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Heat transfer with geometric shape of micro-fin tubes (I) - Condensing heat transfer

Journal Article:

Abstract

To examine the enhancement mechanism of condensing heat transfer through microfin tube, the condensation experiments with refrigerant HCFC 22 are performed using 4 and 6 kinds of microfin tubes with outer diameter of 9.52 mm and 7.0 mm, respectively. Used microfin tubes have different shape and number of fins with each other. The main heat transfer enhancement mechanism is known to be the enlargement of heat transfer area and turbulence promotion. Together with these main factors, we can find other enhancement factors by the experimental data, which are the overflow of the refrigerant over the microfin and microfin arrangement. The overflow of the refrigerant over the microfin can be analyzed by the geometric shape of the microfin. microfin tubes having a shape which can give much overflow over the microfin show large condensing heat transfer coefficients. The effect of microfin arrangement is related to the heat transfer resistance of liquid film of refrigerant. The condensing heat transfer coefficients are high for the microfin tube with even distribution of liquid film. 17 refs., 14 figs., 3 tabs.
Authors:
Kwak, K M; Chang, J S; Bai, C H; Chung, M [1] 
  1. Yeungnam University, Kyungsan (Korea)
Publication Date:
Nov 01, 1999
Product Type:
Journal Article
Reference Number:
EDB-01:063688
Resource Relation:
Journal Name: Korean Journal of Air-Conditioning and Refrigeration Engineering; Journal Volume: 11; Journal Issue: 6; Other Information: PBD: Nov 1999
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; HEAT TRANSFER; FILMS; PRESSURE DROP
OSTI ID:
20176650
Country of Origin:
Korea, Republic of
Language:
Korean
Other Identifying Numbers:
Journal ID: ISSN 1225-1720; TRN: KR01E01487
Submitting Site:
KR
Size:
page(s) 774-788
Announcement Date:

Journal Article:

Citation Formats

Kwak, K M, Chang, J S, Bai, C H, and Chung, M. Heat transfer with geometric shape of micro-fin tubes (I) - Condensing heat transfer. Korea, Republic of: N. p., 1999. Web.
Kwak, K M, Chang, J S, Bai, C H, & Chung, M. Heat transfer with geometric shape of micro-fin tubes (I) - Condensing heat transfer. Korea, Republic of.
Kwak, K M, Chang, J S, Bai, C H, and Chung, M. 1999. "Heat transfer with geometric shape of micro-fin tubes (I) - Condensing heat transfer." Korea, Republic of.
@misc{etde_20176650,
title = {Heat transfer with geometric shape of micro-fin tubes (I) - Condensing heat transfer}
author = {Kwak, K M, Chang, J S, Bai, C H, and Chung, M}
abstractNote = {To examine the enhancement mechanism of condensing heat transfer through microfin tube, the condensation experiments with refrigerant HCFC 22 are performed using 4 and 6 kinds of microfin tubes with outer diameter of 9.52 mm and 7.0 mm, respectively. Used microfin tubes have different shape and number of fins with each other. The main heat transfer enhancement mechanism is known to be the enlargement of heat transfer area and turbulence promotion. Together with these main factors, we can find other enhancement factors by the experimental data, which are the overflow of the refrigerant over the microfin and microfin arrangement. The overflow of the refrigerant over the microfin can be analyzed by the geometric shape of the microfin. microfin tubes having a shape which can give much overflow over the microfin show large condensing heat transfer coefficients. The effect of microfin arrangement is related to the heat transfer resistance of liquid film of refrigerant. The condensing heat transfer coefficients are high for the microfin tube with even distribution of liquid film. 17 refs., 14 figs., 3 tabs.}
journal = {Korean Journal of Air-Conditioning and Refrigeration Engineering}
issue = {6}
volume = {11}
journal type = {AC}
place = {Korea, Republic of}
year = {1999}
month = {Nov}
}