Experimental Dynamic Performance Study On ASHP Developed For the Frozen Areas

Great advancements have been made in the ASHPs (air source heat pumps) due to concerns for energy crises and consciousness of sustainable development; however there is still a deadly shortcoming that limits its widespread applications, especially in the frozen areas. However the there are greater need for the ASHPs that can run smoothly in the frigid areas in North China due to the reasons as following:(1) conventional coal-fired heating methods will inevitably lead to severe air pollution beyond toleration in North China;(2) the deadline the government set forth often can’t meet with the real situation, (3) there are great demand for both heating and cooling in many new resident apartment as great achievements have been made in the living standards and there are no coal-fired heating system in these apartments. In this paper the author proposed an improved cycle, an auxiliary cycle is added to the conventional cycle, in this way the heating capacity under low ambient temperature can be greatly improved. The prototype ASHP was validated and ran a whole winter in Beijing, China. The relevant dynamic-performance characteristics were tested and the outcomes show that this new kind of ASHP can work very well under the ambient temperatures as low as -15 °C, In addition, the efficiency of the improved ASHP under all circumstances was addressed and great energy can be saved through the improved system’s increased efficiency. In this way the applications of ASHP were enlarged and a simple and feasible alternative heating service was developed for heating in North China, which can also partly solve the server and server atmosphere pollution problems in these regions.