LUMINOUS AUTONOMY · 2017. 11. 5. · Sketchup model. This indicator evaluates the performance in Daylighting in unfavourable conditions, the overcast sky. It allows to understand
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Natural light is an essential
part of architecture and
urban planning.
The luminous ambience in
natural light influences
various points of view like
energetic and scientific,
poetic, sensitive, qualitative.
The evaluation of daylight
for spaces in design helps
the participants in the
project in their quest for
energy savings, comfort and
pleasantness.
For future users of the
project, daylight ambience
contributes to health and
well-being in the spaces,
and also to productivity
within the work spaces.
Natural light is part of the
sustainability assessment
methods in most countries
and its evaluation is now
necessary for certifications.
DL-Light is the software suite developed by De Luminæ to help
the evaluation of the intake and distribution of natural light in
architectural and urban spaces.
It uses the latest research results in daylighting and simulation
techniques. It combines the validated algorithms of Radiance
with a very intuitive interface.
DL-Light allows:
1/6De Luminæ contact@deluminaelab.com https://www.deluminaelab.com https://www.facebook.com/deluminae
Designed to take into account all types of situations and
climates, DL-Light is used all over the world in Australia,
Belgium, Canada, France, Germany, Holland, Hong-Kong,
Mexico, Norway, Spain, Sweden, United-Kingdom, USA, etc.
to understand the qualities of the luminous ambience,
to answer to sustainable certifications requirements,
to verify the correspondence to architectural intentions,
to convince of the qualities of the project.
Reliable, fast and intuitive daylight simulation
for 3D architectural and urban models directly
integrated within SketchUp graphic modeler
https://deluminaelab.com/en/download-dl-light
DL-Light calculates luminous
autonomy in Daylighting to
evaluate how many hours per
year artificial lighting is
unnecessary.
This indicator has been created
to quantify the performance of
natural light using an
illuminance threshold to
maintain. Hence it helps to
quantify the consumption of
energy due to artificial lighting
to maintain that minimum
illuminance level.
The module allows to calculate
directly Breeam requirements
or custom criteria.
The analysis of luminous
autonomy considers that, when
natural light is sufficient,
artificial lighting is not used.
The calculation is performed
versus a threshold illuminance
level, often at 300 or 500 lux,
and during occupied hours of
the building.
The ray-tracing simulations of
illuminance are performed hour
per hour and compared to the
defined threshold.
It uses the 3D model, the
characteristics of materials
defined for the project, the
environment geometry and
climatic data.
LUMINOUS AUTONOMYRequirements in International Certifications
Beige areas are autonomous more than 80% of the time.
Light blue areas are autonomous less than 10% of the time.
Orange areas are autonomous
between 65% and 75% of the time.
Light green areas are autonomous
between 45% and 55% of the time.
Luminous Autonomy in SketchUp 3D
https://deluminaelab.com/en/download-dl-light
2/6De Luminæ contact@deluminaelab.com https://www.deluminaelab.com https://www.facebook.com/deluminae
Threshold 500 luxThreshold 300 lux
DL-Light calculates the Daylight
Factor. Following the same
logic as autonomy, you can
easily visualize the DF of your
interior spaces inside the
Sketchup model.
This indicator evaluates the
performance in Daylighting in
unfavourable conditions, the
overcast sky. It allows to
understand how the light from
the sky is distributed in the
interior spaces.
This module directly calculates
the daylight factor, but also the
Breeam requirements for
average DF, minimum DF and
uniformity.
The analysis of the Daylight
Factor shows how the light
from the sky illuminates
interior spaces. DF does not
take into account direct light
from the sun.
It is independent from the real
climatic conditions of the site
and from building orientation.
Like all our modules, it uses
ray-tracing simulations via
Radiance calculation engine in
order to calculate illuminance
with precision.
Daylight Factor inside the SketchUp 3D model
DAYLIGHT FACTORRequirements in International Certifications
Turquoise areas have DF between 3,2 and 4,8.
Dark blue areas have DF between 0 and 1,6.
Daylight Factor on a whole floor in the SketchUp model
Analysis report for all surfaces
3/6De Luminæ contact@deluminaelab.com https://www.deluminaelab.com https://www.facebook.com/deluminae
https://deluminaelab.com/en/download-dl-light
Micro-urban level, influence of the passageway of façade insulation
DL-Light calculates the
number of hours when direct
sunrays hit the faces of a
SketchUp model. This allows
to make precise solar studies.
It takes into account the
meteorological data of the
site, the clear skies, he
overcast ones, etc. It is much
more than a simple shadow
visualizer.
It calculates for a whole
period, a season, a whole year
or a unique moment.
