| 1. |
- Frischknecht, R., et al.
(författare)
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Comparison of the environmental assessment of an identical office building with national methods
- 2019
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Ingår i: IOP Conference Series: Earth and Environmental Science. - : IOP Publishing. - 1755-1307 .- 1755-1315. ; , s. 012037-
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Konferensbidrag (refereegranskat)abstract
- The IEA EBC Annex 72 focuses on the assessment of the primary energy demand, greenhouse gas emissions and environmental impacts of buildings during production, construction, use (including repair and replacement) and end of life (dismantling), i.e. during the entire life cycle of buildings. In one of its activities, reference buildings (size, materialisation, operational energy demand, etc.) were defined on which the existing national assessment methods are applied using national (if available) databases and (national/regional) approaches. The "be2226" office building in Lustenau, Austria was selected as one of the reference buildings. TU Graz established a BIM model and quantified the amount of building elements as well as construction materials required and the operational energy demand. The building assessment was carried out using the same material and energy demand but applying the LCA approach used in the different countries represented by the participating Annex experts. The results of these assessments are compared in view of identifying major discrepancies. Preliminary findings show that the greenhouse gas emissions per kg of building material differ up to a factor of two and more. Major differences in the building assessments are observed in the transports to the construction site (imports) and the construction activities as well as in the greenhouse gas emissions of the operational energy demand (electricity). The experts document their practical difficulties and how they overcame them. The results of this activity are used to better target harmonisation efforts.
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| 2. |
- Frischknecht, R., et al.
(författare)
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Comparison of the greenhouse gas emissions of a high-rise residential building assessed with different national LCA approaches - IEA EBC Annex 72
- 2020
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Ingår i: IOP Conference Series. - : IOP Publishing. ; , s. 022029-
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Konferensbidrag (refereegranskat)abstract
- Introduction: The international research project IEA EBC Annex 72 investigates the life cycle related environmental impacts caused by buildings. The project aims inter alia to harmonise LCA approaches on buildings. Methods: To identify major commonalities and discrepancies among national LCA approaches, reference buildings were defined to present and compare the national approaches. A residential high-rise building located in Tianjin, China, was selected as one of the reference buildings. The main construction elements are reinforced concrete shear walls, beams and floor slabs. The building has an energy reference area of 4566 m2 and an operational heating energy demand of 250 MJ/m2a. An expert team provided information on the quantities of building materials and elements required for the construction, established a BIM model and quantified the operational energy demand. Results: The greenhouse gas emissions and environmental impacts of the building were quantified using 17 country-specific national assessment methods and LCA databases. Comparisons of the results are shown on the level of building elements as well as the complete life cycle of the building. Conclusions: The results of these assessments show that the main differences lie in the LCA background data used, the scope of the assessment and the reference study period applied. Despite the variability in the greenhouse gas emissions determined with the 17 national methods, the individual results are relevant in the respective national context of the method, data, tool and benchmark used. It is important that environmental benchmarks correspond to the particular LCA approach and database of a country in which the benchmark is applied. Furthermore, the results imply to include building technologies as their contribution to the overall environmental impacts is not negligible. Grant support: The authors thank the IEA for its organizational support and the funding organizations in the participating countries for their financial support.
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| 3. |
- di Bari, R., et al.
(författare)
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Buildings LCA and digitalization: Designers' toolbox based on a survey
- 2022
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Ingår i: IOP Conference Series: Earth and Environmental Science. - : IOP Publishing. - 1755-1307 .- 1755-1315. ; 1078:1
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Konferensbidrag (refereegranskat)abstract
- In a context of digitalization and increasing quality requirements, the building sector is facing an increasing level of complexity regarding its design process. This results in a growing number of involved actors from different domains, a multitude of tasks to be completed and a higher degree of needed expertise. New buildings are also required to reach higher performances in terms of environmental quality. To that regard, the exploitation of the full potential of digital tools can facilitate the integration of environmental aspects in the planning process, limit productivity shortcomings and reduce environmental impacts, which can result from an unaware decision making. Building environmental assessment can be performed through several Life Cycle Assessment (LCA)-based tools. “Pure calculation” tools quantify final buildings' environmental potential, while “complex tools” additionally support decision making during the planning process. It is often difficult to choose the best suitable tool, which strongly depends on the user's needs. Within the IEA EBC Annex 72, a survey was realized with the main objective of creating a comprehensive overview of the existing tools dedicated to buildings LCA. The questionnaire included the usability, functionality, compliance, data reliability and interoperability of the analysed tools. Lastly, based on the survey outcomes and their critical assessment, a procedure for the identification and selection of a tool has been proposed based on user's needs. As a result, this work outlines main features of currently available building LCA tools, for which there is a harmonized status in terms of usability and overall applied LCA methodology. Despite the need for more automatized workflows, tools' embedding is mostly not yet applicable in system chains or limited to a restricted number of tools.
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| 4. |
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| 5. |
- Edwards, K, et al.
(författare)
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Using Chronicle Workshop to quantify impact of context in case studies
- 2014
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Ingår i: In: Kasper Edwards & Jørgen Winkel (Eds.) Abstract book, The 8th Novo symposium: Sustainable Health Care Production Systems, Copenhagen, November 6 - 7, 2014, Technical University of Denmark..
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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| 6. |
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| 7. |
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| 8. |
- Rasmussen, F. N., et al.
(författare)
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Existing benchmark systems for assessing global warming potential of buildings : Analysis of IEA EBC Annex 72 cases
- 2022
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Ingår i: IOP Conference Series. - : IOP Publishing.
