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Träfflista för sökning "hsv:(TEKNIK OCH TEKNOLOGIER) hsv:(Naturresursteknik) hsv:(Annan naturresursteknik) "

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Numrering	Referens	Omslagsbild	Hitta
1431.	Diener, Silvia, et al. (författare) Results from a field study using steel industry slags in a landfill cover construction 2008 Konferensbidrag (övrigt vetenskapligt/konstnärligt)
1432.	Dodoo, Ambrose, et al. (författare) Carbon implications of end-of-life management of building materials 2009 Ingår i: Resources, Conservation and Recycling. - : Elsevier BV. - 0921-3449 .- 1879-0658. ; 53:5, s. 276-286 Tidskriftsartikel (refereegranskat)abstract In this study we investigate the effects of post-use material management on the life cycle carbon balance of buildings, and compare the carbon balance of a concrete-frame building to that of a wood-frame building. The demolished concrete is either landfilled, or is crushed into aggregate followed by exposure to air for periods ranging from 4 months to 30 years to increase carbonation uptake of CO2. The demolished wood is assumed to be used for energy to replace fossil fuels. We calculate the carbon flows associated with fossil fuel used for material production, calcination emission from cement manufacture, carbonation of concrete during and after its service life, substitution of fossil fuels by recovered wood residues, recycling of steel, and fossil fuel used for post-use material management. We find that carbonation of crushed concrete results in significant uptake of CO2. However, the CO2 emission from fossil fuel used to crush the concrete significantly reduces the carbon benefits obtained from the increased carbonation due to crushing. Stockpiling crushed concrete for a longer time will increase the carbonation uptake, but may not be practical due to space constraints. Overall, the effect of carbonation of post-use concrete is small. The post-use energy recovery of wood and the recycling of reinforcing steel both give higher carbon benefit than the post-use carbonation. We conclude that carbonation of concrete in the post-use phase does not affect the validity of earlier studies reporting that wood-frame buildings have substantially lower carbon emission than concrete-frame buildings.
1433.	Dodoo, Ambrose, et al. (författare) Energy implications of end-of-life options for building materials 2008 Ingår i: First International Conference on Building Energy and Environment, Proceedings Vols 1-3. - Dalian, China : Dalian University Technology Press. - 9780981688169 ; , s. 2025-2032 Konferensbidrag (refereegranskat)abstract The energy flows associated with the materials comprising a building can be a significant part of the total energy used in a building's life cycle. Buildings have finite life spans, and the materials from demolished buildings can be either a burden that must be disposed, or a resource that can be used. In this paper we analyse the end-of-life energy impacts of concrete, steel and wood. End-of-life options considered include reuse; recycling; downcycling; energy recovery; and disposal in landfill. We follow the life cycles of the building materials from the acquisition of natural resources through to the end of the product's life cycle. We identify possibilities and constraints for integrating more effective end-of-life material processing options into existing industrial systems.
1434.	Dodoo, Ambrose, 1979-, et al. (författare) Impacts of end-use energy efficiency measures on life cycle primary energy use in an existing Swedish multi-story apartment building 2011 Ingår i: World Renewable Energy Congress 2011, Linköping, Sweden, May 8-11. - : Linköping University Electronic Press. Konferensbidrag (refereegranskat)
1435.	Dodoo, Ambrose, et al. (författare) Life cycle primary energy implication of retrofitting a wood-framed apartment building to passive house standard 2010 Ingår i: Resources, Conservation and Recycling. - : Elsevier. - 0921-3449 .- 1879-0658. ; 54:12, s. 1152-1160 Tidskriftsartikel (refereegranskat)abstract Here we analyze the life cycle primary energy implication of retrofitting a four-storey wood-frame apartment building to the energy use of a passive house. The initial building has an annual final energy use of 110 kWh/m(2) for space and tap water heating. We model improved thermal envelope insulation, ventilation heat recovery, and efficient hot water taps. We follow the building life cycle to analyze the primary energy reduction achieved by the retrofitting, considering different energy supply systems. Significantly greater life cycle primary energy reduction is achieved when an electric resistance heated building is retrofitted than when a district heated building is retrofitted. The primary energy use for material production increases when the operating energy is reduced but this increase is more than offset by greater primary energy reduction during the operation phase of the building, resulting in significant life cycle primary energy savings. Still, the type of heat supply system has greater impact on primary energy use than the final heat reduction measures.
1436.	Dodoo, Ambrose, 1979-, et al. (författare) Life-cycle primary energy implication of the new Swedish Building Code. : ECEEE Summer study. La Colle Sur Loupe, Côte d’Azur, France, June 1-6. 2009 Konferensbidrag (refereegranskat)
1437.	Dodoo, Ambrose, 1979-, et al. (författare) Life cycle primary energy perspective on retrofitting an existing building to passive house standard 2010 Ingår i: SB10, Sustainable Community, Espoo, Finland, September 22-24, 2010. Konferensbidrag (refereegranskat)
1438.	Dodoo, Ambrose, 1979-, et al. (författare) Life cycle primary energy use of an apartment building designed to the current Swedish building code or passive house standard 2010 Ingår i: Passivhus Norden. Aalborg, Denmark, October 7- 8, 2010. Konferensbidrag (refereegranskat)
1439.	Dodoo, Ambrose, 1979-, et al. (författare) Potential for reducing primary energy use in an existing Swedish apartment building : Passivhus Norden. Göteborg, Sweden, April 27-29 2009 Konferensbidrag (övrigt vetenskapligt/konstnärligt)
1440.	Dodoo, Ambrose, 1979-, et al. (författare) Potential for reducing primary energy use in an existing Swedish apartment building. : Passivhus Norden. Göteborg, Sweden, April 27-29. 2009 Konferensbidrag (övrigt vetenskapligt/konstnärligt)

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