A Thermodynamic Analysis of Alternative Refrigerants in Vapor-Compression Refrigeration Cycles

1990 ◽  
Author(s):  
M. J. Provost ◽  
E. M. Arrieta
Keyword(s):  
Thermodynamic Analysis ◽  
Vapor Compression ◽  
Alternative Refrigerants ◽  
Vapor Compression Refrigeration

Thermodynamic Analysis of Refrigeration Cycle Performance with R125/R600a Mixtures

2011 ◽  
Vol 474-476 ◽  
pp. 1643-1647
Author(s):  
Fang Wang ◽  
Xian Ping Zhang ◽  
Feng Kun Wang ◽  
Xiao Wei Fan ◽  
Zhi Wei Lian
Keyword(s):  
Thermodynamic Analysis ◽  
Cooling Capacity ◽  
Cycle Performance ◽  
Vapor Compression ◽  
Refrigeration System ◽  
Alternative Refrigerants ◽  
Factors Affecting ◽  
Vapor Compression Refrigeration ◽  
Volumetric Cooling ◽  
Better Than

This paper deals with a thermodynamic analysis of a vapor compression refrigeration system with the new refrigerant R125/R600a blends, parameters and factors affecting the performance are investigated, and also a comparison with that of R22 is presented. Encouraging results are obtained, at a certain concentration of R125 in mixtures, the R125/R600a refrigerant blends perform better than R22 but with loss of volumetric cooling capacity in air conditioning applications. Which may provide useful information for alternative refrigerants.

Thermodynamic Analysis and Working Fluid Optimization of a Combined ORC-VCC System Using Waste Heat From a Marine Diesel Engine

2014 ◽  
Author(s):  
Oumayma Bounefour ◽  
Ahmed Ouadha
Keyword(s):  
Thermodynamic Analysis ◽  
Waste Heat ◽  
Operating Conditions ◽  
Working Fluid ◽  
Vapor Compression ◽  
Marine Diesel ◽  
Vapor Compression Refrigeration ◽  
Propylene Yield ◽  
Fluid Optimization ◽  
Propane Butane

This paper examines through a thermodynamic analysis the feasibility of using waste heat from marine Diesel engines to drive a vapor compression refrigeration system. Several working fluids including propane, butane, isobutane and propylene are considered. Results showed that isobutane and Butane yield the highest performance, whereas propane and propylene yield negligible improvement compared to R134a for operating conditions considered.

scholarly journals Performance Analysis and Working Fluid Selection for Single and Two Stages Vapor Compression Refrigeration Cycles

Processes ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 1017
Author(s):  
Bahaa Saleh ◽  
Ayman A. Aly ◽  
Mishal Alsehli ◽  
Ashraf Elfasakhany ◽  
Mohamed M. Bassuoni
Keyword(s):  
Energy Efficiency ◽  
Environmental Impacts ◽  
High Energy ◽  
Working Fluid ◽  
Vapor Compression ◽  
Alternative Refrigerants ◽  
Two Stage ◽  
Azeotropic Mixtures ◽  
Vapor Compression Refrigeration ◽  
Two Stages

Screening for alternative refrigerants with high energy efficiency and low environmental impacts is one of the highest challenges of the refrigeration sector. This paper investigates the performance and refrigerant screening for single and two stages vapor compression refrigeration cycles. Several pure hydrocarbons, hydrofluorocarbons, hydrofluoroolefins, fluorinated ethers, and binary azeotropic mixtures are proposed as alternative refrigerants to substitute R22 and R134a due to their environmental impacts. The BACKONE equation of state is used to compute the thermodynamic properties of the candidates. The results show that the maximum coefficients of performance (COP) for single and two stage cycles using pure substances are achieved using cyclopentane with values of 4.14 and 4.35, respectively. On the other side, the maximum COP for the two cycles using azeotropic mixtures is accomplished using R134a + RE170 with values of 3.96 and 4.27, respectively. The two-stage cycle presents gain in COP between 5.1% and 19.6% compared with the single-stage cycle based on the used refrigerant. From the obtained results, among all investigated refrigerants, cyclopentane is the most suitable refrigerant for the two cycles from the viewpoint of energy efficiency. However, extra cautions should be taken due to its flammability.

