Carbon dioxide as refrigerant for tap water heat pumps: A comparison with the traditional solution

被引：113

作者：

Cecchinato, L ^{[1
]}

Corradi, M ^{[1
]}

Fornasieri, E ^{[1
]}

Zamboni, L ^{[1
]}

机构：

[1] Univ Padua, Dipartimento Fis Tecn, I-35131 Padua, Italy

来源：

INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID | 2005年 / 28卷 / 08期

关键词：

heat pump; water-water; heating; hot water; CO2; transcritical cycle; modelling; simulation; optimization; comparison; R-134a;

D O I：

10.1016/j.ijrefrig.2005.05.019

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Increased concern about the environmental impact of the refrigeration technology is leading toward design solutions aimed at improving the energy efficiency of the related applications, using eco-friendly refrigerants, i.e. ozone-friendly and with the least possible global warming potential (GWP). In this respect, carbon dioxide (ASHRAE R744) is seen today as one of the most promising refrigerants and is raising great interest in industrial and scientific fields. In the present work, the plant options are investigated, which are related to the design of air/water heat pumps for tap water using CO2. A comparison is made, in terms of energy efficiency, between a system working with CO2 and a similar one working with HFC R134a; such a comparison is carried out by means of a simulation model of a refrigerating machine/heat pump, characterized by a detailed representation of the heat exchangers, based on their subdivision into elementary volumes. Results show that carbon dioxide is an interesting substitute for synthetic fluids, if the design of the system is focused to take advantage of its properties. (C) 2005 Elsevier Ltd and IIR. All rights reserved.

引用

页码：1250 / 1258

页数：9

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