Techno-Economic Assessment of the Supercritical Carbon Dioxide Enhanced Geothermal Systems

Mauro Tagliaferri, Paweł Gładysz (), Pietro Ungar, Magdalena Strojny, Lorenzo Talluri, Daniele Fiaschi, Giampaolo Manfrida, Trond Andresen and Anna Sowiżdżał
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Mauro Tagliaferri: Department of Industrial Engineering, University of Florence, 50121 Firenze, Italy
Paweł Gładysz: Faculty of Energy and Fuels, AGH University of Science and Technology, 30-059 Kraków, Poland
Pietro Ungar: Department of Industrial Engineering, University of Florence, 50121 Firenze, Italy
Magdalena Strojny: Faculty of Energy and Fuels, AGH University of Science and Technology, 30-059 Kraków, Poland
Lorenzo Talluri: Department of Industrial Engineering, University of Florence, 50121 Firenze, Italy
Daniele Fiaschi: Department of Industrial Engineering, University of Florence, 50121 Firenze, Italy
Giampaolo Manfrida: Department of Industrial Engineering, University of Florence, 50121 Firenze, Italy
Trond Andresen: SINTEF Energy Research, 7034 Trondheim, Norway
Anna Sowiżdżał: Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, 30-059 Kraków, Poland

Sustainability, 2022, vol. 14, issue 24, 1-20

Abstract: Enhanced geothermal systems distinguish themselves among other technologies that utilize renewable energy sources by their possibility of the partial sequestration of carbon dioxide (CO 2 ). Thus, CO 2 in its supercritical form in such units may be considered as better working fluid for heat transfer than conventionally used water. The main goal of the study was to perform the techno-economic analysis of different configurations of supercritical carbon dioxide-enhanced geothermal systems (sCO 2 -EGSs). The energy performance as well as economic evaluation including heat and power generation, capital and operational expenditures, and levelized cost of electricity and heat were investigated based on the results of mathematical modeling and process simulations. The results indicated that sCO 2 mass flow rates and injection temperature have a significant impact on energetic results and also cost estimation. In relation to financial assessment, the highest levelized cost of electricity was obtained for the indirect sCO 2 cycle (219.5 EUR/MWh) mainly due to the lower electricity production (in comparison with systems using Organic Rankine Cycle) and high investment costs. Both energy and economic assessments in this study provide a systematic approach to compare the sCO 2 -EGS variants.

Keywords: enhanced geothermal systems; CO 2 -EGS; supercritical carbon dioxide cycles; Organic Rankine Cycle; combined heat and power; geothermal energy (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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