Research On Saving Energy And Applicability In Surface Water Source Heat Pump System

With economic and technological development as well as energy and environmental issues have become increasingly prominent, the surface water source heat pump air conditioning system will be paid more and more attention. In China the Yangtze River basin and southern regions rivers, lakes, reservoirs and other surface water resources are very rich in the application of surface water source heat pump,so it provides a superior natural conditions, however, there are still some problems in the surface water source heat pump design and applications, especially the transmission and distribution system energy is too large, which makes water source heat pump system is not energy-saving, this study aims to address energy consumption of water source heat pump system,give the principles and methods to lower the energy consumption and improve energy efficiency of system.This article describes the composition of water source heat pump system, and analysis the influencing factors of the various components; According to a comprehensive energy-saving water source heat pump experimental platform to establish model of heat pump and cooling water pump energy consumption, chilled water pump model, Under different operating conditions, Using the test platform to test the unit energy efficiency, cooling water pumps, chilled water pump energy consumption, Compared with the model value from the value of the error small, the model is correct.Based on the established model, under four different operating modes ,study variation of unit and system energy efficiency. Obtain that various factors affect the situation of units and systems energy efficiency. And to the best overall system energy efficiency as the goal, has been a case study in energy-saving heat pump unit and pumps operating mode.Compared with conventional air conditioning systems (including cooling towers) , From the water temperature, water height difference, annual cost of three aspects, analysis applicability of water source heat pump system in the project. According to energy consumption model ,to be taken for water temperature and water height difference and the relationship between energy efficiency, combined with the energy efficiency of the system limit value(Conventional air conditioning system EER), and proposed surface water source heat pump water temperature and water height difference of critical analysis of the concept and calculation method. Taking into account air conditioning costs by the composition of the initial investment and operating costs, this article use annual cost method to compare the two air conditioning systems, water source heat pump systems draw smaller annual fee.This paper analyzes cooling water pump power consumption and heat pump performance is affected bythe import and export temperature difference of the cooling water;combined with water source heat pump engineering example-Fu Ling CBD Project,Obtained the best temperature difference of cooling water when total energy consumption reached the minimum, Under the same operating mode, relative energy saving rate of the best operation mode is worked out related to the traditional operation mode (temperature difference is 5℃). This thesis proposed surface water source heat pump energy consumption of raw water system analysis method, energy saving measures and applicable conditions for the surface water source heat pump system design and energy-saving operation to provide important theoretical basis.