Cycle Analysis on Ocean Geothermal Power Generation using Multi-staged Turbine

Abstract

In our study, with ocean geothermal generation cycle applied in the simulation, we compared the performance of the cycle depending on the various working fluids and sea water temperature. We compared a performance advanced cycle with multistage turbines to the basic cycle depending on the various analysis conditions. For the total output 200kW, the temperature of the cold source is 5 ℃. The temperature of the warm source from geothermal water was 65℃, 75℃, and 85℃. R-134a and R-245fa were applied as the working fluid. The result of the simulation was as follows. The performance advanced cycle applied multistage turbines and the performance advanced cycle applied multistage turbine as well as reheater increased the efficiency of the cycle by 20% compared to the basic cycle, when the temperature of the cold source and warm source were respectively 5℃, 75℃, and the working fluid was R-245fa. In addition, R-134a was more efficient working fluid than R-245fa at 65℃in the same cycle. On the other hand, R-245fa worked more efficiently than R-134a by 8.26% at 85℃.tage turbines to the basic cycle depending on the various analysis conditions. For the total output 200kW, the temperature of the cold source is 5 ℃. The temperature of the warm source from geothermal water was 65℃, 75℃, and 85℃. R-134a and R-245fa were applied as the working fluid. The result of the simulation was as follows. The performance advanced cycle applied multistage turbines and the performance advanced cycle applied multistage turbine as well as reheater increased the efficiency of the cycle by 20% compared to the basic cycle, when the temperature of the cold source and warm source were respectively 5℃, 75℃, and the working fluid was R-245fa. In addition, R-134a was more efficient working fluid than R-245fa at 65℃in the same cycle. On the other hand, R-245fa worked more efficiently than R-134a by 8.26% at 85℃.