Preliminary assessment of the efficiency of ORC plant operation supplied with hot water from the HDR system

The paper presents the results of a theoretical analysis of the low-temperature ORC power plant operation fed with hot water obtained in a hot dry rock (HDR) extraction system. Issues related to the energy content of the Earth interior and its resources are discussed. The principles of acquiring heat in HDR installation are described and examples of installations commissioned in Europe as well as around the world are presented. The appropriate locations for building HDR installations in Poland were also characterized. Presented also is the concept of the ORC power plant supplied with water heated in the HDR rock exchanger. The analysis and evaluation of the ORC/HDR power plant operation supplied with water with parameters possible to obtain in selected locations throughout the country was accomplished. It has been shown that it is possible to build an ORC power plant powered from the HDR resources.