THERMAL SCIENCE

International Scientific Journal

Authors of this Paper

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Shailendra Kumar

,

Kishan Kumar V.S.

CHARGING-DISCHARGING CHARACTERISTICS OF MACRO-ENCAPSULATED PHASE CHANGE MATERIALS IN AN ACTIVE THERMAL ENERGY STORAGE SYSTEM FOR A SOLAR DRYING KILN

ABSTRACT
The present study explores suitability of two phase change materials (PCM) for development of an active thermal storage system for a solar drying kiln by studying their melting and solidification behaviors. A double glass glazing prototype solar kiln was used in the study. The storage system consisted of a water storage tank with PCM placed inside the water in high density polyethylene containers. The water in the tank was heated with help of solar energy using an evacuated tube collector array. The melting and solidification temperature curves of PCM were obtained by charging and discharging the water tank. The study illustrated the utility of the PCM in using the stored thermal energy during their discharge to enhance the temperature inside the kiln. The rate of temperature reduction was found to be higher for paraffin wax as compared to a fatty acid based PCM. The water temperature during the discharge of the PCM showed dependence on the discharge characteristics of each PCM suggesting their suitability in designing active thermal storage systems.
KEYWORDS
Solar drying kiln, thermal storage, PCM, charge and discharge, paraffin
PAPER SUBMITTED: 2015-06-15
PAPER REVISED: 2015-11-09
PAPER ACCEPTED: 2015-12-21
PUBLISHED ONLINE: 2016-01-01
DOI REFERENCE: https://doi.org/10.2298/TSCI150615216K
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2017, VOLUME 21, ISSUE Issue 6, PAGES [2525 - 2532]
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Charging-discharging characteristics of macro-encapsulated phase change materials in an active thermal energy storage system for a solar drying kiln

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence