Abstract
An experimental investigation of evaporating heat transfer in 9.52 mm O.D. horizontal copper tubes was conducted. The refrigerants tested were R22 and the near-azeotropic mixture, R410A. The test rig had a straight, horizontal test section with an active length of 0.92 m and was heated by the heat transfer fluid (hot water) circulated in a surrounding annulus. Constant heat flux of 11.0 kW/m{sup 2} was maintained and refrigerant quality varied from 0.2 to 0.8.. The results were reported for evaporation at 15 {sup o}C in a 0.92 m long test section for 30-60 kg/h mass flow rate. The local and average heat transfer coefficients for seven microfin tubes were presented compared to those for a smooth tube. The average evaporation heat transfer coefficients of R22 and R410A for the microfin tubes were 1.86-3.27 and 1.64-2.99 times higher than those for the smooth tube, respectively. When compared to R22 at the same test conditions, the evaporating heat transfer coefficients for R410A were 97-129% of R22. (author)
Kim, Man-Hoe;
Shin, Joeng-Seob
[1]
- Korea Advanced Institute of Science and Technology, Daejeon (Korea). Department of Mechanical Engineering
Citation Formats
Kim, Man-Hoe, and Shin, Joeng-Seob.
Evaporating heat transfer of R22 and R410A in horizontal smooth and microfin tubes.
United Kingdom: N. p.,
2005.
Web.
doi:10.1016/j.ijrefrig.2005.01.016.
Kim, Man-Hoe, & Shin, Joeng-Seob.
Evaporating heat transfer of R22 and R410A in horizontal smooth and microfin tubes.
United Kingdom.
https://doi.org/10.1016/j.ijrefrig.2005.01.016
Kim, Man-Hoe, and Shin, Joeng-Seob.
2005.
"Evaporating heat transfer of R22 and R410A in horizontal smooth and microfin tubes."
United Kingdom.
https://doi.org/10.1016/j.ijrefrig.2005.01.016.
@misc{etde_20647108,
title = {Evaporating heat transfer of R22 and R410A in horizontal smooth and microfin tubes}
author = {Kim, Man-Hoe, and Shin, Joeng-Seob}
abstractNote = {An experimental investigation of evaporating heat transfer in 9.52 mm O.D. horizontal copper tubes was conducted. The refrigerants tested were R22 and the near-azeotropic mixture, R410A. The test rig had a straight, horizontal test section with an active length of 0.92 m and was heated by the heat transfer fluid (hot water) circulated in a surrounding annulus. Constant heat flux of 11.0 kW/m{sup 2} was maintained and refrigerant quality varied from 0.2 to 0.8.. The results were reported for evaporation at 15 {sup o}C in a 0.92 m long test section for 30-60 kg/h mass flow rate. The local and average heat transfer coefficients for seven microfin tubes were presented compared to those for a smooth tube. The average evaporation heat transfer coefficients of R22 and R410A for the microfin tubes were 1.86-3.27 and 1.64-2.99 times higher than those for the smooth tube, respectively. When compared to R22 at the same test conditions, the evaporating heat transfer coefficients for R410A were 97-129% of R22. (author)}
doi = {10.1016/j.ijrefrig.2005.01.016}
journal = []
issue = {6}
volume = {28}
place = {United Kingdom}
year = {2005}
month = {Sep}
}
title = {Evaporating heat transfer of R22 and R410A in horizontal smooth and microfin tubes}
author = {Kim, Man-Hoe, and Shin, Joeng-Seob}
abstractNote = {An experimental investigation of evaporating heat transfer in 9.52 mm O.D. horizontal copper tubes was conducted. The refrigerants tested were R22 and the near-azeotropic mixture, R410A. The test rig had a straight, horizontal test section with an active length of 0.92 m and was heated by the heat transfer fluid (hot water) circulated in a surrounding annulus. Constant heat flux of 11.0 kW/m{sup 2} was maintained and refrigerant quality varied from 0.2 to 0.8.. The results were reported for evaporation at 15 {sup o}C in a 0.92 m long test section for 30-60 kg/h mass flow rate. The local and average heat transfer coefficients for seven microfin tubes were presented compared to those for a smooth tube. The average evaporation heat transfer coefficients of R22 and R410A for the microfin tubes were 1.86-3.27 and 1.64-2.99 times higher than those for the smooth tube, respectively. When compared to R22 at the same test conditions, the evaporating heat transfer coefficients for R410A were 97-129% of R22. (author)}
doi = {10.1016/j.ijrefrig.2005.01.016}
journal = []
issue = {6}
volume = {28}
place = {United Kingdom}
year = {2005}
month = {Sep}
}