Tesla turbine; Fluid dynamics; ORC; geometric definition
Abstract :
[en] The Tesla turbine - also known as friction, viscous or bladeless turbine - is a peculiar expander, which generates power through viscous entrainment. In the last years, it has gained a renewed appeal due to the rising of distributed power generation applications. Indeed, this expander is not suitable to large size power generation, but it could become a breakthrough technology in the low power ranges, due to its characteristics of low cost and reliability.The current study presents a design approach to the Tesla turbine, applied to organic working fluids (R1233zd(E), R245fa, R1234yf, n-Hexane). Three fundamental geometric parameters are identified (rotor channel width/inlet diameter ratio, rotor outlet/inlet diameter ratio, throat width ratio) and their effects on the performance are analyzed. The geometry of the turbine has been defined and the assessment of the performance potential is run, applying a 2D code for the viscous flow solution, considering real compressible fluid properties.For all the investigated working fluids, an efficiency higher than 60% has been achieved, with the defined geometry, under suitable thermo fluid-dynamic conditions.
Disciplines :
Energy
Author, co-author :
Talluri, Lorenzo; Università degli Studi di Firenze - UniFI > Department of Industrial Engineering
Dumont, Olivier ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Systèmes énergétiques
Manfrida, Giampaolo; Università degli Studi di Firenze - UniFI > Department of Industrial Engineering
Lemort, Vincent ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Systèmes énergétiques
Fiaschi, Daniele; Università degli Studi di Firenze - UniFI > Department of Industrial Engineering
Language :
English
Title :
Geometry Definition and Performance Assessment of Tesla Turbines for ORC
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