两级冷凝热泵热水系统的实验研究

Abstract

When an air source heat pump water heater runs at higher water temperature,the power input and the discharge temperature of its compressor are high,leading to problems of security and stability,and the significant decrease of the system efficiency.In our study,a hot water system with a two-stage condensation heat pump and its corresponding control method were proposed.The experimental results show that compared with the conventional heat pump water heaters,the present system can raise the temperature of sup...