Theoretical Analysis on Novel Scheme of Solar Heat Pump under High Temperature Conditions
Compared to other forms of renewable energy utilization technology, solar assisted heat pump system has a higher system efficiency and minimum damage to the environment，but the problem of efficient operation and difficulties of design has been brought from the extremely complex running condition by the instabilities of solar energy. The paper analyzes the relationship between evaporator temperature, solar radiation intensity, capacity of solar collector, atmospheric temperature and situation of heat transfer, as well as the performance of solar assisted heat pump under a serial of abnormal working conditions, including the unstable operation conditions of compressor, system efficiency depression and compressor life decrease in high environment temperature or intense solar radiation, Clarify the evaporate temperature’s effects on the efficiency of solar collector and efficiency of water heater heat pump system. Through analysis of the heat transfer process, system optimization and temperature distribution identify in series of core positions, a novel construction of solar heat pump was proposed to reduce the discharge temperature of compressor by change the structure of absorb pipe and exhaust pipe to avoid the system complication or energy waste. The theoretical analysis result shows that the system operation stability and COP are increased, the problem of energy waste and compressor damage cause of the frequently start/stop in high temperature are finally solved. Meanwhile, the thermal energy of solar radiation during high temperature section is fully used, and stability of the system and energy efficiency is greatly improved.
Solar heat pump working temperature operation conditions thermodynamic optimization
Hong Qin Chenchen Xiong Xiaofan Jin
Faculty of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, China Faculty of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, China
国际会议
4th International Symposium on Heat Transfer and Energy Conservation(第四届传热与节能国际研讨会 ISHTEC2012)
广州
英文
1-4
2012-01-06（万方平台首次上网日期，不代表论文的发表时间）