Article | REF: BE8068 V1

HEAT ENGINES – GAS AND VAPOUR TURBINES, DIESEL AND SPARK-IGNITION ENGINES

Author: André LALLEMAND

Publication date: March 10, 2020

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ABSTRACT

The thermodynamic behaviour of power systems based on combustion, is discussed in the paper. Chemical and energy aspects of a combustion process are first presented. Gas turbines and turbojets thermodynamic cycles are analysed by considering either a heat supply, or a combustion in a chamber. An exergy analysis is also performed. After this presentation of the continuous flow devices, reciprocating engines (Diesel and spark-ignition engines) are described and modelled in the two cases of a heat supply or a combustion. Steam power plant modelling is then presented and some examples are given. Combined-cycle and cogeneration power-plants design and operation are also discussed.

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AUTHOR

  • André LALLEMAND: INSA engineer - Doctor of Physical Sciences - Former university professor - Former Director of the Energy Engineering Department at INSA, Lyon

 INTRODUCTION

This article follows on from [BE 8 064] , which deals with energy converters in general, and [BE 8 066] , which deals more specifically with thermomechanical generators (refrigeration machines and heat pumps). It covers applications involving heat engines of all types: DC or AC motors, gas or steam engines. Parts of this article may draw on concepts presented in the two articles mentioned above.

Virtually all engines run on energy supplied by fuels. For this reason, the first part of this article is devoted to a brief, but sufficient for the rest of the article, introduction to the basics of combustion.

The machines concerned are gas or combustion turbines, turbojet engines, diesel engines, spark-ignition engines and steam turbines associated with a steam production plant. However, as the aim of the article is not to provide technical information on these machines, only the principles of their operation and the associated thermodynamic cycles are detailed.

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KEYWORDS

combustion   |   calorific value   |   exergy   |   combined cycles   |   cogeneration


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