As soon as the sketch phase,
DL-Light shows the surfaces to
protect, to insulate, the faces
that may be favorable to
passive solar, faces that risk
overheating, glare, etc. It
allows:
- The identification of glazed
surfaces with risks of glare or
overheating and that require
protection.
- The evaluation of glazing
protection efficiency and the
comparison of alternatives.
- The identification of faces
favorable to passive solar
benefits or to place active
solar panels.
- To help the precise
positioning of glazed surfaces
according to solar rays and
site climate.
DIRECT SUN MAPSShadow maps
Exposure to direct
sunrays in summer.
Outside and inside
surfaces within the
SketchUp 3D model
Green areas receive direct sunrays 3h20min per day.
Blue areas receive direct sunrays less than 1/2 hour per day.
Red areas receive direct sunrays more than 5 hours per day.
During the winter season,
Green areas receive direct sunrays 24 mins per day.
Red areas receive direct sunrays more than 2.5 hours per day.
4/6De Luminæ contact@deluminaelab.com https://www.deluminaelab.com https://www.facebook.com/deluminae
https://deluminaelab.com/en/download-dl-light
DL-Light computes the Sky
View Factor.
The view of the sky in
architectural and urban
projects is an important aspect
of the well-being inside spaces.
The SVF module allows to
easily understand sky visibility
for all the chosen spaces thanks
to a visualization with False
Color patches along with a
quantification on the color
palette.
The Sky View Factor is the
fraction of visible sky from the
various surfaces of the model.
The value of the sky view factor
may be represented as
percentage or solid angle.
Sky View Factor extension is
designed for early design
phases of the project, when the
level of details is low. Only a
minimum of information about
the environment, the position
and project geometry is
necessary.
Information of the Sky View
Factor for various surfaces of
the project influence decisions
on heating, cooling and lighting
strategies at early stages.
Sky View Factor on an urban
area for a housing project
General and detailed view in
SketchUp
SKY VIEW FACTOR
Dark blue areas see 2% to 4% of the sky.
Light blue areas see 11% to 13% of the sky.
5/6De Luminæ contact@deluminaelab.com https://www.deluminaelab.com https://www.facebook.com/deluminae
Dark blue areas see 2% to 4% of the sky.
Light blue areas see 100% of the sky.
Sky view factor in SketchUp – Open Space
https://deluminaelab.com/en/download-dl-light
De Luminæ is a technical and research office in natural and artificial lighting, its impacts on energy
consumption and the improvement of comfort and pleasantness for sustainable buildings and cities.
De Luminæ produces and distributes the software DL-Light, based on Radiance, for the design and
evaluation of architectural and urban ambiances in Daylighting. De Luminæ has developed expertise
in software Radiance, internationally renowned for the scientific quality of its results and that allows
to simulate the most complex situations.
As it comes from the research field, De Luminæ keeps a strong R&D activity in order to maintain a
high level of expertise and a constant innovative strategy.
De Luminæ was founded by Ljubica Mudri and Jean-Dominique Lénard. Ljubica Mudri is Architect,
PhD in Energetics from the Ecole Nationale Supérieure des Mines de Paris, specialist in Daylighting.
She has been teaching Daylighting in various universities in France. Jean-Dominique Lénard, PhD in
Applied Maths from University Paris-Dauphine, MSc Applied Mathematics from the London School of
Economics (LSE), specialized in simulation techniques. They have published the results of their
researches in many international journals and congresses.
De Luminæ has developed a strong expertise in Daylighting in order to contribute to the most varied
questions: highly complex architecture, specific interior and exterior spaces, luminous discomfort,
subjective questions, etc.
De Luminæ accompanies architects, consultants, building buyers and users to answer 3 main
questions, essential to energetics and comfort:
Quantity of light, is there enough natural light in the spaces for the intended activities ?
Comfort/discomfort, how is natural light distributed in the spaces or why do users complain ?
Pleasantness, does natural light contribute to create a pleasant space that corresponds to the intentions?
Contact us
Email : contact@deluminaelab.com
Web : https://www.deluminaelab.com
De Luminæ contact@deluminaelab.com https://www.deluminaelab.com https://www.facebook.com/deluminae 6/6
National French Bank :
French Television :
Toulouse Hospital :
Office Towers :
Orléans Private Hospital:
Examples
of intervention
Luminous discomfort in natural/artificial lighting and improvement project.
Conformity to French environmental certification for visual comfort.
Luminous discomfort in Post-anesthesia recovery rooms.
Impact of flooring on energy consumption, environmental certification.
Study of color profile in interior spaces & conformity to environmental
certification.
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