| Title | Thermodynamic Modeling and Exergy Analysis of a Heat Recovery System in Meshkinshahr Geothermal Power Plant, Iran |
|---|---|
| Authors | Behnam Radmehr, Sajjad Radmehr, Khosrow Bakhtari |
| Year | 2010 |
| Conference | World Geothermal Congress |
| Keywords | Single flash cycle, ORC, exergy, efficiency |
| Abstract | A 55 MW geothermal power plant is projected to be installed in the Sabalan geothermal field. The drilling of wells to support the 55 MW power plant started in June 2008. While in the drilling phase of the project, SUNA has considered installing a demonstration pilot 4 MW power plant using steam condensing turbine in a single flash cycle. The steam fraction of the two-phase fluid produced from geothermal wells in Sabalan is less than 20 percent. In a single flash cycle the brine phase is discarded still contains a huge volume of energy. The main objectives of this study are: to develop thermodynamic model and exergy analysis of a heat recovery system to produce electricity in an organic rankine cycle (ORC), parallel with single flash system using energy content of separated brine; pinpoint locations and quantities of exergy losses and wastes; and to determine the optimum performance parameters of the main components. The first and second law efficiencies and the productivity of geothermal fluid will be determined for single flash as well as for combined system. The Engineering Equation Solver (EES) software was used for developing and analyzing mathematical models of energy and exergy flows. Thermoeconomic analysis using obtained results can be considered for further work to help decision makers. |