Green Building Design in CA What is it? How to do it? Specifics to California? Presented by:...

Green Building Design in CA

What is it?How to do it?Specifics to California?

Presented by: McParlane & Associates

Your Speakers for Today

Jorge Torres CotoSustainable Engineering Coordinator

McParlane & Associates, [email protected]

Brought to you by

McParlane & Associates, Inc.

What is Green Building?

Green or sustainable building is the practice of creating healthier and more resource efficient models of construction, renovation, operation, maintenance and demolition.

(U.S. EPA) Design Team is RESOURCE MANAGER

– Energy (influent & effluent)– Water (influent & effluent)– Materials (influent & effluent)– Waste– Embodied energy– Etc.

Why Build Green?

BECAUSE IT IS THE RIGHT THING TO DO! 5% to 10% of the market is going green 20% to 30% increase per year in green building

marketplace (data from 2005 and 2006) Decreased operating costs (10% approximately) Increased ROI (2% investment may yield 20% LCC)

The market’s growing

How to measure Green Buildings?

National Guidelines– Leadership for Energy and Environmental Design

(LEED) United States Green Building Council (USGBC)

– Green Globes Green Building Initiative

Want to get certified?

LEED Accredited Professional– USGBC (www.usgbc.org)

Certified Green Building Engineer

– AEE (www.aeecenter.org)

BPI Certified Professional– BPI (www.bpi.org)

Certified Green Building Professional

– Build it Green (www.builditgreen.org)

Want to certify your building?

Green Globes– Straight forward approach.– Performance driven.– Big in Residential, catching on in Commercial.– Inexpensive.

LEED– Tons of paperwork.– Mix of prescriptive and performance.– Wide acceptance.– Costly.

What works in California?

Beware of all the promises– The grass is not always greener on the other side

We have two basic regions in CA:– Northern CA (lots of rain)– Southern CA (little rain)

We have many regional climate zones– Coastal (mild & humid)– Mountain (dry with extremes)– Desert, etc.

The basics are easy in California

Location, Location, Location!!!

SAN DIEGO (13°F)

SAN FRANCISCO (14°F)


SAN BERNARDINO (39°F)

REDDING (30°F)


MOJAVE (35°F)

DEATH VALLEY (28°F)

The Big Picture!

http://www.placemakers.com/smartcode/3000-00-Clean_SmartCodev8.0.pdf

http://www.smartcodecomplete.com

What do we have to offer?

PASSIVE SYSTEMS– Slower reaction time– Good for flat daily range– Rooms constant loads:

Occupants Lighting Equipment Solar

ACTIVE SYSTEMS– Faster reaction time– Higher degree of daily range– Rooms with varying loads:

Meeting / Conference rooms Cycling equipment

Gimmes and No-Brainers

High Efficiency Anything– HVAC equipment– Glazing

LSG=VLT/SHGC

– Insulation– Plumbing Fixtures– Lighting (controls)– Motors– Etc.


EXTERNAL SOLAR SHADING– NoCAL & SoCAL– Reduce heat gain and glare by

adding fins above windows or glass.

– Up to 35% energy savings on cooling load.

– New construction or renovation– Ideal for buildings that don’t

allow for high performance glazing and/or south facing glass.


XERISCAPE– NoCAL & SoCAL– Landscaping with smart plant

choices and grouping according to water needs and sun and moisture conditions.

– Reduction in water use by up to 60%.

– New construction and renovation.

– Easy to achieve in southwest with native plants, since they require little water.

http://pubs.caes.uga.edu/caespubs/pubcd/B1073.htm


GEOTHERMAL– NoCAL & SoCAL– Utilizes thermal stability of

ground to act as a heat source in winter and heat sink in summer.

– Energy can be reduced 25% to 50% for heating and cooling.


– Hard to find the right ground condition and location.


GARDEN ROOFS– NoCAL & SoCAL– Vegetated roofs.– Can reduce heating and

cooling by at least 5%.– New construction and

renovation.– Can double the life of a roof.

Can reduce storm water runoff by 50%.


VEGETATIVE WIND BREAKS– NoCAL & SoCAL– Control of dust and wind by

planting sturdy (low water consuming) trees/plants that will stand-up to brutal weather.

– Can reduce winter heating cost by 40%, summer cooling by 50%.


– Make sure they don’t interfere with line of sight or passive solar systems.


CROSS VENTILATION– NoCAL & SoCAL– Utilizes pressure differentials to

move air through a building, with air flowing through windows, doorways, across rooms, etc.

– Savings range from 5 to 20%.– New construction. Renovation

may be difficult due to window location, orientation, etc.

– Works best when maximum building depth is 49 ft. or less and air source is clean.

http://www.wbdg.org/ccb/DOD/UFC/ufc_3_440_06n.pdf


NIGHT COOLING– NoCAL & SoCAL– Flushing cool air at night

through a building.– Savings range from 5 to 17%.– New construction. Renovation

may be difficult due to window location, orientation, etc.

