Energy, exergy, economic and environmental analysis of refrigerant charge in air source transcritical carbon dioxide heat pump water heater
作者： Yikai Wang , Zuliang Ye , Yulong Song , Xiang Yin , Feng Cao
DOI: 10.1016/J.ENCONMAN.2020.113209
关键词:
摘要: Abstract Currently, the air source transcritical carbon dioxide heat pump is extensively used for water heating. The refrigerant charge plays a significant role in optimizing system performance. However, most previous studies only focus on energy analysis. In this paper, an experiment was conducted and effect of evaluated with energy, exergy, economic environmental analyses. Results showed that optimal normalized 0.214 comprehensive important analysis, peak coefficient performance increased by up to 16.27% over other amounts, corresponding maximum heating capacity superheat 5.13 °C. exergy efficiency 34.17%, largest destruction observed evaporator, accounting 44.04–49.22% total. Compared direct electric heater, annual operating cost decreased 184.13 thousand Chinese yuan at optimum charge. Moreover, payback period lower than 1.0 years sensitive time as shown sensitivity reduction emissions reached value 378.01 tons charge, which profitable reducing greenhouse effect. Also, considering various conditions domestic hot load, well benefits applicability were presented.
sci-hub.st 参考文章(38)
Changhyun Baek, Jaehyeok Heo, Jongho Jung, Honghyun Cho, Yongchan Kim, Optimal control of the gas-cooler pressure of a CO2 heat pump using EEV opening and outdoor fan speed in the cooling mode International Journal of Refrigeration-revue Internationale Du Froid. ,vol. 36, pp. 1276- 1284 ,(2013) , 10.1016/J.IJREFRIG.2013.02.009
Shouguo Wang, Hanfei Tuo, Feng Cao, Ziwen Xing, Experimental investigation on air-source transcritical CO2 heat pump water heater system at a fixed water inlet temperature International Journal of Refrigeration-revue Internationale Du Froid. ,vol. 36, pp. 701- 716 ,(2013) , 10.1016/J.IJREFRIG.2012.10.011
Jung-Hoon Chae, Jong Min Choi, Evaluation of the impacts of high stage refrigerant charge on cascade heat pump performance Renewable Energy. ,vol. 79, pp. 66- 71 ,(2015) , 10.1016/J.RENENE.2014.07.042
Robert J. Moffat, Describing the Uncertainties in Experimental Results Experimental Thermal and Fluid Science. ,vol. 1, pp. 3- 17 ,(1988) , 10.1016/0894-1777(88)90043-X
Farivar Fazelpour, Tatiana Morosuk, Exergoeconomic analysis of carbon dioxide transcritical refrigeration machines International Journal of Refrigeration-revue Internationale Du Froid. ,vol. 38, pp. 128- 139 ,(2014) , 10.1016/J.IJREFRIG.2013.09.016
Danny S Parker, Research highlights from a large scale residential monitoring study in a hot climate Energy and Buildings. ,vol. 35, pp. 863- 876 ,(2003) , 10.1016/S0378-7788(02)00244-X
A.J. Heller, Heat-load modelling for large systems Applied Energy. ,vol. 72, pp. 371- 387 ,(2002) , 10.1016/S0306-2619(02)00020-X
Honghyun Cho, Changgi Ryu, Yongchan Kim, Ho Young Kim, Effects of refrigerant charge amount on the performance of a transcritical CO2 heat pump International Journal of Refrigeration-revue Internationale Du Froid. ,vol. 28, pp. 1266- 1273 ,(2005) , 10.1016/J.IJREFRIG.2005.09.011
Baomin Dai, Chaobin Dang, Minxia Li, Hua Tian, Yitai Ma, Thermodynamic performance assessment of carbon dioxide blends with low-global warming potential (GWP) working fluids for a heat pump water heater ☆ International Journal of Refrigeration-revue Internationale Du Froid. ,vol. 56, pp. 1- 14 ,(2015) , 10.1016/J.IJREFRIG.2014.11.009
C. Aprea, A. Greco, A. Maiorino, An experimental study on charge optimization of a trans-critical CO2 cycle International Journal of Environmental Science and Technology. ,vol. 12, pp. 1097- 1106 ,(2015) , 10.1007/S13762-014-0502-6