Abstract

The energy crisis and escalating costs of power have prompted the examination of new approaches to meeting future energy needs. The load management alternative offers a lower Time-of-Use(TOU) rate to customers who can shift their power consumption to offpeak periods of the day. Water systems with sufficient pumping and storage capacity can reduce power costs by adopting TOU rates. A computer model is used to project the impact of a proposed TOU rate on a water utility. The model estimates the maximum possible power cost savings subject to pumping, storage and regulatory constraints. The savings can be considerable on days of low water demand. Storage and regulatory constraints will reduce cost savings on days of high water demand. Under TOU rates, power requirements will be higher due to increased friction losses in water transmission.

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