The TESLA turbine is an original expander working on the principle of torque transmission by wall shear stress. The principle - demonstrated for air expanders at lab scale - has some attractive features when applied to ORC expanders: it is suitable for handling limited flow rates (as is the case for machines in the range from 500W to 5 kW), it can be developed to a reasonable size (rotor of 0.1 to 0.3 m diameters), with possible rotational speeds (which range from 1000 to 12000 rpm). The original concept was revisited, improving the stator layout (which is the main responsible for poor performance) and developing a modular design allowing to cover a wide power range, as well as a perfectly sealed operation and other fluid dynamics improvements. The flow model was developed using complete real fluid assumptions, and includes several new concepts such as bladed channels for the stator and detailed treatment of losses. Preliminary design sketches are presented and results discussed and evaluated.

A revised Tesla Turbine Concept for ORC applications / Manfrida, Giampaolo; Pacini, Leonardo; Talluri, Lorenzo. - In: ENERGY PROCEDIA. - ISSN 1876-6102. - ELETTRONICO. - 129:(2017), pp. 1055-1062. (Intervento presentato al convegno 4th International Seminar on Organic Rankine Cycle (ORC) Power Systems, ORC 2017 tenutosi a Politecnico di Milano Bovisa Campus, ita nel 2017) [10.1016/j.egypro.2017.09.115].

A revised Tesla Turbine Concept for ORC applications

MANFRIDA, GIAMPAOLO;PACINI, LEONARDO;TALLURI, LORENZO
2017

Abstract

The TESLA turbine is an original expander working on the principle of torque transmission by wall shear stress. The principle - demonstrated for air expanders at lab scale - has some attractive features when applied to ORC expanders: it is suitable for handling limited flow rates (as is the case for machines in the range from 500W to 5 kW), it can be developed to a reasonable size (rotor of 0.1 to 0.3 m diameters), with possible rotational speeds (which range from 1000 to 12000 rpm). The original concept was revisited, improving the stator layout (which is the main responsible for poor performance) and developing a modular design allowing to cover a wide power range, as well as a perfectly sealed operation and other fluid dynamics improvements. The flow model was developed using complete real fluid assumptions, and includes several new concepts such as bladed channels for the stator and detailed treatment of losses. Preliminary design sketches are presented and results discussed and evaluated.
2017
Energy Procedia
4th International Seminar on Organic Rankine Cycle (ORC) Power Systems, ORC 2017
Politecnico di Milano Bovisa Campus, ita
2017
Goal 7: Affordable and clean energy
Goal 9: Industry, Innovation, and Infrastructure
Manfrida, Giampaolo; Pacini, Leonardo; Talluri, Lorenzo
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1100560
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