EXPERIMENTAL PERFORMANCE OF R134a AND R152a USING MICROCHANNEL CONDENSER

Bhatkar, Vijay W.

doi:10.18186/jte.55930

Cited by 9 publications

(9 citation statements)

References 24 publications

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“…(12). It is noticed that, the percentage increase achieved by Patil et al [1] was 65%, Yun et al [2] achieved percentage increase of 84% while Bhatkar, et al [8] achieved 18%. The figure indicates that percentage increase in pressure drop achieved by the present work is nearly close to that obtained by [8] and less than that obtained by the other two.…”

Section: Fig 11 Effect Of Ambient Temperature On Condenser Pressure mentioning

confidence: 99%

“…However, the heat convection coefficient obtained by Kim correlation is less than that of this work by about (2.2:3.4 %). [14] and Shah [15] correlations (8) and 9…”

Section: Fig 14 Comparison Of Convective Transfer Coefficient Calculmentioning

confidence: 99%

“…Bhatkar, et al [8] investigated experimentally the performance of compression refrigeration system using microchannel condenser with R134a and drop in substitute R152a with aluminum microchannel condenser at condensation temperature of 48 °C and evaporation temperature varied from -10 to 15 °C. It was found that, the product of overall heat transfer coefficient and surface area of the condenser (UA) were more for microchannel condenser than conventional condenser.…”

Section: -Introductionmentioning

confidence: 99%

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An Investigation of Using Michrochannel Condenser to ‎Improve the Performance of Air Conditioning Unit

Abdel-Baky

Mousa

Koraim

2020

ERJ. Engineering Research Journal

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In the recent years, many researches have been focused towards the new technology in heat exchangers. Besides, the economy of manufacturing takes up a great attention of scientific works. Through this work the use of microchannel condenser achieves increase in energy. The study was conducted on two air conditioning units utilize R-22 as a refrigerant and having different cooling capacities 3516 W and 5274 W. The results showed that the use of microchannel condenser achieves increase in Energy Efficiency Ratio (EER) which reflected on the total efficiency of the device and reduce energy cost. The obtained results indicated that, the use of microchannel condenser led to increase in EER by (4.3:11.3%) for the first unit and and (9.5:29%) for the second one compared with that unit use FTC. Also, the use of MChC led to decrease the pressure drop by (20%:30%) while the convective heat transfer coefficient is improved by (61.6:84.1%).

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Section: Fig 11 Effect Of Ambient Temperature On Condenser Pressure mentioning

confidence: 99%

“…However, the heat convection coefficient obtained by Kim correlation is less than that of this work by about (2.2:3.4 %). [14] and Shah [15] correlations (8) and 9…”

Section: Fig 14 Comparison Of Convective Transfer Coefficient Calculmentioning

confidence: 99%

Section: -Introductionmentioning

confidence: 99%

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An Investigation of Using Michrochannel Condenser to ‎Improve the Performance of Air Conditioning Unit

Abdel-Baky

Mousa

Koraim

2020

ERJ. Engineering Research Journal

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“…Many researchers have reported that refrigerant R290 and its mixtures performs well and can be a better substitute to CFC and HCFC refrigerants in various applications [8][9][10][11][12][13][14][15][16][17][18][19].Purkayasthaet. al.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Hydrocarbon R290 in Water Cooler Refrigeration System

Choudhari¹

2020

Journal of Thermal Engineering

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Environment friendly hydrocarbon R290 is one of the options for the next generation refrigeration systems. In warm climatic countries, water cooler is the widely used refrigeration application and R22 is the predominantly used refrigerant in these refrigeration systems. In accordance with international agreements, use of refrigerant R22 is to be stopped on urgent basis because of its environmental concerns, ozone depletion and global warming. This paper presents an experimental study on the performance of laboratory water cooler charged with environment friendly refrigerant R290. A laboratory water cooler of nominal cooling capacity 1.5 kW is developed. Pull down tests and energy consumption tests at condensing temperatures of 38°C, 43°C, and 48°C is conducted as per Indian standard IS1425 (Part 1): 2001. Performance parameters such as pull-down time, pressure ratio, discharge gas temperature, average compressor energy consumption, energy consumption over a period of 24 hours, coefficient of performance and performance parameter of the water cooler refrigeration system are measured. Observed performance parameters also proved the compatibility of mineral oil with refrigerant R290. The overall performance of the developed water cooler suggests refrigerant R290 as a better long-term alternative refrigerant for water cooler applications.

