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Condensation of refrigerants in horizontal, spirally grooved microfin tubes: Numerical analysis of heat transfer in the annular flow regime

Journal Article:

Abstract

A method is presented for estimating the condensation heat transfer coefficient in a horizontal, spirally grooved microfin tube. Based on the flow observation study performed by the authors, a laminar film condensation model in the annular flow regime is proposed. The model assumes that all the condensate flow occurs through the grooves. The condensate film is segmented into thin and thick film regions. In the thin film region formed on the fin surface, the condensate is assumed to be drained by the combined surface tension and vapor shear forces. In the thick film region formed in the groove, on the other hand, the condensate is assumed to be driven by the vapor shear force. The present and previous local heat transfer data including four fluids (CFC11, HCFC22, HCFC123, and HFCl34a) and three microfin tubes are found to agree with the present predictions to a mean absolute deviation of 15.1%.
Authors:
Publication Date:
Feb 01, 2000
Product Type:
Journal Article
Reference Number:
EDB-00:057402
Resource Relation:
Journal Name: Journal of Heat Transfer; Journal Volume: 122; Journal Issue: 1; Other Information: PBD: Feb 2000
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; AUGMENTATION; HEAT TRANSFER; AIR CONDITIONERS; REFRIGERATING MACHINERY; FILM CONDENSATION; FINS; ANNULAR SPACE; REFRIGERANTS
OSTI ID:
20067712
Research Organizations:
Okayama Prefecture Univ., Kuboki, Soja (JP)
Country of Origin:
United States
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0022-1481; JHTRAO; TRN: IM200029%%49
Submitting Site:
DELTA
Size:
page(s) 80-91
Announcement Date:
Jul 24, 2000

Journal Article:

Citation Formats

Nozu, S, and Honda, H. Condensation of refrigerants in horizontal, spirally grooved microfin tubes: Numerical analysis of heat transfer in the annular flow regime. United States: N. p., 2000. Web. doi:10.1115/1.521439.
Nozu, S, & Honda, H. Condensation of refrigerants in horizontal, spirally grooved microfin tubes: Numerical analysis of heat transfer in the annular flow regime. United States. doi:10.1115/1.521439.
Nozu, S, and Honda, H. 2000. "Condensation of refrigerants in horizontal, spirally grooved microfin tubes: Numerical analysis of heat transfer in the annular flow regime." United States. doi:10.1115/1.521439. https://www.osti.gov/servlets/purl/10.1115/1.521439.
@misc{etde_20067712,
title = {Condensation of refrigerants in horizontal, spirally grooved microfin tubes: Numerical analysis of heat transfer in the annular flow regime}
author = {Nozu, S, and Honda, H}
abstractNote = {A method is presented for estimating the condensation heat transfer coefficient in a horizontal, spirally grooved microfin tube. Based on the flow observation study performed by the authors, a laminar film condensation model in the annular flow regime is proposed. The model assumes that all the condensate flow occurs through the grooves. The condensate film is segmented into thin and thick film regions. In the thin film region formed on the fin surface, the condensate is assumed to be drained by the combined surface tension and vapor shear forces. In the thick film region formed in the groove, on the other hand, the condensate is assumed to be driven by the vapor shear force. The present and previous local heat transfer data including four fluids (CFC11, HCFC22, HCFC123, and HFCl34a) and three microfin tubes are found to agree with the present predictions to a mean absolute deviation of 15.1%.}
doi = {10.1115/1.521439}
journal = {Journal of Heat Transfer}
issue = {1}
volume = {122}
journal type = {AC}
place = {United States}
year = {2000}
month = {Feb}
}