adlo lepold legacy center

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The Aldo Leopold Legacy Centre


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The Aldo Leopold Legacy Centre is the first net zero energy building and

the first carbon neutral building certified by LEED.

The Leopold Centre has received Platinum LEED Certification from the

U.S. Green Building Council

The centre will produce approximately 115% of annual building energyneeds.

Designed by The Kubala Washatko Architects Inc

The Leopold Centre helps us to envision how we can use energy more

efficiently and develop positive relationships to other people and the planet.

The Aldo Leopold Centre should be one of 20 newly constructed Platinum


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The project team used crushed gravel in place of blacktop

or concrete paving, increasing rainwater infiltration andblending the developed areas into the surrounding

landscape.

The native landscaping requires no irrigation. Waterless

urinals, dual-flush toilets, and efficient faucets reduce

water consumption by 65%.

An on-site well provides potable

water, and an existing septicsystem treats wastewater.

The recycled stone aqueduct shown on the left funnels

rainwater into a rain garden and provides a focal point

for the exterior courtyard.


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precipitation managed on site: 100%

Total water used indoors:

40,492 gal/yr

Total water used

outdoors: 0 gal/yr percent of total water from reclaimed sources:

0%

percent wastewater reused on-site: 0% Calculated annual potable water use: 3.41

gal/sf/yr


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Approximately 90,000 board feet of site-harvested lumber was

milled and dried locally for window frames, doors,

siding, flooring, paneling, and artisan-crafted

furniture.

pine trees were debarked on-site,

air-dried, and used to

construct innovative round

wood rafters and trusses.

nearly all of the Legacy Centers timber skeleton was built with Leopold pines.

The Leopold Foundation secured Forest stewardship Council (FsC) chain-of-

custody

certification for its own wood through the smartwood certification body.


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Materials with recycled content were used throughout the project.

The roof includes high levels of recycled aluminum, for

example, and the concrete has flyash in place of much

of the portland cement.

The rainwater aqueduct and fireplace were made of

stone reclaimed from an airplane hanger built by the

Civilian Conservation Corps in the 1930s.

The project team also preferred local and regional materials; interior walls were

plastered with local sand, clay, and straw, and 60% of all materials, by cost, were

manufactured

within 500 miles of the project site.

The Aldo Leopold Foundation used waste pulp generated by

Leopold pines to print a special edition of A sand County Almanac

on archival-quality paper made through an experimental pulpingprocess that used no chlorine or sulfur.


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at 3 PM

at 12 PM

at 9 PM

n

s

w e

June 21

December 21


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May sun angle

November sun angle

: 43 to -40 degrees

Celsius

Tempered fresh air : earth tub

Heating and cooling system: radia


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Unique features of this system is the use of radiant cooling

along with radiant heating.Systems in the United States have typically used radiantpanels only for heating because cooling requires that the

relative humidity be monitored and cooling turned off when it

exceeds a threshold.

Concrete slabs

internal tubing

mixture of a food grade

glycol, a safe, vegetable

based substance

( prevent the water from freezing

inside the tubes )


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Installation of plastic tubes

Laid plastic tube system

Concrete is

carefully

smoothed over

the

plastic tube

system

Concrete

poured

over

tubing to

form

floor

4 thick

sheets

of rigid

styrofoam

insulation islaid first


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Heat

Glycol mixture

Dissipate heat

In summer

Absorb heat

In winter

Geothermal wells

(220 ft below earths surface)

Hot water

Flows through exhibition

hall, office area and

The system uses variable speed pumps

to provide only

the necessary flow. As each zones reach

the desired temperature, it will be

turned off and the pump will be slowed

down to conserve even more energy.


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Zero Energy Building


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Zero Energy Building The AldoLeopold Legacy

Center is a carbon-neutral,net zero energy building (ZEB).

Because of the efficient

building techniques used,

the Legacy Centerrequiresvery little energy.

The Legacy Centers39.6-kW rooftop

photovoltaic (PV) array produces

roughly 10% more than the energyneeded to operate the building over

the course of a year. (i.e 110%)

This excess renewable energy,offsets the

greenhouse gas emissions resulting fromthe project's operations.


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Daylighting eliminates the need for electriclighting during most of the day.

Ground-source heat pumps connected to a radiant slab

provide heating and cooling. Carefullyselected HVAC system equipment, lighting, computers, andappliances further conserve energy.

The separation of ventilation systems from heating andcooling systems, which results in a savings of two to five times theamount of energy used by a combined system.

Ventilation-system energy

consumption has been further

reduced at the Leopold Center

through the use ofburied earth

tubes on the site, which allow

preheating of ventilation air during

winter and precooling during

summer before the air enters thebuilding.


