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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F21%3A00353803" target="_blank" >RIV/68407700:21220/21:00353803 - isvavai.cz</a>

Alternative codes found

RIV/68407700:21720/21:00353803

Result on the web

—

DOI - Digital Object Identifier

—

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20301 - Mechanical engineering

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2021

Confidentiality

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

Article name in the collection

Proceedings of the 6th International Seminar on ORC Power Systems

ISBN

978-3-00-070686-8

ISSN

—

e-ISSN

2709-7609

Number of pages

146

Pages from-to

—

Publisher name

Technical University of Munich

Place of publication

—

Event location

virtual format

Event date

Oct 11, 2021

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

—