Publication detail
The numerical model of alfa Stirling engine modification
SIKORA, M. VLACH, R.
Czech title
Numerický model Stirlingova motoru alfa konfigurace
English title
The numerical model of alfa Stirling engine modification
Type
book chapter
Language
en
Original abstract
Achieving of good thermodynamical Stirling engine efficiency represents relatively difficult optimizing task. But attaining of maximal thermodynamical efficiency is not necessary, when we plan use the waste heat. The composition of enough accurate thermal model is important. We cannot neglect many energy losses. Only the theory of ideal cycles is not usable. Even the models dividing the volume of working gas into two or three sub-areas are not too accurate (Walker, 1973). The dividing of engine into many volume elements (the control volumes method) makes better results. But the accuracy of CFD calculations is not achieved by the model. However, this model is faster and more suitable for future optimization of engine parameters.
Czech abstract
Dosažení dobré účinnosti Stirlingova motoru představuje relativně složitou optimalizační úlohu. Dosažení maximální účinnosti však není nezbytné, pokud chceme využít odpadní teplo. Důležitý je dostatečně přesný tepelný model. Nemůžeme přitom zanedbat řadu ztrát. Modely dělící objem pracovního plynu na dva podoběmy nejsou dostatečně přesné. Rozdělení na více objemů (CVM) přináší lepší výsledky. Přesnosti CFD výpočtů však nemůže být tímto způsobem dosaženo. Model je však rychlejší a vhodnější pro optimaliyaci parametrů motoru.
English abstract
Achieving of good thermodynamical Stirling engine efficiency represents relatively difficult optimizing task. But attaining of maximal thermodynamical efficiency is not necessary, when we plan use the waste heat. The composition of enough accurate thermal model is important. We cannot neglect many energy losses. Only the theory of ideal cycles is not usable. Even the models dividing the volume of working gas into two or three sub-areas are not too accurate (Walker, 1973). The dividing of engine into many volume elements (the control volumes method) makes better results. But the accuracy of CFD calculations is not achieved by the model. However, this model is faster and more suitable for future optimization of engine parameters.
Keywords in English
combined heat and power unit, Stirling engine, model, simulation
RIV year
2006
Released
15.08.2006
Publisher
Brno University of Technology
Location
Brno
ISBN
978-80-214-3559-9
Book
Simulation modelling of mechatronic system III
Edition number
1
Pages from–to
219–227
Pages count
9
BIBTEX
@inbook{BUT55758,
author="Michal {Sikora} and Radek {Vlach},
title="The numerical model of alfa Stirling engine modification",
booktitle="Simulation modelling of mechatronic system III",
year="2006",
month="August",
pages="219--227",
publisher="Brno University of Technology",
address="Brno",
isbn="978-80-214-3559-9"
}