Integrated application of ground-source heat pump system with multistage heat recovery from extract air in projects

According to the climate characteristics in southern China, proposes the integrated system for a project. Presents its energy saving principle of the system, and calculates the energy saving property of the system based on the analysis of annual dynamic air conditioning load characteristics. The results show that the yearly average coefficient of performance (COP) is 5.30, the investment payback period is 5.5 years, and the load unbalance rate is greatly reduced. The system is better in energy and economical efficiencies and a broad application prospect.