The influence of recycle on a parallel-plate heat exchanger with insulation sheet inserted for double-pass operations |
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| Affiliation: | 1. School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China;2. Department of Civil Engineering, Case Western Reserve University, Cleveland, OH 44106, USA;1. Laboratory of Heat and Mass Transfer (LTCM), École Polytechnique Fédérale de Lausanne (EPFL), EPFL-STI-IGM-LTCM, Station 9, Lausanne CH-1015, Switzerland;2. Swiss Federal Laboratories for Materials Science and Technology (Empa), Feuerwerkerstrasse 39, Thun, CH-3602 Bern, Switzerland |
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| Abstract: | The influence of recycle on a parallel-plate heat exchanger of inserting in parallel an insulation sheet to divide an open duct into two channels for double-pass operations with uniform wall temperature has been studied analytically. The results are represented graphically and compared with those in an open duct (without an inserted insulation sheet) and a double-pass without recycle. Substantial improvement in heat transfer is obtainable by employing such a double-pass device with external refluxes, instead of using an open conduit with single-pass operations and using double-pass operations without recycle. The effect of insulation-sheet location on the enhancement of heat transfer efficiency as well as on the increment of power consumption, has been also discussed. |
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