| 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. |
- Dubois, Marie-Claude, et al.
(författare)
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Performance Evaluation of Lighting and Daylighting Retrofits: Results from IEA SHC Task 50
- 2016
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Ingår i: Proceedings of the 4th International Conference on Solar Heating and Cooling for Buildings and Industry (SHC 2015). - : Elsevier BV. - 1876-6102. ; 91, s. 926-937
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Konferensbidrag (refereegranskat)abstract
- This article presents some results from a large monitoring campaign performed in 22 buildings around the world as part of International Energy Agency (IEA) Task 50 “Advanced lighting solutions for retrofitting buildings”. This article mainly addresses the work of Subtask D, which aims to demonstrate sound lighting retrofit solutions in a selection of representative, typical Case Studies. In order to evaluate the Case Studies, a monitoring protocol was developed to assess the overall lighting performance taking into consideration: 1) Energy use, 2) Retrofit costs, 3) Photometric assessment, and 4) User assessment. The monitoring was carried out from June 2014 to December 2015 in 22 non-residential buildings in ten countries. This article presents results from selected Case Studies, drawing conclusions regarding retrofit solutions as well as reflecting on methodological procedures for the measurements and data collection. Measured data as well as key conclusions from Subtask D will be summarized in an electronic web and portable sourcebook at the end of the IEA Task 50 (December 2015), which will be freely available through the Internet.
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| 4. |
- Dubois, Marie-Claude, et al.
(författare)
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T50 D.3 Monitoring protocol for lighting and daylighting retrofits
- 2016
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- This document presents a monitoring protocol to assess the overall performance of a lighting and/or daylighting retrofit of a building. This protocol covers four key aspects:1. Energy use;2. Retrofit costs;3. Photometric assessment;4. User assessment.This document develops each aspect in detail, presenting the required measurements and necessary equipment as well as providing guidelines for data analysis.The protocol is written as a general guideline document which could be used by non-expert assessors. A step-by-step general procedure is described, including five main phases, where each phase is described in detail, including the required documentation for two distinct monitoring levels: a ‘basic’ and a ‘comprehensive’ monitoring level.
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| 5. |
- Gentile, Niko, et al.
(författare)
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A toolbox to evaluate non-residential lighting and daylighting retrofit in practice
- 2016
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Ingår i: Energy and Buildings. - : Elsevier BV. - 1872-6178 .- 0378-7788. ; 123, s. 151-161
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Tidskriftsartikel (refereegranskat)abstract
- In the field of lighting and daylighting, standard monitoring procedures to assess the overall performance of retrofit projects are scarce. Nevertheless, access to monitored data is crucial in assessing whether daylighting or electric lighting systems deliver the expected performance in terms of cost-effectiveness, energy efficiency and lighting quality. In order to bridge this gap, a lighting retrofit evaluation toolbox was developed as a part of the International Energy Agency − Solar Heating and Cooling Programme (IEA-SHC) Task 50: “Advanced Lighting Solutions for Retrofitting Buildings”. The evaluation toolbox focuses on non-residential buildings and covers four key aspects: energy efficiency, costs, quality of the lighting environment and user satisfaction. This article presents the main features of this evaluation toolbox, along with some lessons learned from its application in selected case studies.
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| 6. |
- Gentile, Niko, et al.
(författare)
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Monitoring protocol to assess the overall performance of lighting and daylighting retrofit projects
- 2015
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Ingår i: Energy Procedia. - : Elsevier BV. - 1876-6102. ; 78, s. 2681-2686
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Konferensbidrag (refereegranskat)abstract
- In the field of lighting and daylighting, standard monitoring procedures to assess the overall performance of retrofit projects are scarce. Nevertheless the access to monitored data is crucial to assess whether daylighting or electric lighting systems deliver the expected performance in terms of cost-effectiveness and energy efficiency. In order to bridge this gap, a monitoring protocol is under development as part of the International Energy Agency – Solar Heating and Cooling Programme (IEA-SHC) Task 50 ‘Advanced Lighting Solutions for Retrofitting Buildings’. The protocol focuses on lighting and/or daylighting (façade or roof) retrofit in the non-residential building stock. It covers four key aspects: energy efficiency, costs, quality of the lighting environment and user satisfaction. The main features of this protocol are presented in this paper, along with some lessons learned from the ongoing application on selected case studies.
