Exergy Analysis of Geothermal Heat Pump in Larijan

Subject Areas : environmental management

Hesamoddin  Salarian ¹ (- Assistant Professor, Islamic Azad University Nour Branch, Nour, Iran. * ( Corresponding Author))
Homan  Naderi ² (MSc, Mechanical Engineering Facult Islamic Azad University, Ayatollah Amoli Branch, Iran.)
Morteza  Hosainzade ³ (Assistant Professor, Islamic Azad University, Ayatollah Amoli Branch, Iran.)

Received: 2014-10-19 Accepted : 2014-12-30 Published : 2016-11-21

Keywords: Ground-Coupled Heat Pump, Energy, Exergy, coefficient of performance,

Abstract :

Background and Objective: This study aims to investigate a Ground-Coupled Heat Pump system with vertical U-bend heat exchanger which can provide the energy needed from the depths of earth. Exergy of the system was analyzed and the performance efficiency and coefficient were obtained. Method:In Larijan village, due to hot springs in the area, exergy analyses of two Ground-Coupled Heat Pump systems with vertical U-bend and open loop heat exchangers were compared. Energy, exergy, entropy and enthalpy equations of both Ground-Coupled Heat Pump systems were applied and results were presented based on geographic and climatic conditions of Larijan region. Results:Moreover, it was found that the maximum exergy losses in both systems occurres in the fan condenser. Conclusion: The results show that, due to higher temperatures (the temperature of the ground or the hot spring), the performance coefficient and the efficiency of geothermal heat pump system with the open loop heat exchangers are higher.      

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