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Condensation of refrigerants in horizontal microfin tubes. Numerical analysis of heat transfer for annular flow regime; Reibai no microfin tsuki suihei kannai gyoshuku. Kanjoryu ryoiki ni okeru netsudentatsu no suchi kaiseki

Journal Article:

Abstract

A method for predicting the local heat transfer coefficient is presented for film condensation of vapor in a spirally grooved horizontal microfin-tube. Based on the flow observation study performed by the present authors, film flow model between fins in the annular flow regime is proposed. For the fin surface, laminar condensate film controlled by the combined effects of vapor shear and surface tension forces is analyzed. While, in the groove, thick condensate film driven by the vapor shear force is taken into consideration. A parameter which accounts for the transition from annular- to stratified flow regimes is also derived. The present and previous local heat transfer data for fluorocarbon refrigerants in the annular flow regime are found by the present numerical analysis to have a mean absolute deviation of 15.1 percent. 12 refs., 10 figs., 2 tabs.
Authors:
Nozu, S; [1]  Honda, H [2] 
  1. Okayama Prefectural University, Okayama (Japan)
  2. Kyushu University, Fukuoka (Japan). Institute of Advanced Material Study
Publication Date:
Jul 25, 1998
Product Type:
Journal Article
Reference Number:
SCA: 420400; 320303; PA: JP-98:0G4390; EDB-99:002968; SN: 98002036597
Resource Relation:
Journal Name: Nippon Kikai Gakkai Ronbunshu. B Hen (Transactions of the Japan Society of Mechanical Engineers. Part B); Journal Volume: 64; Journal Issue: 623; Other Information: PBD: 25 Jul 1998
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; REFRIGERANTS; CARBON FLUORIDES; VAPOR CONDENSERS; TUBES; FINS; FILM CONDENSATION; HEAT TRANSFER; FLUID FLOW; ANNULAR SPACE; NUMERICAL ANALYSIS; VAPORS; SHEAR; SURFACE TENSION; ERRORS
OSTI ID:
677316
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Journal ID: NKGBDD; ISSN 0387-5016; TRN: JN98G4390
Submitting Site:
NEDO
Size:
pp. 300-307
Announcement Date:
Dec 31, 1998

Journal Article:

Citation Formats

Nozu, S, and Honda, H. Condensation of refrigerants in horizontal microfin tubes. Numerical analysis of heat transfer for annular flow regime; Reibai no microfin tsuki suihei kannai gyoshuku. Kanjoryu ryoiki ni okeru netsudentatsu no suchi kaiseki. Japan: N. p., 1998. Web.
Nozu, S, & Honda, H. Condensation of refrigerants in horizontal microfin tubes. Numerical analysis of heat transfer for annular flow regime; Reibai no microfin tsuki suihei kannai gyoshuku. Kanjoryu ryoiki ni okeru netsudentatsu no suchi kaiseki. Japan.
Nozu, S, and Honda, H. 1998. "Condensation of refrigerants in horizontal microfin tubes. Numerical analysis of heat transfer for annular flow regime; Reibai no microfin tsuki suihei kannai gyoshuku. Kanjoryu ryoiki ni okeru netsudentatsu no suchi kaiseki." Japan.
@misc{etde_677316,
title = {Condensation of refrigerants in horizontal microfin tubes. Numerical analysis of heat transfer for annular flow regime; Reibai no microfin tsuki suihei kannai gyoshuku. Kanjoryu ryoiki ni okeru netsudentatsu no suchi kaiseki}
author = {Nozu, S, and Honda, H}
abstractNote = {A method for predicting the local heat transfer coefficient is presented for film condensation of vapor in a spirally grooved horizontal microfin-tube. Based on the flow observation study performed by the present authors, film flow model between fins in the annular flow regime is proposed. For the fin surface, laminar condensate film controlled by the combined effects of vapor shear and surface tension forces is analyzed. While, in the groove, thick condensate film driven by the vapor shear force is taken into consideration. A parameter which accounts for the transition from annular- to stratified flow regimes is also derived. The present and previous local heat transfer data for fluorocarbon refrigerants in the annular flow regime are found by the present numerical analysis to have a mean absolute deviation of 15.1 percent. 12 refs., 10 figs., 2 tabs.}
journal = {Nippon Kikai Gakkai Ronbunshu. B Hen (Transactions of the Japan Society of Mechanical Engineers. Part B)}
issue = {623}
volume = {64}
journal type = {AC}
place = {Japan}
year = {1998}
month = {Jul}
}