Study On Heating Restruction Of Absorption Heat Pump In Dalian Power Plant Of China Huaneng Group

Research shows that when the heating distributing network water temperature is higher than 50℃and low-temperature heat source temperature is lower than 30℃,the absorption heat pump has a high economy. However, a few scholars analysis quantitatively optimal range of absorption heat pump .The study of the paper makes up for the deficiency.In the discussion, Dalian Power Plant of China Huaneng Group has 4 sets of 350MW generator. Heating distributing network water heating temperature of the plant is 70℃.The lowest temperature of heat source is 19.5℃. Exhaust of the turbine gets into pressure and temperature reducer and then enters heater for heating network. The system losses a lot of heat in the pressure and temperature reducer.Firstly, the paper analyzes data about Dalian Power Plant. Analysis shows the heating distributing network water temperature is high and low-temperature heat source temperature is low. The paper researchs the optimal range of the absorption heat pump.The research shows the optimal range of heating distributing network water temperature is 62.5℃to 75℃and the optimal range of low-temperature heat is 12.5℃to 29.5℃.In this context, the absorption heat pump is better than the compression heat pump. At the same time, the paper puts forward turbine-pump heating and compare it with absorption heat pump.The conclusion shows that absorption heat pump heating is better than turbine-pump heating; Secondly, according to the data about Dalian Power Plant, lithium bromide absorption heat pump heating system is described mathematically and thermal calculation program is completed by utilizing Matlab software. Thermodynamic calculation, heat transfer calculations and structural calculations are completed. Thirdly, .the discussion researchs the performance of system influenced by lowing heating network water supply temperature,the absorption temperature, the outlet temperature of circulating water and steam pressure. At the same time, the concept of dynamic economic cost is brought forward and is regarded as a optimization objective function. Optimization results show that when heating distributing network water temperature is 62.5℃and low temperature heat source temperature is 29.5℃, the economy of absorption heat pump is the highest; Finally, based on time value of money, sensitivity of NPVR is analyzed. The discussion analyzes economy of the absorption heat pump heating system, compression heat pump heating system, turbine-pump heating system and the original system and calculates their annual cost, dynamic investment recovery period and NPV.When the heating distributing network water temperature is 62.5℃to 75℃and low temperature heat source water temperature is 12.5℃to 29.5℃, it is feasible to popularize the research conclusion of Dalian Power Plant of China Huaneng Group.This research of the paper provides technical support for economic analysis, performance analysis, optimization of absorption heat pump heating.