Micro Steam Turbines for Hybrid Power Source Vehicles

Year : 2024 | Volume :11 | Issue : 01 | Page : 9-17

C. Armenta -Déu

  1. Professor Facultad de Ciencias Físicas. Universidad Complutense de Madrid Madrid Spain


The paper describes a new hybrid power system for vehicles consisting in an Internal Combustion Engine (ICE) plus a micro steam turbine (MST) that supplies energy to an electric motor. The result of this hybridization is a reduction in fuel consumption and an improvement in performance efficiency. The micro steam turbine unit uses the released thermal energy from the ICE to generate water vapor flow, which is accelerated in a convergent nozzle to increase the kinetic energy, carrying the accelerated flow to the micro steam turbine. A simulation analysis shows that the hybrid engine increases the supplied power by 3.4% for a gasoline internal combustion engine vehicle, and by 4.1% for a diesel. Power gain ratio of a micro steam turbine set regarding lithium battery system is 2.0% for gasoline ICE and 1.8% for diesel. Regarding the cost, a MST unit is 3.2 times more expensive than a lithium battery if we compute initial investment; however, the normalized price over the lifespan is similar, 34.6 €/kWh·year for the battery power system, and 35.3 €/kWh·year for the micro steam turbine set.

Keywords: Internal Combustion Engine; Micro steam turbine; Vehicle Engine Hybridization; Thermal Energy Recovery; Improvement of the Coefficient of Performance

[This article belongs to Journal of Automobile Engineering and Applications(joaea)]

How to cite this article: C. Armenta -Déu. Micro Steam Turbines for Hybrid Power Source Vehicles. Journal of Automobile Engineering and Applications. 2024; 11(01):9-17.
How to cite this URL: C. Armenta -Déu. Micro Steam Turbines for Hybrid Power Source Vehicles. Journal of Automobile Engineering and Applications. 2024; 11(01):9-17. Available from: https://journals.stmjournals.com/joaea/article=2024/view=147944

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Regular Issue Subscription Original Research
Volume 11
Issue 01
Received March 25, 2024
Accepted March 30, 2024
Published May 27, 2024