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The effect of air side fouling on thermal‐hydraulic characteristics of a compact heat exchanger
Author(s) -
Lankinen Raija,
Suihkonen Juhani,
Sarkomaa Pertti
Publication year - 2003
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.880
Subject(s) - heat exchanger , fouling , plate heat exchanger , shell and tube heat exchanger , dynamic scraped surface heat exchanger , plate fin heat exchanger , heat transfer , reynolds number , micro heat exchanger , materials science , thermodynamics , chemistry , heat transfer coefficient , mechanics , critical heat flux , turbulence , biochemistry , physics , membrane
The performance of a cross‐counterflow, gas–liquid heat exchanger was studied experimentally with a full‐scale test apparatus. The gas‐side heat transfer surface was equipped with needle‐shaped fins. The main purpose of the research was to define the heat transfer efficiency, as well as the external and internal pressure drops and the effect of the fouling on the thermal‐hydraulic characteristics of the heat exchanger. The Reynolds number of moist air in the channel, before the heat exchanger, varied between 60 000 and 150 000. Four different liquid mixtures were used as a heat transfer liquid. The velocity of liquid inside the tubes was set between 0.5 and 1.25 m s −1 . Then the Reynolds number varied from 500 to 1500 with propylene glycol—water mixture, from 3000 to 8000 with potassium formiate—water mixtures and from 5000 to 30 000 with water. The finned outside surface of the heat exchanger was fouled by two kinds of test dust; pure quartz and standard test dust. Copyright © 2003 John Wiley & Sons, Ltd.