An Experimental Analysis of Liquid Air Jet Pump

Bhatkar, Vijay W.; Sur, Anirban

doi:10.5098/hmt.17.12

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…al.2016). However, the amount of heat flux has increased exponentially after the semiconductor revolution owing to the size reduction of the system V. (W. Bhatkar, et. al.…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Review on Microchannel Heat Exchangers, Heat Sink, and Polymer Heat Exchangers: Current State of the Art

Sur¹,

Gulia²

2022

Frontiers in Heat and Mass Transfer

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Over the past few decades, the world is moving towards miniature products owing to the technological developments in variegated industrial domains such as aerospace, biomedical, electronics, etc. This has led to the exponential growth of efficient micro cooling systems which are light in weight and have effective thermal performance. Microchannel Heat Sinks and Microchannel Heat Exchangers are the widely adopted solutions for such efficient micro cooling systems. This paper comprehensively reviews the recent developments in the field of Microchannel Heat Sinks and Microchannel Heat Exchangers. Initially, the concept of microchannel cooling is discussed. Further, a comprehensive review of materials, fabrication methods, experimental investigation, and numerical analysis is presented.

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“…al.2016). However, the amount of heat flux has increased exponentially after the semiconductor revolution owing to the size reduction of the system V. (W. Bhatkar, et. al.…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Review on Microchannel Heat Exchangers, Heat Sink, and Polymer Heat Exchangers: Current State of the Art

Sur¹,

Gulia²

2022

Frontiers in Heat and Mass Transfer

Self Cite

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“…In most of heating, ventilating, air conditioning and refrigeration (HVACR) industries, R134a refrigerant is used which is having GWP of 1300 much more than ecological norms. Bhatkar et al ( , 2015Bhatkar et al ( , 2021 found that there is no ideal refrigerant for any specific application. While selecting the refrigerant, compromise between thermodynamic, chemical, physical, operating and environmental properties are to be considered.…”

Section: Introductionmentioning

confidence: 99%

Exergy Analysis of a Refrigeration System With a Minichannel Condenser Using R134a Refrigerant

Bhatkar¹,

Sur²,

Roy³

2022

Front. Heat Mass Transf.

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Versatile vapor compression refrigeration system is designed, developed and fabricated such that desired condensing and evaporating temperatures can be obtained by providing different electronic controls for superheating, subcooling, fan speed, air heaters and water heaters to use alternative refrigerants to R134a such as R1234ze, R152a, R600a, R290 and R290/R600a (50/50%) with conventional and minichannel condenser. All the refrigerant are tested for condensing temperature ranging from 40 °C to 55 °C while evaporating temperature changes from -10 °C to 15 °C for both condensers. The total exergy loss for main system components such as compressor, condenser, expansion valve and evaporator are calculated. It is found that condenser represented maximum exergy loss in all refrigerants for conventional and minichannel condenser. The total exergy loss is more for conventional condenser than minichannel condenser for all refrigerants while R1234ze represented minimum exergy loss. Exergy efficiency for minichannel condenser is more than conventional condenser for R1234ze over other refrigerants at all condensing and evaporating temperatures. The condensation temperature reduced by 3 °C with the minichannel condenser over conventional condenser resulted into increase in coefficient of performance (COP) by 10% to 15% for different evaporating temperatures. Thus, it is concluded that R1234ze is direct drop-in substitute to R134a as compared to R152a, R600a, R290 and R290/R600a (50/50%) considering exergy loss, exergy efficiency and COP with minichannel condenser over conventional condenser.

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Study of refrigeration system with minichannel condenser using R1234ze, R134a, R152a, R600a, R290 and mixture of R290/R600a (50/50)

Bhatkar¹,

Sur

Kumar

2023

Proceedings of the Institution of Mechanical Engineers, Part E:

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A versatile vapor compression refrigeration (VCR) system is designed, developed and manufactured for testing different alternative refrigerants to R134a. The refrigerants such as R1234ze, R152a, R600a, R290 and mixture of R290/R600a (50/50) refrigerants are tested with an aluminum minichannel condenser which is designed for R134a. All the refrigerants are experimented for condensation temperature varying from 40 to 55°C while evaporation temperature varying from −10 to +15°C for every condensing temperature. The performance parameters like volumetric refrigerating capacity, actual work consumption of compressor, coefficient of performance (COP) and condenser capacity are compared for different alternative refrigerants. Aluminum minichannel condenser has reduced condensing temperature by 2–3°C with an increase in COP by 10%. The ratio of volumetric refrigerant capacities for R152a, R1234ze, R600a, R290 and HC mixture of R290/R600a (50/50) with respect to R134a are found to be 1.296, 1.143, 0.736, 1.749 and 1.067, respectively which is useful to select specific compressor. The ratio of compressor work for R600a, R290, HC mixture of R290/R600a, R152a and R1234ze with respect to R134a are found to be 1.81, 1.812, 1.867, 1.6 and 1.1, respectively. The ratios of condenser capacity of R600a, R290, HC mixture of R290/R600a, R152a and R1234ze with respect to R134a are found to be 1.914, 2.061, 1.939, 1.65 and 1.064, respectively. It is found that COP of R152a, R600a and R1234ze are larger by 11.53, 5.38 and 27% over R134a whereas COP of R290/R600a (50/50) and R290 are decreased by 0.75% and 14.23% over R134a, respectively. The exergy loss analysis for VCR system components is carried out at condensing temperature of 44°C while evaporating temperature ranging from −10 to +15°C for all the refrigerants and found that total exergy loss is more for R600a among all refrigerants.

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An Experimental Analysis of Liquid Air Jet Pump

Cited by 4 publications

References 6 publications

A Comprehensive Review on Microchannel Heat Exchangers, Heat Sink, and Polymer Heat Exchangers: Current State of the Art

A Comprehensive Review on Microchannel Heat Exchangers, Heat Sink, and Polymer Heat Exchangers: Current State of the Art

Exergy Analysis of a Refrigeration System With a Minichannel Condenser Using R134a Refrigerant

Study of refrigeration system with minichannel condenser using R1234ze, R134a, R152a, R600a, R290 and mixture of R290/R600a (50/50)

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