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URN: urn:nbn:de:swb:90-422187

Thermal-Economic Modularization of Small, Organic Rankine Cycle Power Plants for Mid-Enthalpy Geothermal Fields

Nusiaputra, Yodha Y.; Wiemer, Hans-Joachim; Kuhn, Dietmar

The costs of the surface infrastructure in mid-enthalpy geothermal power systems, especially in remote areas, could be reduced by using small, modular Organic Rankine Cycle (ORC) power plants. Thermal-economic criteria have been devised to standardize ORC plant dimensions for such applications. We designed a modular ORC to utilize various wellhead temperatures (120–170 °C), mass flow rates and ambient temperatures (−10–40 °C). A control strategy was developed using steady-state optimization, in order to maximize net power production at off-design conditions. Optimum component sizes were determined using specific investment cost (SIC) minimization and mean cashflow (MCF) maximization for three different climate scenarios. Minimizing SIC did not yield significant benefits, but MCF proved to be a much better optimization function.

Zugehörige Institution(en) am KIT Institut für Kern- und Energietechnik (IKET)
Institut für Angewandte Geowissenschaften (AGW)
Publikationstyp Zeitschriftenaufsatz
Jahr 2014
Sprache Englisch
Identifikator ISSN: 1996-1073
KITopen ID: 1000042218
HGF-Programm 35.01.01; LK 01
Erschienen in Energies
Band 7
Heft 7
Seiten 4221-4240
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Schlagworte modularization; geothermal; Organic Rankine Cycle; specific investment cost; mean cash flow
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