Simulation Towards Demonstration: A Comparison Of Different Control Concepts Of An Industrial-Scale Rotation Heat Pump

Michael Lauermann, Stephan Kling, Bernd Windholz, Andreas Sporr, Andreas Längauer, Georg Kaltenbaek, Bernhard Adler

Research output: Chapter in Book or Conference ProceedingsConference Proceedings with Oral Presentationpeer-review


Rotation Heat Pumps (RHP) offer the advantage of a flexible process in terms of temperature with an environmentally friendly, non-flammable working fluid. The application has already proven successful in the operation of a reference plant and prototypes. A RHP uses a Joule cycle in contrast to compression heat pumps using a vapor compression cycle. Due to the rotation of a rotor filled with the working fluid, the temperature of the fluid rises outwards as the working fluid is compressed. Basic elements are the heat exchangers, the compression and expansion pipes, and a fan to circulate the working fluid. Due to the rotation, these components differ in their operating behavior according to available literature data.
Regarding control, numerous publications and theoretical principles and commercial controllers are available for compression heat pumps. The current state of the art for an RHP is a fixed/rigid presetting of the parameters to achieve a certain operating state. This results in a simple but non-optimal control, e.g. regarding energy efficiency. In this work, different control concepts based on the fundamentals of a DigitalTwin have been developed and compared to each other (e.g. extremum-seeking control and model predictive control). The proof-of-concept is first performed on the machine controller (PLC) by means of controller-in-the-loop tests. Subsequently, the control concepts are implemented and verified on a real industrial scale RHP.
Original languageEnglish
Title of host publicationProceedings of the 14th IEA Heat Pump Conference
Number of pages13
Publication statusPublished - 15 May 2023

Research Field

  • Efficiency in Industrial Processes and Systems


  • Energy
  • Rotation Heat Pump
  • Thermodynamics
  • Control
  • Sustainability
  • Exergy

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