Theoretical analysis of a combined power and ejector refrigeration cycle using zeotropic mixture

Yang, Xingyang; Zhao, Li; Li, Hailong; Yu, Zhixin

doi:10.1016/j.apenergy.2015.05.001

Cited by 68 publications

(9 citation statements)

References 15 publications

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“…The criogenic cicles are detaile din Section 4.7.4. Yang et al [301] studied a a coupled power and EAbRS using zeotropic mixture. The authors have studied the second law efficiency as function of the mixture used as working fluid: the maximum efficiency was 7.83%,…”

Section: Eabrs Combined With a Power Cyclementioning

confidence: 99%

Ejector refrigeration: A comprehensive review

Besagni

Mereu

Inzoli

2016

Renewable and Sustainable Energy Reviews

414

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a b s t r a c tThe increasing need for thermal comfort has led to a rapid increase in the use of cooling systems and, consequently, electricity demand for air-conditioning systems in buildings. Heat-driven ejector refrigeration systems appear to be a promising alternative to the traditional compressor-based refrigeration technologies for energy consumption reduction. This paper presents a comprehensive literature review on ejector refrigeration systems and working fluids. It deeply analyzes ejector technology and behavior, refrigerant properties and their influence over ejector performance and all of the ejector refrigeration technologies, with a focus on past, present and future trends. The review is structured in four parts. In the first part, ejector technology is described. In the second part, a detailed description of the refrigerant properties and their influence over ejector performance is presented. In the third part, a review focused on the main jet refrigeration cycles is proposed, and the ejector refrigeration systems are reported and categorized. Finally, an overview over all ejector technologies, the relationship among the working fluids and the ejector performance, with a focus on past, present and future trends, is presented.

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Section: Eabrs Combined With a Power Cyclementioning

confidence: 99%

Ejector refrigeration: A comprehensive review

Besagni

Mereu

Inzoli

2016

Renewable and Sustainable Energy Reviews

414

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“…More recently, application of zeotropic mixture in combined cooling and ejector refrigeration (CCER) cycles have been highlighted for performance enhancement purposes [28]. Yang et al [29] analyzed a CCER cycle using a zeotropic mixture of isobutene/pentane based on the first and second laws of thermodynamics. The results introduced the ejector as the most irreversible component of the overall cycle.…”

Section: Introductionmentioning

confidence: 99%

Parametric study and working fluid selection of modified combined power and refrigeration cycles (MCPRCs) using low-temperature heat sources

Rostamzadeh

Ghaebi

2018

J Braz. Soc. Mech. Sci. Eng.

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This paper presents a theoretical analysis of various combined power and refrigeration cycles (CPRCs) as well as the working fluid selection used in these cycles based on the first law of thermodynamics. These proposed cycles include a combination of organic Rankine cycles (ORCs) and an ejector refrigeration cycle (ERC) to produce more power and refrigeration, simultaneously. In all the proposed cycles, the ejector is driven by the exhausts of the turbine. The performance of the proposed cycles for five appropriate working fluids (i.e., isobutane, isobutene, butene, R236fa, and R245fa) is evaluated by the means of their corresponding thermal efficiency and power/refrigeration ratio. It has been demonstrated that among all the proposed working fluids, isobutane is a good candidate with a thermal efficiency of 39.03-44.52%, which is enhanced through these modifications, successively. In this study, simple CPRC and modified regenerative CPRC with an IHE have the minimum and maximum thermal efficiencies, respectively. Thermal efficiency is improved by 8.27, 6.76, 5.63, 5.33, and 5.49%, in the case of R245fa, R236fa, butene, isobutene, and isobutane, respectively. Throughout these state-of-art modifications, rejecting heat has also been decreased. Moreover, the effects of key parameters such as evaporator, condenser, and generator temperatures on each cycle are also investigated. Keywords Organic Rankine cycles (ORCs) Á Ejector refrigeration cycle (ERC) Á Modified combined power and refrigeration cycles (MCPRCs) Á Working fluids Á Low-temperature heat source

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“…It was indicated that mixture isobutene/pentane of the cogeneration system could reach the highest exergy efficiency of 7.83%. The generation temperature had the greatest influence on exergy efficiency [9].…”

Section: Introductionmentioning

confidence: 99%