| 1. |
- Alanne, K., et al.
(författare)
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Economic viability of energy-efficiency measures in educational buildings in Finland
- 2013
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Ingår i: Advances in Building Energy Research. - : Informa UK Limited. - 1751-2549 .- 1756-2201. ; 7:1, s. 120-127
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Tidskriftsartikel (refereegranskat)abstract
- The economic viability of novel energy-efficient design concepts has been evaluated in Finnish educational buildings. The total energy consumption of representative target buildings with each design concept has been found using the whole-building simulation tool IDA Indoor Climate and Energy 4.0, and the financial viability has been assessed using the discounted payback period method. Different thermal insulation and air tightness properties of the building envelope, and different ventilation's heat recovery efficiency assumptions and heat distribution options have been investigated. The results suggest that a prudent attitude should be taken toward the investments in ultra-low-energy designs. Total energy-saving potential of 25-32% can be obtained. The payback periods varied from 15 to more than 40 years. The results can be generalized in cold climates and techno-economic conditions similar to Finland.
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| 3. |
- Badura, Andre, et al.
(författare)
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Managing climate-change-induced overheating in non-residential buildings
- 2020
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Ingår i: 12th Nordic symposium on building physics (NSB 2020). - : EDP Sciences.
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Konferensbidrag (refereegranskat)abstract
- Large and rapid climatic changes can be uncomfortable and sometimes hazardous to humans. Buildings protect people from external climatic conditions, and also mitigate the impacts of external climate extremes through their design and construction, as well as with the help of dedicated building service and other technical systems. Active space conditioning accounts for more than 30 per cent of the overall final energy use in Germany. In the life cycle of a building, the construction phase (planning and construction) is the phase with the shortest duration. However, the quality applied during this phase has a significant impact on the resources required, as well as the overall building performance during the much longer operational phase. Once built, buildings are often unable to adapt to boundary conditions that were not considered in the original building design. Consequently, changing outdoor climate conditions can result in an uncomfortable indoor climate over the lifetime of a building. The aim of this study was to determine the effectiveness of flexible solutions for reducing winter heating loads and to reducing/avoiding summer cooling loads in nonresidential buildings in Germany. Various external shading scenarios for non-residential buildings were analysed using the IDA ICE indoor climate and energy simulation tool. Key simulation parameters included the orientation and location of the building, as well as the envelope structure. We investigated the impacts of solar shading on heat storage in the building mass and indoor climate and how different types of envelopes affect overall energy use. The result shows that the use of an adaptive building envelope allows a higher reduction of the total energy demand by 7 % to 15 % compared to an increase in insulation thickness only.
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| 4. |
- Badura, André, et al.
(författare)
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Managing overheating in buildings induced by climate change
- 2020
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Ingår i: IOP Conference Series. - : IOP Publishing Ltd. ; , s. 052016-
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Konferensbidrag (refereegranskat)abstract
- Extended periods of drought, heavy rainfall and rapid changes between high and low outdoor temperature extremes have all been associated with global climate change. It is highly likely that a significant portion of climate change is anthropogenic. Large and rapid climatic changes have the potential to generate significant discomfort and even hazard to occupants. Well designed, constructed and managed buildings protect people from adverse climatic conditions and provide indoor spaces that foster well-being, health and productivity. Changing climatic conditions require innovative approaches to the design, building, management and use of comfortable and safe indoor environments. This study explores innovative approaches to reducing/avoiding climate-change-induced overheating in residential buildings in Northern Europe (Sweden and Germany), with a focus on managing heat loads during the summer season. Different approaches and measures are discussed, with relevance to building retrofitting and new construction. It is shown that the need for active cooling can be significantly reduced through good building design and smart climate control. Innovative insolation management devices are further shown to have the potential to reduce both winter heating and summer cooling loads. The study also explores the extent to which the intensity of urban heat islands can be reduced by addressing heat storage in the building structure. Innovative approaches to solar shading and heat protection are discussed as alternatives to heat load and indoor climate management.
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| 8. |
- Bohdanowicz, Paulina, et al.
(författare)
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Determinants and benchmarking of resource consumption in hotels : case study of Hilton International and Scandic in Europe
- 2007
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Ingår i: Energy and Buildings. - : Elsevier BV. - 0378-7788 .- 1872-6178. ; 39:1, s. 82-95
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Tidskriftsartikel (refereegranskat)abstract
- This paper reports on a study of resource consumption in 184 Hilton International and Scandic hotels in Europe. An overview of the characteristics of these two brands (upscale and mid-market, respectively), as well as the collective resource consumption in these hotels is presented (2004 data). This is followed by a more detailed analysis of a number of physical and operational factors that may potentially influence the energy and water use in these hotels. A multiple variable regression analysis indicated that, in the absence of climate data, hotel standard, total hotel floor area, number of guest-nights sold and number of food covers sold all affect the energy and water use in these facilities. The survey results further document significant differences in the energy- and water-utilisation in Hilton and Scandic hotels. This indicates that establishing realistic resource consumption benchmarks or models requires classifying hotels (especially those belonging to the upscale brand) into sufficiently specialised sub-groups representing facilities with comparable properties. It is further suggested that benchmarking of facility components may be necessary. The paper concludes with some recommendations on the procedure and criteria for establishing a useful reporting system and benchmarking model.
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