| 1. |
- Altomonte, Sergio, et al.
(författare)
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Evaluating integrated lighting projects - A Procedure to Post-Occupancy Evaluation of Daylight and Electrical Lighting Integrated Projects
- 2021
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- This report presents tools for post-occupancy evaluation (POE) to evaluate indoor lighting of commissioned projects (‘case studies’) under a common framework. In this report, POE includes technical environmental assessment (TEA) and observer-based environmental assessment (OBEA). The framework proposed in this report evaluates four key aspects of the case study:1. Energy use (electrical lighting systems),2. Visual effects (Indoor lighting environment /photometry)3. Non-visual effects (circadian potential), and4. The user (subjective/surveys and observations)The report targets industry professionals, building designers, lighting designers, building managers, researchers and/or owners wishing to evaluate projects where lighting is supplied by a combination of electrical lighting, daylighting systems (e.g., fenestrations) and assisted technologies (e.g., smart sensors). The framework in this report makes available methods and procedures related to the evaluation of integrated lighting performance in residential and non-residential buildings and its impact on users, and it summarises and categorize methods and procedures in an accessible and industry-oriented language.The content of this document is based on methods and procedures used by participating experts in IEA SHC Task 61 for monitoring twenty-five worldwide integrated daylighting and electric lighting case studies. Since integrated lighting projects are different in type and scopes, the methods and procedures included in the framework do not follow a rigid protocol. Practitioners should use the framework to define the scope of POE monitoring in terms of the aims of the project, context, and resources available. The document is thus a toolbox for planning and executing the monitoring of their integrated lighting projects.
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| 2. |
- Altomonte, Sergio, et al.
(författare)
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Integrating daylighting and lighting in practice : Lessons learned from international case studies
- 2021
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- This report presents lessons learned from twenty-five worldwide real-life case studies implementing the integration of daylighting and electric lighting. The case studies were monitored with respect to energy use for lighting, visual performance, non-visual performance, and users’ satisfaction. The monitoring is largely based on field measurements, but it is also complemented with simulations and calculations where needed.The report is divided in two parts. The first part provides an overview of the case studies and the overall lessons learned. The second part provides factsheets for each of the case studies; the factsheets include details on the monitoring, results, and specific lessons learned.Based on the lessons learned from the case studies, this report concludes that:• The energy demand for lighting is drastically reduced thanks to the combined effect of more efficient light sources, advances in controls, and raised awareness in the integration of daylighting and electric lighting.• Integrative lighting is currently driving the innovation in lighting technology and wider implementation is expected as knowledge in the field of non-visual requirements for lighting expands.• However, the current integration of the integrative lighting concept with daylighting in practice is limited, which may result in significant energy rebound (increases).• Daylighting integration is of utmost importance for achieving quality beyond energy savings.• Integrated daylighting and electric lighting design is facing new challenges: questions connected with comfort and health are yet to be answered
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| 3. |
- Gentile, Niko, et al.
(författare)
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Evaluation of integrated daylighting and electric lighting design projects: Lessons learned from international case studies
- 2022
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Ingår i: Energy and Buildings. - : Elsevier BV. - 0378-7788. ; 268
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Tidskriftsartikel (refereegranskat)abstract
- This article presents and discusses the lessons learned from the monitoring of 25 integrated daylighting and electric lighting international case study projects. The case studies consist of real occupied buildings that have been monitored as part of the International Energy Agency (IEA) SHC Task 61/EBC Annex 77 Programme. The general goal of the case studies was to balance lighting energy use with occupants’ visual and non-visual requirements. This was achieved using innovative solutions for daylighting and electric lighting with advanced controls, but also implementing simple and out-of-the-box strategies. The findings suggest that energy demands for lighting can significantly be reduced by combining sensible daylight provision, efficient lighting sources, and advances in controls. Yet, the effective achievement of project goals requires adequate monitoring, fine-tuning, and verification. The findings also suggest that the adoption of “integrative” lighting – that is, lighting systems that address both visual and non-visual responses – is getting increasingly popular. Catering to non-visual requirements will likely drive further innovation in lighting technology. Currently, there is limited investment available for developing daylighting systems for integrative lighting, and the current related electric strategies often come at the risk of energy rebound effects. Overall, providing daylighting and understanding user requirements are fundamental steps towards achieving quality projects, with potential benefits beyond saving energy.
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| 4. |
- Gentile, Niko, et al.