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The Foundation located the project on

a previously disturbed site.

Crushed gravel is used in place of blacktop or concretepaving, increasing rainwater infiltration and blending the developed

areas into the surrounding landscape.

T he native

landscaping requires no irrigation.Waterless urinals, dual-flush toilets, and efficient faucets reduce

water consumption by 65%.

60% of all materials were manufactured within

500 miles of the project site.

The Legacy Center was

designed to use 70% less

energy than a comparableconventional building. A

39.6-kW rooftop photovoltaic

array produces more than

110% of the project's annualelectricity needs.


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The reserve, originally planted by the Leopold family

suffered from overcrowding.

A strategic thinning process not only would reduce the chance ofcatastrophic fire and insect damage, but also would provide an

abundance of raw material with which to build.

The team designed parking

pockets with shaded areas to

reduce the project's contributionto the urban heat-island effect

and designed parking areas and

roadways to circulate aroundexisting trees.

The site's geology,

including more than 300

feet of sand, encourages

natural percolation of

rainwater.


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The most lasting achievement of the Legacy Center will be its

strict adherence to a holistic design process consistent with Leopold's

understanding of ecological systems.

Combines both Technology and the historic knowledge about how to

create comfortable, durable buildings with low-tech, low-energy, but

highly intelligent solutions in a beautiful and functional space.

From the start of the schematic design phase through construction, the

project-team meetings included the environmental consultant, the

energy-simulation consultant, commissioning agent, and

control-system consultant.

Design


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At the time of construction, the center met Architecture 2030

Challenge goals and was

designed to consume zero net energy.

Long, narrow floor plates - optimum

natural ventilation and daylight.

The building overhangs - shield sun in the summer and

allow passive gain in the winter.

The roof - bounce indirect natural light into the interior, reducing

the need for electric lighting, and water is preheated by a roof-mounted

evacuated tube solar array.

The pure sand has made excavation faster and easier, and can still be

compacted enough to form an adequate building surface.


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A particularly unique system is a set of earth tubes designed to ventilate the

building.

An integral part of the HVAC system for heating and cooling the building,

they were installed underneath the foundation in the construction.

The Legacy Center, the incoming air will travel through a series of

underground concrete tubes, taking on the temperature of the earth.

Compared to the extreme outdoor temperatures ranging from20 to

95,the air in the earth tubes after traveling though the system will have a

minimum temperature of 17 and a maximum temperature of 74.

The earth tubes are made of a series of connected pieces of 24 diameter

concrete pipe.


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The sections are connected with a rubber gasket to prevent gases in thesoil from leaching.

The pipe itself is permeable enough to allow evaporation of any water.

When the building is complete, it will be between 10 and 12below theground surface.

The pipes are connected at one end to a larger vertical pipe that will extendabove ground and

serve as the air intake.

In the finished system, a metal roof and the sides will be enclosed withmesh to prevent of

insects.

At the other end, the maze of pipes is connected to the basement of thebuilding, where the air will go

through a filter and UV lamp to eliminate mold and bacteria before beingheated or cooled and circulated throughout the building


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Low-VOC Acrylic Latex Interior Paint

Photovoltaic Collectors

Recycled-Content Cellulose Insulation

Structural Insulated Panels

Urea-Formaldehyde-Free

Particleboard

Waterless Urinals

Zero-VOC and Low-VOC Interior

Paints

Measured by weight, 95% of

construction waste was recycled.


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Use materials with integral finish

Cluster buildings to minimizeinfrastructure requirements

Consider the use of structural

materials that do not require

application of finish layers

Control rainwater flowing on

building surfaces

Use wood products from

independently certified, well-managed forests for rough

carpentry

Specify wood flooring from

independently certified forestry

operationsUse wood products from


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The building uses an innovative approach to energy management

to create a net zero energy building.

The buildings performance has so far matched the modeling, which

projects that the building will actually produce more energy than isconsumed on an annual basis.

This landmark net zero performance is rooted in fairly old-

fashioned ideas--like maximizing insulation and capturing daylight

and natural breezes--as well as advanced technologies that harvest

the huge energy resources of the sun and the earth.

The building incorporates a geothermal heat exchanger used in the

water-based heating system.

The system uses the earth's stable temperature to pre-heat or pre-

cool water relative to the air temperatureThe ground is always about 55 degrees Fahrenheit, so in the

summer air brought into the building will already be cooler than the

surrounding air and in the winter it will already be warmed

In many ways the legacy centre is a ultimate smart building.


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