Electricity Generation Using R134a in Organic Rankine Cycle

Developing technology, and electronic devices, power consumption is increasing day by day. At the present time, there are many methods used to generate electricity. Most of these methods cause environmental pollution. The share of thermal power plants in electricity generation varies between 50% and 95% depending on the country. From this perspective, increasing electricity demand and environmental pollution have led the countries to find a clean methods to electricity generation. Alternative (renewable) energy systems can cover a small part of the energy exigency of countries but these resources are not enough when it comes to electricity production. In this case the Organic Rankine Cycle (ORC) stands out to us as a promising development. It is possible to generate electricity when (ORC) systems are combined with low temperature sources such as renewable energy sources and waste heat sources (flue gas, etc.), and this not only helps to need the electricity need, but also avoids environmental pollution caused by fossil fuels. In this study, we also present the variable R134a fluids with low ozone depletion potential (ODP), a non-toxic and nonflammable fluid in the ORC system for energy recovery, and energy recovery using oil heat used to cool turbine bearings in a gas turbine at different source temperatures. In this context, parameters such as energy conversion performance, thermal efficiency, change of network value, turbine ratio, temperature drop, electrical energy and turbine shaft rotation speed of ORC system have been analyzed and experimentally. On the system, temperature, pressure and flow values at some critical points are measured. The results of the experiments are as follows: 2.5 lt / min deburring and 82.4 ℃welding temperature th = 3.4%, while the result is minimum at 3.8 lt / min and 79.4 ℃ welding temperature th, = 8.7% with the maximum value. With a welding temperature of 77.1 ℃, a minimum thermal efficiency of thth = 7.3% was obtained at a yield of 3.8 l / min. The maximum electric power is obtained at Gthe = 0.336 kW, maximum turbine expansion ratio rt = 1.64, 3 lt / min flow rate, maximum turbine shaft speed n = 925 rpm and at the welding temperature of 87.7 ℃. It has been observed that as the result of the experiments R134a fluid increases, the temperature drop T increase in the turbine, the turbine shaft speed n, the turbine expansion rate and consequently the thermal efficiency of the system increases.