1. Energy Efficiency Checklist for IEUA Project Managers
Although IEUA adopted energy management guidelines that
required incorporation of energy efficient best practices in
design and operations. IEUA learned that the success of
attaining this goal had been left to the discretion of
engineering project managers, and not all of these managers were
conversant in energy efficient design options. An energy
efficiency checklist was prepared that directs project managers
to the appropriate specifications. Some of these specifications
are still under development.
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Energy Efficiency Checklist >>> |
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2. Facility Lighting Design
During the course of the CALeep project, IEUA became aware
that one of its wastewater treatment plants was very well lit,
even though the facility was unmanned. This prompted an
investigation that resulted in hiring a lighting consultant to
review IEUA's interior and exterior lighting at its wastewater
treatment plants. The lighting consultant recommended a number
of lighting retrofits with lighting controls that collectively
are estimated to reduce IEUA's energy consumption by 1136 MWh
per year -- an annual savings of $175,975 with an average 5 year
payback.
| Master
Lighting Design Guidelines >>> |
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| Master
Lighting Report >>> |
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| Master
Security Report >>> |
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3. Wastewater Treatment Plant Energy Efficiency Evaluation
Through CALeep, IEUA and its consultants identified a number
of opportunities for increasing wastewater treatment process and
energy efficiency. In addition, opportunities for increased
biogas and cogeneration production were identified. Presently,
SoCalGas is providing design assistance through its "Savings by
Design" program. Projected benefits from these process
improvements are 13,050 MWhrs per year -- an annual savings of
approximately $1.5 million. Actual savings will depend on
acceptance and implementation by IEUA of SoCalGas' "Savings by
Design" final recommendations.
| WWTP EE
Evaluation
>>> |
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4. Geothermal Cooling Evaluation
Consistent with its culture of innovation, IEUA creatively
considers use of every known resource. For the CALeep project,
IEUA decided to evaluate the possibility of geothermal cooling
options for its facilities. The study indicated a potential to
implement geothermal cooling at IEUA's LEED Platinum
Headquarters building that could save 226 MWHrs and $27,000 per
year.
| Geothermal
Cooling Evaluation
>>> |
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5. Recycled Water Energy Analysis
IEUA learned through CALeep that it could collaboratively
develop customized energy efficiency incentives with its
electric utility service provider, SCE, through Standard
Performance Contracts (SPCs). IEUA decided to review its capital
program for potential opportunities to modify new or upgraded
facilities to optimize energy benefits. Through this process,
IEUA identified several opportunities to oversize new and
upgraded pipelines (to reduce friction and increase pumping
efficiency) and to oversize reservoirs. If incentives can be
negotiated with SCE, IEUA may be able to receive authorization
for the incremental capital expenditures needed to attain these
energy benefits (estimated at 12,546 MWh, a potential annual
savings of $1.5 million).
| SCE Sultana
>>> |
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| SCE Etiwanda
1270 >>> |
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| SCE Etiwanda
1430 >>> |
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6. Hydro Turbine Analysis
In its 2005 Integrated Energy Policy Report (IEPR), the
Energy Commission identified energy self sufficiency by water
and wastewater utilities as a very important goal. In addition
to highly efficient systems and processes, the IEPR recommended
that water and wastewater utilities maximize self-production of
energy, especially renewables.
Water and wastewater utilities are the key stakeholders in
production of in-conduit hydropower; yet hydropower production
by wastewater facilities is not a common practice. Through
CALeep, IEUA evaluated the potential for installing
hydro-turbines in gravity and pressure pipelines. IEUA's
consultant recommended that hydro-turbines be considered in
recycled water pipes wherever pressure reducing valves are being
considered. Potential sites were identified on IEUA's system
that total 1625 MWh. If developed, annual savings of $195,060
could be attained.
|
Small Hydro Survey >>> |
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| Resource Map
for Potential Projects (Main) >>> |
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| Resource Map
for Potential Projects (Attachment) >>> |
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| Quantification
of Energy Impacts of IEUA Water Conservation Programs >>> |
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