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Latent heat storage element comprises housing that is closed in a fluid tight manner and includes tubular conduit for temperature medium, metallic open-pore structure in space within housing and tubular conduit, and phase change medium
 
: Meinert, Jens; Andersen, Olaf; Lindenberg, G.; Fieback, K.; Enders, T.; Schubert, V.

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Frontpage ()

DE 102012005359 A1: 20120313
German
Patent, Electronic Publication
Fraunhofer IFAM, Institutsteil Pulvermetallurgie und Verbundwerkstoffe Dresden ()

Abstract
Heat storage element comprises a housing (1) that is closed in a fluid tight manner and comprises a tubular conduit (2) for a temperature medium, a metallic open-pore structure (3) arranged in a space within the housing and the tubular conduit, and a phase change medium incorporated in cavities of the open-pore structure. The open-pore structure is formed of sintered metallic fibers with each other, and the metallic fibers are firmly and/or positively connected to an inside wall of the housing and/or an outer surface of the tubular conduit. The heat storage element comprises a housing (1) that is closed in a fluid tight manner and comprises a tubular conduit (2) for a temperature medium, a metallic open-pore structure (3) arranged in a space within the housing and the tubular conduit, and a phase change medium incorporated in cavities of the open-pore structure. The open-pore structure is formed of sintered metallic fibers with each other, and the metallic fibers are firmly and/or positively connected to an inside wall of the housing and/or an outer surface of the tubular conduit. The fibers are aligned parallel to each other and vertical to a surface of the inside wall of the housing and/or to the outer surface of the tubular conduit so that an anisotropic heat conductivity characteristics is reached within the open-pore structure. The positive connection is formed by soldering and/or sintering. The open-pore structure is formed from disc shaped elements (3.1) arranged in series or stacked one above the other. The disc shaped elements with divergent porosity, which is formed with the metallic fibers of different dimension and/or different metals, are introduced into the housing. The open-pore structure and/or the disc shaped element is received within the housing so that pressing forces act between the metallic fibers and the inside wall of the housing and/or the outer wall of the tubular conduit. The metallic fibers are aligned, on the basis of the middle longitudinal axis of the tubular conduit to the inside wall of the housing, in the direction pointing radially outwards.

: http://publica.fraunhofer.de/documents/N-270972.html