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Advanced Measurement and Simulation Procedure for the Identification of Heat and Mass Transfer Parameters in Dynamic Adsorption Experiments

Author

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  • Andreas Velte

    (Department Heating and Cooling Technologies, Fraunhofer Institute for Solar Energy Systems ISE, Heidenhofstr. 2, 79110 Freiburg, Germany)

  • Gerrit Füldner

    (Department Heating and Cooling Technologies, Fraunhofer Institute for Solar Energy Systems ISE, Heidenhofstr. 2, 79110 Freiburg, Germany)

  • Eric Laurenz

    (Department Heating and Cooling Technologies, Fraunhofer Institute for Solar Energy Systems ISE, Heidenhofstr. 2, 79110 Freiburg, Germany)

  • Lena Schnabel

    (Department Heating and Cooling Technologies, Fraunhofer Institute for Solar Energy Systems ISE, Heidenhofstr. 2, 79110 Freiburg, Germany)

Abstract

Thermally-driven heat pumps can help to mitigate CO 2 emissions by enhancing the efficiency of heating systems or by driving cooling systems with waste or solar heat. In order to make the thermally-driven systems more attractive for the end consumer, these systems need a higher power density. A higher power density can be achieved by intensifying the heat and mass transfer processes within the adsorption heat exchanger. For the optimization of this key component, a numerical model of the non-isothermal adsorption dynamics can be applied. The calibration of such a model can be difficult, since heat and mass transfer processes are strongly coupled. We present a measurement and simulation procedure that makes it possible to calibrate the heat transfer part of the numerical model separately from the mass transfer part. Furthermore, it is possible to identify the parts of the model that need to be improved. For this purpose, a modification of the well-known large temperature jump method is developed. The newly-introduced measurements are conducted under an inert N 2 atmosphere, and the surface temperature of the sample is measured with an infrared sensor. We show that the procedure is applicable for two completely different types of samples: a loose grains configuration and a fibrous structure that is directly crystallized.

Suggested Citation

  • Andreas Velte & Gerrit Füldner & Eric Laurenz & Lena Schnabel, 2017. "Advanced Measurement and Simulation Procedure for the Identification of Heat and Mass Transfer Parameters in Dynamic Adsorption Experiments," Energies, MDPI, vol. 10(8), pages 1-25, August.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:8:p:1130-:d:106774
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    References listed on IDEAS

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    1. Santamaria, Salvatore & Sapienza, Alessio & Frazzica, Andrea & Freni, Angelo & Girnik, Ilya S. & Aristov, Yuri I., 2014. "Water adsorption dynamics on representative pieces of real adsorbers for adsorptive chillers," Applied Energy, Elsevier, vol. 134(C), pages 11-19.
    2. Aristov, Yuriy I. & Glaznev, Ivan S. & Girnik, Ilya S., 2012. "Optimization of adsorption dynamics in adsorptive chillers: Loose grains configuration," Energy, Elsevier, vol. 46(1), pages 484-492.
    3. Ursula Wittstadt & Gerrit Füldner & Olaf Andersen & Ralph Herrmann & Ferdinand Schmidt, 2015. "A New Adsorbent Composite Material Based on Metal Fiber Technology and Its Application in Adsorption Heat Exchangers," Energies, MDPI, vol. 8(8), pages 1-16, August.
    4. Sapienza, Alessio & Velte, Andreas & Girnik, Ilya & Frazzica, Andrea & Füldner, Gerrit & Schnabel, Lena & Aristov, Yuri, 2017. "“Water - Silica Siogel” working pair for adsorption chillers: Adsorption equilibrium and dynamics," Renewable Energy, Elsevier, vol. 110(C), pages 40-46.
    5. Girnik, Ilya S. & Aristov, Yuri I., 2016. "Dynamics of water vapour adsorption by a monolayer of loose AQSOA™-FAM-Z02 grains: Indication of inseparably coupled heat and mass transfer," Energy, Elsevier, vol. 114(C), pages 767-773.
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    Cited by:

    1. Andreas Velte & Jörg Weise & Eric Laurenz & Joachim Baumeister & Gerrit Füldner, 2021. "Zeolite NaY-Copper Composites Produced by Sintering Processes for Adsorption Heat Transformation—Technology, Structure and Performance," Energies, MDPI, vol. 14(7), pages 1-24, April.
    2. Valentin Schwamberger & Aditya Desai & Ferdinand P. Schmidt, 2019. "Novel Adsorption Cycle for High-Efficiency Adsorption Heat Pumps and Chillers: Modeling and Simulation Results," Energies, MDPI, vol. 13(1), pages 1-23, December.
    3. Eric Laurenz & Gerrit Füldner & Lena Schnabel & Gerhard Schmitz, 2020. "A Novel Approach for the Determination of Sorption Equilibria and Sorption Enthalpy Used for MOF Aluminium Fumarate with Water," Energies, MDPI, vol. 13(11), pages 1-10, June.
    4. Piotr Boruta & Tomasz Bujok & Łukasz Mika & Karol Sztekler, 2021. "Adsorbents, Working Pairs and Coated Beds for Natural Refrigerants in Adsorption Chillers—State of the Art," Energies, MDPI, vol. 14(15), pages 1-41, August.

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