Operating Agent:
Dr.Kjeld Johnsen, Danish Building Research Institute, PO Box 119, 2970 Hørsholm,
Denmark
Tel: +45 4586 5533
Fax: +45 4586 7535
Email: kjj@sbi.dk
Summary
This project was carried out in partnership with the IEA Solar Heating and Cooling Implementing Agreement (Task 21). The objective of this Task is to develop a scientific, engineering and architectural basis to support the effective and economical integration of daylighting concepts into the design of non residential buildings. The Task seeks to promote daylight conscious building design saving energy through greater utilisation of natural light while at the same time improving visual comfort and control of solar gains.
The Task focuses on those daylighting systems and strategies which can be applied in new and existing buildings with a high aggregate electricity saving potential such as offices, schools, commercial and institutional buildings. Systems and strategies are tested and performance evaluated through studies in laboratory facilities, by computer simulations, as well as in case study buildings. The performance assessment seeks to cover visual, architectural and environmental aspects, including user acceptance of the systems. The Task is divided into four Subtasks:
Subtasks
Subtask A: Performance evaluation of daylighting systems. The objective of this subtask is to provide a Design Guide on the performance of both innovative and conventional daylighting systems. Systems will be assessed according to energy saving potential, visual aspects and the control of solar radiation. The evaluation of systems is to be based not only on technical feasibility but also on architectural and environmental impacts.
Subtask B: Daylight responsive lighting control systems. The objectives of this Subtask are to evaluate the performance of existing selected daylight responsive lighting control systems (in conjunction with selected daylighting systems) in terms of user acceptance of the systems. This will assist building owners, developers, architects and engineers to select and commission daylighting responsive systems, and to estimate the potential energy savings at an early stage of design.
Subtask C: Daylighting design tools. The objective of this subtask is to improve the capability, accuracy and ease-of-use of selected daylighting design and analysis tools for building design practitioners. The practitioners will be able to predict the performance of different daylighting systems and control strategies, and to evaluate the impact of the integration of daylighting in the overall building energy concept by using these design tools.
Subtask D: Case studies. The main objective of this task is to demonstrate the viability of daylighting buildings in various world climatic zones as a means of achieving significant improvements in building energy efficiency while maintaining a satisfactory visual and thermal environment for occupants. Measured performance data include illumination, the luminance distribution of the interior space, electrical lighting consumption, the total building energy consumption, and user acceptance of the environmental conditions.
The main deliverables from this Task will be:
- A system specific Design Guide on daylighting systems and
control systems providing recommendations on systems integration and
performance data on energy saving potentials.
- A set of Daylighting Design Tools that markedly improve the designers' ability to predict the performance of daylighting systems and control strategies and to evaluate the impact of daylighting integration in the overall design concept.
Provisional Participants: Australia, Austria, Belgium, Canada, Denmark, Finland, France, Germany, Italy, The Netherlands, Spain, Sweden, Switzerland, United Kingdom, and United States of America.
Publications Annex 29 |
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Daylight in Buildings: A Sourcebook on Daylighting Systems
and Components |
ADELINE 3
H. Erhorn, Fraunhofer Institute for Building Physics, Germany.
Version 3.0.
This software is an integrated lighting design computer tool that provides architects and engineers with accurate
information about the behavior and performance of indoor lighting systems. Both natural and artificial lighting
problems can be solved in simple rooms or complex spaces. Innovative and reliable results are produced by
processing data to perform light simulations and to produce comprehensive numeric and graphic information.
Software cost: EUR 500. Order via Fraunhofer Inst. Free brochures available.
Daylighting Monitoring Protocols & Procedures for Buildings
M. Atif, J. Love, and P.Littlefair
Institute for Research in Construction, Canada, October 1997,
#T21/D2.1/97-01.
This report provides build-related industries and institutions with a method to monitor the daylighting
performance of buildings, and to compare the daylighting performance of several buildings. The daylighting
areas addressed are daylighting contribution to indoor lighting, energy savings from displaced electrical
lighting consumption, and associated thermal loads from daylighting.
Free Download (External Website)
Validation of Daylighting Computer Programs
M Fontoynont M, P Laforgue, R Mitanchey, M Aizlewood, J Butt, et al
France, Vaulx-en-Velin, Ecole Nationale des Travaux Publics de l'Etat,
Département Génie Civil et Bâtiment - URA CNRS 1652, November 1999, 28 pp.
This report summarizes the comparison of simulation results as well as comparisons with data
obtained from measurements in scale models located in artificial skies for the daylighting softwares
Radiance, Superlite, Genelux, Adeline and LESO-Dial.
