Volume 44, Issue 2 pp. 669-707
REVIEW PAPER

Review of latent thermal energy storage systems for solar air-conditioning systems

Yu Dong

Yu Dong

School of Building Services Science and Engineering, Xi'an University of Architecture and Technology, Xi'an, China

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Yanfeng Liu

Corresponding Author

Yanfeng Liu

Key Laboratory of Green Building in West China, Xi'an University of Architecture and Technology, Xi'an, China

Correspondence

Yanfeng Liu Key Laboratory of Green Building in West China, Xi'an University of Architecture and Technology, Xi'an, China.

Email: [email protected]

Dengjia Wang, School of Building Services Science and Engineering, Xi'an University of Architecture and Technology, Xi'an, China.

Email: [email protected]

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Dengjia Wang

Corresponding Author

Dengjia Wang

School of Building Services Science and Engineering, Xi'an University of Architecture and Technology, Xi'an, China

Correspondence

Yanfeng Liu Key Laboratory of Green Building in West China, Xi'an University of Architecture and Technology, Xi'an, China.

Email: [email protected]

Dengjia Wang, School of Building Services Science and Engineering, Xi'an University of Architecture and Technology, Xi'an, China.

Email: [email protected]

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Yingying Wang

Yingying Wang

Key Laboratory of Green Building in West China, Xi'an University of Architecture and Technology, Xi'an, China

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Hu Du

Hu Du

Welsh School of Architecture, Cardiff University, Cardiff, UK

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Jiaping Liu

Jiaping Liu

Key Laboratory of Green Building in West China, Xi'an University of Architecture and Technology, Xi'an, China

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First published: 20 November 2019
Citations: 22

Summary

Solar air conditioning is an important approach to satisfy the high demand for cooling given the global energy situation. The application of phase-change materials (PCMs) in a thermal storage system is a way to address temporary power problems of solar air-conditioning systems. This paper reviews the selection, strengthening, and application of PCMs and containers in latent thermal storage system for solar air-conditioning systems. The optimization of PCM container geometry is summarized and analyzed. The hybrid enhancement methods for PCMs and containers and the cost assessment of latent thermal storage system are discussed. The more effective heat transfer enhancement using PCMs was found to mainly involve micro-nano additives. Combinations of fins and nanoadditives, nanoparticles, and metal foam are the main hybrid strengthening method. However, the thermal storage effect of hybrid strengthening is not necessarily better than single strengthening. At the same time, the latent thermal storage unit has less application in the field of solar air-conditioning systems, especially regarding heat recovery, because of its cost and thermal storage time. The integration of latent thermal storage units and solar air-conditioning components, economic analysis of improvement technology, and quantitative studies on hybrid improvement are potential research directions in the future.

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