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POWER GENERATION FROM LOW TEMPERATURE LIQUID DOMINATED GEOTHERMAL SYSTEMS UTILIZING A BINARY POWER PLANT
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Date
2022-8
Author
Taji, Oubaida
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Sustainable and renewable energy became of great importance in a world threatened by its climate change and its ever-increasing population. Among the sustainable, renewable, and environmentally friendly energy sources, namely solar, wind, wave and tide, geothermal energy distinguishes itself as it provides supply and storage security. In this study, an explicit, analytical spreadsheet model has been developed, estimating the power generated from a binary power plant utilizing low temperature liquid-dominated geothermal system. Production from a hypothetical reservoir is simulated using a single-tank Lumped-Parameter Model (LPM), which is verified against industry standard TOUGH2 code for a 30-day test period. For the development of the explicit LPM, two new explicit pressure and temperature equations are derived. The developed LPM; can simulate variable production/injection rates at variable injection temperatures, takes into account the conductive and convective heat transfer mechanisms, is coupled with a steady state reservoir flow and thermal wellbore flow models. Four production/injection scenarios have been considered. The case 4, with constant production rate of 1000 kg/s, constant re-injection of 100 kg/s at binary power plant outlet temperature, achieved the highest power output of 11.5E+06 MWh with 81% capacity factor, saving 1.15E+10 kg CO2 equivalent of emissions if same amount of power were to be generated from coal fired plant.
Subject Keywords
Geothermal energy
,
Low temperature liquid-dominated reservoir
,
Lumped-Parameter model
,
Non-isothermal
,
Single-liquid phase
URI
https://hdl.handle.net/11511/99794
Collections
Northern Cyprus Campus, Thesis
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O. Taji, “POWER GENERATION FROM LOW TEMPERATURE LIQUID DOMINATED GEOTHERMAL SYSTEMS UTILIZING A BINARY POWER PLANT,” M.S. - Master of Science, Middle East Technical University, 2022.