Energy-saving Optimization Control Technology Of Water Source Heat Pump Heating System

Under the dual pressures of energy supply and demand contradictions and increasingly serious environmental pollution,it is necessary to adopt clean energy instead of traditional fossil energy to reduce conventional energy consumption and realize clean heating in order to build a resource-saving and environment-friendly society in China.In order to achieve the above goals,heat pump technology is attracting people's attention and promotion.In the heat pump classification,the water source heat pump is a high-efficiency energy-saving heat pump system that utilizes groundwater resources and can provide heating in winter and cooling in summer.A large number of literatures have put forward good suggestions for the applicability of water source heat pumps and reasonable pre-design.However,there is a lack of systematic research on the optimal operation and control of existing water source heat pump projects,which is also the significance of this research.In this paper,the water source heat pump system of a residential area in Tangshan is taken as the research object.Through the actual measurement and analysis of the operating characteristics and system energy consumption of the system,the optimal operation strategy of the water source heat pump system is proposed.The paper first discusses the development status of domestic and foreign groundwater source heat pumps,and analyzes the advantages of water source heat pumps and the problems that are easy to occur in the application process.Then,according to the actual test data of the community,the unit's heating capacity,power consumption,energy consumption of the transmission and distribution system,and the performance coefficient of the system are calculated.The results show that the energy consumption of the transmission and distribution system accounts for 31% of the total energy consumption.There is a large flow mode in its operation process.In order to further save energy consumption,this paper establishes the dynamic model of the system based on TRNSYS simulation software platform.The analysis model error is less than 5%,which verifies the correctness of the model.Aiming at the operational problems in the test system,an optimization control strategy is proposed to increase the temperature difference between the supply and return water and adopt the frequency conversion measures for the transmission and distribution system.Finally,according to the simulation results,the energy consumption of the system under the optimized control strategy and the advantages of energy saving,environmental protection and economy compared with the traditional coal-fired boiler are analyzed.The results show that compared with the basic operation strategy,under the optimized strategy,the system can save energy.As the temperature difference between supply and return water increases,the COP of the unit will be affected to some extent.The average COP will be reduced by 2.8%.However,the overall system saves 253442 kWh power in one heating season and 15.8% energy consumption compared with the existing system.Compared with conventional coal-fired boilers,the standard coal saving under the optimization strategy is 333.93 tons,which can reduce 824.81 tons of carbon dioxide emissions,6.68 tons of sulfur dioxide emissions,3.34 tons of dust emission reduction,and the static recovery period of the system is 3.39 years.The above research provides a basic support for the optimal regulation of the operation process of water source heat pump system.