Exergoeconomic Analysis of Combined-Cycle Cogeneration Plants With Supercritical Carbon Dioxide Power Cycle

Abstract

This article investigates the concept of a supercritical carbon dioxide (sCO2) bottoming cycle for a combined-cycle cogeneration (heat and power) plant. The application of sCO2 technology to the cogeneration and the combined-cycle plants leads to an increase in the energetic and economic effectiveness. Two systems were evaluated and compared to the commercially available systems. Exergetic, economic, and exergoeconomic analyses were applied to calculate the levelized cost of both products (heat and power). The system components with the highest associated cost rate were identified, and an optimization strategy was suggested. Based on the economic assumptions used, the levelized cost of the total product generated by the evaluated systems showed strong competitiveness compared to current technologies.