enter your meeting number

Join by phone

18662994153 United States of America Toll Free

+14702385742 US Toll

Access code: 2344 331 3566

TC 6.8 Programs & Education Subcommittee

Sunday, February 5 

4:00 PM – 6:00 PM EST

Omni CNN Center Atlanta, Dogwood B (M1-North)

Session Type: Technical Committee (TC, MTG, TG, TRG) Meeting Format: In Person

Chair: Roshan Revankar

TC 6.8 Ground-Source Heat Pumps and Energy Recovery

Tuesday, February 7 

3:00 PM – 5:00 PM EST

Omni CNN Center Atlanta, Maple A (A-South)

Session Type: Technical Committee (TC, MTG, TG, TRG) Meeting Format: In Person

Chair: Howard Newton

Seminar 35: Presentation 1: A New Era in Direct Exchange Geothermal: Advancements,

Advantages, and Common Myths, and Future Potential

Monday, February 6 

11:00 AM – 11:20 AM EST

Georgia World Congress Center, A404

A New Era in Direct Exchange Geothermal: Advancements, Advantages, and Common Myths,

and Future Potential
Presenting Author: Bill Buschur, Total Green Mfg, Saint Henry, OH, USA

Direct exchange (DX) geothermal systems are growing in popularity, as they are potentially the

most efficient geothermal systems available. In the early years, numerous operational and design

issues have plagued the DX geothermal systems. This seminar discusses how the advancements

in the technology over the years has not only overcame the concerns of the past, but has emerged

as an industry leader. Now this technology is leading the way in system capacities, energy

efficiency, and many design advantages, and definitely provides the contractor with many selling

and efficiency advantages when compared to other ground source heat pumps.

Seminar 35: Presentation 2: Heating Cooling Solutions Using the Natural Refrigerant Carbon

Dioxide

Monday, February 6 

11:20 AM – 11:40 AM EST

Georgia World Congress Center, A404

Heating Cooling Solutions Using the Natural Refrigerant Carbon Dioxide
Presenting Author: Marc Portnoff, Thar Energy, LLC, Pittsburgh,, PA, USA

The Thar Brand (Thar) is a recognized leader in commercializing supercritical carbon dioxide (sCO2)

technology for use in industrial and research settings. This includes developing components and

systems using CO2 as a natural heat pump refrigerant, also known as R744.

Thar was the first to establish a commercial scale, direct exchange, geothermal, heating and cooling,

heat pump system using R744. R744 is not only an environmentally exceptional refrigerant, but it has

beneficial refrigerant properties for geothermal applications. Basics of transcritical CO2.

Seminar 35: Presentation 3: Solutions Using the Natural Refrigerant Carbon Dioxide

Monday, February 6 

11:40 AM – 12:00 PM EST

Georgia World Congress Center, A404

Solutions Using the Natural Refrigerant Carbon Dioxide
Presenting Author: Parham Eslami-Nejad, Ph.D., Research Scientist at CanmetENERGY-Varennes,

Varennes, QC, Canada

Parham will be apart of the Heating Cooling Solutions using the natural refrigerant carbon dioxide

presentation.

Over the last decade, several studies have been conducted to replace synthetic refrigerants with

natural ones. Among the candidates, CO2 has been attracting more attention due to being

environmentally benign and safe together with superior heat transfer characteristics. This seminar

presents information on a new and exciting direct exchange test lab that the Canadian government 

has invested in along with a short update on a 15 ton commercial DX project they are also involved

with.