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CASE STUDY

Water Distribution Evaluation City of Wilcox

Situation

The City of Willcox produces its water required for irrigation, fire-fighting and domestic water use from (3) different wells located in its territory The City provides domestic water service to more than 1,200 residential accounts and 200 commercial customers. A historical review of the City’s water pumping records indicates that the City typically produces between 265 to 281 million gallons annually, depending on the water use demand variation from year to year. Quite recently, the advent and implementation of water conservation measures in the area had resulted in a significant reduction in the amount of water pumping by the City, which was reported to be ~196 million gallons for the year of 2015

Not only does the City conserve water, but also seeks to operate their water system at optimum efficiency. The study here has been made possible due to City’s interest and request of an energy audit of their water system to assess the existing operation and energy usage.

Solution

The proposed Energy Efficiency Measures to overcome the inadequacies caused by the unfavorable operating conditions were:

Pump Efficiency Improvement: This measure targets improving the Overall Plant Efficiency of the well.

Well Pump Sequencing and Pipeline Extension: This measure adjusts the sequence of pumping operation and shifts production to the least energy intensity pump.

Leak Detection and Control System:This measure minimizes the amount of leakage in the distribution pipeline

Results

The completed audit revealed the current state of operations, and means to improve. The proposed three measures resulted in electricity savings of approximately $4000 per year.

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