Closing the Loop - iapmo.org - Cejudo... · • Larger Plumbing Chases • Specify Equipment...
Transcript of Closing the Loop - iapmo.org - Cejudo... · • Larger Plumbing Chases • Specify Equipment...
Closing the Loop
May 15, 2018Presented to the Sixth Emerging Water Technology Symposium by Carmen Cejudo, PE, PAE
Approaches to Net Zero Water
“To be sustainable our culture must function as a mature ecosystem.”
- Toby Hemenway, Author of Gaia’s Garden
Thermoelectic Power41.5%
Irrigation 37%
Aquaculture 2.6%
Industrial 5%Domestic
8.5%
Other Publically Supplied Uses 5.4%
US Water Use
Water Cleaning & Transportation 19%
End Use 81%
California Water Related Energy Use
End use 81%
Energy & Water Nexus
CEC 2005 Report
Top Causes of Pollution in Rivers and Streams
Agriculture 22%
Hydromodification14%
Unknown 11%Habitat
Alteration 10%Natural/Wildlife 9%
Sewage/Municipal Discharges 8%
Unspecified Nonpoint8%
Atmospheric Deposition 6%
Resource Extraction 5%
Urban Runoff/ Stormwater 5%
Construction Sites0.15%
Analyze the Ecosystem
Rain income – average yearly rainfall
38
11
36
20
12
47
0
5
10
15
20
25
30
35
40
45
50
Seattle Tucson Portland San Francisco Los Angeles New York
In
ch
es
Nature’s Water Budget
6.93
4.22
4.67
3.263.09
1.77
0.520.79
1.48
3.56
6.86
7.9
0
1
2
3
4
5
6
7
8
9
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Averag
e R
ain
fall (
in.)
Inches of Monthly Average Rainfall for Portland
Reduce Water Use
How we use water
Toilet 44%
Laundry
20%
Bath /
Shower 31%
Drinking /
Cooking 5%
Typical Household Water Use
Washing &
Others 28%
Cooling
Towers 31%
Garden /
Landscaping
4%
Toilet 37%
Office Building Water Use
Architect: NBBJ
Large Scale Urban Development
Scale Jumping Impacts for Retail Water Usage
OFFICE USAGE TO ROOF AREA NEEDED RETAIL TO ROOF AREA NEEDED
Roof area needed:~180,000 sf
Roof area needed:~1,000,000 sf
WATER- Efficient Fixtures- 20% Saved
STATS - Hospital- 155,000 sf- Two Floors
BENCHMARKS- Pursuing LEED Gold- LEED fundamental and enhanced commissioning
FEATURES- Built to operating
room standards- LED lighting- Daylight harvesting- HVAC heat and
recovery evaporative cooling
ENERGY - 20% Saved
“Our desire is to open a wedge into the future so that we, and others can see what is possible in a contemporary office building. “ - Denis Hayes Bullitt Foundation, President
Lessons Learned• Elevated tank required
• Must filter to a smaller size than the percolation holes.
• Concentration rises in the summer.
Greywater Treatment
Composting Toilet System
Lessons Learned• Larger Plumbing
Chases • Specify Equipment
Designed for the Application
•Evenly distribute load •Excess leachate is an issue for overloaded equipment•Anticipate Post-Construction Changes
Potable Rainwater
Lessons learned
Anticipate long regulatory process
Work with reviewer early in the project
Required to become a water district
Verify Performance
Metering:
−Total hot water use
−Total water use
−Tenant water use
−Cistern levels
Creating a better environment
Carmen Cejudo, PE, LEED AP
Project Manager
206.596.8606
1501 E Madison Street, Suite 300Seattle, WA 98122