Sökning: "rigid pipes"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden rigid pipes.

  1. 1. Earth pressure distribution against rigid pipes under various bedding conditions : full-scale field tests in sand

    Författare :Sven Liedberg; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; earth pressure cell field tests; non-cohesive soils; numerical simulation; stress-strain; soil mechanics; rigid pipes; earth pressure;

    Sammanfattning : .... LÄS MER

  3. 2. Assessment of the lifetime of district heating pipes

    Författare :Alberto Vega; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; FTIR; rigid polyurethane foam; artificial ageing; {District heating pipes; natural ageing; degradation mechanisms; mechanical performance;

    Sammanfattning : This thesis is concerned with the degradation and assessment of the lifetime of district heating pipes, where accelerated ageing is used to study the degradation in a short time frame. The project was divided into four interrelated parts. LÄS MER

  4. 3. Blowing Agents in Rigid Polyurethane Foam - Analytical Studies - Technical and Environmental Aspects

    Författare :Magdalena Svanström; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; insulation; ageing; district heating pipes; cyclopentane; CFC-11; carbon dioxide; diffusion; blowing agents; polyurethane foam;

    Sammanfattning : Rigid polyurethane foam is used in many different applications because of its high insulating capacity. CFC-11 has been the predominant blowing agent due to its advantageous properties, especially its low thermal conductivity. LÄS MER

  5. 4. Degradation mechanisms and long-term performance of PUR insulation in district heating pipes

    Författare :Alberto Vega; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; mechanical performance; thermal conductivity; District heating pipe; degradation mechanisms; long-term performance; rigid polyurethane foam;

    Sammanfattning : District heating networks are used worldwide, especially in Scandinavian countries and also in many other countries, e.g. Germany, Russia, United States, South Korea and China. From an environmental point of view, district heating networks are a good alternative to more traditional building heating systems. LÄS MER

  7. 5. HFC-365mfc and cyclopentane as blowing agents in polyurethane insulation of distric heating pipes

    Författare :Sara Mangs; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; 1; 3-pentaflurorbutane; cyclopentane; diffusion; thermal performance; 1; rigid polyurethane foam; twin pipe; 3; HFC-365mfc; 1; district heating;

    Sammanfattning : .... LÄS MER