Next Article in Journal
Multi-Criterion Two-Sided Matching of Public–Private Partnership Infrastructure Projects: Criteria and Methods
Previous Article in Journal
An Exploratory Study of Swedish Charities to Develop a Model for the Reuse-Based Clothing Value Chain
Open AccessArticle

First and Second Law Analyses of Trans-critical N2O Refrigeration Cycle Using an Ejector

1
Faculty of Mechanical and Energy Engineering, Shahid Beheshti University, A.C., Tehran 16765-1719, Iran
2
Faculty of Mechanical Engineering, Tabriz University, Tabriz 51666-14766, Iran
3
Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4, Canada
*
Author to whom correspondence should be addressed.
Sustainability 2018, 10(4), 1177; https://doi.org/10.3390/su10041177
Received: 18 February 2018 / Revised: 30 March 2018 / Accepted: 9 April 2018 / Published: 13 April 2018
(This article belongs to the Section Energy Sustainability)
An ejector-expansion refrigeration cycle using nitrous oxide was assessed. Thermodynamic analyses, including energy and exergy analyses, were carried out to investigate the effects on performance of several key factors in the system. The results show that the ejector-expansion refrigeration cycle (EERC) has a higher maximum coefficient of performance and exergy efficiency than the internal heat exchanger cycle (IHEC), by 12% and 15%, respectively. The maximum coefficient of performance and exergy efficiency are 14% and 16.5% higher than the corresponding values for the vapor-compression refrigeration cycle (VCRC), respectively. The total exergy destruction for the N2O ejector-expansion cycle is 63% and 53% less than for IHEC and VCRC, respectively. Furthermore, the highest COPs for the vapor-compression refrigeration, the internal heat exchanger and the ejector-expansion refrigeration cycles correspond to a high side pressure of 7.3 MPa, and the highest COPs for the three types of CO2 refrigeration cycles correspond to a high side pressure of 8.5 MPa. Consequently, these lead to a lower electrical power consumption by the compressor. View Full-Text
Keywords: refrigeration cycle; ejector; nitrous oxide; COP; exergy refrigeration cycle; ejector; nitrous oxide; COP; exergy
Show Figures

Figure 1

MDPI and ACS Style

Aghazadeh Dokandari, D.; S. Mahmoudi, S.M.; Bidi, M.; Haghighi Khoshkhoo, R.; Rosen, M.A. First and Second Law Analyses of Trans-critical N2O Refrigeration Cycle Using an Ejector. Sustainability 2018, 10, 1177.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map

1
Back to TopTop