Modeling of heat losses from a PCM storage tank for solar thermophotovoltaic systems

Veeraragavan, Ananthanarayanan and Shum, Pei Wai (2017) Modeling of heat losses from a PCM storage tank for solar thermophotovoltaic systems. Journal of Energy Engineering, 143 5: 04017033-1-04017033-12. doi:10.1061/(ASCE)EY.1943-7897.0000459

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Author Veeraragavan, Ananthanarayanan
Shum, Pei Wai
Title Modeling of heat losses from a PCM storage tank for solar thermophotovoltaic systems
Journal name Journal of Energy Engineering   Check publisher's open access policy
ISSN 0733-9402
Publication date 2017-05-27
Year available 2017
Sub-type Article (original research)
DOI 10.1061/(ASCE)EY.1943-7897.0000459
Open Access Status File (Author Post-print)
Volume 143
Issue 5
Start page 04017033-1
End page 04017033-12
Total pages 12
Place of publication Reston, VA, United States
Publisher American Society of Civil Engineers
Language eng
Abstract This work explores the influence of lateral heat losses from a phase change material (PCM) storage tank on the performance of a storage integrated solar thermophotovoltaic (SISTPV) system by means of an analytical model. The heat losses from the lateral surface of the PCM tank are modeled using Newton’s law of cooling by prescribing a heat-loss coefficient on the lateral surfaces. The results show that at high heat losses, low thermal efficiencies are realized. Correspondingly larger solar concentrations are required to fully melt the PCM tank. At low heat losses, such as can be expected when using thermal insulation on the lateral surfaces, approximately 40% thermal efficiency can be realized. The results also demonstrate that a high absorber area:length of PCM tank squared (SR) ratio enables the system to have a high thermal efficiency. For a high-SR, low-heat-loss design case, having a high taper ratio, high area ratio between absorber area and inlet hole area, and small PCM tank length all achieve higher thermal efficiencies. It is expected that these SISTPV systems will be designed at steadystate to be fully molten in order to maximize thermal energy storage via the latent heat of the PCM. The analytical model developed here can be used to predict the design conditions under which the PCM tank will be fully molten
Keyword Solar energy
Thermal storage
Phase change material
Concentrating solar power
Solar thermophotovoltaics
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
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Created: Sat, 03 Jun 2017, 11:26:47 EST by Anand Veeraragavan on behalf of School of Mechanical and Mining Engineering