Research on on-off valve control of fan-coil unit thermal coupling with room

In order to realize the thermal coupling simulation calculation between the air conditioning terminal with on-off control and the building in the thermal simulation software DeST, based on the basic room temperature in the DeST software kernel, this paper establishes a thermal coupling simulation model of the cooling and heating capacity of the air conditioning terminal with on-off control and the indoor temperature under the condition of a small time step. The simulation results of the model are compared with the experimental results, and it is proved that the model can accurately simulate the indoor temperature change under the controlled fan-coil unit cooling. The model is used to simulate a building and compared with the uncoupled model. The results show that the model can more truly reflect the on-off situation of the controlled air conditioning terminal and the real-time change of the indoor temperature.