Comparative techno-economic investigation of CCHP combined by GSHP based on response surface methodology

Abstract

In this paper, by combining subsystems such as Gas Turbine (GT), Organic Rankine Cycle (ORC), Absorption Refrigeration System (ARS), and Ground Source Heat Pump (GSHP), two scenarios with high performances have been proposed to provide power, heating, and cooling loads of a residential building. Using the central composite design method and statistical optimization based on the desirability function, the input parameters of each subsystem were determined based on the desired objective functions. For this purpose, techno-economic analysis of the two systems was performed with employing economic functions, and the best scenario was selected. The results show that using a combined GT/ORC/ARS system to supply the desired loads of a residential building is much better than the combined system of GT/ORC/GSHP with the same capacity from economical point of view. Sensitivity analysis of economic parameters of the superior scenario (interest ratio, lifetime, fuel cost, and electricity sell price on Net Present Value and Simple Payback Period) was also examined using the central composite design of response surface methodology.