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Journal of Zhejiang University SCIENCE A 2006 Vol.7 No.8 P.1422-1430


Study on performance of a packed bed latent heat thermal energy storage unit integrated with solar water heating system


Affiliation(s):  Department of Mechanical Engineering, Sri Venkateswara College of Engineering, Chennai 602 105, India; more

Corresponding email(s):   nalls@svce.ac.in

Key Words:  Charging, Discharging, Heat transfer fluid (HTF), Latent heat, Phase change material (PCM), Packed bed, Thermal energy storage (TES)

NALLUSAMY N., SAMPATH S., VELRAJ R.. Study on performance of a packed bed latent heat thermal energy storage unit integrated with solar water heating system[J]. Journal of Zhejiang University Science A, 2006, 7(8): 1422-1430.

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J0 - Journal of Zhejiang University Science A
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.2006.A1422

In thermal systems such as solar thermal and waste heat recovery systems, the available energy supply does not usually coincide in time with the process demand. Hence some form of thermal energy storage (TES) is necessary for the most effective utilization of the energy source. This study deals with the experimental evaluation of thermal performance of a packed bed latent heat TES unit integrated with solar flat plate collector. The TES unit contains paraffin as phase change material (PCM) filled in spherical capsules, which are packed in an insulated cylindrical storage tank. The water used as heat transfer fluid (HTF) to transfer heat from the solar collector to the storage tank also acts as sensible heat storage material. charging experiments were carried out at varying inlet fluid temperatures to examine the effects of porosity and HTF flow rate on the storage unit performance. The performance parameters such as instantaneous heat stored, cumulative heat stored, charging rate and system efficiency are studied. Discharging experiments were carried out by both continuous and batchwise processes to recover the stored heat, and the results are presented.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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