High Efficiency R744 Centrifugal Chiller

Award Information
Agency: Department of Energy
Branch: N/A
Contract: DE-FG02-09ER85352
Agency Tracking Number: 90219
Amount: $99,996.00
Phase: Phase I
Program: SBIR
Awards Year: 2009
Solicitation Year: 2010
Solicitation Topic Code: 11 b
Solicitation Number: DE-FOA-0000350
Small Business Information
R&d Dynamics Corporation
15 Barber Pond Road, Bloomfield, CT, 06002
DUNS: 798021085
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Giri Agrawal
 Dr.
 (860) 726-1204
 AGRAGIRI@RDDYNAMICS.COM
Business Contact
 Dennis Burr
Title: Mr.
Phone: (860) 726-1204
Email: DENNISB@RDDYNAMICS.COM
Research Institution
N/A
Abstract
Most medium and large commercial and industrial facilities use packaged water chillers of 50 ton capacity and higher for air conditioning and refrigeration. The current refrigerants used are HFC-134a or HCFC-123, which need to be replaced by an environmentally benign alternative that offers zero ozone-depletion and negligible global warming. Among all candidate refrigerants, R744 (carbon dioxide) has been found to be the best, taking into account all requirements, including non-flammability and non-toxicity. However, due to R744¿s inherent inefficiency, a direct application to the conventional chiller cycle requires high power consumption, .2 kW/ton, which is far higher than the ASHRAE recommended value of 0.576 kW/ton. This project will develop a high-efficiency R744 chiller cycle. In Phase I, the feasibility of the innovative R744 chiller concept will be confirmed through a thermodynamic analysis. In Phase II, a prototype will be fabricated and tested to confirm the high-efficiency target. In Phase III, a prototype package of 150 ton capacity will be built and field tested. Commercial Applications and other Benefits as described by the awardee: The high-efficiency R744 chiller initially will be marketed by targeting the replacement of existing reciprocating and screw chillers in commercial and industrial sectors ranging from 50 to 400 tons of cooling capacity.

* information listed above is at the time of submission.

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