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Browsing Department of Mechanical Engineering by Author "Sarkar, Jahar"

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Energy, exergy and economic assessments of the dual-mode evaporative cooler for various international climate zones

Kashyap, Sarvesh; Sarkar, Jahar; Kumar, Amitesh (SAGE Publications Ltd, 2022-03)

The conventional desert cooler is effective for dry seasons and the regenerative evaporative cooler (REC) is an effective device for humid seasons in composite climate zones. Hence, the dual-mode evaporative cooler (a ...
Experimental hydrothermal behavior of hybrid nanofluid for various particle ratios and comparison with other fluids in minichannel heat sink

Kumar, Vivek; Sarkar, Jahar (Elsevier Ltd, 2020-01)

The effect of the particle mixture ratio in hybrid nanofluid on minichannel heat sink performance is analyzed experimentally. The heat sink, made of aluminium, contains nine parallel rectangular minichannels having cross ...
Performance characteristics of low global warming potential R134a alternative refrigerants in ejector-expansion refrigeration system

Mishra, Shubham; Sarkar, Jahar (Polish Academy of Sciences, 2016-12-01)

Performance assessment of ejector-expansion vapor compression refrigeration system with eco-friendly R134a alternative refrigerants (R152a, R1234yf, R600a, R600, R290, R161, R32, and propylene) is presented for air-conditioning ...
PERFORMANCE IMPROVEMENT OF DOUBLE-TUBE GAS COOLER IN CO2 REFRIGERATION SYSTEM USING NANOFLUIDS

Sarkar, Jahar (Serbian Society of Heat Transfer Engineers, 2015)

The theoretical analyses of the double-tube gas cooler in transcritical carbon dioxide refrigeration cycle have been performed to study the performance improvement of gas cooler as well as CO2 cycle using Al2O3, TiO2, CuO, ...
Transient thermo-hydraulics and performance characteristics of single-phase natural circulation loop using hybrid nanofluids

Chandra, Laltu; Sarkar, Jahar; Sahu, Mayaram (Elsevier Ltd, 2020-01)

Transient analysis of vertical heating and horizontal cooling rectangular single-phase natural circulation loop with various water-based hybrid nanofluids (Al2O3 + Ag, Al2O3 + Cu, Al2O3 + TiO2, Al2O3 + CNT, Al2O3 + Graphene) ...

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