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Indexed by:会议论文

Date of Publication:2015-01-01

Included Journals:CPCI-S

Volume:37

Page Number:1139-1144

Key Words:indirect work exchanger network; transshipment model; process synthesis; compression/expansion ratio

Abstract:The synthesis of indirect work exchanger network (WEN) based on transshipment model is first studied considering the compression ratio and expansion ratio as the variables in this paper. Compared with superstructure method, the transshipment model is simpler to obtain the minimum utility consumption taken as the objective function, which is also easier to get the optimal WEN configuration in which the number of units is minimized. The proposed approach for WEN synthesis is a linear program model applied to isothermal process. All the streams are divided into several pressure intervals, also called sub-networks. Then the energy balance is calculated in each sub-network according to the analysis of work cascade in isothermal process. In addition, the adjacent intervals are merged according to the proposed merging rules in order to decrease utility consumption and optimize the network structure. Finally, this method is proved to be feasible and effective by an example.