Under the background of the"Dual-Carbon Goals"(realizing carbon peak before 2030 and carbon neutrality before 2060)in China,the improvement of building energy efficiency has reached an unprecedented height.Based on the actual operation monitoring data of the air-conditioning system of a stadium in Shanghai,the operation of the air-conditioning system is analyzed,evaluated and diagnosed,and the operation of the air-conditioning system is optimized.The results show that the energy consumption of the air-cooled heat pump unit accounts for 90%and the water pump accounts for 10%during the operation of the air conditioning system.The average COP of the air-cooled heat pump unit was3.01,and the average transfer coefficient of the pump is 23.9.The average temperature difference between the inlet and outlet water of the heat pump unit is 3.2℃,and the average temperature difference of the system is only 1.5℃,which is much lower than the design temperature difference.The circulating water volume of the system is much greater than the actual demand,and the energy consumption of the pump can be reduced by 64%through the optimal control of the pump.The load distribution and number control optimization of the air-cooled heat pump unit can reduce the energy consumption by 6.7%,and the load distribution optimization and the optimal control of the number of units of the inverter centrifugal unit can reduce the energy consumption by 8.9%.Compared with the air-cooled heat pump unit,the priority operation of the water-cooled variable frequency centrifugal chiller can reduce the energy consumption of the air conditioning system by 36.9%.
air conditioning systemheat and cold sourceevaluationoperation optimizationenergy saving
NETL
NSTL
万方数据
