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

被引：68

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.

引用

页码：872 / 880

页数：9

共 7 条

[1]

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