Optimization of a multistage vapor-compression refrigeration system for various refrigerants

Baakeem, Saleh S.; Orfi, Jamel; Alabdulkarem, Abdullah

doi:10.1016/j.applthermaleng.2018.02.071

Cited by 81 publications

(32 citation statements)

References 32 publications

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“…Anjum et al 12 carried out thermodynamic analysis on two-stage refrigeration system utilizing the waste heat of the intercooler for water heating. Predicted results showed an increase in COP by 4% to 5% within the investigated condenser temperature ranging from 40 C to 52 C. Bakeem et al 13 carried out energy, exergy and economic analysis on a multistage VCR system using eight di®erent refrigerants. They optimized the system to maximize COP of the multistage VCR system by varying four optimization variables namely: subcooling, desuperheating parameters, and evaporator and condenser temperatures of the system.…”

Section: Performance Of Two-stage Vcr Systemmentioning

confidence: 99%

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A Review on Energy and Exergy Analysis of Two-Stage Vapour Compression Refrigeration System

Chowdhury

Roy

Mandal

2019

Int. J. Air-Cond. Ref.

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This paper presents a review on energy and exergy analysis of two-stage vapour compression refrigeration (VCR) system. The use of alternative refrigerants instead of conventional refrigerants has also been addressed. The governing equations for the energetic and exergetic analysis of two-stage VCR system have been identified and presented. Several experimental and numerical investigations and their findings on the performance of the two-stage VCR system available in the literature have been discussed in brief. Some of the results have also been reproduced as case studies.

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Section: Performance Of Two-stage Vcr Systemmentioning

confidence: 99%

“…Energy balance equation across the°ash tank provides a relationship between m : HP and m : LP as done by Bakeem et al 13 Based on this the following equation can be written:…”

Section: Mathematical Formulationmentioning

confidence: 99%

A Review on Energy and Exergy Analysis of Two-Stage Vapour Compression Refrigeration System

Chowdhury

Roy

Mandal

2019

Int. J. Air-Cond. Ref.

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“…Regarding VCRSs, recent results on modeling and optimization considering single-objective functions can be found in [ 13 , 14 , 15 , 16 , 17 ] and multi-objective functions in [ 18 , 19 ]. By using energy, exergy, and economic analyses, Baakeem et al [ 14 ] theoretically investigated a multi-stage VCRS considering eight refrigerants (R407C, R22, R717, R134a, R1234yf, R1234ze(E), R410A, and R404A). The proposed model was implemented in the EES software and solved using the conjugate directions method.…”

Section: Introductionmentioning

confidence: 99%

“…A second case study consisted in maximizing the cooling capacity and the refrigerant mass flow rate and minimizing the discharge temperature. As in [ 14 ], the evaporator and condenser temperatures and the superheating and subcooling degrees were parametrically optimized. The evaporator temperature was varied between 258 and 288 K. A result indicated that the cooling capacity is strongly influenced by the evaporator temperature.…”

Section: Introductionmentioning

confidence: 99%

Superstructure-Based Optimization of Vapor Compression-Absorption Cascade Refrigeration Systems

Mussati

Morosuk

Mussati

2020

Entropy

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A system that combines a vapor compression refrigeration system (VCRS) with a vapor absorption refrigeration system (VARS) merges the advantages of both processes, resulting in a more cost-effective system. In such a cascade system, the electrical power for VCRS and the heat energy for VARS can be significantly reduced, resulting in a coefficient of performance (COP) value higher than the value of each system operating in standalone mode. A previously developed optimization model of a series flow double-effect H2O-LiBr VARS is extended to a superstructure-based optimization model to embed several possible configurations. This model is coupled to an R134a VCRS model. The problem consists in finding the optimal configuration of the cascade system and the sizes and operating conditions of all system components that minimize the total heat transfer area of the system, while satisfying given design specifications (evaporator temperature and refrigeration capacity of −17.0 °C and 50.0 kW, respectively), and using steam at 130 °C, by applying mathematical programming methods. The obtained configuration is different from those reported for combinations of double-effect H2O-LiBr VAR and VCR systems. The obtained optimal configuration is compared to the available data. The obtained total heat transfer area is around 7.3% smaller than that of the reference case.

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“…3. Some researchers have done worked on vapour compression refrigeration system to improve the performance of the system [3][4][5][6][7][8][9] and also investigated alternative refrigerants [10][11][12][13] which should be environmental friendly in terms of ozone depletion potential and global warming potential [14][15][16][17][18]. Thermodynamic analyses on vapour compression refrigeration system by designed computer software have been done with consideration of internal irreversibility, and the performance analyses on the refrigeration system have also been done with alternative refrigerants and found COPs, work inputs, second law efficiencies at different operating conditions [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Entropy generation and exergy destruction analyses for vapour compression refrigeration system with various refrigerants

2019

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In this experimental work, entropy generation minimization and exergy destruction minimization concepts have been applied on vapour compression refrigeration system. For that, entropy generations and exergy destructions have been found for each component of vapour compression refrigeration system; compressor, condenser, expansion device and evaporator, and also for whole system at different time intervals with various refrigerants. Refrigerants R134a, R600a, 95%R134a + 5%R290, 90%R134a + 10%R290, 85%R134a + 15%R290 and 85%R134a + 15%R152a blend refrigerants have been chosen for this experimental research work. Percentages increments/decrements for the entropy generations and exergy destructions have also been calculated to find best conditions and refrigerant, with developed computer software which eliminate hectic calculations and human mistakes. Minimum entropy generation (i.e. 533.64 J/kgK) and exergy destruction (i.e. 160090.8 J/kg) for the system have been found for R134a, and componentwise least entropy generations and exergy destructions have also been obtained with R134a but it affects environment. After this experimental work, 85%R134a + 15%R290 blend or R600a refrigerants have been recommended for refrigeration systems because of least percentage increments for entropy generation and exergy destruction. R134a as refrigerant is generally used in the refrigerating systems but it has high global warming potential (1430 GWP), so it should be replaced by alternative ecofriendly refrigerant and R600a is favourable which has zero ozone depletion potential and least global worming potential.

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Optimization of a multistage vapor-compression refrigeration system for various refrigerants

Cited by 81 publications

References 32 publications

A Review on Energy and Exergy Analysis of Two-Stage Vapour Compression Refrigeration System

A Review on Energy and Exergy Analysis of Two-Stage Vapour Compression Refrigeration System

Superstructure-Based Optimization of Vapor Compression-Absorption Cascade Refrigeration Systems

Entropy generation and exergy destruction analyses for vapour compression refrigeration system with various refrigerants

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