Thermodynamic analysis of a novel Ejector Enhanced Vapor Compression Refrigeration (EEVCR) cycle

Energy ◽  
2018 ◽  
Vol 163 ◽  
pp. 1217-1230 ◽  
Author(s):  
M. Elakhdar ◽  
B.M. Tashtoush ◽  
E. Nehdi ◽  
L. Kairouani
Keyword(s):  
Thermodynamic Analysis ◽  
Vapor Compression ◽  
Vapor Compression Refrigeration

Investigation of Irreversibilities in the Compression Process for Alternative Refrigerants in a Vapor Compression Refrigeration Cycle

2007 ◽  
Author(s):  
Ali Kilicarslan ◽  
Norbert Mu¨ller
Keyword(s):  
Computer Code ◽  
Refrigeration Cycle ◽  
Vapor Compression ◽  
Alternative Refrigerants ◽  
Compression Process ◽  
Evaporator Temperature ◽  
Vapor Compression Refrigeration Cycle ◽  
Vapor Compression Refrigeration ◽  
Moderate Range ◽  
Isentropic Efficiency

Irreversibility analyses during compression process are presented for some refrigerants namely, R290, R134a, R12, R22, and R152a in a vapor compression refrigeration cycle. The effects of evaporator temperature, condenser temperature and isentropic efficiency on the irreversibility rates and exergetic efficiencies of the refrigerants under study are investigated By the means of a computer code that simulates a vapor compression cycle including subcooling and superheating. For all the refrigerants in this study, the irreversibility in the compression process decreased as the evaporator temperature and isentropic efficiency increased and it increased with the increasing values of the condenser temperatures. Exergetic efficiency of the compressor increased as the isentropic efficiency of the compressor increased while it decreased with the increasing values of evaporator temperatures. In the case of increasing evaporator and condenser temperatures, and isentropic efficiency values, R22 and R152a approximately show the same and lowest values of compressor irreversibility while R290 has the lowest values. The compressor irreversibilities and compressor exergetic efficiencies of R12 and R134a placed in the moderate range in the case of increasing evaporator and condenser temperatures, and isentropic efficiency values.

THERMODYNAMIC ANALYSES OF MULTIPLE EVAPORATORS VAPOR COMPRESSION REFRIGERATION SYSTEMS WITH R410A, R290, R1234YF, R502, R404A, R152A AND R134A

2014 ◽  
Vol 22 (01) ◽  
pp. 1450003 ◽  
Author(s):  
KAPIL CHOPRA ◽  
V. SAHNI ◽  
R. S. MISHRA
Keyword(s):  
Numerical Model ◽  
Thermodynamic Analysis ◽  
Energetic Efficiency ◽  
Vapor Compression ◽  
Exergetic Efficiency ◽  
System Defect ◽  
Energy And Exergy ◽  
System 2 ◽  
Vapor Compression Refrigeration ◽  
System 1

In this paper, comparative thermodynamic analysis of system-1 (multiple evaporators and compressors with individual expansion valves) and system-2 (multiple evaporators and compressors with multiple expansion valves) has been presented which is based on energy and exergy principles. The comparison of systems-1 and -2 using ecofriendly R410A, R290, R1234YF, R502, R404A, R152A and R134A refrigerants was done in terms of COP (energetic efficiency), exergetic efficiency and system defect. Numerical model has been developed for systems-1 and -2 for finding out irreversibility and it was observed that system-2 is better system in comparison with system-1 for selected refrigerants. It was also found that R152a shows better performances than other considered refrigerants for both systems.

scholarly journals Study and Analysis of Capillary Tube and Thermostatic Expansion valve in Domestic Refrigerator using Eco friendly Refrigerant : A Review

2019 ◽  
pp. 480-487
Author(s):  
Yudhveer Kumar Verma ◽  
Ajay Singh ◽  
Ashish Verma
Keyword(s):  
Global Warming ◽  
Capillary Tube ◽  
Vapor Compression ◽  
Alternative Refrigerants ◽  
Environment Friendly ◽  
Domestic Refrigerator ◽  
Expansion Valve ◽  
Vapor Compression Refrigeration ◽  
Small Capacity ◽  
Ozone Depletion Potential

The current review is concerned with the study of the effect of different expansion devices (capillary tube and Thermostatic expansion valve) on the alternative refrigerants used in the domestic refrigerators to have better performance with minimum losses. This paper give the summary and range of various refrigerants used in the refrigeration cycle of global warming which affect the environment by the use of refrigerant, and our aim is to reduce the effect of global warming as well as optimize the performance of domestic refrigerators by using the latest refrigerants and appropriate expansion devices like capillary tube and Thermostatic expansion valve. R134a is used in vapor compression refrigeration system having zero ozone depletion potential (ODP) and almost good thermodynamic properties, but it has a high Global Warming Potential (GWP) of 1300.So many researchers identifying new refrigerants and their blend which are environmental friendly and having low GWP and low ODP. Hydrocarbon refrigerants mainly propane, butane and isobutene are proposed as an environment friendly refrigerants. After reviewing the various literatures on the various expansion devices and hydrocarbons refrigerants and their mixture gives good performance in small capacity domestic refrigerator.

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