Design optimization of small-scale ORC cycles for fluctuating heat source
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F22%3A00361429" target="_blank" >RIV/68407700:21220/22:00361429 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.3384/ecp192029" target="_blank" >https://doi.org/10.3384/ecp192029</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3384/ecp192029" target="_blank" >10.3384/ecp192029</a>
Alternative languages
Result language
angličtina
Original language name
Design optimization of small-scale ORC cycles for fluctuating heat source
Original language description
Organic Rankine cycles (ORC) are efficient technologies for waste heat recovery (WHR)at low to mid temperatures. For the design of ORC power cycles, several thermodynamic parameters should be considered. A challenge related to small scale (<50 kW) ORC cycles is to define the optimal process given frequent variability in a heat source. Many relevant applications require robust ORC systems to perform under varying heat source loads. This is an area where the body of knowledge must be further developed.In this work, the design of small-scale ORC cycles with varying heat source conditions is addressed by means of system modelling, simulation, and optimization. A framework is presented that consists of multi-scale optimization for the design of small-scale ORC systems considering seasonal and hourly heat source variations. The framework is developed as a flexible tool allowing to include fit-for-purpose models of key elements of the cycle, such as expander and heat exchanger, to suitably simulate off-design performance.The optimization framework has been tested on a case study representing a woodchips-fired micro-cogeneration unitviaORC. The case study is representative of an existing unit operating at the Czech Technical University (CTU) in Prague. The results indicate that the tooldelivers an ORC design that has a 5 % larger accumulated power production with the hourly variation of the heat source duringoneyear than the original ORC solely optimized at the design heatsourcecondition.The optimal ORC system also showsa 33 % smaller nominalcapacityand size of heat exchangersthan the ORC at the reference design, indicating a potential reduction in the capital cost.
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
2022
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 63rd International Conference of Scandinavian Simulation Society
ISBN
978-91-7929-545-5
ISSN
1650-3686
e-ISSN
1650-3740
Number of pages
6
Pages from-to
204-209
Publisher name
Linköping University
Place of publication
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Event location
Trondheim
Event date
Sep 20, 2022
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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