Recovery of waste heat in a geothermal power plant with thermoelectric generators system installation and performance evaluation

The use and evaluation of renewable energy sources is gaining importance over time. Geothermal energy is one of the most important renewable and useful energy sources in our world. Geothermal energy is utilized in many fields such as electricity generation, greenhouse, residential heating and drying factories. Since geothermal power plants are domestic capital in our country, their number is increasing rapidly and they make a major contribution to the national economy. It is very important that the energy, which is the most important need of the whole world, is produced in the cheapest and most efficient way. Regardless of how much efficiency is improved in all power plants, improvements are still made, yet there are still energy sources for production. The yield rate in geothermal power plants is around 12%. In our power plant, there is hot water around 99-100 °C going to injection wells or blowdown in separator systems and cold water around 20-25 °C for cooling the system. By using these two inert energy sources, peltier system can be used to generate energy and to illuminate the battery after storage. In this way, it is planned to reduce the internal consumption of the power plant at night. In addition, the system is examined by the Laws 1 and 2 of thermodynamics. Energy exergy efficiencies of the systems are as follows; The energy efficiency of the first peltier system was found to be %0,0019. The exergy efficiency of the system was %98,91. The energy efficiency of the second peltier system was found to be %0,00194. The exergy efficiency of the system was found to be %98,776. In another study, surface temperatures of the systems were analyzed by heat transfer and the results are as follows; In the examination of the first system, the temperature at the surface where the transfer of heat and heat transfer is in contact with the hot fluid is 94,121 °C. After the heat transfer of this hot fluid to the outer surface by conduction, the outer surface temperature is 92,310 °C. In the examination of the first system, the temperature at the surface where the transfer and heat transfer with the cold fluid comes into contact is 28,448 °C. The temperature of the outer surface is 28,054 °C after the heat transfer of this cold fluid to the outer surface by conduction at the point where it contacts the peltier. In the examinations of the second system, the temperature at the surface where the transfer of heat and heat transfer is in contact with the hot fluid is 93,744 °C. After the heat transfer of this hot fluid to the outer surface by conduction, the outer surface temperature is 91,703 °C. In the examinations of the second system, the temperature at the surface where the heat transfer and heat transfer is in contact with the cold fluid is 28,605 °C. The temperature of the outer surface is 28,075 °C after the heat transfer of this cold fluid to the outer surface by conduction at the point where it contacts the peltier. When the results were checked for verification with measuring instruments, it was observed that the system was compatible with each other. As a result of this study, 0.04699 kWh from the first unit and 0.0462 kWh of electricity from the second unit were provided. With these productions, the initial installation costs provide a return in seven years. The battery and inverter system is suitable for the installation of more peltier systems and the generation of electricity. This will allow the initial installation cost to be returned in a shorter period of time because more electricity is produced.