Energy and Built Environment

https://www.sciencedirect.com/journal/energy-and-built-environment/vol/1/issue/1Volume 1,Issue 1,Pages 1-130(January 2020)(1)Simulation study on performance of a dual-source hybrid heat pump unit with alternative refrigerants,by Chenguang Bai,Zongwei Han,Haotian Wei,Xiaomei Ju,Xinwei Meng,Qi Fu,doi.org/10.1016/j.enbenv.2019.08.004Abstract:To solve the problems of single heat source heat pump systems in severe cold regions,a dual-source hybrid heat pump unit(DSHHPU)is proposed.The mathematical models of the DSHHPU w hen charging R134a or its alternative refrigerants R32,R290 and R600a w ere established respectively.