This work introduces a modular experimental micro turboexpander system designed to perform air turbine tests of a radial impulse cantilever turbine. The system has high modularity and is intended primarily to test flow-path components which are manufactured by 3D printing and rapid prototyping. System design from the fluid dynamic viewpoint is based on a previously described tool proven and validated during the design of micro turboexpanders in range of mainly dozens of kW. In order to achieve maximal simplicity, the system uses a converted aeromodelling motor as a permanent magnet generator and housing for bearings. Overall parameters are obtained from electrical performance and known generator’s characteristics. The mechanical design then takes into account request of simplicity, modularity and properties of materials in additive manufacturing, especially plastics. First experimental tests show a comparison between different manufacturing technologies and resulting flow components surface roughness and the impact of pressure ratio on the isentropic efficiency.
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8 March 2021
19TH CONFERENCE ON POWER SYSTEM ENGINEERING
8–10 September 2020
Pilsen, Czech Republic
Research Article|
March 08 2021
3D printed radial impulse cantilever micro-turboexpander for preliminary air testing Available to Purchase
Jan Spale;
Jan Spale
a)
1
Czech Technical University in Prague, University Centre for Energy Efficient Buildings
, Trinecka 1024, Bustehrad, 27343, Czech Republic
a)Corresponding author: [email protected]
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Vaclav Novotny;
Vaclav Novotny
b)
1
Czech Technical University in Prague, University Centre for Energy Efficient Buildings
, Trinecka 1024, Bustehrad, 27343, Czech Republic
2
Czech Technical University in Prague, Faculty of Mechanical Engineering
, Technicka 4, Praha 6, 16607, Czech Republic
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Vojtech Mares;
Vojtech Mares
c)
2
Czech Technical University in Prague, Faculty of Mechanical Engineering
, Technicka 4, Praha 6, 16607, Czech Republic
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Andreas P. Weiß
Andreas P. Weiß
d)
3
University of Applied Sciences Amberg-Weiden, Center of Excellence for Cogeneration Technologies
, Kaiser-Wilhelm-Ring 23, 92224 Amberg, Germany
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Jan Spale
1,a)
Vaclav Novotny
1,2,b)
Vojtech Mares
2,c)
Andreas P. Weiß
3,d)
1
Czech Technical University in Prague, University Centre for Energy Efficient Buildings
, Trinecka 1024, Bustehrad, 27343, Czech Republic
2
Czech Technical University in Prague, Faculty of Mechanical Engineering
, Technicka 4, Praha 6, 16607, Czech Republic
3
University of Applied Sciences Amberg-Weiden, Center of Excellence for Cogeneration Technologies
, Kaiser-Wilhelm-Ring 23, 92224 Amberg, Germany
a)Corresponding author: [email protected]
AIP Conf. Proc. 2323, 070002 (2021)
Citation
Jan Spale, Vaclav Novotny, Vojtech Mares, Andreas P. Weiß; 3D printed radial impulse cantilever micro-turboexpander for preliminary air testing. AIP Conf. Proc. 8 March 2021; 2323 (1): 070002. https://doi.org/10.1063/5.0041433
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