Future Aspect of Refrigerants: Considering Thermophysical Properties and Cycle Performance

다국어 초록 (Multilingual Abstract)

Refrigeration, air conditioning and heat pump equipments (generally known as heat pumps) are very important for the civilized society. However, discharged refrigerants from heat pumps and exhausted carbon dioxide to drive heat pumps result in serious environmental problems. For this reason, fluorocarbon refrigerants are limited or regulated. To alleviate the problems, new refrigerants with lower GWP and higher cycle performance must be developed and used. In this paper, calculated thermophysical properties of hydrofluoroolefin refrigerants using databases are evaluated with experimental data. Then, the fundamental cycle performance of air conditioning by using major refrigerants is studied based on their thermophysical properties. The results show that there is no adequate refrigerant for air conditioning applications. Heat pumps with new refrigerants including refrigerant mixtures must be developed as fast as possible. It leads to that HFC refrigerants must be used taking care until the new refrigerants will be available.

참고문헌 (Reference)

1 IPCC/TEAP, "Safe guarding the ozone layer and the global climate system. Issues related to HFCs and PFCs" Kenbridge University Press 2005

2 JSRAE, "Reito Kucho Binran, Vol. 1"

3 I.I.R., "Refrigeration and the Greenhouse Effect: GWP, TEWI, or COP?" 1995

4 M. Katakura, "Refrigerant management system, for mitigating global warming" 2011

5 R. Hulse, "Physical properties of HFO-1234yf" 2009

6 A. J. Grebenkov, "Physical properties and equation of state for trans- 1, 3, 3, 3-tetrafluoropropene" 2009

7 E. W. Lemmon, "NIST Standard Reference Database 23: Reference Fluid Thermodynamic and Transport Properties- REFPROP, Version 9.0"

8 N. Kagawa, "Measurement of isobaric heat capacity of gaseous trans-1, 3, 3, 3-tetrafluoropropene (HFO 1234ze)" 28 : 71-76, 2011

9 JSRAE, "JARef HFO-1234ze(E), Vol.4, ver.1"

10 JSRAE, "JARef HFO-1234yf, Vol.3, ver.1"

11 K. Yamaya, "Isochoric speci¯c heat capacity of trans- 1, 3, 3, 3-tetrafluoropropene (HFO-1234ze(E)) and the HFO-1234ze(E) þ CO2 mixture in the liquid phase" 56 : 1535-1539, 2011

12 A.Matsuguchi, "Development of a compact torsionally oscillating crystal viscometer and viscosity measurements of liquid propane" 2007