Cooling Potential Evaluation of Single & Integrated Underground Heat Exchanger at Hot & Dry Climate of Bikaner Rajasthan India : An Experimental Approach

International Journal of Thermal Engineering

© 2019 by SSRG - IJTE Journal

Volume 5 Issue 3

Year of Publication : 2019

Authors : Chandra Shekhar Sharma, O.P. Jakhar, Happa Khan

10.14445/23950250/IJTE-V5I3P101

How to Cite?

Chandra Shekhar Sharma, O.P. Jakhar, Happa Khan, "Cooling Potential Evaluation of Single & Integrated Underground Heat Exchanger at Hot & Dry Climate of Bikaner Rajasthan India : An Experimental Approach," SSRG International Journal of Thermal Engineering, vol. 5,  no. 3, pp. 1-4, 2019. Crossref, https://doi.org/10.14445/23950250/IJTE-V5I3P101

Abstract:

The use of earth as a heat source or as a heat sink with the buried pipes can serve as a direct heat exchanger that is called earth air tunnel heat exchanger or geo-thermal heat exchanger or underground heat exchanger. In this research paper, cooling potential of single and integrated underground heat exchanger has been experimentally evaluated for hot and dry climate of Bikaner city of northwestern India, during summer season. Experimental analysis has been done at three different inlet air velocities (10 m/s, 12 m/s & 14 m/s) for obtaining optimum results to enhance the cooling capacity of single EATHE system by coupling it with water cooled heat exchanger at the outlet end. Utilization of waste water of water cooler was carried out in the water cooled heat exchanger. Results shows that the air which comes out from integrated underground heat exchanger is relatively cold than the air supplied by the single underground heat exchanger system. It was found that the average outlet air temperature got increased from 31.63 ̊ C to
36.50 ̊ C with respect to inlet air velocity 10 m/s to 14 m/s respectively for single underground heat exchanger whereas the average outlet air temperature got increased from 27.09 ̊ C to 32.67 ̊ C with respect to inlet air velocity 10 m/s to 14 m/s respectively for integrated underground heat exchanger. Therefore, the cooling capacity of EATHE can significantly increased by coupling it with water cooled heat exchanger.

Keywords:

Earth air tunnel heat exchanger, Water cooled heat exchanger, Cooling capacity, Inlet air velocity, Outlet air temperature, Experimental analysis, Summer season.

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