Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1736053 | Energy | 2007 | 11 Pages |
Abstract
In residential applications, an air-to-water CO2 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.
Keywords
Related Topics
Physical Sciences and Engineering
Energy
Energy (General)
Authors
Ryohei Yokoyama, Takeshi Shimizu, Koichi Ito, Kazuhisa Takemura,