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Numerical research on building energy balance and grid stability realization of PV/T-ASHP system through electrical-hydrogen coupled storage technology

Yijun Fu, Zhichao Wang, Xiaofeng Li, Wei Xu, Ce Xu, Hao Li, Weihua Lyu and Chunling Wu

Energy, 2024, vol. 307, issue C

Abstract: Photovoltaic-thermal collector compounded air source heat pump (PV/T-ASHP) systems are increasingly adopted in the zero-carbon building industry. However, challenges persist due to system instability and seasonal grid fluctuations stemming from conventional storage technologies. To address these gaps, the cross-seasonal electrical-hydrogen coupled storage (EHCS) technology was implemented into a conventional PV/T-ASHP system in TRNSYS, applied to a typical residential building. A closed-loop energy utilization strategy is proposed, optimizing the supply, consumption, and storage of multiple energy forms including electrical, thermal and hydrogen energy. TRNSYS simulation results demonstrate that the PV/T-ASHP-EHCS system can achieve monthly energy balance, boost surplus renewable energy consumption, improve system electrical and thermal efficiency, and ensure instantaneous grid stability. Compared to conventional PV/T-ASHP system, in all climatic zones, OEE and OTE in transitional seasons increase to 50 %∼100 % and 30 %–45 %, respectively. EPR exhibits a more stable trend with lower fluctuation, while TPR in winter increases to 10 %∼20 %. Furthermore, hourly instantaneous and monthly total grid power fluctuations can be controlled within 0.2 kW–0.5 kW and 50 kWh∼100 kWh respectively, which are merely 10 % of conventional PV/T-ASHP system, indicating effective system stability and independence. The established EHCS system sets a paradigm for ideal energy management practices in future hybrid renewable energy systems.

Keywords: PV/T-ASHP system; EHCS technology; TRNSYS simulation; Cross-seasonal energy storage; Grid stability (search for similar items in EconPapers)
Date: 2024
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:307:y:2024:i:c:s0360544224024502

DOI: 10.1016/j.energy.2024.132676

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