Simulations and Experiments on A Solar-Assisted Heat Pump Water Heater-Comparisons between R290 and R22
作者单位：上海交通大学
学位级别：硕士
导师姓名：Yanjun Dai;Trygve M.Eikevik
授予年度：2016年
学科分类：080703[工学-动力机械及工程] 08[工学] 0807[工学-动力工程及工程热物理]
摘 要：As a larger share of the world population is gaining a higher living standard and a higher energy consumption,it is increasingly important to find new,better,and more efficienct ways to meet our energy demands.A solar-assisted heat pump water heater is one way to efficiently use solar energy to produce hot water for dometic *** are currently few commercial applications of this technology and it has remained an idea since it was first porposed in *** assisted heat pump can achive elevated evaporator temperature compared to a air-source heat pump and be more efficient when solar radiation is *** also has the advatage of using a refrigerant as fluid and not water and problemes related to frost is *** thesis presents a the results from an experiment conducted on a Solar-Assisted Heat Pump Water Heater using R22 as working ***,a simulation model was built that could load the weather data from experiment and perform a simulation using a refrigerant of *** refrigerant data was loaded from the NIST Refprop database into a SIMULINK/Matlab *** this thesis,the simulation compared R22 and R290 as *** overall COP for the experiment was 3.39 under overcast conditions and 3.29 under sunny *** simulation predicted a COP of 4.69 and 4.47 for R290 and R22,respectively,under sunny *** simulation model was not validated and it is believed that the refrigerant charge of R22 was too low during *** is proposed to better and more targeted research of SAHPs by having a test rig where different key components can easily be changed and it is easy to evaluate *** it is suggested to research SAHP specify operation conditions for SAHPs and how to make it possible for SAHPs to outperform other heating *** should also be developed with natural refrigerants in mind.
同方学位论文库