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Stratification analysis in packed bed thermal energy storage systems

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Issue date
2013
Author
Oró Prim, Eduard
Castell, Albert
Chiu, Justin
Martin, Viktoria
Cabeza, Luisa F.
Suggested citation
Oró Prim, Eduard; Castell, Albert; Chiu, Justin; Martin, Viktoria; Cabeza, Luisa F.; . (2013) . Stratification analysis in packed bed thermal energy storage systems. Applied Energy, 2013, núm. 109, p. 476–487. https://doi.org/10.1016/j.apenergy.2012.12.082.
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Abstract
District cooling and heating networks are increasing in many countries, especially in the Scandinavian countries. Some of the systems have become small for the needs of the population and they have to be enhanced in order to reach the cooling or heating necessities. Here, thermal energy storage system of a district cooling network is studied. Phase change material (PCM) is used in order to enhance the energy density and the stratification of the water tank. The experimental set up consists mainly of a cylindrical storage tank with a capacity of 3.73 L filled with spherically encapsulated PCM. The PCM used is PK6 from Rubitherm GmbH with a storage capacity of 175 kJ/kg between 2 C and 13 C. Many methods to characterize water tank stratification, such as graphical (dimensional and non-dimensional) and numerical figures based on temperature distribution (degree of stratification, first law efficiencies, second law efficiencies, other efficiencies as MIX number), are used to analysed and characterized two storage tanks, one of them with the inclusion of PCM packed bed during both charging and discharging processes.
URI
http://hdl.handle.net/10459.1/47826
DOI
https://doi.org/10.1016/j.apenergy.2012.12.082
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Applied Energy, 2013, núm. 109, p. 476–487
European research projects
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