CITY OF RALEIGH’S CLIMATE / ENERGY ACTION PLAN
TECHNICAL DOCUMENTATION – VOLUME ONE: PROJECT REPORT
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evaluate any of the CEAP actions. The process can also be applied for capital improvement
projects (CIP) prioritization. The potential strategies evaluated were:
Utilize the Solid Waste Services Department trucks and personnel to collect
recyclables in addition to outdoor solid waste from the City’s parks
Strategy for Conversion to LED Lighting in City Parking Decks
The complete Business Case Evaluations are included in Appendix 2 of the CEAP.
6.5
Raleigh Public Utilities Department Real Time Energy
Management & Operations Optimization (RTEMOO) Project
Under a separate contract between the consulting team and the City of Raleigh PUD, a
feasibility study was conducted to investigate the suitability for the City to use a water
distribution and optimization software solution that could potentially reduce operating
costs by:
Shifting electrical load to maximize use of the lowest cost kWh tariff periods
Preparing proactively for load shedding to minimize peak kW demand charges
Selecting efficient operations of pumps and pump combinations to yield optimal
energy improvements
Selecting the lowest cost source of water
Selecting the lowest cost transport path for water distribution based on system
demands
The feasibility study focused on understanding the complexities, operational requirements
and inherent constraints within the distribution systems operations and determining the
likely benefits that energy management and operations optimization could deliver.
Findings included:
The electric tariff rates in use by the City provide an incentive to shift load from
expensive (e.g., peak) to cheaper (e.g., off-peak) priced electricity periods
The software demonstrated that by effective dynamic operation of the water storage
capacity within the distribution system, cost reduction opportunities were available
The software demonstrated that by selecting the most appropriate pump
combinations to run at any time, possible energy efficiency improvements in the
range of 6 to 8 percent might be achieved without asset changes
A nominal 6 percent reduction in energy use would realize a reduction of 2,550 MWh
or 1,290 tonnes of CO
2
per year
The 2010 annual electricity cost for the studied sites was $3.1 million; a cost reduction
in the range of 10 percent per year might be realized through load shifting
6.6
Comprehensive Fleet Transformation Strategy
One of the top CEAP strategies is Strategy FLT-1-10: Increase City Fleet Alternative Fuel
Vehicles. Under this strategy, the City’s fleet would continue to be replaced with alternative
fuels and/or hybrid vehicles when it is deemed that the optimal life cycle of the existing