Compressor-assisted thermochemical sorption integrated with solar photovoltaic-thermal collector for seasonal solar thermal energy storage

被引:11
作者
Thinsurat K. [1 ]
Ma Z. [2 ]
Roskilly A.P. [2 ]
Bao H. [2 ]
机构
[1] Walailak University, School of Engineering and Technology, Nakhon Si Thammarat
[2] Durham University, Department of Engineering, Durham
来源
Energy Conversion and Management: X | 2022年 / 15卷
基金
英国工程与自然科学研究理事会;
关键词
Domestic hot water; Photovoltaic-thermal collector; Seasonal energy storage; Solar energy; Space heating; Thermochemical sorption;
D O I
10.1016/j.ecmx.2022.100248
中图分类号
学科分类号
摘要
This paper studied the performance of a compressor-assisted thermochemical sorption energy storage (CATSES) system with a solar photovoltaic-thermal collector (PV/T) to support the domestic space and hot water heating. The heat from the PV/T drives endothermic desorption, whilst the electricity from the PV/T powers the compressor to assist the low-temperature desorption. The main aim of this study was to demonstrate that the integrated system can flexibly and maximally utilise solar energy, and store solar energy in a high energy–density system with minimum loss over long-term storage. The parametric investigation on the CATSES system using SrCl2/NH3 working pair was conducted for a case study in the city of Newcastle upon Tyne in the UK, which has long wintertime with high heating demand. Two different system operation modes (Case 1 and Case 2) with different strategies of solar energy usage (direct usage / storage) were studied. By using 30 m2 PV/T collector with the CATSES reactor that contains 22 m3 (450 kg/m3) composite adsorbent and a compressor with 11.5 compression ratio, the system that operated Case 1 could achieve 100% solar fraction of annual heating demand. The achieved material-based energy storage density was around 0.6 GJ/m3 and the storage efficiency was 0.88 with the net electricity consumption of 180 kWh (around 5% average consumption of an ordinary UK household). The system that operated Case 2 stored less heat than that of the Case 1 but was able to output more electricity. © 2022 The Author(s)
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