– Works best in climates with diurnal swing of 20°F or higher and building with traditional hour of occupancy.


DAYLIGHTING– NoCAL & SoCAL– Use natural light.– Lighting energy can be cut

75% to 80%. – New construction or

renovation (orientation may be obstacle).

– Challenging in very sunny climates due to glare.

http://btech.lbl.gov/pub/designguide/dlg.pdf


MIXED-MODE VENTILATION– NoCAL & SoCAL– Combination of natural and

mechanical ventilation and cooling.

– Savings from 5% to 20%. – New construction or renovation.– Ideal for older, naturally

ventilated buildings with increased internal loads due to higher occupancy or equipment loads.

http://repositories.cdlib.org/cgi/viewcontent.cgi?article=1091&context=cedr/cbe


PASSIVE STACK VENTILATION– NoCAL & SoCAL– Combination of cross ventilation,

rising warm air, and venturi effect to circulate air through a building without fans.

– Savings from 5% to 20%. – New construction or renovation

(depends on existing floor plate).– Works best in smaller buildings,

4-stories or less.


PASSIVE SOLAR HEATING– SOUTHERN CALIFORNIA– Integrated design of walls,

windows and building materials to provide solar collection and heat storage/distribution.

– 5% up to 75% reduction of heating requirements.

– New construction– Best in small buildings. High

solar heat gain (0.55 SHGC or more) low-e coatings in cold climate.

http://www.wbdg.org/ccb/AF/AFH/pshbk_v1.pdf http://www.wbdg.org/ccb/DOD/UFC/ufc_3_440_03n.pdfhttp://www.greenbuilder.com/sourcebook/PassSolGuide1-2.html


EVAPORATIVE COOLING– SOUTHERN CALIFORNIA– Utilizes water to extract heat

from airflow.– Can use only 10% of the

energy and air conditioner would.


– It can meet total cooling load. Or be combined with air conditioning for more extreme

loads.

http://www.energy.ca.gov/reports/2004-04-07_500-04-016_AT1.PDF


SOLAR WATER HEATING– SOUTHERN CALIFORNIA– Absorbs sunlight and transfers

it to the fluid to be utilized.– Can provide up to 80% of hot

water needs with minimal O&M– New construction or renovation– A sunny climate helps, but not

required.

http://www.wbdg.org/design/swheating.php


WIND POWER– SOUTHERN CALIFORNIA– Conversion of wind to

electricity– Saving depend on many

factors (type of turbine, on-site, off-site, etc.)


– Rural and/or flat locations are best. Placing turbines near tall buildings isn’t recommended.


PHOTOVOLTAICS– SOUTHERN CALIFORNIA– Conversion of sun to electricity– Savings depend on many

factors.– New construction and

renovation.– Payback and aesthetics are the

biggest obstacles.

http://www.wbdg.org/ccb/DOE/TECH/sand7023.pdf


ENERGY RECOVERY VENTILATION

– NORTHERN CALIFORNIA– Reclaiming of energy from

heated / cooled exhaust air that is transferred to fresh air coming into building.

– Hard to calculate savings, but paybacks range from months to 3 years.


– In mild climates the system fan energy might be more than the energy savings provided.


RAINWATER HARVESTING– NORTHERN CALIFORNIA– Collection and storage of rain

from roofs or other surface.– Possible savings of 40% water

usage. 10 to 15 yr payback.– New construction or

renovation. – Tall buildings will collect less

debris. Building 3-stories or less may require screens, etc.

What to watch out for in California?

DISPLACEMENT VENTILATION

– Utilizes buoyancy forces (generated by people, lighting, computers, etc.) to move contaminants and heat from the occupied zone to the return/exhaust grilles.

– Cooling energy savings of 30% to 50%.

– New construction or renovation.– Requires higher ceilings, best for

schools and open offices.

http://www.archenergy.com/ieq-k12/Public/Proj4_Deliverables/D4.2j1_AppGuidelinesforDV_2006-0522.dochttp://www.cibse.org/pdfs/David%20Butler.pdf

What to watch out for in California?

RADIANT HEATING / COOLING

– Relies primarily on radiation. Hot or cold water radiated through floor or ceiling panels

– Ventilation savings of 30% to 50%. Synergy with displacement ventilation.

– New construction or renovation.– Auxiliary air conditioning system

may be required. Higher cost than conventional air system. Requires tight energy efficient envelope. Low internal and external load gains.

Open Forum

Questions?Comments?Complaints?Praises?

THANK YOU

McParlane & Associates, Inc.4619 Viewridge Avenue, Suite CSan Diego, CA [email protected]

Green Building Design in CA What is it? How to do it? Specifics to California? Presented by:...

Documents

Transcript of Green Building Design in CA What is it? How to do it? Specifics to California? Presented by:...