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- W2940485924 abstract "Microscale heat exchangers are becoming an important area of interest in many fields of developing technology that require compact high heat energy removal solutions. In our work, numerical and experimental analyses are carried out for rectangular microchannels with five sets of rectangular configurations, in order to find optimum configuration of a microchannel. Analysis of a rectangular microchannel is carried out for the forced convection heat transfer condition with a constant base area of 30-mm length and 20-mm width. An experimental setup has been developed to test the microchannel with differential pressure transducers, J-type thermocouples, and a digital magnetic rotameter with microchannel manifold. A theoretical analysis was carried out with a C program code to find out the optimum theoretical dimension of the microchannel at various flow rates from 0.0016 kg/s to 0.1 kg/s. Experiments were carried out with heat inputs of 25 W to 150 W and flow inputs of 0.0016 kg/s to 0.1 kg/s. It was found that the heat transfer coefficient for a hydraulic diameter of 260 μm is equal to 12,000 W/m2·K. As compared to other configurations, the heat transfer coefficient is higher, so that the 260-μm diameter microchannel is more optimistic theoretically as compared to other configurations of a microchannel. Also, as the heat input increases, the configuration with a larger hydraulic diameter shows a less pressure drop as compared to a hydraulic diameter of 260 μm. The range of pressure drop for a microchannel is observed at 0.026 kPa. For a hydraulic diameter of 370 μm, the pressure drop is minimum, 0.01 kPa. Experimental results show that for a 30-mm-long microchannel with a hydraulic diameter of 260 μm, the temperature rise for the refrigerant R22 is in a range of 2°C to 18°C in the analysis of a single-phase refrigerant. The results for experimental temperature difference across the microchannel is 10 to 20% less as compared to theoretical results. The range of applicability allows a comparison of the refrigerant distribution in different designs of microchannel heat exchangers." @default.
- W2940485924 created "2019-05-03" @default.
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- W2940485924 date "2019-01-01" @default.
- W2940485924 modified "2023-09-23" @default.
- W2940485924 title "ANALYSIS OF A RECTANGULAR MICROCHANNEL USING THE R-22 REFRIGERANT IN FORCED CONVECTION HEAT TRANSFER CONDITION" @default.
- W2940485924 doi "https://doi.org/10.1615/interjenercleanenv.2016015640" @default.
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