HomeMy WebLinkAboutCCWG Energy Green Building Presentation 8-13-2007Energy Efficiency and
Green Buildings
Climate Change Working Group
Monday, August 13, 2007
Presented by Cesar Rios
ECM Networks, Inc.
Energy Efficiency &
Regulations
Early 80’s – CA Title 24 – Energy Code
Reaction to post energy crisis – increased consumption, trends
Energy budget based – Residential and Non-Res (Btu/Sq
Ft./Year)
Evolved from self-policed to City/State plan checkers
Originally focused on heating, building shell to most end-uses
As technology advances Title 24 evolves (and vice versa)
Now CA leader in energy reductions, technology
Opportunities to improve – passive designs, residential, plug loads
CA Title-24 – from regressive to revered
Energy Efficiency & Gov’t
ENERGY STAR
Developed by EPA in 1992 to label and promote energy-efficient
products and reduce GHG
Started with computers and monitors
1996, partnered w/DOE to develop expanded product catalog
Early attempt to brand buildings only successful w/Gov’t buildings
Current product catalog covers variety of products
Label now covers new homes, commercial and industrial buildings
Credited w/LED traffic signs, T8’s, energy controls, standby power
National focus has created some regional/local issues
Innovation and good intentions have created powerful branding
Energy Efficiency
Measures - Lighting
T12 - T8 lamps, magnetic to electronic ballasts (30-
50% savings)
huge market: Minimal incremental costs
Incandescent to CFLs (up to 75% savings)
huge market: Rebates reduce incremental costs
Incandescent to LEDs (up to 90% savings)
traffic signals, exit signs, specialty lighting
High Pressure Sodium (up to 40% savings)
High bay and outdoor lighting i.e. Costco, Home Depot
Low hanging fruit already harvested
Energy Efficiency
Measures - Controls
Occupancy Sensors
Room and task lighting, computers, appliances, vending machines, power
strips, water using equipment
Programmable Thermostats
Heating and cooling, fan controls, windows
Photocells/Daylighting
Outdoor lights, indoor lights w/ambient lighting
Energy Management Systems
Computerized Controls for all end-uses
Variable Frequency Drives (VFD)
‘Dimmers’ on motors, pumps, compressors, fans
Effective but savings are notoriously difficult to quantify
Energy Efficiency Measures –
HVAC, Building Shell
Energy efficient air conditioners
High EER and SEER units
Incremental costs shrinking
Multi-unequal size compressors, screw compressors
Expensive, specialized equipment
Evaporative pre-coolers, condensers
High maintenance, increased water consumption
Green/Reflective/Cool roofs
Reflect suns energy away from building
Increase roof insulation factor
Integrated rain harvesting system
Cost effective when replacing existing roof
Reflective window film
Film can be effective from clear to completely reflective
Good candidate for Chula Vista businesses
Plenty of opportunity for older buildings
What is a Green Building?
Green building is the practice of increasing the
efficiency with which buildings and their sites
use and harvest energy, water, and materials,
and reducing building impacts on human health
and the environment, through better siting,
design, construction, operation, maintenance,
and removal; the complete building life cycle.
en.wikipedia.org/wiki/Green_building
Subjective not objective
Why Build Green?
Green design emphasizes a number of new
environmental, resource and occupant health
concerns:
Reduce human exposure to noxious materials.
Conserve non-renewable energy and scarce materials.
Minimize life-cycle ecological impact of energy and materials
used.
Use renewable energy and materials that are sustainably
harvested.
Protect and restore local air, water, soils, flora and fauna.
Support pedestrians, bicycles, mass transit and other
alternatives to fossil-fueled vehicles.
Test
U.S. Building
Impacts:
12%
Water Use
30%
Greenhouse
Gas Emissions
65%
Waste
Output
70%
Electricity
Consumption
Why Build Green?
Buildings are major contributors to this consumption and waste:
Buildings consume ~40% of total annual U.S. energy use.
Production of this energy emits ~100 million tons of carbon
dioxide.
Most existing air-conditioned buildings use chlorofluorocarbon
refrigerants, which have been implicated in destruction of the
ozone layer.
American homes each use between 10,000 and 40,000 gallons of
water per year.
Construction of the average home creates ~2.5 tons of waste;
demolition produces ~20 tons, of which most goes to landfills.
What is LEED?
U.S. Green Building Council’s (USGBC)
Leadership in Energy and
Environmental Design (LEED)
LEED is a Green Building Rating
System™
The nationally accepted benchmark for
the design, construction, and operation of
high performance green buildings.
Test
Average
Savings of
Green
Buildings
ENERGY
SAVINGS
30%
CARBON
SAVINGS
35%
WATER
USE
SAVINGS
30-50%
WASTE
COST
SAVINGS
50-90%
Source:
Capital E
Test
What is the
LEED System?
LEADERSHIP in
ENERGY and
ENVIRONMENTAL
DESIGN
A leading-edge
system for
certifying
DESIGN,
CONSTRUCTION,
& OPERATIONS
of the greenest
buildings in the
world
Scores are tallied for
different aspects of
efficiency and design
in appropriate
categories.
For instance, LEED
assesses in detail:
1. Site Planning
2. Water Management
3. Energy Management
4. Material Use
5. Indoor
Environmental
Air Quality
6. Innovation &
Design Process
What is LEED?
Test
Levels of
LEED
Ratings
Green Buildings
worldwide are certified
with a voluntary,
consensus-based
rating system.
USGBC has four
levels of LEED.
LEED, Why not make all
buildings comply?
Currently not designed for existing
building improvements
Not applicable for industrial buildings
Currently piloting residential program
Extensive (and expensive) certification
process for smaller buildings
Certification congestion can impact
construction schedules
Not a one-size fits all approach
Test
LEED for new construction
buildings
Distribution
by geography
1-19
20-49
50-99
100-199
200+
9 4
9 11 11
69
125
25 82
40 28 14
8
134
186 480
22
23
57
19
6
6
18
73
102 22
11
19
120 79
119 36
52
74
95
173
174 33
105
61 27
12
9 (DE) 38 (DC)
23 (DE)
24 (NH)
5 (OK)
4
68 AK=10
HI=16
PR=1
as of 07/06
In Summary
Early Vision and Leadership
Difficult decisions have resulted in tremendous
progress for California
Human ingenuity has advanced beyond
regulation
Americans adapt and thrive
Government can be innovative
Continuous improvement has been key to
success