Atipoang Nuntaphan and Tanongkiat Kiatsiriroat

pp. 509 - 519

Abstract

Cross flow heat exchangers having crimped spiral fin and inline arrangement configurations under
dehumidification are studied. The effect of tube diameter, fin spacing, fin height, transverse tube pitch are
examined. From the experiment, it is found that the heat transfer and the frictional characteristics of the
heat exchanger under dehumidification is close to that of the non-dehumidifying process. However, the air
stream pressure drop and the heat transfer coefficient of the wet surface heat exchanger are higher and lower
than those of the dry surface respectively. Moreover, equations are developed for predicting the f and the j
factors of a tested heat exchanger. Results from the developed equations agree well with the experimental
data.