Publications

The present study investigates the impact of hydro-mechanical-thermal processes during geothermal power production to the overall system performance. This system consists of four major aspects viz reservoirs, boreholes, heat exchangers i.e. injection well and production well, and power plants. Existing simulations are all partial therein lies the simplication of interactions between all aspects and lack of interfaces between all partial simulations. Multiphysics is introduced as an approach of iteration to couple all aspects, including coupled processes particularly fluid flow and heat transfer, thereafter allows arbitrary couplings to other physics interfaces says chemical couplings, physical couplings and mechanical couplings. It is initialized by a subsurface geothermal water cycle coupling, which brings together the reservoir and boreholes, followed by a connection to the surface heat exchanger cycle, which brings the injection well and the production well into the former couple, and finally an overall coupled simulation which includes the power plant cycle coupling. Sensitivity analysis regarding the production rate and injection temperature will be performed with respect to field data from Groß Schönebeck, Germany, with a lifespan of 30 years taken into account. This coupling is essential to predict the life cycle behaviour of reservoir thereafter the cumulated electricity provision of the overall geothermal system.

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Wong, L. (2011): Conceptual model for simulating power plant - borehole and deep geothermal reservoir system. 2nd European Geothermal PhD Day (Reykjavik, Iceland 2011).