Composition shift in liquid-recirculation refrigerating systems: an experimental investigation for the pure fluid R134a and the mixture R32/134a

被引：13

作者：

Giuliani, G

Hewitt, NJ

Donati, FM

Polonara, F

机构：

[1] Univ Ancona, Dipartimento Energet, I-60100 Ancona, Italy

[2] Univ Ulster, NICERT, Coleraine BT52 1SA, Londonderry, North Ireland

来源：

INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID | 1999年 / 22卷 / 06期

关键词：

refrigerating plant; R134a; R32; recirculation; chemical composition;

D O I：

10.1016/S0140-7007(99)00009-2

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The ability of zeotropic mixtures with a remarkable temperature glide to operate in liquid-recirculation systems is investigated and the results of an experimental comparison between the performances of the pure fluid R134a and the zeotropic mixture R32/134a (25/75% by mass) are presented. R134a performs slightly better in the liquid-recirculation mode than in the traditional dry-expansion mode; on the other hand, liquid-recirculation configuration has a detrimental effect on the zeotropic mixture's performance. The reason for this detrimental effect is the mixture component separation which occurs at the liquid/vapor separator. The effect of this separation is investigated using gas chromatograph analysis. (C) 1999 Elsevier Science Ltd and IIR. All rights reserved.

引用

页码：486 / 498

页数：13

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