Course paper / final thesis

Development of a control system for the high temperature cooling circuit

Starting date


Duration of contract

6 months

Type of employment

Full-time (part-time possible)

"Cutting-edge research requires excellent minds – particularly more females – at all levels. Launch your mission with us and send in your application now!" Prof. Pascale Ehrenfreund - Chair of the DLR Executive Board

Your mission:

Project Background

The INN-BALANCE project is on development and demonstration of an automotive fuel cell system. INN-BALANCE’s ambition is to boost hydrogen mobility by developing a new generation of highly-efficient fuel cell Balance of Plant (BoP) components. These components will add up to an innovative fuel cell system and hence greatly improve the efficiency and the reliability of fuel cell powered vehicles, while reducing their cost. INN-BALANCE integrates the latest trends in fuel cell vehicle technology into the development of:

  • A new air turbo-compressor
  • Combined hydrogen injection and recirculation
  • Advanced control and diagnosis devices
  • A new concept of thermal management

Scope of Work

The thermal management of the fuel cell stack, the cathode air compressor and the cathode air intercooler is a crucial task in an automotive fuel cell system. The stack has to be operated in a narrow temperature range due its sensibility in terms of water balance and cell lifetime. The physical layout of the thermal management system has been developed with respect to different temperature levels of the stack and electronic devices. As a result, the thermal management consists of two independent cooling circuits with distinct temperature levels. Each circuit is driven by a separate speed-controlled cooling liquid pump and a controlled bypass valve for the radiators. The control system has to maintain the designated cooling liquid inlet and outlet temperatures of the stack and the electronic devices even with high dynamic load cycles and fluctuating environment conditions. The aim of the work is to develop and implement a model based advanced control strategy for the high temperature cooling loop. In detail, the tasks should be accomplished:

  • Implementation and testing of a simplified SISO control of the high temperature cooling circuit as benchmark. The prototype control unit will be based in Simulink™ and Simulink Desktop Realtime™
  • Development of a model based control system for the high temperature cooling circuit.
  • Test and optimization of the control systems with the laboratory test rack
  • Evaluation of performances improvements (e. g. response times, energy optimization etc)
  • Documentation of the work

Your qualifications:

  • master study in Engineering (process systems engineering or related)
  • good knowledge in Thermodynamics and Control theory
  • experience with Matlab Simulink
  • fluency in written and spoken English is required

Your benefits:

Look forward to a fulfilling job with an employer who appreciates your commitment and supports your personal and professional development. Our unique infrastructure offers you a working environment in which you have unparalled scope to develop your creative ideas and accomplish your professional objectives. Our human resources policy places great value on a healthy family and work-life-balance as well as equal opportunities for persons of all genders (m/f/non-binary). Individuals with disabilities will be given preferential consideration in the event their qualifications are equivalent to those of other candidates.

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Technical contact

Juan Sánchez Monreal
Phone: +49 711 68628-639

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Jörg Weiss-Ungethüm
Phone: +49 711 6862-530

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Vacancy 37771

HR department Stuttgart

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DLR site Stuttgart

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DLR Institute of Engineering Thermodynamics

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