@article{rse2019712,
author={Tarrad, Ali H.},
title={The Utilization of Renewable Energy Source and Environment Friendly Refrigerants in Cooling Mode},
journal={Sustainable Energy},
volume={7},
number={1},
pages={6--14},
year={2019},
url={http://pubs.sciepub.com/rse/7/1/2},
issn={2372-2142},
abstract={This investigation focuses on the renewable geothermal energy source utilized as a reservoir for a water chiller unit in the cooling mode. Two hydrocarbon refrigerants, R290 and R600a were suggested to be implemented in a closed loop system to produce chilled water for air conditioning purposes. The traditional R-22 and its substitute R410A were also investigated in a direct expansion geothermal system. The analysis was carried out at the evaporation and condensation temperature ranges of (-25 to -5) ˇăC and (15 to 35) ˇăC respectively. The data showed that R-290 revealed similar coefficient of performance as that of R-22. R-410A exhibited a lower coefficient of performance than that of the R-22 refrigerant by (1-5) %. On the contrary, R-600a showed a higher coefficient of performance than that of the R-22 by about (3) % for the investigation range of operating conditions. R-410A refrigerant exhibited the highest load in comparison with R-22 among other circulated refrigerants by (1.5) %. R-600a showed a lower condenser load than that of the R-22 system by a negligible margin value. The hydrocarbon refrigerants and the azeotrop mixture were found to be proper candidates to replace R-22 in geothermal system.},
doi={10.12691/rse-7-1-2}
publisher={Science and Education Publishing}
}