Course paper / final thesis, Internship

Thermal cycling of solar absorber coatings under concentrated solar flux

Starting date

1 October 2018

Duration of contract

6 months

Type of employment


"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:

New high temperature solar absorber coatings are being developed within the European project RAISELIFE. These coatings are designed with a high solar absorptance in order to improve the efficiency of steam and molten salt tower receivers. A set of steel substrates and coatings have to be tested under realistic conditions to understand their failure mechanisms and prove their durability. A parabolic dish testing facility has been upgraded at the Plataforma Solar de Almería in order to perform thermal cycles on tubular absorber samples under concentrated solar flux profiles. The focus of the work lies on performing such accelerated aging test campaign, generate experimental data and improve test procedures.

Description of tasks

  • perform thermal cycles at the dish testing facility on coated samples
  • optical analysis of coated samples
    • measure solar absorptance and thermal emittance
    • image the observed degradation using optical microscopy
  • improve the dish test bench between measurement campaigns
    • infrared temperature measurement and control
    • flux density measurement and control
  • collect and analyze experimental data
    • evolution of solar absorptance and thermal emittance over cycles
    • comparison of degradation with climate chamber tests

Your qualifications:

  • Mechanical Engineering, Materials Science, Physics
  • good programming skills (Matlab, Labview)
  • basic knowledge in optics and image processing
  • ability to work independently and in a team
  • strong interest for experimental work
  • good communication skills in English, German and/or Spanish

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 puts great value on a healthy work-life balance as well as equal opportunities for men and women. 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

Simon Caron
Institute of Solar Research

Phone: +34 950 278-863

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Vacancy 23247

HR department Cologne

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DLR Institute of Solar Research

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