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Flow condensation heat transfer coefficients of R22, R134a, R407C, and R410A inside plain and microfin tubes

Abstract

Flow condensation heat transfer coefficients (HTCs) of R22, R134a, R407C, and R410A inside horizontal plain and microfin tubes of 9.52 mm outside diameter and 1 m length were measured at the condensation temperature of 40{sup o}C with mass fluxes of 100, 200, and 300 kg m{sup -2} s{sup -1} and a heat flux of 7.7-7.9 kW m{sup -2}. For a plain tube, HTCs of R134a and R410A were similar to those of R22 while HTCs of R407C are 11-15% lower than those of R22. For a microfin tube, HTCs of R134a were similar to those of R22 while HTCs of R407C and R410A were 23-53% and 10-21% lower than those of R22. For a plain tube, our correlation agreed well with the present data for all refrigerants exhibiting a mean deviation of 11.6%. Finally, HTCs of a microfin tube were 2-3 times higher than those of a plain tube and the heat transfer enhancement factor decreased as the mass flux increased for all refrigerants tested. (Author)
Authors:
Jung, Dongsoo; Cho, Youngmok; Park, Kiho [1] 
  1. Inha Univ., Incheon (Korea). Dept. of Mechanical Engineering
Publication Date:
Jan 01, 2004
Product Type:
Journal Article
Resource Relation:
Journal Name: International Journal of Refrigeration; Journal Volume: 27; Journal Issue: 1; Other Information: PBD: Jan 2004
Subject:
42 ENGINEERING; FLUID FLOW; VAPOR CONDENSATION; HEAT TRANSFER; REFRIGERANTS; TUBES; FINS
OSTI ID:
20414042
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0140-7007; IJRFDI; TRN: GB0320673
Submitting Site:
GB
Size:
page(s) 25-32
Announcement Date:

Citation Formats

Jung, Dongsoo, Cho, Youngmok, and Park, Kiho. Flow condensation heat transfer coefficients of R22, R134a, R407C, and R410A inside plain and microfin tubes. United Kingdom: N. p., 2004. Web. doi:10.1016/S0140-7007(03)00122-1.
Jung, Dongsoo, Cho, Youngmok, & Park, Kiho. Flow condensation heat transfer coefficients of R22, R134a, R407C, and R410A inside plain and microfin tubes. United Kingdom. doi:10.1016/S0140-7007(03)00122-1.
Jung, Dongsoo, Cho, Youngmok, and Park, Kiho. 2004. "Flow condensation heat transfer coefficients of R22, R134a, R407C, and R410A inside plain and microfin tubes." United Kingdom. doi:10.1016/S0140-7007(03)00122-1. https://www.osti.gov/servlets/purl/10.1016/S0140-7007(03)00122-1.
@misc{etde_20414042,
title = {Flow condensation heat transfer coefficients of R22, R134a, R407C, and R410A inside plain and microfin tubes}
author = {Jung, Dongsoo, Cho, Youngmok, and Park, Kiho}
abstractNote = {Flow condensation heat transfer coefficients (HTCs) of R22, R134a, R407C, and R410A inside horizontal plain and microfin tubes of 9.52 mm outside diameter and 1 m length were measured at the condensation temperature of 40{sup o}C with mass fluxes of 100, 200, and 300 kg m{sup -2} s{sup -1} and a heat flux of 7.7-7.9 kW m{sup -2}. For a plain tube, HTCs of R134a and R410A were similar to those of R22 while HTCs of R407C are 11-15% lower than those of R22. For a microfin tube, HTCs of R134a were similar to those of R22 while HTCs of R407C and R410A were 23-53% and 10-21% lower than those of R22. For a plain tube, our correlation agreed well with the present data for all refrigerants exhibiting a mean deviation of 11.6%. Finally, HTCs of a microfin tube were 2-3 times higher than those of a plain tube and the heat transfer enhancement factor decreased as the mass flux increased for all refrigerants tested. (Author)}
doi = {10.1016/S0140-7007(03)00122-1}
journal = {International Journal of Refrigeration}
issue = {1}
volume = {27}
journal type = {AC}
place = {United Kingdom}
year = {2004}
month = {Jan}
}