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Research on the Phase Change Solar Energy Fresh Air Thermal Storage System



Author(s)

Guohui Feng¹, Lei Zhao¹, Yingchao Fei¹ and Kailiang Huang²

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DOI:10.17265/1934-8975/2014.02.004

1. School of Municipal and Environmental Engineering, Shenyang Jianzhu University, Shenyang 110168, China
2. Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400030, China

In this article, a new kind of solar fresh air system is designed in order to realize the improvement of thermal efficiency by the integrated application of the PCMs and heat pipe technology. Under the adequate sunshine condition, the fresh air is directly delivered into the indoor environment after being heated by the solar collector. When the sun radiation is reduced, the heated air temperature can not satisfy the need of supply of air temperature.The main heat source is changed to phase change heat storage equipment instead of solar energy. The system adopt heat pipe for a high-efficiency and isothermal heat transfer which recover the shortcomings of PCMs such as: low coefficient of thermal conductivity and poor thermal efficiency. This article establishes the physical model of phase change solar energy fresh air thermal storage system and creates the mathematical model of its unsteady heat transfer to simulate and analyse the operation process by using Fluent software. The results of the study show that, compared to normal fresh air system, the phase change solar energy fresh air thermal storage system has a significant improvement in energy saving and indoor comfort level and will play an important role in the energy sustainable development.

Solar fresh air system, heat pipe, phase change thermal storage, simulation analysis.