climate engineering - iuav.it

Climate Engineering Transatlantic PerspectivesSlide 1

highly efficientrun around heat recovery system

waterfall and water dispersion for humidification

heat recovered from exhaustwith supplemental heating inper module air handling unit

per floor air handling units

solar preheating of fresh air

distribution viasubfloor plenum

perimeter outlets

Climate Engineering:Locally Tailored Solutionsfor Environmental Control

Transatlantic Perspectives on Energy Efficient Architecture in Germany and the USChicago, November 27, 2007D. White

Climate Engineering Transatlantic PerspectivesSlide 2Company Organization

Stuttgart(28)

Munich(6)

New York(2)

Climate Engineering Transatlantic PerspectivesSlide 3Working Method: Climate Analysis

Solar radiation and temperature

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heigth: 10 m; wind velocity profile exponent: 0.22 Tamb >-50°C

Climate Engineering Transatlantic PerspectivesSlide 4Physical Phenomena

Conduction

Convection

Stratification

Evaporation

Transmission / Reflection

Heat radiation


heat radiation

air velocityturbulence

activityclothing

daylight quality solar radiationheat / light

indoor airquality

air temperaturehumidity

•Air temperature•Humidity•Radiant Temperature•Air Velocity

•Solar radiation•Activity•Clothing

Influences on Comfort

Climate Engineering Transatlantic PerspectivesSlide 6Working Method

Structuralengineer

Climate engineer

Architect

Client

MEP engineer

Posttower Bonn

Project data:

Height: 162,50 m

Length: 82 m

Width: 41 m

Storeys above ground: 40

Storeys underground: 5

Working places: 2 000

NFA high rise: 60 000 m²

NFA additional building: 6 400 m²

TRANSPARENT ELEMENTS - Glass - single glazing - 1900

U-Value =5.2 - 5.8 W/m2K

R-value = 1

TL = 85% SHGC = 75%

Daylight transmission Solar heat gain coefficient

TRANSPARENT ELEMENTS - Glass - double glazing

U-Value =2.8-3.0 W/m2K

R-value = 2

50%

50%

TL = 79% SHGC = 70%


TRANSPARENT ELEMENTS - Glass - with low-e and gas filling - 2000

U-Value = 1.3-1.8 W/m2K

R-value = 4 - 3

TL = 66% SHGC = 35%


TRANSPARENT ELEMENTS - Glass - screen wall facades

TL = 8 - 65% SHGC = 5 - 50%

U-Value = 0.6 - 1.0 W/m2K

R-value = 5 +


Shading device in the double facade independent of wind speedNatural ventilation to extract absorbed solar gains in the double facadeIndividual cooling of fresh air Concrete slab cooling with Rhine water as natural sourceHigher comfort due to cooler surface temperatures Night-time flushing with cold air to activate the building mass

Energy and ClimateConcept: Summertime

Headquarter Deutsche Post AG, Bonn

Energy source through 2 ground water wells

30 m

Rhein

13°C

18°C

4 pipe supply for decentralized units for simultaneous heating/cooling

sprinkler

Raised floor

heating cooling

Posttower Bonn

Decentralized ventilation unit with individual control of air temperature and air changes

• basic air change 1.5 AC/h

• operating only when room used

• reduced air change ratein winter

• sound reduction of 42 dBa

• noise level < 30 dBa

• low pressure drop

Schalldämpfer Oberteil(seitlich eingehängt)

Schalldämpfer Unterteil(mit Wanne verbunden)

Konvektor

Luftf

ilter

inSc

hien

enfü

hrun

g

Filter Convector

Decentralized air supply system

ATH2002

Deutsche Post view from North-East

ATH2002


Manitoba Hydro New Downtown Office, WinnipegKuwabara Payne McKenna Blumberg

Climate Engineering Transatlantic PerspectivesSlide 26Climate Analysis: Temperature

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Climate Engineering Transatlantic PerspectivesSlide 27Climate Analysis: Humidity

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Climate Engineering Transatlantic PerspectivesSlide 28Climate Analysis: Solar Radiation

Solar radiation and temperature

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Toronto average Winnipeg average Winnipeg clear day Winnipeg temperature

Climate Engineering Transatlantic PerspectivesSlide 29Climate Concept: Winter

highly efficientrun around heat recovery system

waterfall and water dispersion for humidification

4°C exhaust air for parkade ventilation and heating

exhaust air via north atriuminto exhaust chimney

heat recovered from exhaustwith supplemental heating inper module air handling unit

per floor air handling units

solar preheating of fresh air

distribution viasubfloor plenum

perimeter outlets

Climate Engineering Transatlantic PerspectivesSlide 30South Atrium Winter Conditions

South atriumtemperatures and solar radiation

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outside air temperature atrium air temperature min comfort temp, radiation adjusted

facade frame inner surface temp solar radiation on south facade

Climate Engineering Transatlantic PerspectivesSlide 31Climate Concept: Winter

facade cavity(min 4°C)

pressurized floor plenumfor fresh air distribution

displacement ventilation outlet supply temp. 18 - 22°C

radiant slab heating

exhaust air to north atrium/solar chimney

minimal slab heatingto prevent frostduring extreme cold

gas filled, low-e double glazing (1.35 W/m²K)with high light transmission

passive solar gains

office space22°C

inner facadesingle glazed w/ low-ecoating

internal blind

Climate Engineering Transatlantic PerspectivesSlide 32Climate Concept: Summer

openings for fresh air supply and cooling of south atrium

distribution via subfloor plenum per floor air handling

units for fresh air cooling and distribution

perimeter outlets

chilled water for dehumidification and cooling

solar gainsaugment stack effectin chimney

solar gains ventedfrom facade cavity

exhaust air via north atriuminto solar chimney

Climate Engineering Transatlantic PerspectivesSlide 33Climate Concept: Summer

shading devicewith light-redirectingblinds

radiant slab cooling

facade cavity naturally ventilated displacement ventilation outlet

supply temp. 18°C

office space23 - 25 °C

facade cavity(> 30 °C)

pressurized floor plenumfor fresh air distribution


Climate Engineering Transatlantic PerspectivesSlide 34Climate Concept: Spring/Fall

solar gains augmentstack effectin chimney

fresh air intake through outer facade

exhaust air via north atriuminto solar chimney

natural ventilationof south atrium

manually opened windows at inner facade

Climate Engineering Transatlantic PerspectivesSlide 35Climate Concept: Spring/Fall

office space21 - 24 °C


fresh air supply via operable window

facade cavity(12 - 25 °C)


Loyola University Information CommonsSolomon Cordwell Buenz


TMY2 Chicago

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Climate Engineering Transatlantic PerspectivesSlide 38Site

Climate Engineering Transatlantic PerspectivesSlide 39text

Climate Engineering Transatlantic PerspectivesSlide 40Cooling Mode

Climate Engineering Transatlantic PerspectivesSlide 41Hybrid Mode

Climate Engineering Transatlantic PerspectivesSlide 42Natural Mode

Climate Engineering Transatlantic PerspectivesSlide 43Heating Mode

Climate Engineering Transatlantic PerspectivesSlide 44Precast-embedded piping layout

Climate Engineering Transatlantic PerspectivesSlide 45text


Thank You

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