(författare)
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Literature review - Energy saving potential of user-centered integrated lighting solutions
- 2021
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- This report presents lessons learned from twenty-five worldwide real-life case studies implementing the integration of daylighting and electric lighting. The case studies were monitored with respect to energy use for lighting, visual performance, non-visual performance, and users’ satisfaction. The monitoring is largely based on field measurements, but it is also complemented with simulations and calculations where needed.The report is divided in two parts. The first part provides an overview of the case studies and the overall lessons learned. The second part provides factsheets for each of the case studies; the factsheets include details on the monitoring, results, and specific lessons learned.Based on the lessons learned from the case studies, this report concludes that:• The energy demand for lighting is drastically reduced thanks to the combined effect of more efficient light sources, advances in controls, and raised awareness in the integration of daylighting and electric lighting.• Integrative lighting is currently driving the innovation in lighting technology and wider implementation is expected as knowledge in the field of non-visual requirements for lighting expands.• However, the current integration of the integrative lighting concept with daylighting in practice is limited, which may result in significant energy rebound (increases).• Daylighting integration is of utmost importance for achieving quality beyond energy savings.• Integrated daylighting and electric lighting design is facing new challenges: questions connected with comfort and health are yet to be answered.
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| 5. |
- Favero, Federico
(författare)
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Light Rhythms : Exploring the Perceptual and Behavioural Effects of Daylight and Artificial Light Conditions in a Scandinavian Context
- 2024
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This compilation thesis collects multidisciplinary work on the study of the impact of light rhythms on perception and behaviour. The thesis was structured to answer and discuss the questions: “How does a person feel and behave inan illuminated space?” and “Do variable light conditions influence perception, appraisal and motion?”. In order to answer the questions, I applied methods from design, psychology and behavioural science, conducted literature reviews and performed two experimental studies. In response to the first question, the outcome of the five papers included in the thesis show that light and lighting rhythms elicit specific acute and long-term effects. These effects impact on these categories of aspects: visual and perceptual, appraisal and experience, behavioural and physiological. To structure and visualize these diverse aspects, I introduce the CLAPP framework: Context Light(ing) Action (behaviour), Perception, Person. The framework highlights the complex interplay between light, environment, and human response, by displaying features related to spatial and light rhythms, effects of light on mind and body, and personal features. The framework can provide structure and direction for education and research activities within the scope of Architectural Lighting Design. In response to the second research question, results from the experimental studies reveal that, even after eliminating view and sunlight, variable daylight conditions elicit better mood, higher pleasure, and influence motion, compared to artificial light conditions. The results of this thesis may contribute to achieving the UN sustainability goals, specifically to improve the well-being of the population (SDG3), to design a built-environment that is safe and resilient (SDG 11), and to promote the uses of affordable and clean energy (SDG 7). Building on the experience gained during this thesis work, I am confident that multidisciplinary collaboration will enable to integrate the diverse aspects included in the CLAPP framework, paving the way for the design of spaces that are both resilient and supportive of health.
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| 6. |
- Gentile, Niko, et al.
(författare)
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Energy saving potential for integrated daylighting and electric lighting design via user-driven solutions: A literature review.
- 2019
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Ingår i: Proceedings of the 29th Session of the CIE : CIE x046:2019 - CIE x046:2019. - 9783902842749 ; 1, s. 205-215
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Konferensbidrag (refereegranskat)abstract
- Measures for the reduction of electric energy loads for lighting have predominantly focussed on increasing the efficiency of lighting systems. This efficiency has now reached levels unthinkable a few decades ago. However, a focus on mere efficiency is physically limiting, and does not necessarily ensure that the anticipated energy savings actually materialise. This paper presents a literature survey aimed at identifying control strategies and user behaviours leading to a reduction in lighting energy use. Whenever possible, the strategies and behaviours discussed are supported by quantitative data. This survey is part of a more extensive review of the potential for reducing energy use through the integrated design of daylight and electric lighting and their control systems. It concludes with identifying key aspects for lighting control decisions with respect to daylight use, control strategies, control interfaces, feedback systems, rebound effects and social norms regarding user behaviour and makes recommendations for further research.
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| 7. |
- Naves David Amorim, Claudia, et al.
(författare)
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Integrated Solutions for Daylighting and Electric Lighting: IEA SHC Task 61/EBC Annex 77, Subtask D – Proposal and First Results
- 2021
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Ingår i: PLEA 2020 - Planning Post Carbon Cities : Proceedings of the 35th International Conference on Passive and Low Energy Architecture - Proceedings of the 35th International Conference on Passive and Low Energy Architecture. - 9788497497947 ; 3, s. 1739-1744
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Konferensbidrag (refereegranskat)abstract
- The integration of daylight and electric lighting, considering user satisfaction and energy savings potentially can contribute significantly to reduce energy demand for lighting, that represents 18% of global energy demands. This paper presents the work and first results of IEA SHC Task 61/EBC Annex 77 “Integrated Solutions for Daylighting and Electric Lighting: From component to user centered system efficiency”, a joint project activity between the Solar Heating and Cooling (SHC) and Energy in Buildings and Communities (EBC). The project deals with the idea that an integrated design approach for the whole system, combining daylighting, electric lighting, the associated lighting controls and the users’ interaction, can achieve higher energy saving than the simple energy-efficient design of single components. First results show the main experience from three completed case studies.
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