Search for dissertations about: "polyurethane for insulation"
Showing result 1 - 5 of 13 swedish dissertations containing the words polyurethane for insulation.
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1. Insulation materials in district heating pipes : Environmental and thermal performance of polyethylene terephthalate and polyurethane foam
Abstract : District heating can contribute to increased energy efficiency in society. The environmental impact can be reduced by minimising the heat losses in the district heating pipes during distribution of the heat to the customers. READ MORE
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2. Assessment of novel applications for nano-porous thermal insulation in district heating pipes and building walls
Abstract : In nano-porous thermal insulation there is a strong relation between the pressure and the thermal conductivity, even at pressures close to atmospheric pressure. This thesis presents research on applications of nano-porous insulation in hybrid insulation district heating pipes and in building walls. READ MORE
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3. Blowing Agents in Rigid Polyurethane Foam - Analytical Studies - Technical and Environmental Aspects
Abstract : 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. READ MORE
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4. Environmental and Thermal Performance of District Heating Pipes
Abstract : In order to move towards a sustainable society we need to increase the efficiency of our use of available resources, not only in economic terms but also in ecological terms. District heating, the utilisation of centrally produced heat for space heating and domestic hot water generation, has the potential to contribute to the eco-efficient use of energy resources in the parts of the world where space heating is needed. READ MORE
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5. Predicting the Long-Term Insulation Performance of District Heating Pipes
Abstract : The aim of the studies that comprise this thesis was to predict the heat loss over timefrom a range of district heating pipes insulated with closed-cells foam. The thermalconductivity of the foam changes over time when it is not diffusion-tight encapsulatedagainst the environment, as diffusion alters the cell gas composition until it reachesequilibrium with the surrounding air. READ MORE