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“…While, the refrigerant charge amount for the system with the microchannel condenser was 9.2% smaller than that with the round-tube condenser. Bhatkar et al [6] studied in the performance of of R134a and R152a using aluminum microchannel condenser experimentally. The experiments were carried out for condensation temperature of 48°C while evaporation temperature varied from -10 to 15°C.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Cooling Water on Condensation of Microchannels

Doan¹,

Dang²

2017

IJERMT

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Abstractn this paper, the influences of cooling water on the performance of square microchannel condenser were studied experimentally. There are 10 square microchannels with the hydraulic diameter of D h = 500µm in the condenser. The experiments were carried out in both case of vertical microchannel condender and case of horizontal one. The ranges of parameters examined: mass flow rate of water and steam from 2 [g/s] to 3 [g/s] and from 0.02 [g/s] to 0.08 [g/s], respectively. When compared the data for vertical microchannels, the capacity and temperature fluctuation of cooling water for the horizontal microchannels are the same; however, the pressure drop of vertical microchannels is lower than horizontal microchanels and the performance index of vertical microchannels is higher than horizontal one. Besides, in the fixed conditions, the pressure drop of steam increases with the increasing of mass flow rate of water.Keywords-square microchannels condenser, mass flow rate of water, vertical microchannels, horizontal microchannels, cooling water. I. INTRODUCTIONHeat transfer and fluid flow phenomena of two phase flow in microchannels are interesting topics in recent years. Regarding to this fields, Sur and Liu [1] studied adiabatic air -water two-phase flow in circular microchannels. Four basic flow patterns (bubbly flow, slug flow, ring flow, and annular flow) were observed with inner diameters of 100, 180 and 324 µm. The effects of channel size and superficial phasic velocity on the two-phase flow pattern and pressure drop of air -water mixture were done experimentally. The results showed the flow pattern-based models which provide the best prediction of the two-phase pressure drop in the microchannels. Hasan et al.[2] studied in the effect of microchannel shapes on its performances for different channel cross-sections (circular, square, rectangular, iso-triangular and trapezoidal). The simulations (FVM-Finite Volume Method) showed that for the same volume of a heat exchanger, the circular channels give the best overall performance (thermal and hydraulic); however, the rectangular channels give lowest pressure drop. Mohammed et al. [3] investigated in the performances of differential channel shapes of microchannel heat sink -MCHS (Zigzag, step, straight, and wavy MCHS). They concluded that at the same cross-section of a MCHS, the heat transfer coefficient of the zigzag MCHS is the greatest. However, the zigzag MCHS has the highest value of pressure drop, friction factor, and wall shear stress. Chung and Kawaji [4] investigated in the effect of diameters on adiabatic two-phase flow characteristics in microchannels. The experiments were carried out with a mixture of nitrogen gas and water in circular channels with diameters of 530, 250, 100, and 50 m. In this paper, the gas and liquid flow rates were varied, the images of the two-phase flow patterns captured. Besides, they also examined the data of twophase friction pressure drop and void fraction. Park and Hrnjak [5] investigated in the effect of differential ty...

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EXPERIMENTAL PERFORMANCE OF R134a AND R152a USING MICROCHANNEL CONDENSER

Cited by 9 publications

References 24 publications

An Investigation of Using Michrochannel Condenser to ‎Improve the Performance of Air Conditioning Unit

An Investigation of Using Michrochannel Condenser to ‎Improve the Performance of Air Conditioning Unit

Experimental Study of Hydrocarbon R290 in Water Cooler Refrigeration System

The Effect of Cooling Water on Condensation of Microchannels

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