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

Nusiaputra, Yodha Y. 1; Wiemer, Hans-Joachim 1; Kuhn, Dietmar 1
1 Institut für Kern- und Energietechnik (IKET), Karlsruher Institut für Technologie (KIT)

Abstract:

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.


Volltext §
DOI: 10.5445/IR/1000042218
Originalveröffentlichung
DOI: 10.3390/en7074221
Scopus
Zitationen: 28
Web of Science
Zitationen: 23
Dimensions
Zitationen: 28
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Geowissenschaften (AGW)
Institut für Kern- und Energietechnik (IKET)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2014
Sprache Englisch
Identifikator ISSN: 1996-1073
urn:nbn:de:swb:90-422187
KITopen-ID: 1000042218
HGF-Programm 35.01.01 (POF II, LK 01) Effiziente Nutzung geotherm. Energie
Erschienen in Energies
Verlag MDPI
Band 7
Heft 7
Seiten 4221-4240
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Schlagwörter modularization; geothermal; Organic Rankine Cycle; specific investment cost; mean cash flow
Nachgewiesen in Dimensions
Scopus
Web of Science
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