E3S Web Conf.
Volume 194, 20202020 5th International Conference on Advances in Energy and Environment Research (ICAEER 2020)
|Number of page(s)||5|
|Section||Energy Engineering and Energy Development and Utilization|
|Published online||15 October 2020|
Evaluation of a counter-flow microchannel heat exchanger performance with air-water vapor mixture to liquid water
1 School of Energy& Mechanical Engineering, Shanghai University of Electric Power, Shanghai 200090
2 School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093
* Corresponding author: email@example.com
Given its configuration and operation conditions, the performance of a counter-flow microchannel heat exchanger (MCHX) is evaluated through detailed calculations. The fluids, both liquid water and air, are considered as continuum flow flowing in microchannels. The MCHX has 59 sheets, and each sheet has 48 microchannels. The microchannels for both fluids have the same cross section of 0.8mm×1mm and same length of 200mm. Log mean temperature difference method is adopted for this evaluation. Using appropriate equations, the properties of air-water vapor mixture are calculated based on that of the two components. Given the inlet temperature for liquid water(35℃) and air (170℃),the calculated outlet temperature for both fluids are 55.5℃ and 43.3℃, respectively. The results also show that the air at the outlet is saturated. The overall heat transfer coefficient reaches 100W/m2ꞏK, which is much higher than that of conventional heat exchanger with similar fluid combinations.
© The Authors, published by EDP Sciences, 2020
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