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In the present study, the possibility of using refrigerant blends of RE 170, R152a
and R600a as alternative to the refrigerants R12 and R134a in domestic refrigerators
working on Vapour Compression System has been assessed theoretically. R134a is
currently used as the refrigerant in refrigerator replacing the ozone depleting refrigerant
R12. Althou...
Context in source publication
Context 1
... changes in evaporating pressure (P evap) and pressure ratio with the evaporation temperature (T evap ) were shown in fig 5 and 6 for listed refrigerants. The pressure ratio of refrigerant mixture1 and mixture2 substituted for R12and R134a was 10.61% higher and 8.07% lower than that of R12 and R134a respectively as shown in table 2 for the constant condensation and evaporation temperatures of 50⁰C and -10⁰C respectively. ...
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The environmental problems of ozone depletion and global warming are of major concern in the world. Refrigeration and airconditioning have been identified as major causes for ozone layer depletion and global warming. Thus, there is a great need to search for alternative refrigerants which can be used to replace the conventional CFC and HFC refriger...
In present scenario, most of the industrial and domestic refrigerators working on vapour compression refrigeration cycle are equipped with R134a as a refrigerant. R134a is having zero ozone depletion potential, but it has high global warming potential of 1300.Hence there is need identified for alternative refrigerant to R134a. This research work is...
In the present study, the possibility of using refrigerant blend of RE170 and R600a as alternative to the refrigerant R134a in domestic refrigerator working on Vapour Compression System has been assessed theoretically. R134a is currently used as the refrigerant in refrigerator replacing the ozone depleting refrigerant R12. Although R134a has no ozo...
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Citations
... Many researchers conducted various experimental works in the domestic refrigerator to enhance the performance of the system with low GWP refrigerants and blend with R134a as a forthcoming alternative replacement in the refrigeration system 12-23 . Baskaran et al. [24][25][26][27][28][29][30][31][32][33][34][35] examined the performance of several eco-friendly refrigerants and combinations with R134a as a prospective alternative replacement in various tests on a vapour compression refrigeration system. Tiwari et al. 36 used experimental and CFD analysis to compare the performance of capillary tubes with different refrigerants and tube diameters. ...
The household heating and cooling system often use the capillary device. The use of the helical capillary eliminates the need for lightweight refrigeration devices in the system. Capillary pressure is noticeably affected by the capillary geometric parameters, such as length, mean diameter, and pitch. This paper is concerned with the effects of the capillary length on the performance of the system. Three separate length capillary tubes were used in the experiment. The data on R152a were studied under various conditions to assess the impact of varying the length. Maximum COP is obtained at an evaporator temperature of − 12 °C and capillary length of 3.65 m. The result is drawn that the system performance enhances when the capillary length is improved to 3.65 m when compared to 3.35 m and 3.96 m. As a result, as the capillary length increases up to a specific amount, the system's performance improves. The findings from the experiment were compared with those from the computational fluid dynamics (CFD) analysis.
... All nanolubricants based on TiO 2 have been observed to reduce average power consumption. Baskaran et al. [16][17][18][19][20][21][22][23][24][25][26][27] evaluated the performance of a vapour compression refrigeration device using a variety of different refrigerants (including refrigerant mixtures) and nanorefrigerants, and their findings were compared to those obtained by using R134a as a potential alternative replacement. An investigative test rig is indigenously created and manufactured to conduct the examinations. ...
This study investigates the performance of nanorefrigerants (R134a-ZrO 2) in a domestic refrigerator at a concentration of 0.2 g/l without changing the components. Nanoparticles of ZrO 2 of 0.2 g/L concentration with particle size 1-10 nm and 140 g of R134a have been charged, and investigations were carried out. Energy consumption and pull-down tests were conducted to investigate the performance of the refrigerator. The performance parameters like refrigeration capacity, compressor power, discharge temperature, coefficient of performance, and energy consumption were investigated for the nanorefrigerant (R134a-ZrO 2), and the results were compared with base refrigerant R134a. The pull downtime, energy consumption, and discharge temperature are reduced with increased COP and compressor power when the system is operated with R134a-ZrO 2 nanorefrigerant. Also, the thermophysical properties of the nanorefrigerant (R134a-ZrO 2) are calculated and analyzed for the various volume fraction of nanoparticles.
... Baskaran et al. [8][9][10][11][12][13] investigated the first and second law efficiency of a vapour compression refrigeration system using a variety of refrigerant mixtures, including HFC152a, HC290, HC600a, and RE170, and compared their findings to those obtained with R134a, which was considered a potential alternative replacement. ...
In this paper, various eco-friendly refrigerant mixtures R430A, R436A, R436B, R435A, and R510A used in vapour compression refrigeration systems are considered for this study. All of them have zero ODP and very low GWP. On the basis of exergy features, the efficiency of various working fluids in vapour compression refrigeration cycles was compared. The exergy efficiency of mixtures is evaluated for various evaporating temperatures ranging from -40°C to -5°C at a constant condensation temperature of 45°C. The variation of exergy is also analyzed for various condensation temperatures ranging from 25°C to 60°C at a constant evaporating temperature of -10°C. The exergy losses in various components are computed and presented in Grassmann diagrams for a cooling load of 1 kW. The results indicate that all the investigated alternative refrigerant mixtures have higher exergy efficiency than R134A. The maximum exergy performance is 39.72% observed for the mixture R435A at an evaporation temperature of -30°C, and this value is 9.89% higher than that of R134a.The results also show that the highest and lowest exergy losses have occurred in the compressor and evaporator.
