TY - JOUR
T1 - Experimental Study on R245fa Condensation Heat Transfer in Horizontal Smooth Tube and Enhanced Tube
AU - Liu, Shengchun
AU - Song, Ming
AU - Dai, Baomin
AU - Tian, Yuan
AU - Song, Mengjie
AU - Mao, Ning
N1 - Publisher Copyright:
© 2017 The Author(s).
PY - 2017
Y1 - 2017
N2 - Considerable attention has recently been given to R245fa for applications such as high temperature heat pump. In this paper, the condensation heat transfer characteristics of R245fa in a smooth tube and an internally enhanced tube are experimentally studied. The ranges of condensation temperature, mass flux and cooling water flux are 30~45°C, 84~197kg/m2·s and 732~1228kg/m2·s, respectively. The two tubes with a 4.58 mm inner diameter, 5mm outer diameter and 2000 mm length are used. The heat transfer coefficient in each case was analyzed carefully. The case study results show that condensation heat transfer coefficients increase with the increase of mass flux, but decrease with the condensation temperature. And the influence of cooling water flux on heat transfer coefficient is small. Compared the heat transfer coefficient between the smooth tube and the internally enhanced tube, Enhanced rates is 1.8 to 2.5.
AB - Considerable attention has recently been given to R245fa for applications such as high temperature heat pump. In this paper, the condensation heat transfer characteristics of R245fa in a smooth tube and an internally enhanced tube are experimentally studied. The ranges of condensation temperature, mass flux and cooling water flux are 30~45°C, 84~197kg/m2·s and 732~1228kg/m2·s, respectively. The two tubes with a 4.58 mm inner diameter, 5mm outer diameter and 2000 mm length are used. The heat transfer coefficient in each case was analyzed carefully. The case study results show that condensation heat transfer coefficients increase with the increase of mass flux, but decrease with the condensation temperature. And the influence of cooling water flux on heat transfer coefficient is small. Compared the heat transfer coefficient between the smooth tube and the internally enhanced tube, Enhanced rates is 1.8 to 2.5.
KW - condensation heat transfer characteristics
KW - enhanced tube
KW - heat transfer coefficient
KW - smooth tube
UR - http://www.scopus.com/inward/record.url?scp=85041540259&partnerID=8YFLogxK
U2 - 10.1016/j.egypro.2017.12.342
DO - 10.1016/j.egypro.2017.12.342
M3 - Conference article
AN - SCOPUS:85041540259
SN - 1876-6102
VL - 142
SP - 4169
EP - 4175
JO - Energy Procedia
JF - Energy Procedia
T2 - 9th International Conference on Applied Energy, ICAE 2017
Y2 - 21 August 2017 through 24 August 2017
ER -