Chapter 15 - Energy hub: modeling, control, and optimization

Abstract

Previously, different types of energy management systems were planned to operate independently, but nowadays with the development of efficient energy conversion and multigeneration systems, integrated energy systems are more eminent. The synergy of different forms of energies led to more efficient and sustainable solution to meet the energy demand of the world. Energy hub is a concept of integrating and converting different form of energies to form a system combined with storage capacities to meet the energy demand more efficiently. This chapter provides the solution to the problem of optimization of energy hub. It includes the mathematical model of energy hub including different constraints associated with it. The mathematical models of electrical, heat, and cold storages are also presented in this chapter. To make the energy hub more efficient, economical, and environment friendly, different types of renewable energies have been integrated to the proposed model. The problem of optimization of energy hub has been modeled as mixed integer linear programming and solved in GAMS (General Algebraic Modeling System) software. Four different types of case studies have been performed and analyzed on the proposed energy hub model. In case 1, simple energy hub model is optimized for electrical, heating, and cooling load. In case 2, energy storages (ES) are added to the energy hub which results in a decrease of its operating cost. In case 3, renewable energy resources (RERs) are added to the same hub which further reduces its operational cost. Finally, in case 4, both RERs and ES capacities are added in the proposed model and the results show that it is more beneficial to use both simultaneously for getting maximum benefit in its operational cost.