JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Heating Performance Characteristics of Heat Pump with VI cycle using Re-Heater and Solar-Assisted
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Heating Performance Characteristics of Heat Pump with VI cycle using Re-Heater and Solar-Assisted
Lee, Jin-Kook; Choi, Kwang-Hwan;
  PDF(new window)
 Abstract
In this study, heating performance of the air-cooled heat pump with vapor-injection (VI) cycles, re-heater and solar heat storage tank was investigated experimentally. Devices used in the experiment were comprised of a VI compressor, re-heater, economizer, variable evaporator, flat-plate solar collector for hot water, thermal storage tank, etc. As working fluid, refrigerant R410A for heat pump and propylene glycol (PG) for solar collector were used. In this experiment, heating performance was compared by three cycles, A, B and C. In case of Cycle B, heat exchange was conducted between VI suction refrigerant and inlet refrigerant of condenser by re-heater (Re-heater in Fig. 3, No. 3) (Cycle B), and Cycle A was not use re-heater on the same operating conditions. In case of Cycle C, outlet refrigerant from evaporator go to thermal storage tank for getting a thermal energy from solar thermal storage tank while re-heater also used. As a result, Cycle C reached the target temperature of water in a shorter time than Cycle B and Cycle A. In addition, it was founded that, as for the coefficient of heating performance(), the performance in Cycle C was improved by 13.6% higher than the performance of Cycle B shown the average of 3.0 and by 18.9% higher than the performance of Cycle A shown the average of 2.86. From this results, It was confirmed that the performance of heat pump system with refrigerant re-heater and VI cycle can be improved by applying solar thermal energy as an auxiliary heat source.
 Keywords
Vapor-injection cycle;Heat pump system;Coefficient of heating performance;Flat plate solar collector;
 Language
Korean
 Cited by
 References
1.
S.W. Cho, Development of Commercial Heat Pump system for Medium and Large Size, The Magazine of the Society of Air-conditioning and Refrigerating Engineers of Korea, Vol.41 No.10, pp.27-28, 2012.

2.
N.C. Baeck, J.U. Park, B.H. Song, J.K. Lee and H.J. Kim, Simulation of Solar and Ambient-air-assisted Heat Pump, Journal of the Korean Solar Energy Society, Vol.20, No.4, pp.17-24, 2000.

3.
N.C. Baeck, J.K. Lee and B.H. Song, Performance of Dual Source Heat Pump System with Solar-Assisted Evaporater, Proceedings of the Summer Annual Conference of The Society of Air-conditioning and Refrigerating Engineers of Korea, pp.1334-1338, 2001.

4.
N.C. Baeck, Heat Pump System with Solar Energy as Heat Source, Journal of the Korean Association of Air conditioning Refrigerating and Sanitary Engineers, Vol.21, No.2, pp.75-82, 2004.

5.
Y.C. Park, J.Y. Kim and G.S. Ko, A Study of Performance Characteristics on Hybrid Heat Pump System with Solar Energy as Heat Source, Journal of the Korean Solar Energy Society, Vol.27, No.1, pp.47-54, 2007.

6.
B.H. Song, An Experimental Study for the Design and Performance Analysis of Cooling and Water Heater Heat Pump system with Thermal Storage Tank, a mater's thesis, Department of Mechanical Engineering, Sogang University, Republic of Korea, 2002

7.
Y.H. Kim, Performance of water-water heat pump with direct contact heat exchanger, a master's thesis, Department of Bioengineering, Sungkyunkwan University, Republic of Korea, 2011

8.
J.T. Park and K.C. Chang, Present and Future of Heating and Cooling system using Seawater, Korea Journal of geothermal energy, Vol.3, No.1, pp.38-50, 2007.

9.
W.J. Kim, Performance of HFC32/HFC125 Mixtures for Heat Pumps, Proceedings of the Summer Annual Conference of The Society of Air-conditioning and Refrigerating Engineers of Korea, pp.141-148, 2011.

10.
C.W. Roh and M.S. Kim, Effect of intermediate Pressure on the Heating Performance of a Heat Pump System using R410A Vapor-Injection Technique, Proceedings of the Summer Annual Conference of The Society of Air-conditioning and Refrigerating Engineers of Korea, pp. 137-140, 2011.

11.
J.K. Kim, H.K. Oh, C.H. Son, K.W. Suh, K.H. Bahng and D.W. Kim "Heat pump system with renewable energy", Korea, Patent 10-1177430, August 21, 2012