Presentation on theme: "Green Building Design in CA What is it? How to do it? Specifics to California? Presented by: McParlane & Associates."— Presentation transcript:
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 Coto Sustainable Engineering Coordinator McParlane & Associates, Inc. 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 markets 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)www.usgbc.org Certified Green Building Engineer – AEE (www.aeecenter.org)www.aeecenter.org BPI Certified Professional – BPI (www.bpi.org)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)
Location, Location, Location!!! SAN BERNARDINO (39°F) REDDING (30°F)
Location, Location, Location!!! MOJAVE (35°F) DEATH VALLEY (28°F)
The Big Picture!
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.
What works in California? 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 dont allow for high performance glazing and/or south facing glass.
What works in California? 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.
What works in California? 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. – New construction and renovation. – Hard to find the right ground condition and location.
What works in California? 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%.
What works in California? 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%. – New construction and renovation. – Make sure they dont interfere with line of sight or passive solar systems.
What works in California? 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.
What works in California? 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.
What works in California? 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.
What works in California? 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.
What works in California? 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.
What works in California? 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.
What works in California?
EVAPORATIVE COOLING – SOUTHERN CALIFORNIA – Utilizes water to extract heat from airflow. – Can use only 10% of the energy and air conditioner would. – New construction and renovation. – It can meet total cooling load. Or be combined with air conditioning for more extreme loads.
What works in California? 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.
What works in California? WIND POWER – SOUTHERN CALIFORNIA – Conversion of wind to electricity – Saving depend on many factors (type of turbine, on-site, off-site, etc.) – New construction and renovation. – Rural and/or flat locations are best. Placing turbines near tall buildings isnt recommended.
What works in California? PHOTOVOLTAICS – SOUTHERN CALIFORNIA – Conversion of sun to electricity – Savings depend on many factors. – New construction and renovation. – Payback and aesthetics are the biggest obstacles.
What works in California? 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. – New construction and renovation. – In mild climates the system fan energy might be more than the energy savings provided.
What works in California? 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.
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 Viewridge Avenue, Suite C San Diego, CA