Improving the part-load performance of turbines in rankine cycle based automotive waste heat recovery systems

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Abstract

This paper presents two control strategies that improve the part-load performance of turbine-generators in Rankine cycle based automotive waste heat recovery systems. The first strategy concerns regulation of the turbine rotational speed by applying a varying current to the generator. A static feedforward controller is derived and experimentally demonstrated. Simulations indicate this controller to be over 99% optimal in terms of electric energy production. A comparison with tracking of the optimal turbine speed shows the implemented controller to be favorable. The second strategy concerns the admission of steam into the turbine by periodically opening and closing an on/off valve. By using this technique, the pressure ratio over the turbine is increased in a cost effective manner. On an experiment with a low heat input, the electric energy production increased by 18% due to the pulsating flow.

Original languageEnglish
Title of host publication2018 Annual American Control Conference, ACC 2018
PublisherInstitute of Electrical and Electronics Engineers
Pages4906-4911
Number of pages6
ISBN (Print)9781538654286
DOIs
Publication statusPublished - 9 Aug 2018
Event2018 Annual American Control Conference, (ACC2018) - Milwauke, United States
Duration: 27 Jun 201829 Jun 2018
http://acc2018.a2c2.org/
http://acc2018.a2c2.org/

Conference

Conference2018 Annual American Control Conference, (ACC2018)
Abbreviated titleACC2018
CountryUnited States
CityMilwauke
Period27/06/1829/06/18
Internet address

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  • Cite this

    Oom, M., Feru, E., de Jager, B., Ouwerkerk, H., & de Lange, R. (2018). Improving the part-load performance of turbines in rankine cycle based automotive waste heat recovery systems. In 2018 Annual American Control Conference, ACC 2018 (pp. 4906-4911). Institute of Electrical and Electronics Engineers. https://doi.org/10.23919/ACC.2018.8431888