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Transcript of Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 1 DAYLIGHTING CONCEPTS Mt. Angel...
![Page 1: Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 1 DAYLIGHTING CONCEPTS Mt. Angel Library by Alvar Aalto; featuring a major daylight “fixture”](https://reader030.fdocuments.in/reader030/viewer/2022032704/56649d765503460f94a576cb/html5/thumbnails/1.jpg)
Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 1
DAYLIGHTINGCONCEPTS
Mt. Angel Library by Alvar Aalto; featuring a major daylight “fixture”
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 2
Daylighting
Daylighting has always been of major importance, but somehow during the 1960s, we forgot everything we knew
about the art and science of daylighting. Cheap energy and air conditioning
did us in.
William Caudill in the Foreword to Daylight in Architecture
an example of the allure and power of active systems
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 3
^^ Kimbell Art Museum, Ft. Worth, TX
Mt. Angel Library, Mt. Angel, OR >>
daylighting offers great opportunities for creative design
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 4
Daylight Components
The daylight reaching a given point within a building generally consists of a mix of the following components (which show up as elements in some design analysis methods):
-- a sky component (SC)
-- an externally reflected component (ERC)-- an internally reflected component (IRC)
these “internal” components are related to—but not the same as—the direct, diffuse, and reflected resource components that comprise light falling on an aperture
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 5
Daylight Components
DF = SC + ERC + IRC
the “sky” component is not the same as a “direct solar” component
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 6
A Daylighting Design Process
• Establish lighting system design intent and criteria• Daylighting may be a reasonable method to achieve intent• If so, select a likely daylighting implementation method
(an approach or approaches)• Validate that the approach actually works (that the result
meets intent and criteria) using appropriate design tools• Refine the initial design solution as required using
appropriate analysis tools; validate the final design solution• Develop construction drawings and specifications• Commissioning the daylighting system design (critical)• Construct• Commissioning the daylighting system (especially controls)• Occupy building; validate system in place and in use; learn
and communicate the lessons learned
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 7
Daylighting Design Issues
• The source of light is variable– addressed through the design process– addressed via coordination with electric lighting– addressed in usage by space occupants
• The source of light is outside the building– light must be brought into a building– light must be skillfully distributed from an aperture located at
the periphery of a space
• These are primarily architectural design issues– architects must take the lead– daylighting potential is established with the first design moves
(plan, orientation, and massing)
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 8
General Daylighting Approaches
• Sidelighting– Unilateral or bilateral– Windows– Clerestories (if low)
• Toplighting– Skylights– Clerestories (if high)
• Hybrids and combinations
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what about “bottomlighting”?
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 9
Sidelighting (if unilateral)
illuminance drops off fairly quickly as distance from aperture increases
illuminance (lux, FC or DF) on horizontal task plane
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 10
Sidelighting (if bilateral)
illuminance drops off fairly quickly as distance from aperture increases;but two opposing apertures help to balance light distribution across space
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 11
Toplighting (if single aperture)
illuminance drops off fairly quickly as distance from aperture increases
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 12
Hybrid Approaches
illuminance from skylight fills in “gap” caused by sidelight distribution pattern
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 13
Daylighting System Components
• Light source the sky not direct sun• Apertures (openings—such as windows or skylights)
• Aperture modifications (lightshelves, shading devices, glazings, jambs, …)
• Space geometry (length, width, height of room)
• Surface reflectances (of ceiling, walls, …)
• The illuminated thing (task, surface, …)
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 14
Daylighting System Components
• Source (the sky not direct solar)– On a macro scale this resource is a function of
geographic locale and site conditions
• Apertures (openings)– Are a function of design decisions (placement in
building, size, number, orientation)
• Aperture modifications (lightshelves, shading devices, glazings, …)– Are a function of design decisions
the site presents an opportunity that the designer can run with
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 15
Daylighting System Components
• Space geometry– Is a function of design decisions
optimize space layout and use the space itself to help distribute light
• Reflectances – Are function of design decisions use
reflective surface finishes to spread light
• Illuminated thing (task, surface, …)– A function of space type and usage
… good daylighting design is good architectural design
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 16
More on Daylighting Glazing
• Glazing location (orientation, tilt, surroundings) is important
• Glazing area and DF are related in a generally linear manner
• Usually, daylighting glazing should have a high VT (visible transmittance) and a low SHGC (solar heat gain coefficient)—characteristics that will be incompatible in many products
• Generally daylighting should involve no direct solar radiation (provide shading devices to ensure this without blocking diffuse daylight)
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 17
More on Lightshelves
These elements are used with daylighting windows to more evenly distribute daylight in a space; they do not substantially increase the amount of daylight that is captured
– They can be external, internal, or both
– When used, they split a window area into “view” and “non-view” components
– They can assist with shading against direct solar radiation (thus reducing heat gain and glare)
– Performance is not well documented—lightshelf design is more an art than a science
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 18
Lightshelves
Inland Revenue (UK), image from LBL
exterior lightshelves, Milwaukee, winter
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 19
Philips Exeter Academy, Exeter, NH; Library, Louis Kahn (1967)
campus contextbuilding context
Daylighting Example
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 20
building massing
façade texture and layers
Philips Exeter Academy
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 21
reading carrels and lounge area
Philips Exeter Academy
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 22
grand entry staircase and structure
Philips Exeter Academy
note difference in “warmth” of light
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 23
various views of structure (contrast of wood and concrete)
Philips Exeter Academy
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 24
views up into central volume, showing minimal toplighting and smoke vents
Philips Exeter Academy
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 25
bookshelf engages structure
user of stair engages structure
Philips Exeter Academy
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 26
exterior courtyard (note vegetative shading) meeting room
Kimbell Art Museum, Dallas, TX; Louis Kahn (1972)
Daylighting Example
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 27
images from: http://www.kimbellart.org/
exterior view
gallery interior
Kimbell Art Museum
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 28
images from: http://www.kimbellart.org/
gallery interiordaylighting fixture
Kimbell Art Museum
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 29
images from: http://www.kimbellart.org/
gallery open to courtyardexterior view
Kimbell Art Museum
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 30
Emerald People’s Utility District Offices, Eugene, OR; Equinox Design
south façade with fixedand vegetative shading
Daylighting Example
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 31
lightshelf
north façade, note glazing, no shading
Emerald People’s Utility District Offices
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 32
south façade, note fabric shading devices
Emerald People’s Utility District Offices
break room, note direct solar infusion
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 33
it takes more than an aperture to make a daylighting system
skylight, unnamed architecture building (think about maintenance)
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 34
Phoenix Convention Center
some serious external shading shading, more and less, from glass
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 35
Why CarbonDioxide Matters
http://img257.imageshack.us/i/3way8fp.png/
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Ball State Architecture | ENVIRONMENTAL SYSTEMS 1 | Grondzik 36
Why Reducing Carbon Emissions Matters
http://www.msnbc.msn.com/id/9527485/
Fall 1979 Fall 2005