Journal
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
Volume 48, Issue 25-26, Pages 5089-5102Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijheatmasstransfer.2005.08.008
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Data reduction methods for wet- and frosted-surface heat exchangers are reviewed, and logarithmic-mean temperature difference (LMTD) and logarithmic-mean enthalpy difference (LMED) methods for data interpretation are formulated, including fin efficiency expressions for flat-tube heat exchangers with constant-area fins. With these improved formulations for data interpretation in place, the two methods are compared using a numerical simulation of a flat-plate heat exchanger. For all conditions considered-spanning wet and frosted surfaces-the new UA-LMTD method provides the air-side convective heat transfer coefficient to within 3% and is more accurate than the HA-LMED method, which results in large errors under some conditions. (c) 2005 Elsevier Ltd. All rights reserved.
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