A Retrofit for Geothermal Organic Rankine Cycles based on Concentrated Solar Thermal Systems. (September 2017)

• Record Type: Journal Article
• Authors: Heberle, Florian; Hofer, Markus; Brüggemann, Dieter
• Is Part Of: Energy procedia. Volume 129(2017)
• Page Start: 692
• Page End: 699
• Publication Date: 2017-09
• Subjects: Organic Rankine Cycle -- geothermal -- solar -- hybrid -- retrofit -- off-design calculations; Power resources -- Congresses; Power resources -- Periodicals; Power resources; Conference proceedings; Periodicals; 333.7905
• DOI: 10.1016/j.egypro.2017.09.148
• Languages: English
• ISSNs: 1876-6102

Abstract

Abstract: In this study, a solar thermal retrofit unit for geothermal ORC power plants is analysed under thermodynamic and technical aspects. For the retrofit, the ORC module is extended by a solar superheater and the additional heat input is realized by parabolic trough collectors. The evaluation of the entire system is based on simulations over the period of one year. Therefore, a case study considering geothermal conditions of the Aydin-Salavatli field in the Büyük Menderes Graben in Turkey is conducted. Quasi-stationary simulations of the system are performed considering off-design behaviour of the power plant components. The calculations are based on hourly climate data. The obtained operational parameter of the ORC and solar-field emphasise the technical feasibility of the selected superheating concept in the context of thermal stability of the working fluid. For the considered solar-field sizes, the annually generated electricity is increased up to 4.5 % compared to the stand-alone geothermal power plant.