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<br />43 <br /> <br />MONDAY <br /> <br />AUGUST 8, 1977 <br /> <br />INTRODUCTION <br /> <br />significant amount of water is lost over the spillway which <br />reduces the plant's efficiency in relation to water <br />utilization. Provision of a few hundred acre-feet of daily <br />re-regulating storage could alleviate this condition, and <br />it is estimated could permit generation to meet peak loads <br />(in the range of 4,000 kW to 5,000 kW), and 3,630,000 kWh of <br />additional energy on an average annual basis. <br /> <br />b. Purchased Power <br /> <br />.- <br /> <br />The remaining power requirements of the City, are <br />obtained by purchase at wholesale rate structures from <br />Appalachian Power Company (APCO). <br /> <br />c. Power Definitions Used in Report <br /> <br />(1) Demand <br /> <br />The instantaneous power requirement for a system <br />is measured in kilowatts (kW), and is referred to as <br />demand. The corresponding term for generation is capacity <br />which is also expressed in kW. Peak demand is the largest <br />load (for a 30-minute period) which occurs during a given <br />year. <br /> <br />(2) Energy <br /> <br />Energy is the cumulative total of system demands <br />and is expressed in kilowatt-hours (kWh). This term is <br />also used in referring to power output from a generating <br />facility. The total annual energy requirement for a <br />system divided by 8,760 hours (one year) is referred to <br />as average demand (kW). The corresponding term for <br />power generation is average output (kW). <br /> <br />(3) Load Factor <br /> <br />This is an expression of system requirements and <br />is the ratio of average demand to peak demand expressed <br />as a percentage. Plant factor is used for generation in <br />the same manner. <br />