Sökning: "enclosure"

Visar resultat 11 - 15 av 71 avhandlingar innehållade ordet enclosure.

  1. 11. Advances in Thermal Insulation : Vacuum Insulation Panels and Thermal Efficiency to Reduce Energy Usage in Buildings

    Författare :Thomas Thorsell; Folke Björk; Mark Bomberg; Targo Kalamees; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Vacuum insulation panels; VIP; serpentine edge; thermal bridge; composite film; gas diffusion; defect dominated; holistic approach; building enclosure; integrated testing and modeling; energy equivalent; field performance; air flow; thermal insulation efficiency;

    Sammanfattning : We are coming to realize that there is an urgent need to reduce energy usage in buildings and it has to be done in a sustainable way. This thesis focuses on the performance of the building envelope; more precisely thermal performance of walls and super insulation material in the form of vacuum insulation. LÄS MER

  3. 12. The Full Multigrid Method Applied to Turbulent Flow in Ventilated Enclosures Using Structured and Unstructured Grids

    Författare :Peter Emvin; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; adaptivity; finite volume; local mesh refinement; finite element; k-omega large Eddy simulation; ventilated enclosure; k-epsilon; multigrid;

    Sammanfattning : Computational fluid dynamics require large computer resources and it is thus of paramount interest to have as efficient an algorithm as possible. This means that both an accurate discretization and a fast solver are required. In this work, we have used the full multigrid concept, which is a general and optimal solver. LÄS MER

  4. 13. Storskiftet i Ekebyborna : svensk jordbruksutveckling avspeglad i en östgötasocken

    Författare :Birgitta Olai; Uppsala universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; History; Historia;

    Sammanfattning : .... LÄS MER

  5. 14. Mötet mellan centralt och lokalt : Studier i uppländska byordningar

    Författare :Wolter Ehn; Institutet för språk och folkminnen; []
    Nyckelord :HUMANIORA; HUMANITIES; village by-laws; parish and village meeting; fences; grazing; open fields; enclosure and resources; authority; byordningar; Etnologi; Ethnology;

    Sammanfattning : The Swedish village by-laws are a collection of rules for coexistence in a village which evolved during the 18th and 19th centuries. The dissertation takes its starting point in an edition of Byordningar från Mälarlänen (Village By-Laws in the Lake Mälar districts) containing about 400 by-laws from the central part of Sweden, and is a limited review of that edition at the same time as it gives a systematic survey of certain aspects specified in the by-laws. LÄS MER

  7. 15. Non-selfadjoint operator functions

    Författare :Axel Torshage; Christian Engström; Marco Marletta; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Non-linear spectral problem; numerical range; pseudospectrum; resolvent estimate; equivalence after extension; block operator matrices; operator functions; operator pencil; spectral divisor; joint numerical range; Mathematics; matematik;

    Sammanfattning : Spectral properties of linear operators and operator functions can be used to analyze models in nature. When dispersion and damping are taken into account, the dependence of the spectral parameter is in general non-linear and the operators are not selfadjoint. LÄS MER