TY - JOUR
T1 - Local heat transfer measurements of plate finned-tube heat exchangers by infrared thermography
AU - Ay, Herchang
AU - Jang, Jiin Yuh
AU - Yeh, Jer Nan
N1 - Funding Information:
This research is supported by the National Science Council of Taiwan under contract NSC 89-2212-E-006-131 and NSC 88-2511-S-218-002. The authors are indebted to Mr. C.-F. Liang, K.-B. Sun, H.-C. Wang and C.-H. Chou for the experimental setup participated through their related work.
PY - 2002/9/1
Y1 - 2002/9/1
N2 - An experimental study is performed using an infrared thermovision to monitor temperature distribution over a plate-fin surface inside the plate finned-tube heat exchangers. The differentiation of the temperature function is derived to determine the local convective heat transfer coefficients on the tested fin, using a local element lumped conduction equation included the convective effect on the boundaries with experimental data. It is disclosed that the infrared thermography is capable of rapidly detecting location and extent of transition and separation regions of the boundary layer over the whole surface of the tested models. Through the comparison of the test results on the strategy region of the in-line and staggered arrangements, it is more easy to understand or interpret the detailed dynamic phenomena of flow existed in the heat exchangers. In addition, the experimental results demonstrate that the averaged heat transfer coefficient of staggered configuration is 14 32% higher than that of in-lined configuration
AB - An experimental study is performed using an infrared thermovision to monitor temperature distribution over a plate-fin surface inside the plate finned-tube heat exchangers. The differentiation of the temperature function is derived to determine the local convective heat transfer coefficients on the tested fin, using a local element lumped conduction equation included the convective effect on the boundaries with experimental data. It is disclosed that the infrared thermography is capable of rapidly detecting location and extent of transition and separation regions of the boundary layer over the whole surface of the tested models. Through the comparison of the test results on the strategy region of the in-line and staggered arrangements, it is more easy to understand or interpret the detailed dynamic phenomena of flow existed in the heat exchangers. In addition, the experimental results demonstrate that the averaged heat transfer coefficient of staggered configuration is 14 32% higher than that of in-lined configuration
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U2 - 10.1016/S0017-9310(02)00132-1
DO - 10.1016/S0017-9310(02)00132-1
M3 - Article
AN - SCOPUS:0036708044
SN - 0017-9310
VL - 45
SP - 4069
EP - 4078
JO - International Journal of Heat and Mass Transfer
JF - International Journal of Heat and Mass Transfer
IS - 20
ER -