Review of Gas Turbine Combined Heat and Power Systems

This paper presents a brief introduction of the gas turbine combined heat and power system. Taking full use of the rejected heat generated by the gas turbine, the efficiency of the combined systems is significantly improved as well as saving energy and cost. Unlike the simple cycle engine, the fundamental systems consisting of a gas turbine system, heat recovery steam generating system, cooling system and steam system, which makes the whole system complex and complicated. The performance, especially the part-load performance and ambient environment influences were investigated in order to understand the working characteristics of the combined system. Meanwhile, as the combined systems play a great role in mitigating pollution, the mechanism of emissions generation and curbing methods were described. The combined systems are of various usage and could easily adjust according to the requirements, which makes them prosperous in the industry. Finally, the promising future of the combined systems is discussed and concluded.