An experimental and computational investigation of a thermal storage system based on a phase change material: heat transfer and performance characterization
File(s)
Supporting information
Accepted version
Author(s)
Gupta, A
Mathie, R
Markides, CN
Type
Journal Article
Abstract
The integration of latent heat storage solutions into modern heating and cooling systems has the potential to enhance overall system performance compared to standard hot water systems (radiators and tanks) due to an augmentation of the stored heat by the latent heat of a suitable material. This paper presents computational predictions complemented by experimental measurements of the dynamic behavior and performance of an active thermal storage system for domestic applications, based on the use of a hydrated salt phase change material (PCM) and a conventional cylindrical storage tank. The thermal storage (heating) and extraction (cooling) rates for this PCM-filled tank are compared to a water-filled tank. Flow and temperature fields are analyzed in a customized storage tank design for heat transfer and performance characterization. Experimental findings show good agreement with full 3-D simulation results. The heat removal characteristic is identified as being the main factor limiting the arrangement’s performance when compared to a water-based system, due to the solidification of the PCM onto the pipes, and a significant consequent decrease in heat flux. It is confirmed that the PCM thermal storage solution has the capability to store a large amount of heat effectively, but design improvements are required to eliminate the cooling-limited heat transfer process in the investigated arrangement.
Date Issued
2014-10-29
Date Acceptance
2014-03-21
Citation
Computational Thermal Sciences, 2014, 6 (4), pp.341-359
ISSN
1940-2554
Publisher
Begell House
Start Page
341
End Page
359
Journal / Book Title
Computational Thermal Sciences
Volume
6
Issue
4
Copyright Statement
© 2014 The Author(s).
Sponsor
Engineering & Physical Science Research Council (EPSRC)
Phase Change Material Products Limited
Grant Number
EP/J006041/1
CENRE_P44019
Subjects
phase change material
domestic hot water
latent heat
salt hydrate
thermal energy storage
Chemical Engineering
0913 Mechanical Engineering
Publication Status
Published
Date Publish Online
2014-10-29