... Dnyaneshwar M. A. et al. [5] worked on exploring of environmental friendly alternative refrigerants for the R-12, R-22 and R134a for low GWP and negligible ODP, and a better coefficient of performance (COP). Baskaran and Mathews [6] assessed theoretically and found the possibility of using refrigerant blends of RE170, R152a and R600a as alternatives to the refrigerants like R12 and R134a. Jagnarayan R. et al. [7] experimentally investigated replacement of R134a and Agrawal N. et al. [8] analyzed system performance of existed R134a domestic refrigerator with propane/isobutane (50/50%) zeotropic blend was measured as a drop-in substitute. ...
R12 had been widely used as a refrigerant for many decades but it has high ozone depletion potential and global warming potential hence it was replaced by R134a which has zero ozone depletion potential and very less global warming potential compared to R12, and also the performance of R134a is much better in vapour compression refrigeration system. Nowadays, R134a is being widely used as a refrigerant in domestic and industrial applications but to optimize the system performance and further protect our environment from global warming R134a should be replaced. This research work determines possibility of a case that can replace R134a. For this purpose, R600a and hydrocarbon (blend of R290 and R600a) have been used as refrigerants separately. These refrigerants have zero ozone depletion potential and almost negligible global warming potential. The performances of three refrigerants (R134a, R600a and hydrocarbon blend) have been analyzed on vapour compression refrigeration system at different thermostat positions (i.e. different suction and discharge pressures). Further, Carnot COPs and second law efficiencies of these three refrigerants have also been calculated to find best operating conditions for the system. This experiment research work has been concluded as; maximum coefficient of performance (i.e. 3.33) and second law efficiency (i.e. 58.94%) are found with R600a at 12.9 psi suction and 99.7 psi discharge pressures but minimum coefficient of performance (i.e. 1.99) and second law efficiency (i.e. 43.83%) are obtained with R134a experimentally. So, R600a has been recommended as alternative refrigerant for vapour compression refrigeration systems.
... Baskaran et al. [10][11][12][13][14][15][16][17][18] analyzed the performance of a vapor compression refrigeration system with DME and its blends. The results were compared with R134a as a possible alternative refrigerant. ...
In this study, the first and second law analysis of Dimethyl ether (DME) and its blend refrigerants (R429A, R435A, R 510A) is presented as an alternatives to R134a. A computational model, developed in cycle_D software, is employed for comparing the performance of these refrigerants in vapour compression refrigeration cycle. The thermodynamic properties of the DME and its blend refrigerants are computed using Refprop version 9.0. The parameters computed are volumetric refrigerating capacity, compressor discharge temperature, Co efficient of performance and exergy efficiency in system. The results indicate that VRC, COP and exergy efficiency for R134a are lower in comparison with R429A, R435A, R510A.
... Baskaran.et al. [8][9][10][11][12][13][14] reported the performance of a vapor compression refrigeration system with Di methyl ether and its blends. The results showed that the Di methyl ether and its blends have better performance when compared with R134a. ...
¬This study deals with the Thermodynamic evaluation of the use of Di-methyl ether refrigerants in household refrigeration systems which utilize R134a as a working fluid. A theoretical computational analysis was developed for R134a, Di-methyl ether (RE170) and the selected mixtures (R429A, R435A and R510A) in the standard refrigeration cycle ASHRAE, using the REFPROP 9.0 software. The results of computational simulations between the fluids were compared to find the evidence of the best alternative for R134a. In this sense, it is observed that the Di methyl ether reduced the levels of pressure on the condenser and evaporator. It also reduces the mass to be charged in the system. The use of these refrigerants reduces mass flow rate and increases refrigerating capacity of the system.
... Test results show that the energy consumption and the compressor discharge temperature of R510A is 22.3% and 3.7 0 C lower than that of HFC134a with 50% of the refrigerant charge, Overall, R510A is a new long term environmentally safe refrigerant, is a good alternative for HFC134a requiring little change in the refrigeration system of the domestic water purifiers. [12] Baskaran et al. [18][19][20][21][22][23][24][25] analyzed the performance of a vapor compression refrigeration system with low GWP refrigerants and its blends. The results were compared with R134a as a possible alternative refrigerant. ...
This communication deals with the exergetic analysis of a vapour compression refrigeration system with selected refrigerants. The various parameters computed are COP, exergetic efficiency and EDR in the system. Effects of condenser temperature, evaporator temperature and sub-cooling of condenser outlet, super-heating of evaporator outlet and effectiveness of vapour liquid heat exchanger are also computed and discussed. In this study, it was found that R429A has the better performance in all respect, whereas refrigerant mixture has lower performance.
