Abstract
A single cylinder rotary compressor was applied in the refrigerant injection air-source heat pump to improve the heating performance in cold regions. In this study, the performance of an R410A single cylinder rotary compressor vapor injection (SCRCVI) system was measured and analyzed by varying the compressor frequency f and injection pressure Pinj at the ambient temperature Tod=–10°C.The experimental results indicated that an optimum injection pressure to gain the maximum COPh (coefficient of performance) existed in the SCRCVI cycle. However, the maximum COPh of the SCRCVI system decreased as the increase of the frequency, and the maximum COPh was even lower than that of the CSVC system at high compressor frequency. Therefore, in view of the energy saving and emission reduction, the SCRCVI system should be switched to single stage compression system when the heating capacity demand could be satisfied at high compressor frequency f. Compared to the conventional single-stage vapor compression (CSVC) system, refrigerant injection could enhance the heating capacities and COPh by 28.2% and 7.91%, respectively. The average total mass flow rate of the SCRCVI system was 24.68% higher than that of the CSVC system. As the SCRCVI system worked at the optimum injection pressure, the variation trends of the different system parameters were investigated in detail. These trends were reliably used to optimize the refrigerant injection system design and the control strategy. The parameter of (Pinj–Ps) could be adopted as the signals to control the opening of the upper stage electronic expansion valve EEV1.
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References
Heo J, Jeong M W, Baek C, et al. Comparison of the heating performance of air-source heat pumps using various types of refrigerant injection. Int J Refrigeration, 2011, 34: 444–453
Xu X, Hwang Y, Radermacher R. Refrigerant injection for heat pumping/air conditioning systems: Literature review and challenges discussions. Int J Refrigeration, 2011, 34: 402–415
Xu S X, Ma G Y. Air-source heat pump coupled with economized vapor injection scroll compressor and ejector: Design and experimental research. Sci China Tech Sci, 2010, 53: 782–788
Banister C J, Collins M R. Development and performance of a dual tank solar-assisted heat pump system. Appl Energy, 2015, 149: 125–132
Lv X, Yan G, Yu J. Solar-assisted auto-cascade heat pump cycle with zeotropic mixture R32/R290 for small water heaters. Renew Energy, 2015, 76: 167–172
Boahen S, Choi J M. Research trend of cascade heat pumps. Sci China Tech Sci, 2017, 60: 1597–1615
Lazzarin R, Noro M. Experimental comparison of electronic and thermostatic expansion valves performances in an air conditioning plant. Int J Refrigeration, 2008, 31: 113–118
Chen Z S, Tao W Q, Zhu Y W, et al. Performance analysis of air-water dual source heat pump water heater with heat recovery. Sci China Tech Sci, 2012, 55: 2148–2156
Song J, Lee K, Jeong Y, et al. Heating performance of a ground source heat pump system installed in a school building. Sci China Tech Sci, 2010, 53: 80–84
Adhikari R S, Aste N, Manfren M, et al. Energy savings through variable speed compressor heat pump systems. Energy Procedia, 2012, 14: 1337–1342
Qiao H, Aute V, Radermacher R. Transient modeling of a flash tank vapor injection heat pump system–Part I: Model development. Int J Refrigeration, 2015, 49: 169–182
Qiao H, Xu X, Aute V, et al. Transient modeling of a flash tank vapor injection heat pump system–Part II: Simulation results and experimental validation. Int J Refrigeration, 2015, 49: 183–194
Qiao H, Aute V, Radermacher R. Dynamic modeling and characteristic analysis of a two-stage vapor injection heat pump system under frosting conditions. Int J Refrigeration, 2017, 84: 181–197
Redón A, Navarro-Peris E, Pitarch M, et al. Analysis and optimization of subcritical two-stage vapor injection heat pump systems. Appl Energy, 2014, 124: 231–240
Wang B, Shi W, Han L, et al. Optimization of refrigeration system with gas-injected scroll compressor. Int J Refrigeration, 2009, 32: 1544–1554
Wang B, Li X, Shi W. A general geometrical model of scroll compressors based on discretional initial angles of involute. Int J Refrigeration, 2005, 28: 958–966
Wang B, Shi W, Li X, et al. Numerical research on the scroll compressor with refrigeration injection. Appl Thermal Eng, 2008, 28: 440–449
Wang B, Shi W, Li X. Numerical analysis on the effects of refrigerant injection on the scroll compressor. Appl Thermal Eng, 2009, 29: 37–46
Park Y C, Kim Y, Cho H. Thermodynamic analysis on the performance of a variable speed scroll compressor with refrigerant injection. Int J Refrigeration, 2002, 25: 1072–1082
Cho I Y, Bin Ko S, Kim Y. Optimization of injection holes in symmetric and asymmetric scroll compressors with vapor injection. Int J Refrigeration, 2012, 35: 850–860
Dardenne L, Fraccari E, Maggioni A, et al. Semi-empirical modelling of a variable speed scroll compressor with vapour injection. Int J Refrigeration, 2015, 54: 76–87
Heo J, Jeong M W, Kim Y. Effects of flash tank vapor injection on the heating performance of an inverter-driven heat pump for cold regions. Int J Refrigeration, 2010, 33: 848–855
Wang X, Hwang Y, Radermacher R. Two-stage heat pump system with vapor-injected scroll compressor using R410A as a refrigerant. Int J Refrigeration, 2009, 32: 1442–1451
Ma G Y, Zhao H X. Experimental study of a heat pump system with flash-tank coupled with scroll compressor. Energy Buildings, 2008, 40: 697–701
Xu X, Hwang Y, Radermacher R. Transient and steady-state experimental investigation of flash tank vapor injection heat pump cycle control strategy. Int J Refrigeration, 2011, 34: 1922–1933
Xu X, Hwang Y, Radermacher R. Performance comparison of R410A and R32 in vapor injection cycles. Int J Refrigeration, 2013, 36: 892–903
Baek C, Lee E, Kang H, et al. Experimental Study on the heating performance of a CO2 heat pump with gas injection. In: Proceedings of International Refrigeration and Air Conditioning Conference. West Lafayette: Purdue University, 2008
Baek C, Heo J, Jung J, et al. Effects of vapor injection techniques on the heating performance of a CO2 heat pump at low ambient temperatures. Int J Refrigeration, 2014, 43: 26–35
Jia Q, Feng L, Yan G. Experimental research on heating performance of rotary compression system with vapor injection (in Chinese). J Refrigeration, 2015, 36: 65–70
Jia Q, Feng L, Yan G. Experimental research on rotary compression system with vapor injection (in Chinese). Refrigeration Air-Cond, 2014, 14: 128–141
Wang B, Liu X, Shi W. Comparative research on air conditioner with gas-injected rotary compressor through injection port on blade. Appl Thermal Eng, 2016, 106: 67–75
Liu X, Wang B, Shi W, et al. A novel vapor injection structure on the blade of a rotary compressor. Appl Thermal Eng, 2016, 100: 1219–1228
Wang B, Liu X, Shi W. Performance improvement of air source heat pump using gas-injected rotary compressor through port on blade. Int J Refrigeration, 2017, 73: 91–98
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Sun, J., Zhu, D., Yin, Y. et al. Experimental research on the heating performance of a single cylinder refrigerant injection rotary compressor heat pump with flash tank. Sci. China Technol. Sci. 61, 1814–1823 (2018). https://doi.org/10.1007/s11431-017-9237-6
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DOI: https://doi.org/10.1007/s11431-017-9237-6