Exergy, exergoeconomic, and exergoenvironmental optimization of the geothermal binary cycle power plant at Ampallas, West Sulawesi, Indonesia. (1st October 2020)

• Record Type: Journal Article
• Authors: Nasruddin, N.; Dwi Saputra, Irfan; Mentari, Tania; Bardow, André; Marcelina, Olga; Berlin, Susanto
• Is Part Of: Thermal science and engineering progress. Volume 19(2020)
• Publication Date: 2020-10-01
• Subjects: Life cycle analysis -- Exergoeconomics -- Exergy destruction -- Investment cost; Heat engineering -- Periodicals; Heat engineering; Thermodynamics; Periodicals; 621.402
• DOI: 10.1016/j.tsep.2020.100625
• Languages: English
• ISSNs: 2451-9049

Abstract

Highlights: This article deals with multi-objective optimization of two different geothermal binary power plant based on exergy, exergoeconomic and exergoenvironmental analysis. The article compared the binary cycle system with the Organic Rankine Cycle (ORC) of Isopentane as working fluid. The Kalina Cycle with ammonia-water mixture inside the system for power production. It demonstrates that the solution that has the highest exergetic efficiency is 82.12% with 8.19 cent$/kWh for the unit cost of the produced energy and 282.29 mPt/s for the total environmental impact. Abstract: This paper presents the multi-objective optimization of two different geothermal binary power plants based on exergy, exergoeconomic, and exergoenvironmental analysis of the geothermal binary cycle power plant located at Ampallas area, West Sulawesi, Indonesia. The study compares two binary cycle systems: the organic Rankine cycle (ORC), with isopentane as the working fluid, and the Kalina cycle with an ammonia-water mixture in the system for power production. In this study, MATLAB is combined simultaneously with Engineering Equations Solver software to simulate both binary systems and to optimize three objective functions with the genetic algorithm method. It is demonstrated that the ORC system has the highest exergy efficiency with 82.12%, a unit cost of the produced energy of 8.19 US cent/kWh and a total environmental impact of 282.29 mPt/s.