Design And Analysis Of Sewage-source Heat Pump System

With the development of economy, resource demand has increased dramatically, environment pollution becomes more and more serious, the serious influence on people's life and economic sustainable development. In order to solve the problem, we put forward a series of measures for energy conservation and emission reduction in national development and utilization of water resources, is one of the important measures.Water is a kind of ideal low heat, and have very development space. Our sewage-source heat pump system design process also exists nonstandard phenomenon. The paper analyzes many scholars research and practice experience, summarizes some key problems in the design process and the key points of design standards of sewage-source heat pump system. Shell and tube heat exchanger, screw compressor, and electronic expansion valves are detailed selectioned and designed, and a sewage-source heat pump system is designed for a building of Harbin.Computer simulation of heat pump system has become an important means of study, subject to Visual Basic and MATLAB software to simulate the platform, establish evaporator and condenser respectively the distribution parameters of the model, and the compressor and the mathematical model of the expansion valve, then, according to the sequence of using modules of conservation of mass, momentum and energy conservation, constructing the sewage-source heat pump system model.Using the simulation program of sewage-source heat pump system performance, makes a detailed analysis. Separately studied fouling resistances, wastewater and sewage inlet temperature changes in temperature, the evaporation temperature and condensing water condenser, evaporator export quantity of heat, power consumption, energy efficiency compressor. Thus the determination of reasonable removal cycle, regular decontamination, so the system more energy.The efficiency of sewage-source heat pump system directly related to its application. Compare with other several common systems, sewage-source heat pump system reflects its economy more intuitively from the initial investment and operation cost two aspects.