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| 7. |
- Kaempf, Jérôme, et al.
(författare)
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T50 C.1 Lighting retrofit in current practice - Evaluation of an international survey
- 2016
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Surveys and socio-professional studies carried out at national and international levels contribute to a better understanding of the lighting retrofit process. Within the framework of the International Energy Agency Task 50 - Advanced lighting solutions for retrofitting buildings- and its subtask C1 focusing on the analysis of workflows and needs, an online survey on lighting retrofit was initiated in December 2013.After 9 months, more than 1000 answers were collected. The survey provides clear insights about the workflow of building professionals and leads to a better understanding of their needs in terms of computer method and tools.One of the main outcomes of the survey is that retrofitting strategies used in practice essentially focus on electric lighting actions such as of luminaires replacement and the use of controls. Generally, daylighting strategies are not rated as the highest priority. The results also indicate that practitioners mainly rely on their own experience and rarely involve external consultants in the lighting retrofit process. Furthermore, the survey results suggest that practitioners are interested in user-friendly tools allowing quick evaluations of their project, with a good compromise between cost and accuracy, and producing reports that can be directly presented to their client.The survey also emphasized that the main barriers in using simulation tools are essentially their complexity and the amount of time it takes to perform a study. Practitioners are keen to use tools at preliminary design stage and would like to be able to estimate the cost and other key figures (energy consumption and lighting levels). The paper concludes with recommendations for the building software developers to address the needs of practitioners in a more suitable way.
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| 9. |
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| 10. |
- Fontoynont, Marc, et al.
(författare)
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Survey on opportunities and barriers in lighting controls
- 2021
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- This report summarizes a survey performed in eight countries on the status quo of daylight and electric lighting control systems. Feedback from more than 100 international experts (building / facility managers and planers) was evaluated. The aim of the survey was to identify the perception of the different possibilities of the current lighting control solutions and the expectations about the control systems. The survey aims to provide a mapping of the current lighting control systems available at the market and an overview of which functions are perceived as most important and which areas are found to be improved. Participants of the survey had to rank each question in relation to the perceived importance and the need for improvement. The survey enclosed five general topics; energy, operational aspects, occupant control, occupant comfort and control functionality.The findings from the summary suggest, that the two main reasons for the implementation of lighting control systems are:1. The possibility to reduce the electric lighting consumptions and2. The opportunity to increase the user’s well-being and thereby reduce complaints from the users.From a user perspective, this means that the lighting system must ensure visual acuity and comfort by providing a sufficient level of illuminance and the ability to regulate the light level. Always in relation to the task and the ambient light in the space, and thereby creating a pleasant and comfortable light environment. Research suggests, when giving the users some manual control possibilities, the satisfaction with the lighting conditions in general increases The users should be able to both increase and dim the light levels or completely turn it off. Thissuggests, if the lighting control system is designed to regulate the illuminance automatically, it should be provided some kind of manual override. This is supported by the findings in the surveys, where all countries in one way oranother find it important to provide the users with some possibility of user control. This as well applies to the control of the shading system in relation to avoid glare from high daylight intensities and undesired solar radiationcoming into the space. This increases the risk of overheating, resulting in an increased ventilation and/or cooling need leading to a higher energy use. However, in the two Scandinavian countries, it is found less important withthe possibility to control the shadings in order to reduce glare from daylight and undesired heat transmission in the space. This may be due to the higher latitude and thereby a lower intensity of the daylight.In relation to the importance of user control, the findings additionally suggest, that the occupant control must be simple to operate. A control system which is easy for the users to understand intuitive, will most likely increase the chances of an ‘optimal’ interaction with the system. If the system does not meet the users need or is too complex to use, the possibility that the users will try to override the control systems increases, and this will most likely result in increased energy consumption.
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