DESIGN, OPTIMIZATION AND EXPERIMENTAL INVESTIGATION OF VARIOUS SMALL-SCALE ORC EXPANDERS IN A BIOMASS COGENERATION PLANT
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F25%3A00385576" target="_blank" >RIV/68407700:21220/25:00385576 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21720/25:00385576
Result on the web
<a href="https://lutpub.lut.fi/bitstream/handle/10024/170511/ORC2025_proceedings_public.pdf?sequence=1&isAllowed=y" target="_blank" >https://lutpub.lut.fi/bitstream/handle/10024/170511/ORC2025_proceedings_public.pdf?sequence=1&isAllowed=y</a>
DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
DESIGN, OPTIMIZATION AND EXPERIMENTAL INVESTIGATION OF VARIOUS SMALL-SCALE ORC EXPANDERS IN A BIOMASS COGENERATION PLANT
Original language description
This paper presents the design, optimization, and experimental investigation of three small-scale ORC expanders — one rotary vane expander and two turbines (a single-stage axial impulse turbine and a radial re-entry turbine called Elektra) — developed for an operational biomass-fired CHP unit. All expanders were tested in a 120 kWth woodchip-fired ORC plant at CTU UCEEB. The rotary vane expander demonstrated broad operational flexibility, moderate efficiency sensitivity to boundary conditions, and over 10,000 hours of run time, though it requires periodic maintenance. The Elektra turbine, designed as a low-rpm standard generator alternative using in-house 1D meanline modeling and CFD optimization, achieved around 34.8% efficiency at 3,000 rpm. The axial impulse turbine, optimized via genetic algorithms, reached over 61% efficiency and 7 kW output at 14,000 rpm. Techno-economic analysis showed that the rotary vane expander achieved the lowest specific plant costs, while the axial turbine delivered the highest efficiency at increased cost. The Elektra turbine, despite its low capital cost, exhibited limited performance and the highest plant-specific costs. Experimental results validated the design tools and provided comparative insight into expander suitability for small-scale CHP applications.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
20704 - Energy and fuels
Result continuities
Project
<a href="/en/project/TO01000160" target="_blank" >TO01000160: Optimised expanders for small-scale distributed energy systems</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Proceedings of the 8th International Seminar on ORC Power Systems
ISBN
978-952-412-288-7
ISSN
2243-3376
e-ISSN
2243-3376
Number of pages
10
Pages from-to
92-101
Publisher name
LUT Scientific and Expertise Publications
Place of publication
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Event location
Lappeenranta
Event date
Sep 9, 2025
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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