Heat exchanger network synthesis for batch processes involving heat storages

Having time-dependent streams makes the heat exchanger network(HEN) synthesis of batch process much more complicated than its continuous partner. In this paper, heat storages are employed to overcome the time-dependent limit and heat storages and heat exchangers are combined for sake of equipment cost reduction. To obtain the optimal solution, a nonlinear programming(NLP) with the objective of minimize total annual cost is established for the overall HEN synthesis, including the optimization of heat storage temperatures. At last an example is used to show the application and effectiveness of the proposed methods. © All Rights Reserved.