AN UPDATED MODEL FOR CONDENSATION OF HALOGENATED REFRIGERANTS INSIDE ENHANCED TUBES
The present authors aim to present a new simple model for the prediction of the heat transfer coefficient to be applied to condensation in microfin tubes of halogenated and natural refrigerants, pure fluids or nearly azeotropic mixtures. The updated model accounts for refrigerant physical properties, two-phase flow patterns in microfin tubes and geometrical characteristics of the tubes. It is validated against a data bank of 3115 experimental heat transfer coefficients measured in different independent laboratories all over the world including diverse inside tube geometries and different condensing refrigerants among which R22, R134a, R123, R407C, R410A and CO2. The comparisons show a good agreement with experimental data: average deviation: eR =3.23 ％, absolute mean deviation eAB = 16.44 ％ and standard deviation σN =21.93 ％ for the total number of 3115 data points.
A.Cavallini D.Del Col S.Mancin L.Rossetto
Dipartimento di Fisica Tecnica, University of Padova, Via Venezia 1,Padova, 35131, Italy
国际会议
The 22nd International Congress of Refrigeration(第22届国际制冷大会)
北京
英文
2007-08-21（万方平台首次上网日期，不代表论文的发表时间）