EBC Annex 29 Daylight in Buildings

 

Status: Completed (1995-1999)

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 was 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 project sought 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 project focussed on those daylighting systems and strategies which could 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 were tested and performance evaluated through studies in laboratory facilities, by computer simulations, as well as in case study buildings. The performance assessment sought to cover visual, architectural and environmental aspects, including user acceptance of the systems. The project was divided into four research areas:

 

Performance evaluation of daylighting systems


The objective here was to provide a Design Guide on the performance of both innovative and conventional daylighting systems. Systems were assessed according to energy saving potential, visual aspects and the control of solar radiation. The evaluation of systems was based not only on technical feasibility but also on architectural and environmental impacts.

 

Daylight responsive lighting control systems


The objectives here were 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.

 

Daylighting design tools


The objective here was 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.

 

Case studies


The main objective here was 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 included illumination, the luminance distribution of the interior space, electrical lighting consumption, the total building energy consumption, and user acceptance of the environmental conditions.

Deliverables

–   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.

  

Participants: Australia, Austria, Belgium, Canada, Denmark, Finland, France, Germany, Italy, The Netherlands, Spain, Sweden, Switzerland, United Kingdom, and United States of America.

 

Publications

Daylight in Buildings, ECBCS Annex 29 / SHC Task 21 Project Summary Report
Kjeld Johnsen, Richard Watkins, AECOM, 2010
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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
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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.
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Daylight in Buildings: A Sourcebook on Daylighting Systems and Components
Nancy Ruck et al, IEA Solar Heating and Cooling Programme, Energy Conservation in Buildings and Community Systems Programme, 2000
Order Printed Copy £10.00 (Order Code ANN 29 2000:1)  

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.
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Daylight Responsive Lighting Control - Cases
Laurens Zonneveldt, Heiko Belendorf, et al
February 2001, 85 pp.
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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
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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
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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
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Application Guide for Daylight Responsive Lighting Control
Laurens Zonneveldt, Heiko Belendorf, et al, February 2001
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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
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