Journal
APPLIED THERMAL ENGINEERING
Volume 40, Issue -, Pages 236-247Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2012.02.019
Keywords
Microchannels; Flow maldistribution; Thermal cross talk; Parallel plates
Funding
- Programme Commission on Energy and Environment (EnMi) [2104-06-0032]
- Danish Council for Strategic Research
- The Danish Council for Independent Research - Technology and Production Sciences [10-092791]
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The effect of flow maldistribution on the performance of microchannel parallel plate heat exchangers is investigated using an established single blow numerical model and cyclic steady-state regenerator experiments. It is found that as the variation of the individual channel thickness in a particular stack (heat exchanger) increases the actual performance of the heat exchanger decreases significantly, deviating from the expected nominal performance. We show that this is due to both the varying fluid flow velocities in each individual channel and the thermal cross talk between the channels transverse to the direction of the flow. (C) 2012 Elsevier Ltd. All rights reserved.
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