Influence of ambient temperatures on performance of a CO2 heat pump water heating system

被引：59

作者：

Yokoyama, Ryohei

Shimizu, Takeshi

Ito, Koichi

Takemura, Kazuhisa

机构：

[1] Osaka Prefecture Univ, Dept Mech Engn, Naka Ku, Sakai, Osaka 5998531, Japan

[2] Waseda Univ, Adv Res Inst Sci & Engn, Shinjuku Ku, Tokyo 1698555, Japan

[3] Kansai Elect Power Co Inc, Dept Res & Dev, Amagasaki, Hyogo 6610974, Japan

来源：

ENERGY | 2007年 / 32卷 / 04期

关键词：

heat pump; refrigerant; CO2; thermal storage; system performance; thermodynamics; cycle analysis; numerical simulation;

D O I：

10.1016/j.energy.2006.06.020

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In residential applications, an air-to-water CO, heat pump is used in combination with a domestic hot water storage tank, and the performance of this system is affected significantly not only by instantaneous ambient air and city water temperatures but also by hourly changes of domestic hot water consumption and temperature distribution in the storage tank. In this paper, the performance of a CO2 heat pump water heating system is analyzed by numerical simulation. A simulation model is created based on thermodynamic equations, and the values of model parameters are estimated based on measured data for existing devices. The calculated performance is compared with the measured one, and the simulation model is validated. The system performance is clarified in consideration of seasonal changes of ambient air and city water temperatures. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：388 / 398

页数：11

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