A Generalized, Nonsmooth Operator for Process Integration

Abstract This work presents a novel, generalized method for solving resource targeting problems for process integration. The approach uses nonsmooth systems of two equations per resource to simulate the process under optimal resource reuse. The resulting equation system, including process models, is solved using new advances in the automatic generation of LD-derivatives to supply generalized derivative elements to nonsmooth equation-solving methods. Therefore, this method can be used to solve for process variables in addition to resource targets and retains the same number of equations regardless of the number of resource sources and sinks in the problem. An illustrative example of combined mass and water integration is included to demonstrate the strengths and flexibility of this approach.

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