Thermo economic and exergy analysis of a compression-absorption refrigeration system assisted by geothermal energy

The aims of this work are to develop a combined refrigeration system and do both thermo economic and exergy analysis of this cycle. Three working fluids (R717, R22, and R131a) are selected for the conventional compression system and the ammonia–water pair for the absorption system. The geothermal temperature sourcein the range 313–313 K supplies a generator operating at 336 K. Results show that the COP can be improved by 31–373, compared with the conventional cycle, under the same operating conditions, that is an evaporation temperature at 253 K and a condensation temperature of 303K. also the results show that the exergetic efficiency improved by 13.63. For industrial refrigeration, the proposed system constitutes an alternative solution for reducing energy consumption and greenhouse gas emissions

Keywords:

Exergy , Thermo economic , combined system , geothermal energy , Absorption system