Green building design
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Green Building Design. Scott Lowe Professor Civil and Environmental Engineering Department Manhattan College. Buildings are Complex Systems !. 1.Site. High density urban. Extreme slope. A Green Site?. Brownfield. Not Green. Pristine land. 2.Foundations.

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Green Building Design

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Green building design

Green Building Design

Scott Lowe

Professor

Civil and Environmental Engineering Department

Manhattan College


Buildings are complex systems

Buildings are Complex Systems !


1 site

1.Site

  • High density urban


Green building design

  • Extreme slope


A green site

A Green Site?

  • Brownfield


Not green

Not Green

  • Pristine land


2 foundations

2.Foundations

  • Building load must be spread out or transferred to rock

  • Footings

  • Piles

  • Caissons


3 frame

3.Frame

  • steel


Green building design

  • Reinforced concrete


Green building design

  • wood


3 electrical

3.Electrical


4 mechanical

4.Mechanical

  • HVAC


5 plumbing

5.Plumbing

  • Water supply

    • Cold water

    • Hot water

  • Wastewater collection

  • Heating pipes

  • Gas

  • Fire system


6 interior

6.Interior

  • floors


Green building design

  • Internal walls

  • Finish – walls/floor


7 exterior

7.Exterior


How green is my building

How Green is my Building?

  • US Green Building Council established the LEED rating system in 1998

  • Leadership in Energy and Environmental Design

  • Points system


Leed system new building

LEED System (New Building)

  • Site (26 pts)

  • Water (10 pts)

  • Energy (35 pts)

  • Materials (14 pts)

  • Indoor Quality (15 pts)

  • Rating out of 100

  • 40-49certified

  • 50-59silver

  • 60-79gold

  • 80+platinum


Leed site example

LEED Site example

  • Bike racks

  • Changing rooms


Leed water example

LEED Water example

  • landscaping


Leed energy example

LEED Energy example

  • Generate energy


Leed materials example

LEED Materials example

  • recycled


Leed indoor quality example

LEED Indoor Quality example

  • Natural light


Energy

Energy

  • Buildings consume massive amounts of energy

  • 40% of all US energy

  • 70% of all US electricity

  • Where is it used?


Sizzling hot energy topics

Sizzling Hot Energy Topics

  • Do it more efficiently

  • Generate your own

  • Keep your heat but

  • Don’t lose your cool


Efficiency

Efficiency

Efficient HVAC systems

  • Use high efficiency systems

  • 90%+ possible

  • High capital cost

  • Will pay this back

  • Not sexy


Create energy

Create Energy

  • Solar - active


Solar passive

Solar - passive

  • Trombe wall


Solar hot water

Solar – hot water


Geothermal

Geothermal

  • ~6 ft below ground the temperature is ~50OF all year

  • Run water pipes through ground

  • In summer hot water enters ground – cool exits

  • Use this to cool air for the HVAC system

  • In winter reverse process


Green building design

Geothermal

Piping

Installation

~6 ft underground


Green building design

Excavation for geothermal pipe field

CEEN201: Green Building Design


Green building design

Geothermal heat exchanger

CEEN201: Green Building Design


Geothermal heat exchanger

Geothermal heat exchanger

CEEN201: Green Building Design


Geothermal lake construction

Geothermal lake construction

Sherman Hospital Illinois

CEEN201: Green Building Design


Keep your heat

Keep Your Heat

  • and don’t lose your cool

  • Insulate, insulate, insulate !!!!!!!!!!!!!!!!!!

  • Biggest bang for your $


Heat transfer 101

Heat Transfer 101

  • Heat moves from hotcold

  • Driven by temp gradient

  • Analogous to fluid flow (high P to low P)

  • And dispersion (high Conc. to low Conc.)


Green building design

Q = A DT

R

Q = heat flow Btu/hr

DT = temp difference oF

A = wall area ft2

R = resistance oF - ft2 / (Btu/hr)


Insulation

Insulation

  • Typical building codes

    • Walls R-19

    • Roofs R-30

  • R values for each layer is added up


R value of a house exterior wall

R Value of a house exterior wall

  • ½” sheetrock + 3 ½ “ insulation + ½” plywood + wood siding + tyvek

  • R = 0.45 + 11 + 0.63 + 0.8 + 0.85

  • R value = 13.73


Windows

Windows

  • Poor insulators

  • Building Code = double pane

  • Leaks are a problem

  • Single pane of ¼” glass, R= 0.9

  • With storm, R=2

  • Double pane ~2

  • Triple pane ~3


Water

Water

  • Water supply

  • Under pressure


Collection system

Collection System

  • Only 1 drainage system

  • Toilets

  • Shower

  • Bath

  • Sinks

  • Laundry

  • Dishwasher

  • Floor drains


Black and grey water

Black and Grey water

Black

Grey

Can be reused but NOT for drinking

Flush toilets, water gardens

Shower

Wash basin

Laundry

  • Can NEVER be reused

  • Goes to sewer system

  • Toilet

  • Kitchen sink

  • Dish washer


Complex to re plumb existing buildings

Complex to re-plumb existing buildings

  • Need to create 2 drainage systems

  • Need to store and distribute grey water

  • Tanks and pumps

  • Clean water back-up in case not enough grey water

  • Etc,etc


Roofs can be green

Roofs can be Green

  • Or black or white or blue


White roof

White Roof


Blue roof

Blue Roof


Green building design

The End

  • Bank Of America Tower

  • 1200 ft tall, 55 floors

  • 2.1 million ft2

  • LEED platinum


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