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Base Line for Energy Conservation, Water Transmission Main – Florida Keys Aqueduct Authority (FKAA)

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The Florida Keys Aqueduct Authority is the sole provider of potable water for all of the residents of the Florida Keys. Potable water is transported from the FKAA Water Treatment Plant (WTP) in Florida City to the Keys through a 130-mile transmission pipeline, installed all the way to Key West.

The water distribution system is an energy intensive process which includes large horsepower pumps at the WTP high service pump stations and at several booster pump stations along the route of the water transmission main. The FKAA's energy bill for water production and distribution can be estimated at 2.5 million per year. Even a 10 percent reduction in the energy usage has a potential of saving up to 250,000 per year in energy cost. Recognizing this potential for savings in the energy cost, FKAA tasked CH2M HILL to evaluate the water distribution pumping systems to establish a “Baseline for Energy Conservation. ” As part of this task, a preliminary investigation was carried out at the main WTP and the booster pump stations to identify energy cost saving opportunities. For each pump station typical energy rate structures, energy consumption data, wire to water efficiency of pumps and power distribution/monitoring schemes were analyzed to arrive at a set of recommendations that would optimize overall energy costs for the FKAA Water Distribution System. This paper presents the methodology used and the recommendations made to FKAA as a result of this energy conservation study.
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Keywords: Energy Conservation; Energy Consumption; Energy Rate Structures; Energy Reports; Power Distribution; Power Monitoring; SCADA-Data Base; VFD Pumping Systems; Wire to Water Efficiency

Document Type: Research Article

Publication date: 2011-01-01

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