Investigation of an innovative PV/T-ORC system using amorphous silicon solar cells and evacuated flat plate collectors:a comparison study

摘要：

　　Solar-driven organic Rankine cycle(s-ORC)is promising technology with flexible operation capacity and storage ability(adjustable output and night operation)to meet domestic userselectricity demands.However,this technology suffers from low efficiency.Beside the s-ORC,photovoltaics use semi-conductors to convert solar radiation directly into electricity.This direct conversion efficiency is about 5 to 25%in applications.Moreover,the rest of the collected solar energy can be converted into useful thermal energy by using photovoltaic thermal(PV/T)collectors.However,PV/T systems cannot produce electricity at night time.Therefore,in this study,s-ORC,stand-alone PV and PV/T-ORC systems are analysed and their performances are compared.The s-ORC is driven by evacuated flat plate(EFP)collectors and sensible heat storage unit is implemented to produce smooth generation and maintain heat for the ORC during the night time period.By using amorphous silicon(a-Si)and polycrystalline silicon(poly-Si)cells,EFP collectors are converted into PV/T collectors.These PV/T collectors are replaced with EFP collectors in the s-ORC and PV/T-ORC systems are implemented.It is the first time the EFP collector has been used for PV/T application because EFP is very expensive.However,it will benefit from the use of PV cells to increase its annual yield.Related mathematical models are built and presented in the paper.Transient daily analysis is conducted for two weather data and results are compared for aforementioned systems.Combining PV/T collectors with the ORC gives better performance than stand-alone PV and s-ORC.For summer applications,a-Si based system shows the best performance over other compared systems.

关键词： Solar ORC PVT sensible heat storage a-Si and poly-Si cells

作者: Cagri KUTLU Jing LI Yuehong SU Yubo WANG Gang PEI Saffa RIFFAT

作者单位: Department of Architecture and Built Environment,University of Nottingham,University Park,Nottingham Department of Architecture and Built Environment,University of Nottingham,University Park,Nottingham School of Economics and Management,Hubei University of Technology,Wuhan,Hubei,430068,China Department of Thermal Science and Energy Engineering,University of Science and Technology of China,9

会议类型: 国际会议

会议名称: The 17th International Conference on Sustainable Energy Technologies(SET2018)(第17届可持续能源技术国际会议暨2018世界著名科学家来鄂讲学武汉论坛)

会议地点: 武汉

会议语种:英文

页码: 37-44

在线出版日期: 2018-08-21（万方平台首次上网日期，不代表论文的发表时间）