Preprint Article Version 1 This version is not peer-reviewed

Two-Level Evolutionary Multi-Objective Optimization of a District Heating System with Distributed Cogeneration

Version 1 : Received: 17 October 2018 / Approved: 18 October 2018 / Online: 18 October 2018 (11:53:15 CEST)

A peer-reviewed article of this Preprint also exists.

Casisi, M.; Costanzo, S.; Pinamonti, P.; Reini, M. Two-Level Evolutionary Multi-objective Optimization of a District Heating System with Distributed Cogeneration. Energies 2019, 12, 114. Casisi, M.; Costanzo, S.; Pinamonti, P.; Reini, M. Two-Level Evolutionary Multi-objective Optimization of a District Heating System with Distributed Cogeneration. Energies 2019, 12, 114.

Journal reference: Energies 2018, 12, 114
DOI: 10.3390/en12010114

Abstract

The paper deals with the modelization and optimization of an integrated multi-component energy system. On-off operation and presence-absence of components must be described by means of binary decision variables, besides equality and inequality constraints; furthermore, the synthesis and the operation of the energy system should be optimized at the same time. In this paper a hierarchical optimization strategy is used, adopting a genetic algorithm in the higher optimization level, to choose the main binary decision variables, whilst a MILP algorithm is used in the lower level, to choose the optimal operation of the system and to supply the merit function to the genetic algorithm. The method is then applied to a distributed generation system, which has to be designed for a set of users located in the center of a small town in the North-East of Italy. The results show the advantage of distributed cogeneration, when the optimal synthesis and operation of the whole system are adopted, and significant reduction in the computing time by using the proposed two-level optimization procedure.

Subject Areas

District Heating; multi-objective evolutionary optimization; distributed cogeneration; optimal operation.

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