Sökning: "air leakage"

Visar resultat 1 - 5 av 54 avhandlingar innehållade orden air leakage.

  1. 1. Air and Water Tightness in Building Envelopes - Evaluation of Methods for Quality Assurance

    Författare :Fredrik Gränne; KTH; []
    Nyckelord :Roofing; roof membrane; durability; waterproofing; leakage; wind-load; non-destructive testing; NDT; BSL4; BLS3; air leakage; building envelope;

    Sammanfattning : The purpose of this work is to contribute to a process formaking buildings with good function and to avoid prematurefaults.The design, construction and installation of low-slopedroofs are important parts of creating a durable building. LÄS MER

  3. 2. Studies on Building Air Leakage -a transient pressurisation method, measurements and modelling

    Författare :Björn Mattsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; air change rate; Airtightness; CFD-simulations; moisture transport; air leakage; mould growth; cold attics; transient pressurisation;

    Sammanfattning : Airtightness of the building envelope is a key factor for good performance of a building. The main part of this thesis deals with the exploration of a transient pressurisation method for air leakage measurements.In the transient method, an enclosure is pressurised to a desired pressure. The air flow into the enclosure is then stopped. LÄS MER

  4. 3. Probabilistic Modelling of Air Infiltration and Heat Loss in Low-Rise Buildings

    Författare :Krystyna Pietrzyk; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ventilation; heat loss; reliability; leakage; air infiltration; risk analysis; thermal transmittance; probabilistic model; wind; building physics;

    Sammanfattning : A probabilistic model (PROMO) of air exchange and heat loss in a low-rise building with a lightweight construction is proposed. The probability distributions of the air change rate and of the heat loss are the main outputs of the model. LÄS MER

  5. 4. Vertical Display Cabinets in Supermarkets - Energy Efficiency and the Influence of Air Flows

    Författare :Monica Axell; RISE; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; display cabinet; model; simulation; supermarket; CFD; air curtain; energy; performance; air distribution; display case; infiltration;

    Sammanfattning : This thesis concerns investigations of the performance of vertical refrigerated display cabinets. Such cabinets are in widespread use and account for a considerable proportion of the energy used in shops. The open front is important for the shop-owner, who wants the chilled items in the cabinet to be well exposed and easily accessible. LÄS MER

  7. 5. Safety and biological aspects of present techniques of haemodialysis

    Författare :Per Jonsson; Hans Dietrich Polaschegg; Umeå universitet; []
    Nyckelord :haemodialysis; safety; leakage current; central dialysis catheter; microbubbles; microemboli; air contamination; transfusion medicine; transfusionsmedicin;

    Sammanfattning : Introduction: Haemodialysis (HD) is a treatment in which blood from the patient is lead through a tubing system into a dialysis device in a extracorporeal circuit. This circuit contains semipermeable membranes (dialyzer). Blood with uraemic toxins flows on one side, and a salt solution flows on the other side. LÄS MER