Abstract
Manufactures are searching for possibilities to increase the efficiency of combustion engines by using the remaining energy of the exhaust gas. One possibility to recover some of this thermal energy is an organic Rankine cycle (ORC). For such an ORC running with ethanol, the aerothermodynamic design and test of a supersonic axial, single stage impulse turbine generator unit is described. The blade design as well as the regulation by variable partial admission is shown. Additionally the mechanical design of the directly coupled turbine generator unit including the aerodynamic sealing and the test facility is presented. Finally the results of CFD-based computations are compared to the experimental measurements. The comparison shows a remarkably good agreement between the numerical computations and the test data.
Highlights
Automotive manufacturers are permanently searching for possibilities to increase the efficiency of internal combustion engines to reduce the fuel consumption and the emission of greenhouse gases
The four working processes of an organic Rankine cycle (ORC) are shown in figure 1
Design of the turbine generator unit The boundary conditions of the ORC are quite ambitious for turbines due to the combination of a low mass flow with a very high pressure ratio
Summary
This content has been downloaded from IOPscience. Ser. 821 012023 (http://iopscience.iop.org/1742-6596/821/1/012023) View the table of contents for this issue, or go to the journal homepage for more. 1st International Seminar on Non-Ideal Compressible-Fluid Dynamics for Propulsion & Power IOP Publishing IOP Conf.
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