Abstract: A discrete theoretical model of the internal flow in the Multi-radiation air conditioning system is established, and the control equation of the model is solved by bidirectional iterative algorithm. The uniformity of the static pressure distribution and flow distribution of the refrigerant in the system under different Re numbers is studied. The results show that under the same Re number, the distribution of refrigerant in the branch pipe presents an incremental bias distribution along the flow direction, and the increase of Re number intensifies the bias distribution of refrigerant. In order to overcome the heating inhomogeneity caused by the bias distribution of refrigerant, puts forward two solutions to improve the uniformity of refrigerant distribution from the aspects of structure design and control logic.

Key words: Multi-radiation air conditioner, Discrete theoretical model, Bidirectional iterative algorithm, Refrigerant distribution