Energy-saving diagnosis and analysis are carried out on the operation data of the indirect heating system in a shopping center in Qingdao.Based on the data diagnosis of the incompatible performance of the required heat load and the heating capacity,a mathematical model of the heat balance system and a TRNSYS simulation model are established to optimize the control algorithm by associating water pump frequency conversion to the climate compensation.The stability error between the room temperature and heat consumption of the simulation model TRNSYS and the computational mathematical model is controlled within 1.5%.A dynamic frequency conversion adjustment is proposed to adjust the flow rate of the primary circulating water pump with climate compensation,so as to change the temperature of the water supply on the secondary side and to better adapt to different heat loads of buildings caused by various outdoor temperatures.Results show that the energy consumption reduction within a week is 7.2%,and the optimal control strategy in the heating season reduces the total energy consumption by 16.2%,of which the energy saving during the business period is reduced by 26.0%and the non-business period is reduced by 5.4%.
TRNSYScontrol algorithmindirect connectingclimate compensationenergy efficiency of heating
NETL
NSTL
万方数据
