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.
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