Abstract
The paper analyses merits and demerits of cooling and heating source schemes in hot-summer and cold-winter regions. Moreover, it investigates the working principles, category and utilization of closed heat source heat pump air conditioning system. Additionally, it introduces the developmental history and research reviews in this field. In this paper, a practical application of this system was tested and the operational characteristics were analyzed. It has been proposed that closed heat source heat pump has wide prospects with features of energy conservation, environmental protection and sustainable development in hot-summer and cold-winter regions.
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