Frost formation in rotary heat and moisture exchangers

被引：20

作者：

Bilodeau, S ^{[1
]}

Brousseau, P ^{[1
]}

Lacroix, M ^{[1
]}

Mercadier, Y ^{[1
]}

机构：

[1] Univ Sherbrooke, Dept Genie Mecan, Sherbrooke, PQ J1K 2R1, Canada

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 1999年 / 42卷 / 14期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1016/S0017-9310(98)00323-8

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Frost formation in rotary heat and mass exchangers is investigated both experimentally and numerically. Experiments reveal that glazed frost, whose density and thermal conductivity are larger than that of rough frost, prevails in rotary exchangers operating in cold climates. A mathematical model for the prediction of the thermal behavior of the exchanger is presented. The model is validated with experimental data and employed to conduct a parametric study. Results indicate that the absolute humidity is the prevailing parameter to characterize the frosting phenomenon. A frost mass fraction chart is established in terms of the relative humidity of the warm exhaust stream and of the temperature of the cold supply stream. The transient three-dimensional model also shows that the absolute humidity and the temperature of both air flows vary nonlinearly in the frosted zone. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：2605 / 2619

页数：15

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