Sökning: "lifetime"

Visar resultat 1 - 5 av 826 avhandlingar innehållade ordet lifetime.

  1. 1. Lifetime modeling and management of transformers

    Författare :Johanna Rosenlind; Rajeev Thottappillill; Zhong Dong Wang; KTH; []
    Nyckelord :transformers; lifetime modeling; asset management; thermal modeling; lifetime estimation;

    Sammanfattning : This work have studied and developed lifetime estimation methods for the power transformer and how these could be used for asset management purposes. It is researchperformed in the intersection of the fields of reliability theory, statistical analysis, and stochastic process theory applied to lifetime estimations and management of transformers. LÄS MER

  2. 2. Lifetime Performance Assessment of Thermal Systems : Studies on Building, Solar and Disctrict Heating Applications

    Författare :Bojan Stojanovic; Christer Sjöström; Per Jostein Hovde; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Lifetime performance; degradation; assessment; modelling; field exposure; thermal components and system; Building engineering; Byggnadsteknik; Materials science; Teknisk materialvetenskap; lifetime performance; thermal components and systems;

    Sammanfattning : The main questions today concerning thermal systems are their economical and environmental impacts. These entities are generally, at present, assessed on the basis of operation performances of newly installed/designed systems, during an assumed lifetime period. LÄS MER

  3. 3. An eyesafe, long lifetime, stimulated Raman scattering laser

    Författare :Stellan Wickström; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; absorber; eyesafety; deposits; laser; Raman scattering; lifetime;

    Sammanfattning : .... LÄS MER

  4. 4. Condition measuring and lifetime modelling of electrical power transmission equipment

    Författare :Per Westerlund; Patrik Hilber; Tommie Lindquist; Carl-Ejnar Sölver; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; disconnectors; circuit breakers; reliability; lifetime; electric contacts; electric power transmission; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : The electric grid is important in modern society, so the outages should be few. The transmission grid should have a real high availability, since it transports electrical energy across the country. Then, it is difficult to plan outages for maintenance and installation. LÄS MER

  5. 5. Lifetime assessment of complex industrial systems - A framework for renewal strategies

    Författare :Mathias Strömberg; KTH; []
    Nyckelord :Lifetime assessments; residual lifetime; renewal strategies;

    Sammanfattning : For technical systems in the electricity and paper and pulpindustries, asset management is emerging as a new approachaddressing how to exploit physical assets with long operativelives in the most profitably way. An important problem forasset management staff is knowing when to carry out areplacement or renewal. LÄS MER