Design and aerodynamic analysis of 50 kw combine cooling, heating and power (CCHP) micro-gas turbine plant and its vaneless centrifugal compressor

摘要

CCHP systems for residential buildings is one of the solution that can eliminate the energy crises in developing countries, with lesser use of fossils fuels along with reduction in carbon dioxide levels in environment. In the present research work a 50 kW micro gas turbine of combined heating, cooling and power plant is designed. The optimum pressure ratio is calculated with the highest efficiency and minimum specific fuel consumption, in order to design a centrifugal compressor of gas turbine. Detailed performance assessment and aerodynamic analysis of designed compressor is conducted. Numerical simulation predicted excellent results, which is similar to the calculated performance. The association of the wake and secondary flow vortex in the impeller is discussed. Coriolis force has augmenting effects in flow characteristic of centrifugal impeller. The Coriolis force and its effects in the wake region and tendency of boundary layer separation is discussed.