Optimal design of installation capacity and operation strategy for distributed energy system

Abstract

The economic and environmental performances of distributed energy system (DES) are closely dependent on its design and operation strategy. Based on the framework of simple cycle gas turbine, an optimization model of DES is built for multiple building complexes in this paper, where the minimum performance factor indicator (PFI) is taken as the objective function and the hourly energy balance between supply and demand is chosen as constraint. Not only the problem of the configuration for installation capacity can be solved, but the concept of time scale is introduced in the process of operation optimization, to minimize energy waste and achieve maximum economic and environmental benefits. Furthermore, an illustrative case study about capacity design and operation strategy of DES in one financial center is given to present the effectiveness of the proposed model. The result shows that the optimal installation capacity is 23.77MW while satisfying the energy demand of the terminal users. In comparison to separation production system, the primary energy consumption and carbon dioxide emission can be significantly reduced and the overall economy is improved when the DES adopts optimal installation capacity and operation strategy, which can provide theoretical reference for the actual design and operation of DES.