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

Michiel Oom, Emanuel Feru, Bram de Jager, Henk Ouwerkerk, Rick de Lange

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

1 Citation (Scopus)
1 Downloads (Pure)


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
Number of pages6
ISBN (Print)9781538654286
Publication statusPublished - 9 Aug 2018
Event2018 American Control Conference (ACC 2018) - Hilton Milwaukee City Center Hotel, Milwaukee, Wisconsin, United States
Duration: 27 Jun 201829 Jun 2018


Conference2018 American Control Conference (ACC 2018)
Abbreviated titleACC 2018
Country/TerritoryUnited States
CityMilwaukee, Wisconsin
Internet address


Dive into the research topics of 'Improving the part-load performance of turbines in rankine cycle based automotive waste heat recovery systems'. Together they form a unique fingerprint.

Cite this