Table of Contents
Chinese Journal of Engineering
Volume 2013, Article ID 190279, 11 pages
Review Article

Solar Air Heaters with Thermal Heat Storages

1Department of Mechanical Engineering, MIT, Moradabad 244001, India
2Department of Mechanical Engineering, NIT, Hamirpur 177001, India

Received 30 September 2013; Accepted 20 October 2013

Academic Editors: L. Cao and G. Chen

Copyright © 2013 Abhishek Saxena and Varun Goel. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Solar energy can be converted into different forms of energy, either to thermal energy or to electrical energy. Solar energy is converted directly into electrical power by photovoltaic modules, while solar collector converts solar energy into thermal energy. Solar collector works by absorbing the direct solar radiation and converting it into thermal energy, which can be stored in the form of sensible heat or latent heat or a combination of sensible and latent heats. A theoretical study has been carried out to rate the various thermal energy storage commonly used in solar air heaters. During the investigations rock bed storages have been found to be low type thermal heat storage, while phase change materials have been found to be high heat thermal storages. Besides this, a few other heat storing materials have been studied and discussed for lower to higher ratings in terms of thermal performance purposely for solar heaters.