Cold Aerodynamic Testing of Additively Manufactured Turboexpanders and its Potential for ORC Applications

Kód výsledku v IS VaVaI

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RIV/68407700:21720/21:00353803

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Cold Aerodynamic Testing of Additively Manufactured Turboexpanders and its Potential for ORC Applications

Popis výsledku v původním jazyce

Widespread application of distributed energy systems using thermodynamic cycles is hindered by the absence of efficient and cost-effective expanders. Additive manufacturing offers an interesting option for customization and low-cost manufacturing of turboexpander components, especially for low-temperature machines using polymer materials. This work brings a short insight into additive manufacturing issues concerning its potential for small and micro-scale turbomachinery. A summary of experimental results from cold aerodynamic testing of three geometrical configurations of proof-of-concept additively manufactured single-stage axial impulse turbines and one configuration of a radial impulse cantilever turbine is presented in the contribution. The performance was investigated on a pneumatic test rig dedicated for expander measurements. The power output of these testing turbines was in hundreds of watts. For the comfort of measurement, the partial admission was relatively low, hindering overall efficiency. The comparative results between different configurations and manufacturing methods and materials are, however, the most valuable. The highest obtained efficiency was around 40% with nylon components from selective laser sintering method. Each of the manufacturing methods is evaluated based on experience and performance. The conclusions drawn from the cold air testing will then be transferred towards implementing additively manufactured flow components into the development of ORC turboexpanders for the future micro ORC units.

Název v anglickém jazyce

Cold Aerodynamic Testing of Additively Manufactured Turboexpanders and its Potential for ORC Applications

Popis výsledku anglicky

Widespread application of distributed energy systems using thermodynamic cycles is hindered by the absence of efficient and cost-effective expanders. Additive manufacturing offers an interesting option for customization and low-cost manufacturing of turboexpander components, especially for low-temperature machines using polymer materials. This work brings a short insight into additive manufacturing issues concerning its potential for small and micro-scale turbomachinery. A summary of experimental results from cold aerodynamic testing of three geometrical configurations of proof-of-concept additively manufactured single-stage axial impulse turbines and one configuration of a radial impulse cantilever turbine is presented in the contribution. The performance was investigated on a pneumatic test rig dedicated for expander measurements. The power output of these testing turbines was in hundreds of watts. For the comfort of measurement, the partial admission was relatively low, hindering overall efficiency. The comparative results between different configurations and manufacturing methods and materials are, however, the most valuable. The highest obtained efficiency was around 40% with nylon components from selective laser sintering method. Each of the manufacturing methods is evaluated based on experience and performance. The conclusions drawn from the cold air testing will then be transferred towards implementing additively manufactured flow components into the development of ORC turboexpanders for the future micro ORC units.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20301 - Mechanical engineering

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the 6th International Seminar on ORC Power Systems

ISBN

978-3-00-070686-8

ISSN

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e-ISSN

2709-7609

Počet stran výsledku

146

Strana od-do

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Název nakladatele

Technical University of Munich

Místo vydání

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Místo konání akce

virtual format

Datum konání akce

11. 10. 2021

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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