On Efficiency of Air-Phase Change Material Heat Exchanger for Free Cooling System

International Journal of Thermal Engineering
© 2021 by SSRG - IJTE Journal
Volume 7 Issue 2
Year of Publication : 2021
Authors : Rucha. R. Kolhekar, Nishikant. W. Kale
How to Cite?

Rucha. R. Kolhekar, Nishikant. W. Kale, "On Efficiency of Air-Phase Change Material Heat Exchanger for Free Cooling System," SSRG International Journal of Thermal Engineering, vol. 7,  no. 2, pp. 1-6, 2021. Crossref, https://doi.org/10.14445/23950250/IJTE-V7I2P101


Free cooling is a promising passive cooling technique that requires minimum or no energy for cooling the space. Free cooling can be achieved with the use of phase change material based thermal energy storage. An organic phase change material (PCM) with phase change temperature 350C is selected based on the climatic conditions of the selected location. A heat exchanger containing phase change material with selected geometry is tested by varying selected dependent variables, which are inlet airflow velocity and the orientation of the flat plates of the heat exchanger. In this paper, investigation results of an air-phase change material heat exchanger are presented along with its efficiency. It was observed that maximum heat exchanger efficiency of 74.07%was obtained.


Air-PCM heat exchanger, Free cooling, Passive cooling, Phase Change Materials, Thermal Energy Storage


[1] BP Statistical Review of World Energy., Leading countries in primary energy consumption worldwide in 2019Statista June 2020, survey time period (2019)(2020) Available at https://www.statista.com/statistics/263455/primary-energy-consumption-of-selected-countries/ accessed on 04st December 2020
[2] Cao, Xiaodong, Xilei Dai, and Junjie Liu., Building energy-consumption status worldwide and the state-of-the-art technologies for zero-energy buildings during the past decade., Energy and buildings 128 (2016) 198-213.
[3] Geetha, N. B., and R. Velraj., Passive cooling methods for energy-efficient buildings with and without thermal energy storage–A review." Energy Education Science and Technology Part A: Energy Science and Research 29(2) (2012) 913-946.
[4] Zalba, Belén, José M. Marı́n, Luisa F. Cabeza, and HaraldMehling. "Free-cooling of buildings with phase change materials., International Journal of Refrigeration 27(8) (2004) 839-849.
[5] Yanbing, Kang, Jiang Yi, and Zhang Yinping., Modeling and experimental study on an innovative passive cooling system—NVP system., Energy and buildings 35(4) (2003) 417-425.
[6] Medved, Sašo, and CirilArkar., Correlation between the local climate and the free-cooling potential of latent heat storage., Energy and Buildings 40(4) (2008) 429-437.
[7] Waqas, Adeel, and S. Kumar. , Utilization of latent heat storage unit for comfort ventilation of buildings in hot and dry climates." International Journal of Green Energy 8(1) (2011) 1-24.
[8] Barreneche, Camila, Helena Navarro, Susana Serrano, Luisa F. Cabeza, and A. Inés Fernández., New database on phase change materials for thermal energy storage in buildings to help PCM selection." Energy Procedia 57 (2014) 2408-2415.
[9] Iten, Muriel, Shuli Liu, and AshishShukla., A review on the air-PCM-TES application for free cooling and heating in the buildings., Renewable and Sustainable Energy Reviews 61 (2016): 175-186.
[10] Stritih, Uroš, and VincencButala., Energy savings in building with a PCM free cooling system., Strojniškivestnik-Journal of Mechanical Engineering 57(2) (2011) 125-134.
[11] Raj, V. Antony Aroul, and R. Velraj., Heat transfer and pressure drop studies on a PCM-heat exchanger module for free cooling applications., International Journal of Thermal Sciences 50(8) (2011) 1573-1582.
[12] Chaiyat, Nattaporn, and TanongkiatKiatsiriroat., Energy reduction of building air-conditioner with phase change material in Thailand., Case Studies in Thermal Engineering 4 (2014) 175-186.
[13] Hu, Yue, and Per KvolsHeiselberg., A new ventilated window with PCM heat exchanger—Performance analysis and design optimization., Energy and Buildings 169 (2018) 185-194.
[14] Said, M. A., and Hamdy Hassan., An experimental work on the effect of using the new technique of thermal energy storage of phase change material on the performance of air conditioning unit." Energy and Buildings 173 (2018) 353-364.
[15] Zalba, Belén, José M. Marı́n, Luisa F. Cabeza, and HaraldMehling. "Free-cooling of buildings with phase change materials." International Journal of Refrigeration 27(8) (2004) 839-849.
[16] Kolhekar R.R, Kale N.W., Design And Testing of Air Heat Exchanger With Phase Change Material (PCM) For Free Cooling”. International Journal of Mechanical and Production Engineering Research and Development, 11(3) (2021) 53-64.