Study On Energy Consumption And Energy Saving Of A River Water Source Heat Pump Water Intake System

With the development of urbanization in China,the energy problem in China is becoming more and more serious.Building energy consumption accounts for about 28% of total energy consumption in China,and energy saving in building energy consumption accounts for about 60% of HVAC energy consumption.In the water source heat pump system,the height difference of water intake often reaches about 30 meters,and the water intake pump consumes a lot of energy consumption,so it also reduces the energy efficiency of the heat pump system.Based on the above background,this paper aims at the water intake system of river water source heat pump system of 1 energy station in Jiangbei City,Chongqing city.The water intake energy consumption of water pump used in agricultural engineering is studied in order to reduce the energy consumption of the whole water intake system and improve the performance coefficient of the water source heat pump system.In this paper,the research status of water supply and distribution system of water source heat pump system and the research status of water pump turbine used in agricultural engineering are analyzed,and the research on the joint use of water source heat pump and water pump turbine is thoroughly and thoroughly understood.In view of the characteristics that the water intake of the water source heat pump system varies with the building load by time,the load of the building group is simulated by the typical building simulation method.The simulation results show that the load frequency of the whole building group is more than 50%-75% time,which accounts for 4 in winter and summer.Around 5%,the air conditioning load above 75% and below 25% appear less time.The energy consumption model of multiple parallel pumps,the efficiency model and the lift model are established,the efficient operation interval of the pump is analyzed.The optimal speed regulation ratio of the variable frequency pump is analyzed and determined in the high efficient operation interval of the pump.The optimization model of the parallel pump is set up,and the optimized water intake control program is compiled with respect to the fixed frequency water intake.Taking the water intake system of the central heating and cooling project in the CBD area of Jiangbei City as an example,the operation of water intake is analyzed.The results show that the annual energy saving rate is 53.6%。In view of the characteristics that the water level of the large drop is rich,the water pump turbine and the variable frequency pump are used to collect Water,and the connection mode of the pump water turbine and the variable frequency pump is determined,that is,the connection mode is connected in series and then in parallel.The optimal control model of potential energy recovery system is established by using the frequency conversion control program of parallel pumps,and the optimization control program is compiled.The operation results show that the energy saving rate of the year is 26.32%.The energy efficiency and economic environmental benefits of Jiangbei City in winter and summer are evaluated and analyzed in the CBD area of Jiangbei City,the energy efficiency and economic environmental benefits are evaluated and analyzed.The energy efficiency of the energy recovery system is analyzed according to the energy saving rate used by the pump turbine and the frequency conversion pump.