Browsing by Subject "flash cycle"

Now showing 1 - 1 of 1

Access status: Open Access ,
Assessment of possibilities of electricity production in flash geothermal system in Poland
(Wydawnictwa AGH, 2017) Barbacki, Antoni; Pająk, Leszek
An analytical method is described that expresses the specifi c power of a flash geothermal power plant with flash temperature regarded as a variable. The analysis was carried out for a condensation temperature for fluid exiting a theoretical turbine and for a given geothermal reservoir temperature. The method is a linear approximation of the established method for optimizing separator pressure. This linear approximation makes it possible to obtain an analytical expression for the optimum flash temperature (fixing the separation pressure) at which the maximal specific power is obtained. A discussion arose in Poland during extensive research related to the application of binary systems, HDR (Hot Dry Rock), and EGS (Enhanced Geothermal System) technologies for the production of electricity. This concerned the hypothetical possibility of using geothermal flash systems for this purpose. Therefore, the above procedure was applied to Polish geothermal conditions to assess the theoretical possibilities of operating such systems at the reservoir temperatures anticipated in Poland. In the lower Triassic formations in central Poland, there are geothermal resources with temperatures hovering above 130°C. However, low net power values were estimated following the application of the procedure, when combined with the large investment costs involved (the high-temperature resources lie at a depth more than 4000 m), this is not condusive for the efficient application of such systems. On the other hand, the possible application of binary systems to electricity production in that area is realistic and justified.