Abstract
The article deals with a description of results from research and development of the cantilever micro-turbine designed for the ORC power plants. The experimental turbine stage and used numerical models are briefly described. In the first part the comparison of measured and CFD results is presented. The second part deals with an investigation of the outlet geometry influence on the turbine working parameters. The results are relevant for next studies in the research and development process.
Highlights
Organic Rankine Cycle (ORC) power plants are a viable option for decentralized small scale stationary energy converters (< 100 kWel) heated by e.g. waste heat in industry, waste heat of internal combustion engines, geothermal heat or even solar radiation
An ORC power plant works like a coal fired steam power plant: A steam power plant pumps water on high pressure, heats and evaporates it in the steam generator, expands the steam in a turbine which drives the generator and condenses it back to liquid state in a condenser
This article deals with possibilities of CFD simulations of small turbines which usually work with fluids mentioned above
Summary
Organic Rankine Cycle (ORC) power plants are a viable option for decentralized small scale stationary energy converters (< 100 kWel) heated by e.g. waste heat in industry, waste heat of internal combustion engines, geothermal heat or even solar radiation. An ORC power plant works like a coal fired steam power plant: A steam power plant pumps water on high pressure, heats and evaporates it in the steam generator, expands the steam in a turbine which drives the generator and condenses it back to liquid state in a condenser. The difference of ORC to conventional steam cycle is that instead of water, another fluid like e.g. an alcohol, a refrigerant or siloxanes is used. This article deals with possibilities of CFD simulations of small turbines which usually work with fluids mentioned above. Results from CFD simulations and measurement of the cantilever turbine with radial inlet direction into stator channels and axi-radial outlet from rotor are shown.
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