On increasing the thermal mass of a salinity gradient solar pond with external heat addition: A transient study

Ganguly, S, Date, A and Akbarzadeh, A 2019, 'On increasing the thermal mass of a salinity gradient solar pond with external heat addition: A transient study', Energy, vol. 168, pp. 43-56.


Document type: Journal Article
Collection: Journal Articles

Title On increasing the thermal mass of a salinity gradient solar pond with external heat addition: A transient study
Author(s) Ganguly, S
Date, A
Akbarzadeh, A
Year 2019
Journal name Energy
Volume number 168
Start page 43
End page 56
Total pages 14
Publisher Elsevier Ltd
Abstract In salinity gradient solar ponds (SGSPs) solar thermal energy is mainly stored in the lower-convective zone (LCZ) the volume of which defines the thermal mass of storage. The present study explores the provision of increasing the heat storage in a SGSP by increasing the thermal mass of it. It also addresses the method of enhancing the thermal performance of a SGSP by increasing the thermal mass, while adding heat from external sources. Earlier studies have proved that adding external heat to the SGSP for storage enhances the thermal performance of it significantly. This study aims to prove that increasing the thermal mass of storage further increases the energy efficiency of a SGSP when external heat is added to it. A hybrid system of a SGSP coupled with evacuated tube solar collectors (ETSCs) is used in this study. Several parameters like storage temperature in LCZ, heat addition flux and heat addition efficiency of ETSC, instantaneous efficiency of SGSP, heat extraction from SGSP are studied in this paper for different cases of with and without heat addition and with normal and enhanced thermal mass. It is found that increasing thermal mass can significantly enhance the thermal performance and efficiency of a SGSP.
Subject Energy Generation, Conversion and Storage Engineering
Keyword(s) Evacuated tube solar collectors
Salinity gradient solar ponds
Solar thermal energy
Thermal efficiency
Thermal mass
Transient modeling
DOI - identifier 10.1016/j.energy.2018.11.090
Copyright notice © 2018 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
ISSN 0360-5442
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