To use efficiently geothermal energy in Germany for electricity generation it is necessary to consider realistically the above-ground power plant technologies which are best suited for this purpose. The project aims to optimise the most appropriate power plant concepts, while fully considering at the same time the sensible heat extraction potential.

Modelling of the ORC and the Kalina process schemes will yield a quantitative comparison between the concepts and the various process schemes which are suitable for geothermal application. On the basis of already realised geothermal projects, reference power plants for electricity generation will be selected.

To evaluate the influence of the varying operating conditions or of changes in the geothermal conditions, sensitivity analyses will be performed. The equipment responsible for the largest losses in the plant will be identified and drawn into the optimisation process, aimig at maximising the gross and net efficiencies of the electricity generating plant.

Available expertise in optimised plant components and alternative working fluids will then be fed into these plant optimisation studies. On the other hand, the potential environmental impact from the working fluid during disruptions in plant operation or accidental leaks will also be considered.

The project will enable a conclusion to be drawn on the economically most feasible utilisation of geothermal energy in Germany for electricity generation and will help quantify the overall potential towards covering the German electricity demand from this particular renewable source. It will also determine which is the most appropriate plant configuration for the geothermal conditions prevailing in Germany.

Financed by the Federal Republic of Germany through the

following a decision of the German Federal Parliament