Title:	Effect of Low-Temperature Thermal Energy Storage on the Hybrid PV-compressed Air Energy Storage Operation
Author(s):	E. Bazdar, F. Nasiri, F. Haghighat
Keywords:	Hybrid, Performance, Operation strategy, Photovoltaic, Compressed Air Energy Storage
Topic:	Energy Transition – Integration, Storage, Sustainability, Policy, Economics, Energy Poverty, Society
Subtopic:	Energy System Integration; Storage
Event:	8th World Conference on Photovoltaic Energy Conversion
Session:	5DV.2.19
Pages:	1609 - 1616
ISBN:	3-936338-86-8
Paper DOI:	10.4229/WCPEC-82022-5DV.2.19
Price:	0,00 EUR
Document(s):	paper, poster

Abstract/Summary:

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Unlike conventional energy storage, compressed air energy storage (CAES) is a complex system mix of mechanical, electrical, and thermal engineering that causes relatively low efficiency due to multi-step energy conversion and losses. Energy in CAES is partly stored in the form of high-pressure air and partially converted into thermal energy. One way to improve the CAES cycle efficiency and reduce its carbon footprint is recycling the thermal energy by integrating regenerative heat units into CAES. Introducing decentralized CAES for building applications means that the compressor and turbine operation must be adjusted by intermittent solar power and fluctuated energy demand, respectively, to increase solar power penetration and building autonomy. In this study, a novel operation strategy is proposed to investigate the effect of limitation and dynamic behavior of thermal energy storage (TES) on the thermodynamic and techno-environmental performance of CAES and the whole hybrid power system, including PV/CAES/grid. This operation strategy enables the investigation of CAES and hybrid systems' time-dependent operation under several CAES structures characterized by heat management and fuel consumption concept. The results show a strong relationship between TES states with the turbine/compressor operation and the air tank state.