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Konferensbidrag (refereegranskat)abstract
- Life cycle assessment (LCA) is increasingly being used as a tool by the building industry and actors to assess the global warming potential (GWP) of building activities. In several countries, life cycle based requirements on GWP are currently being incorporated into building regulations. After the establishment of general calculation rules for building LCA, a crucial next step is to evaluate the performance of the specific building design. For this, reference values or benchmarks are needed, but there are several approaches to defining these. This study presents an overview of existing benchmark systems documented in seventeen cases from the IEA EBC Annex 72 project on LCA of buildings. The study characterizes their different types of methodological background and displays the reported values. Full life cycle target values for residential and non-residential buildings are found around 10-20 kg CO2e/m2/y, whereas reference values are found between 20-80 kg CO2e/m2/y. Possible embodied target- and reference values are found between 1-12 kg CO2e/m2/y for both residential and non-residential buildings. Benchmark stakeholders can use the insights from this study to understand the justifications of the background methodological choices and to gain an overview of the level of GWP performance across benchmark systems.
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| 9. |
- Winkel, Jörgen, 1946, et al.
(författare)
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Introduction of Lean/Value Stream Mapping at hospital units in three Nordic countries and expected impact on the working environment - A Nordic Multicenter study
- 2013
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Ingår i: International HELIX Conference 2013.
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Konferensbidrag (refereegranskat)abstract
- Conceptual framework and Purpose A recent review has documented mostly negative effects of rationalization on musculoskeletal and mental health and corresponding risk factors. This goes in particular for the healthcare sector (Westgaard & Winkel, 2011). Lean Practices are increasingly used in healthcare and Value Stream Mapping (VSM) seems to be a commonly used tool to identify and minimize waste (Keyte & Locher, 2004). The health impact of Lean varies considerably between investigations. This may to a large extend be due to differences in the operationalization of Lean (Brännmark et al, 2012). VSM is a participatory tool, i.e. those affected by this type of rationalization are performing the analyses and subsequently suggesting the interventions. Participation has been shown to be crucial to obtain ownership of the suggested interventions and thereby increased impact. On this background rationalizations based on VSM may offer a procedure that also includes working environment issues. In addition, workplaces in the Nordic countries seem to offer good opportunities for realizing a true participatory approach considering also working environment issues when rationalizing a value stream (Guðmundsson, 1993; Westgaard & Winkel, 2011). VSM has been shown to be a powerful rationalization tool in the elimination of non-value-adding tasks (non-VAT). Several studies show that non-VAT generally offer less risky physical and mental exposures (e.g. Kazmierczak et al, 2005; Østensvik et al, 2008; Palmerud et al, 2012; Jonker et al, 2013). According to this, non-VAT is usually named “the porosity of the working day” (Marx, 1867; Westgaard & Winkel, 2011; Winkel & Westgaard, 2001). Strong political demands to maximize efficiency in healthcare may thus potentially result in an excessive rationalization causing a too large reduction in porosity and thus too risky work intensification. In practice Lean is often perceived as a “threat” by employees at hospitals (Härenstam et al, 2000; many personal communications). In contrast, most Lean consultants generally describe Lean as an opportunity for improvements also in terms of the working environment (numerous personal communications). On this background an ergonomic complement to VSM, the ErgoVSM, has been developed based on existing scientific evidence and in close co-operation with Swedish industry and the healthcare sector (Jarebrant et al, 2013). The ErgoVSM also considers health issues, i.e. risk factors for musculoskeletal and mental health in addition to reduction of waste (Jarebrant et al, 2004; 2009). In this paper we present some preliminary data based on 1st line managers’ assessments of expected impact of action plans based on VSM and ErgoVSM. The presented data are retrieved from a larger NOVO Multicenter Study (Winkel et al, 2012). Design/Methodology Fourteen hospital wards in Denmark, Iceland and Sweden are investigated. Seven of these are using VSM and the remaining the ErgoVSM to improve the efficiency of their patient flows. Current and future states are assessed and action plans presented. 1st line managers are then interviewed and asked to assess expected impact of each suggested intervention in the action plan in terms of efficiency, treatment quality, physical and psychosocial working environment. So far five of the fourteen 1st line managers have been interviewed. Two of the wards have used the VSM tool and 3 the ErgoVSM tool. Results and Discussion All together 103 amendments for improved performance have been assessed in the five action plans. Eighty-one of these were assessed also to imply improvements in the working environment. Three suggestions were expected to imply a negative impact and four no impact on the working environment. Fifteen suggestions were not rated as they were decided not to be realized. Using VSM or ErgoVSM did not influence the assessment of expected impact of amendments in the action plan. The dominance of expected positive impact on the working environment of the amendments will be discussed in terms of potential bias and real opportunities. The Multicenter Study includes follow-up investigations of realized impact on the working environment as well as potential national differences between the three investigated countries (cf. Birna & Gunnarsdóttir, 2012; Edwards & Winkel, 2012; Jarebrant et al, 2012).
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| 10. |
- Winkel, Jörgen, 1946, et al.
(författare)
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May sustainability of patient flows at hospitals be increased by adding a work environment module to Value Stream Mapping (VSM)? - A NOVO Multicenter study in Denmark, Iceland and Sweden
- 2014
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Ingår i: In: Kasper Edwards & Jørgen Winkel (Eds.) Abstract book, The 8th Novo symposium: Sustainable Health Care Production Systems, Copenhagen, November 6 - 7, 2014, Technical University of Denmark. ; , s. 23-24
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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