Flow-boiling of R22, R134a, R507, R404A and R410A inside a smooth horizontal tube

被引：66
|
作者：
Greco, A
Vanoli, GP
机构：
[1] Univ Naples Federico II, DETEC, Fac Ingn, I-80125 Naples, Italy
[2] Univ Sannio, Fac Ingn, Benevento, Italy
来源：
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID | 2005年 / 28卷 / 06期
关键词：
experiment; boiling horizontal tube; R22; R134a; R507; R404A; R410A; heat transfer coefficient;
D O I：
10.1016/j.ijrefrig.2005.01.008
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Flow boiling heat transfer coefficients of R22, R134a, R507, R404A and R410A inside a smooth horizontal tube (6 rum I.D., 6 in length) were measured at a refrigerant mass flux of about 360 kg/m(2) s varying the evaporating pressure within the range 3-12 bar, with heat fluxes within the range 11-21 kW/m(2). The experimental data are discussed in terms of the heat transfer coefficients as a function of the vapour quality. The experimental results clearly show that the heat transfer coefficients of R134a are always higher than those pertaining to R22 (from a minimum of + 6 to a maximum of + 45%). (C) 2005 Elsevier Ltd and IIR. All rights reserved.
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收藏
页码：872 / 880
页数：9
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