FROSTING PERFORMANCE OF TUBE FIN HEAT-EXCHANGERS WITH WAVY AND CORRUGATED FINS

被引：57

作者：

KONDEPUDI, SN

ONEAL, DL

机构：

[1] Architectural Engineering Program, Department of Civil and Architectural Engineering, Drexel University, Philadelphia, PA

[2] Mechanical Engineering Department, Texas A and M University, College Station, TX

来源：

EXPERIMENTAL THERMAL AND FLUID SCIENCE | 1991年 / 4卷 / 05期

关键词：

FROST GROWTH; TUBE FIN HEAT EXCHANGERS; FINS; ENERGY TRANSFER COEFFICIENT;

D O I：

10.1016/0894-1777(91)90040-X

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

An experimental investigation was made into the effects of frost growth on the thermal performance of fin tube heat exchangers with wavy and corrugated fins. Although previous studies on frosting in heat exchangers have dealt with flat fins, there are few data on wavy or corrugated fins. Frost accumulation, pressure drop across the heat exchanger, and an energy transfer coefficient based on a logarithmic mean enthalpy difference (LMED) were quantified in terms of air humidity, fin type, and fin spacing. It was found that higher air humidity and fin density lead to more frost growth and higher pressure drops. These general trends are consistent with what has been reported in the literature. Contrary to earlier literature reports, the energy transfer coefficient was approximately constant for the duration of the test. In addition, it was found that the latent portion of the overall energy transfer process was approximately 40% of the total.

引用

页码：613 / 618

页数：6

共 12 条

[1]

O'Neal, Tree, A Review of Frost Formation in Simple Geometries, ASHRAE Trans., 91, 2, pp. 267-282, (1985)

[2]

Kondepudi, O'Neal, The Effects of Frost Growth on Extended Surface Heat Exchanger Performance—A review, ASHRAE Trans., 93, 2, pp. 258-274, (1987)

[3]

Stoecker, How Frost Formation on Coils Affects Refrigeration Systems, Refrig. Eng., pp. 42-46, (1957)

[4]

Stoecker, Frost Formation on Refrigeration Coils, ASHRAE Trans., 66, pp. 91-103, (1960)

[5]

Hosoda, Uzahashi, Effects of Frost on the Heat Transfer Coefficient, Hitachi Rev., 16, 6, pp. 254-259, (1967)

[6]

Gatchilov, Ivanova, Characteristics of the Frost Formed on the Surface of Finned Air Coolers, Proceedings of the XV International Congress of Refrigeration, 2-71 B, pp. 1-5, (1979)

[7]

Gates, Huffman, Sepsy, Heat Transfer and Pressure Loss in Extended Surface Heat Exchangers Operating Under Frosting Conditions, ASHRAE Trans., 73, pp. I.2.1-I.2.13, (1967)

[8]

Gates, Huffman, Sepsy, Heat Transfer and Pressure Loss in Extended Surface Heat Exchangers Operating Under Frosting Conditions, ASHRAE Trans., 73, pp. I.3.1-I.3.16, (1967)

[9]

Kondepudi, The Effects of Frost Growth on Finned Tube Heat Exchangers Under Laminar Flow, Ph.D. Dissertation, (1988)

[10]

Sanders, The Influence of Frost Formation and Defrosting on the Performance of Air Coolers, Ph.D. Dissertation, (1974)

← 1 2 →