Performance Analysis of Heat Pump Cycle with an Expander

Abstract:

A simulation investigation have been carried out to research the relationships between rejection pressure and related operating parameters and the performance of a heat pump cycle with an expander (HPCE) respectively using CO2 and R134a as refrigerant. With the increase of exhaust pressure, the CO2 cycle has an optimum rejection pressure that is 8.667MPa, and the maximal COP is 4.189, in addition, R134a cycle is a reducing trend. When the Condensing temperature of compressor is gradually increasing, the performances of CO2 cycles gradually decline, but the R134a cycle just has small changes. With the increasing of evaporating temperature, the performances of all cycles are an increasing trend.

• Periodical: Applied Mechanics and Materials (Volumes 411-414)
• Pages: 3006-3009
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.411-414.3006
• Online since: September 2013
• Authors: Gui Jun Xue, Da Wei Liang, Guang Da Liu, Shui Qing Li, Zhen Jiang Zhou, Fang Xu, Yun Wang Ye
• Keywords: CO2, COP, Heat Pump, HPCE, R134a, Refrigerant

References

[1] Hongli Wang; Yitai Ma; Jingrui Tian; Minxia Li. Theoretical analysis and experimental research on transcritical CO2 two stage compression cycle with two gas coolers (TSCC+TG) and the cycle with intercooler (TSCC+IC). Energy Conversion and Management, 2011, 52(8-9): 2819-2828.

DOI: 10.1016/j.enconman.2011.02.003

[2] Arzu Şencan Şahin. Performance analysis of single-stage refrigeration system with internal heat exchanger using neural network and neuro-fuzzy. Renewable Energy, 2011, 36(10): 2747-2752.

DOI: 10.1016/j.renene.2011.03.009

[3] T Hirao, H Mizukami, M Takeuchi, et al. Development of Air Conditioning System Using CO2 for Automobile. In: The Proceedings of the 4th ⅡR-Gustav Lorentzen Conference on Natural Working Fluids. Purdue: Purdue University, 2000. 193-200.

[4] Junlan Yang, Yi Tai Ma, Min Xia Li, Hai Qing Guan. Exergy analysis of transcritical carbon dioxide refrigeration cycle with an expander. Energy, 2005, 30: 1162-1175.

DOI: 10.1016/j.energy.2004.08.007

[5] JAMES M. CALM, Resource ozone and global warming implications of refrigerant selection for large chillers, In: Proceedings of the 22nd International Congress of Refrigeration, Beijing, 2007, pp.1-9.

[6] Guan Haiqing, Ma Yitai, Li Minxia, Yang Junlan. CO2 rolling piston expansion design and performance test [J]. Refrigeration and air conditioning, machine 2004, 4 (3).