General performance evaluation method of integrated solar combined cycle (ISCC) system

Abstract

As a novel solar energy utilization method, integrated solar combined cycle (ISCC) system has the advantages of low investment and high efficiency, and has been paid more and more attention. How to evaluate the effectiveness of solar energy integration in different ISCC systems has become a significant issue. In this paper, based on the second law of thermodynamics and the principle of energy cascade utilization, according to different kinds of integration methods, different kinds of basic ISCC system models are divided and established; Compared with the gas turbine combined cycle (GTCC) system and solar energy generating system (SEGS), the effects caused by the integration of solar energy are revealed: the superimposed effect of the fuel saving factor and the efficiency enhancement of efficiency promotion factor are given. The comprehensive evaluation factor with simultaneous consideration of both the fuel saving factor and the efficiency promotion factor is put forward. Meanwhile, the applications of this evaluation factor in actual cases of this evaluation factor are also studied. This paper provides a novel evaluation method for comprehensively evaluate two different ISCC systems which will propose valuable guidance for further evaluation research of ISCC system.