| 1. |
- Akander, Jan, et al.
(författare)
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Simulated Long-term Thermal Performance of a Building That Utilizes a Heat Pump System and Borehole
- 2008
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Ingår i: Durability of Building Materials & Components 11. - Istanbul, Turkey : Istanbul Technical University. - 9789755613253 - 9789755613291
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Konferensbidrag (refereegranskat)abstract
- Over the last decades, installation and use of heat pumps has grown rapidly in Sweden, to the extent that these mainly or partly heat roughly 25 % of the heated floor space in single-family houses. A majority are ground coupled where the heat exchanger is a borehole of 60-220 m depth. As the heat pump system operates, heat extraction will in time reduce borehole temperatures, rendering lowered efficiency of the heat pump system thus directly affecting its economical and environmental aspects. Within the building sector, durability and life performance dynamics of energy systems is often not reflected upon. System performance and efficiency is assumed to be static over time, changing only due to different operation scenarios. This paper serves to quantify the long-term thermal performance degradation of a component, in this case the borehole, and how the degradation of this component affects performance-over-time of an entire system, in this case the heating system of the building. A dynamic thermal simulation model is used to assess the long-term thermal performance of the borehole. The building, which the heat pump serves, is assumed to be a typical Swedish house with normal energy consumption. Simulation results show that the depth of the borehole is of great importance to limit over-time temperature drops. The efficiency of the heat pump system is directly dependent of temperatures in the borehole. How the overall system performance is affected by component performance degradation, is highlighted.
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| 2. |
- Chevalier, Jean-Luc, et al.
(författare)
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Smart-ECO - Developing a Construction Sector Vision and Related Requirements for Sustainable Eco-buildings
- 2008
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Ingår i: Durability of Building Materials & Components 11. - Istanbul : Istanbul Technical University. - 9789755613253 - 9789755613291 ; , s. 1671-1677
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Konferensbidrag (refereegranskat)abstract
- The EU project Smart-ECO brings together experienced organizations spanning the full range of stakeholders covering the area of sustainable building. These include universities, R&D organizations, companies developing, supplying and using innovative technologies, consultants, users, government and policy makers. Smart-ECO uses this core partnership together with a wider stakeholder group community to focus on global issues of sustainable building to identify and evaluate priorities for current and future RTD activities. Activities and policies are due to be mapped to identify gaps and to focus future efforts. Innovative technologies, as well as improvements of the construction process, and their introduction into the building sector will be considered in relation to sustainable development, life performance, ambient intelligence, and other relevant stakeholder concerns.The project focuses on routes and means to enable the uptake of efficient technological and non-technological innovation that in turn enable the building and construction sector to meet the requirement for sustainable building. The current situation and the vision of a more sustainable built environment sets the frame for the appreciation of the long term effectiveness of Eco-buildings and innovative technologies, especially renewable energy systems. Together, the vision and relevant EC policies will serve as a reference framework for the analysis of life performance aspects of innovative technologies applied to realise more energy efficient and more sustainable buildings.This paper presents and discusses the process of establishing a reliable vision for sustainable buildings and related performance requirements.
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| 3. |
- Hallberg, Daniel, et al.
(författare)
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Life Cycle Management System : a planning tool supporting Long-term based design and maintenance planning
- 2008
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Ingår i: Durability of Building Materials & Components 11. - Istanbul : Istanbul Technical University. - 9789755613253 - 9789755613291 ; , s. 1871-1878
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Konferensbidrag (refereegranskat)abstract
- Construction projects include large amounts of information that has to be communicated to a number of actors, such as authorities, companies, clients and end users. Information exchange is complex, involving various players on different levels and phases of the construction process. For private clients, who generally have little experience and knowledge of this process, the on-going “Bygga Villa”-project has developed a web-portal, which offers them relevant information about the process and a number of services to facilitate realisation of their projects. One of the services provides a tool for supporting long-term strategy planning. The tool is based on the Life cycle Management System (LMS) that is a predictive and generic life cycle-based management system, aimed to support decision-making and planning of optimal design and maintenance of any construction works. The LMS-Bygga Villa tool estimates service life and maintenance intervals of different building parts and systems based on environmental-dependent degradation models. Simulated scenarios can give optimised solutions by applying life cycle cost analysis. This paper presents two case studies within LMS-Bygga Villa. The first case focuses on service life performance analysis of exterior parts of buildings. The second focuses on service life performance analysis of energy systems; here specifically a borehole assisted heat pump system used for heating a Swedish single-family residence.
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| 4. |
- Sjöström, Christer, et al.
(författare)
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International Standards on Durability and Sustainability of Construction works
- 2008
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Ingår i: 11DBMC International Conference on Durability of Building Materials and Components. - 9789755613291 ; , s. 1585-1592
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Konferensbidrag (refereegranskat)abstract
- The European Directive on Construction Products (CPD) establishes a set of essential requirements on construction products to be fulfilled throughout the "working life" of the construction works. The demands expressed in the directive is one significant driver, international attention another. Both CEN through a "task force on durability" and ISO through TC59/SC14 "Design Life" are addressing the subject. The work of ISO has led to the establishment of a suite of procedural standards on service life planning, including service life declaration and service life assessment methodologies, useful to be applied in the declaration and the application of service life information. The political agendas related to sustainable development and the understanding that building and construction is a key industrial sector to implement sustainability principles have led to the establishment of ISO TC59/SC17 "Sustainability in building construction". Being the first ISO subcommittee expressly dealing with sustainability in relation to an industrial sector, the work focuses on economic, environmental and social aspects of sustainability relative to buildings and construction works. Together with the established standards on service life and the concept of performance-based building, all the three provide a procedural reference point for the consideration of sustainability aspects. They all benefit when applied in common context, and can provide each other with necessary information. On a European scale this common context is elaborated with the work of CEN TC350. The status of development, key drivers and key success factors are elaborated in this paper.
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