- Author
-
Brown, J. S.
|
Domanski, P. A.
- Title
- Fundamental Aspects of the Application of Carbon Dioxide in Comfort Cooling.
- Coporate
- Catholic University of America, Washington, DC
National Institute of Standards and Technology, Gaithersburg, MD
- Report
-
ICR0100,
- Book or Conf
- Refrigeration International Congress, 21st IIR. (IRC2003).Technical Session: B1-9 - A New Old Refrigerant: Carbon Dioxide - Components and Systems I. Proceedings. August 17-22, 2003,
Washington, DC,
2004
- Keywords
-
carbon dioxide
|
comfort
|
cooling
|
refrigerants
|
refrigeration
|
evaporators
|
entropy
- Identifiers
- evaporator entropy generation; compressor entropy generation; condenser/gas cooler entropy generation; entropy generation for expansion device and LLSL-Hx
- Abstract
- This paper presents entropy generation analyses for the evaporator, compressor, gas cooler, expansion device and liquid-line suction-line heat exchanger for a transcritical carbon dioxide cycle for automotive and residential air-conditioning systems, and presents entropy generation analyses for the evaporator, compressor, condenser, and expansion device for a subcritical R134a automotive air-conditioning system and a subcritical R22 residential air-conditioning system. The analyses show that the CO2 automotive air-conditioning system generates 36% more entropy than the R134a automotive air-conditioning system, and that the CO2 residential air-conditioning system generates 63% more entropy than the R22 residential air-conditioning system. The biggest contributors to the lower CO2 performance are the heat rejection process and the expansion related processes.