Multipurpose Utilization of Geothermal Resources of Crimea

Abstract

The increasing of economic efficiency of industrial utilization of thermal waters primarily calls for the adoption of available advanced technologies, apart from heat extraction, the recovery of useful components the waters contain: natural gas, iodine, bromine, etc. This situation stimulated development of a number of comprehensive technologies and two such technologies have been already put to use in two geothermal demonstration units.
First of the two is focused on the separation of gas from thermal water. The gas is fed to a converted diesel engine that drives an electric generator, while thermal potential of degassed water is used up in a heat-supply network. The technology-based demonstration plant was constructed at Medvedyevska site of Severo-Sivashskyee geothermal field in Crimea. Thermal water of this site has a temperature of 70oC and gas content of 1 M3 of gas per M3 of water. The demonstration plant generates 0.8 MW of heat and 60 kW of electricity.
The second technology implies the recovery of iodine and bromine from thermal water prior to directing the latter to a heat-supply system. A baromembrane lab-scale unit based on this technology was constructed at the Crimean Scientific Center of the Institute of Engineering Thermophysics of the NAS of Ukraine.