The increased interest in solar thermal systems using steam as a working medium either for power generation or process heat applications gave rise to a growing demand for latent heat storage units. Essential for the development of cost-effective latent heat storage systems is the achievement of a sufficient power level in spite of the characteristic low thermal diffusivities of latent heat storage materials. The sandwich concept using fins made either from graphite or aluminum has been identified as the most promising option for latent heat storage systems. The feasibility of this approach has been demonstrated by three prototypes using graphite and one prototype using aluminum fins. The prototype with aluminum fins was filled with sodium nitrate and was operated for more than 4000 h without degradation of power. The volume specific average power density is in the range , so it is proven that the major problem of phase change material (PCM) storage of low heat transfer rates has been overcome and high-temperature PCM storage with large capacity factor is possible.
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November 2009
Research Papers
Development of PCM Storage for Process Heat and Power Generation
Wolf-Dieter Steinmann,
Wolf-Dieter Steinmann
German Aerospace Center (DLR),
e-mail: wolf.steinmann@dlr.de
Institute of Technical Thermodynamics
, Pfaffenwaldring 38-40, 70569 Stuttgart, Germany
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Doerte Laing,
Doerte Laing
German Aerospace Center (DLR),
Institute of Technical Thermodynamics
, Pfaffenwaldring 38-40, 70569 Stuttgart, Germany
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Rainer Tamme
Rainer Tamme
German Aerospace Center (DLR),
Institute of Technical Thermodynamics
, Pfaffenwaldring 38-40, 70569 Stuttgart, Germany
Search for other works by this author on:
Wolf-Dieter Steinmann
German Aerospace Center (DLR),
Institute of Technical Thermodynamics
, Pfaffenwaldring 38-40, 70569 Stuttgart, Germanye-mail: wolf.steinmann@dlr.de
Doerte Laing
German Aerospace Center (DLR),
Institute of Technical Thermodynamics
, Pfaffenwaldring 38-40, 70569 Stuttgart, Germany
Rainer Tamme
German Aerospace Center (DLR),
Institute of Technical Thermodynamics
, Pfaffenwaldring 38-40, 70569 Stuttgart, GermanyJ. Sol. Energy Eng. Nov 2009, 131(4): 041009 (4 pages)
Published Online: September 22, 2009
Article history
Received:
December 22, 2008
Revised:
April 21, 2009
Published:
September 22, 2009
Citation
Steinmann, W., Laing, D., and Tamme, R. (September 22, 2009). "Development of PCM Storage for Process Heat and Power Generation." ASME. J. Sol. Energy Eng. November 2009; 131(4): 041009. https://doi.org/10.1115/1.3197834
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