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Energy and Environment, 1995

ISBN:
1-56700-052-5 (Print)

DESIGNING A CHP SYSTEM FOR A MULTI-FUNCTION APPLICATION

Mir-Akbar Hessami
Department of Mechanical and Aerospace Engineering, Monash University, Australia

Abstract

Combined heat and power (CHP) systems are known to be suitable for applications which require both low grade (heat) and high grade (power) energy simultaneously. CHP systems are proven to have a higher total efficiency compared to the traditional practice of heat and power production where only heat or power is generated without any concerns for the cycle efficiency. CHP systems suit applications such as community centres, retirement villages, hospitals, hotels, universities, schools, recreational facilities, and many industrial installations. In this paper, the process of designing a CHP system for a specific application (ie, a university including the dormitories and the recreational facilities) is described with specific reference to the past heat and power consumption profiles as well as the existing heat and power reticulation systems. The final design is comprised of one large gas-turbine-based CHP system (4.5 MW electric output) equipped with a waste-heat boiler (7.5 MW heat output), and two smaller CHP systems using gas-engines, one producing 580 kW of power and 1 MW of heat while the other generating 125 kW of electricity and 204 kW of heat. The primary fuel for the three systems is natural gas supplied by the grid.