Contents
Order via IEA Solar Heating and Cooling Website (photocopy)
Leso-DIAL Software (Daylighting Design Software)
Switzerland, Laboratoire d'Energie Solaire et de Physique du Batiment, September 1999.
The aim of this computer software is to give architects relevant information regarding the use of
daylight at the very first stage of the design process. In this version (1.1), you can
describe up to 30 openings (6 for each facade and 6 in the roof). The software allows you to
calculate daylight factor values on the work plane and to estimate daylighting autonomy
(according to the lighting requirements, Leso-DIAL estimates the time during which no
artificial lighting is required). Best of all the software is user-friendly.
NOTE: This was updated in 2000. This software is only suited for central
European climates. Other climates and additional functions use DIAL-Europe.
For very complex geometry or photometry, we recommend the "Adeline" Software.
Cost: EURO 360. To order contact leso-pb[at]epfl.ch.
Applicability of Daylighting Computer Modeling in Real Case
Studies: Comparison between Measured and Simulated Daylight Availability and
Lighting Consumption
Anca D Galasiu and Morad R Atif
Canada, National Research Council Canada, Inst. for Research in Construction, Indoor Environment Research Program,
T21/C1-21/CAN/98-11, November 1998
This report investigates the accuracy and limitations of the ADELINE 1.0 lighting software in simulating the
luminance distribution from daylighting and the electrical lighting energy savings of an existing atrium building.
The purpose of the study was to compare the computed outputs from Superlite, Superlink and Radiance against data
collected in a real building.
Free Download (External Website)
Survey of Simple Design Tools
Jan de Boer, Hans Erhorn
Germany, Fraunhofer Inst für Bauphysik, May 1999, Report T21/C4-10/GER/98-05,
49pp.
Participants in Task 21, Daylight in Buildings, completed this survey.
In addition to a number of basic and already well-known tools, several
new design tools recently developed by institutes participating in the
Task are included. To allow for problem-sensitive selection, the survey
includes a table characterizing the reviewed tools.
Contents
Order via IEA Solar Heating and Cooling Website (photocopy)
Daylighting Design Tools: Results of Subtask C
Jan de Boer and Hans Erhorn (eds.)
Germany, Fraunhofer Institut für Bauphysik, December 1999, Report
T21/C-07/GER/99-12, 26 pp.
This report summarizes a survey of a cross-section of various simple daylighting design
tools and their different applications. The survey included tools based on analytical
solutions, tables, nomograms, diagrams, so-called protractors, simple computer tools,
typological studies and scale models. Several new designs tools also are included.
To allow for problem sensitive selection, the report includes a table to characterize the reviewed tools.
Contents
Order via IEA Solar Heating and Cooling Website (photocopy)
Survey of Architectural Daylight Solutions
Free Download (External Website)
Measurement of Luminous Characteristics of Daylighting Materials
Sirri Aydinli and Heinrich Kaase
Technical University of Berlin, Inst. of Electronics and Lighting, T21/A4-10/GER/99-11, September 1999
Free Download (External Website)
Application Guide for Daylight Responsive Lighting Control
Laurens Zonneveldt, Heiko Belendorf, et al
February 2001
Free Download (External Website)
Introduction Brochure to Application Guide
Free Download (External Website)
Case Studies of Daylight Responsive Lighting Control Systems
Laurens Zonneveldt, Heiko Belendorf, et al
February 2001, 85 pp.
Free Download (External Website)
Application of Daylighting Computer Modeling in Real Case Studies:
Comparison between Measured and Simulated Daylight Availabiligy and Lighting Consumption
Galasiu, A. D., and Atif, M. R.
T21/C1-21/CAN/98-11, November 1998, 68 pp.
Free Download (External Website)
POE Post Occupancy Evaluation of Daylight in Buildings: Procedures and Results
Staffan Hygge and Hans Allan Lofberg
Sweden, KTH Royal Institute of Technology, Centre for Built Environment, December 1999
Free Download (External Website)
Annex 29 work has been presented in over 70 speeches, more than 90 lectures,
over 60 papers at congresses and symposia, over 30 artices in journals and more than 40 national reports.
For the following reports, please enquire at the IEA Solar Heating and Cooling Website
Document on Test Room Facilities
Scale Model Measurements on Daylighting Systems
Daylighting Systems Database
Database of Daylight Responsive Lighting Control Systems
Daylight Simulation: Methods, Algorithms and Resources
Methodology of Atria Tool
Adeline 3.0 and Brochure
Daylight in Buildings - 15 Monitored Case Studies