Proceedings of Symposium on Energy Engineering in the 21st Century (SEE2000) Volume I-IV

ISBN Print: 1-56700-132-7

EXPERIMENT OF BOILING HEAT TRANSFER IN A NEW TYPE OF HORIZONTAL THREE DIMENSIONAL MICROFIN TUBE FOR R134A

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DOI: 10.1615/SEE2000.430
pages 379-383

Jie Zhou Institute of Engineering Thermophysics Chongqing University, Chongqing 400044, China

Qinghua Chen Institute of Engineering Thermophysics Chongqing University, Chongqing 400044, China

Mingdao Xin Institute of Engineering Thermophysics, Chongqing University, Chongqing 400044, P. R. China

Gang Zhang Institute of Engineering Thermophysics Chongqing University, Chongqing 400044, China

Wenzhi Cui Institute of Engineering Thermophysics Chongqing University, Chongqing 400044, China

Abstract

In-tube boiling experiment for R134a is performed in a new type of horizontal three-dimensional (3-D) microfin tube. The effects of mass flux, vapor quality, heat flux and boiling pressure on the heat transfer coefficient are reported. Compared with the data of the smooth tube, the average enhancement ratio is between 2.1 to 2.7. The heat transfer coefficients are higher 30% ∼ 40% than the data in the paper [3]. Based on the experimental data, an empirical correlation is obtained and the maximum deviation is within ±25%.

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