Space cooling using geothermal single‐effect water/lithium bromide absorption chiller

Energy Science & Engineering

Amjad Anvari‐Moghaddam¹  Milad Sadeghzadeh²  Mohammad Hossein Ahmadi³  Mohammad Al‐Shabi⁴  Ehab Bani Hani⁵  Mamdouh El Haj Assad⁶  Mona Albawab⁶ 

[1] Department of Energy Aalborg University AalborgDenmark;Department of Renewable Energy and Environmental Engineering University of Tehran Tehran Iran;Faculty of Mechanical Engineering Shahrood University of Technology Shahrood Iran;Mechanical Engineering Department University of Sharjah Sharjah UAE;School of Engineering Mechanical Engineering Department Australian College of Kuwait Mishref Kuwait;Sustainable and Renewable Energy Engineering Department University of Sharjah Sharjah UAE;

关键词: absorption chiller;    geothermal power plant;    lithium bromide;    space cooling;   

DOI  :  10.1002/ese3.946

来源: DOAJ

【 摘 要 】

Abstract This research is proposed to fully investigate the performance of a single‐effect water/lithium bromide absorption chiller driven by geothermal energy. Since absorption cycles are considered as low‐grade energy cycles, this innovative idea of rejecting fluid from a single‐flash geothermal power plant with low‐grade energy would serve as efficient, economical, and promising technology. In order to examine the feasibility of this approach, a residential building which is located in Sharjah, UAE, considered to evaluate its cooling capacity of 39 kW which is calculated using MATLAB software. Based on the obtained cooling load, modeling of the required water/lithium bromide single‐effect absorption chiller machine is implemented and discussed. A detailed performance analysis of the proposed model under different conditions is performed using Engineering Equation Solver software (EES). Based on the obtained results, the major factors in the design of the proposed system are the size of the heat exchangers and the input heat source temperature. The results are presented graphically to find out the geofluid temperature and mass flow and solution heat exchanger effectiveness effects on the chiller thermal performance. Moreover, the effects of the size of all components of the absorption chiller on the cooling load to meet the space heating are presented. The thermal efficiency of the single‐flash geothermal power plant is about 13% when the power plant is at production well temperature 250℃, separator pressure 0.24 MPa, and condenser pressure 7.5 kPa. The results show that the coefficient of performance (COP) reaches about 0.87 at solution heat exchanger effectiveness of 0.9, when the geofluid temperature is 120℃.

【 授权许可】

Unknown