Abstract:

A bypass optimal design method was presented, which could decrease the total utility of the heat exchanger networks (HEN), increase the degree of freedom for the HEN control and reduce the overall operating cost obviously.The operating cost was considered as the objective function, and at the same time the effect of the fouling of heat exchangers was included, and then the location and degree of openness of the bypass could be determined by several times of optimal calculations.The minimum bypass degree of openness was selected and the number of bypasses was decided depending on the specific practical state.At last the HEN bypass optimal design was realized.A case study demonstrated the effectiveness and prospect of application of the method proposed in this paper.