Separation network design with mass and energy separating agents

Abstract

The mathematical model developed in this paper deals with simultaneous synthesis of the integrated separation network, where both mass separating agents (MSAs) and energy separating agents (ESAs) are taken into account. The proposed model formulation is believed to be superior to the available ones. Traditionally, the tasks of optimizing ESA-based and MSA-based processes were either performed individually or studied on a heuristic basis. In this work, both kinds of processes are incorporated into a single comprehensive flowsheet and a novel state-space superstructure with multi-stream mixings is adopted to capture all possible network configurations. By properly addressing the issue of interactions between the MSA and ESA subsystems, lower total annualized cost (TAC) can be obtained by solving the corresponding mixed-integer nonlinear programming (MINLP) model. A benchmark problem already published in the literature has been investigated to demonstrate how better conceptual designs can be generated by our proposed approach.

Synthesis of Interplant Water-Allocation and Heat-Exchange Networks. Part 2: Integrations between Fixed Flow Rate and Fixed Contaminant-Load Processes

“…The appropriate number of these nodes attached on DN and PO block can be determined with the heuristic rules in section 3.2 of our previous work. 1 where f hin e in and f hout e out are the flow rates of hot streams entering to and exiting from unit e; f cin e in and f cout e out stand for the flow rates of cold streams entering to and exiting from unit e; c hin e ,k in and c hout e ,k out denote the concentrations of k in hot streams entering to and exiting from unit e; c cin e ,k in and c cout e ,k out represent the concentrations of k in cold streams entering to and exiting from unit e. In eqs 14−17, we assume that there is no mass loss and therefore all flow rates and concentrations are identical around each unit.…”

Chemical engineering systems modeling and efficiency analysis of heat and mass exchange

“…energy integration into production cycle as energy saving source for system approach. Any chemical engineering system can be matched with a topological representation that stylizes the system under the HEN-MEN [11][12][13][14][15][16].…”

“…The problem formulation leads to the synthesis (structure modification) of the system [11][12][13][14][15][16]. Change of the system structure leads to the heat exchangers networks replenishment.…”

A systematic approach for synthesizing combined mass and heat exchange networks

“…Feng, Li, and Shen (2009) employed a sequential mathematical model. Then, the state-space superstructure (Li, Zhou, Dong, & Grossman, 2011) and the step-based method (Marianne, Luc, Ludovic, Catherine, & Serge, 2012) were implemented for the combined synthesis of water allocation and HEN. In addition, the effect of nonisothermal mixing on water-using network was considered by Liao, Rong, Wang, and Yang (2011).…”