Publication Date:
2019
Description:
〈p〉Publication date: 1 October 2019〈/p〉
〈p〉〈b〉Source:〈/b〉 Energy Conversion and Management, Volume 197〈/p〉
〈p〉Author(s): Ali Zahedi Miran, Arash Nemati, Mortaza Yari〈/p〉
〈div xml:lang="en"〉
〈h5〉Abstract〈/h5〉
〈div〉〈p〉In the present study, a transcritical refrigeration cycle’s performance with dedicated mechanical subcooling (MS) is investigated from the energy, exergy and exergoeconomic viewpoints. Three different refrigerants containing CO〈sub〉2〈/sub〉 (R744), N〈sub〉2〈/sub〉O (R744A) and ethane (R170) are considered as the transcritical cycle’s refrigerant. A thorough parametric study is carried out on the system and finally, the effect of dedicated subcooling system is checked out on the energy, exergy and exergoeconomic perimeters. Based on the results, value of the COP and exergy performance for N〈sub〉2〈/sub〉O, unlike the CO2, is the highest. In other words, the CO〈sub〉2〈/sub〉 refrigerant shows the best economic performance. By comparing the system with and without subcooling cycle, it can be concluded that utilizing subcooler improves performance of the system and increases the unit product cost. However, the unit product cost increment is much lower than COP improvement which makes the subcooling an effective and economical way to improve the refrigeration system’s performance. Application of subcooler leads to an enhancement of 30.74%, 26.48% and 36.1% in COP for CO〈sub〉2〈/sub〉, N〈sub〉2〈/sub〉O, and ethane, respectively while the unit product cost increment is 9.04%, 8.37% and 10.63% for the mentioned refrigerants, respectively.〈/p〉〈/div〉
〈/div〉
Print ISSN:
0196-8904
Electronic ISSN:
1879-2227
Topics:
Energy, Environment Protection, Nuclear Power Engineering
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
