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<br /><0 <br />CJ <br />N <br />en <br />.- <br />Cf) <br /> <br />i' <br /> <br />PEAKING POWER <br />WHAT IS IT? <br /> <br />Introduction to Peaking Power Concepts for Public Meetings <br /> <br />Peaking power is used to meet high level or short duration loads as <br /> <br />compared to austained power that is used to meet average base loads. But <br /> <br />unlike most of the products we buy, power must be generated at the same <br /> <br />mom~nt as we buy it; it cannot be stored conveniently. At any given moment, <br /> <br />the production of power must be at least equal to the demand caused by <br /> <br />turned on lights, tv. sets, air conditioners, refrigerators, factory machinery, <br /> <br />etc. But demand varies from hour to hour, from day to day and season to <br /> <br />season. <br /> <br />For purposes of this discussion, the terms "capacity" and "energy" are <br /> <br />identified. "Capacity" is considered to be power and is measured in "watts" <br /> <br />or some multiple such as "kilowatts" (kW). "Energy" can be thought of as <br /> <br />work, and is usually measured in "kilowatt-hours" (kWh). <br /> <br />Although a generator may be able to produce enough energy to supply a <br /> <br />city, it may not have the capacity' to deliver the energy in the time span <br />it is needed. For example, a city may require a total of 2,400,000 kWh of <br /> <br />electricity (energy) per day. A 100,000 kW plant operating for 24 hours <br />(100,000 kW x 24 hr. . 2,400,000 kWh) could technically satisfy this demand, <br /> <br />However, the demand for electricity during daylight hours is usually greater <br /> <br />than at night and, as a result, 2,000,000 kWh of energy might be required <br /> <br />between the hours of 7:00 a.m. to 5:00 p.m. So. at least a 200,000 kW <br /> <br />(200,000 kW x 10 hr. . 2,000,000 kWh) plant would be required' to meet this <br /> <br />demand. The 400,000 kWh required between the hours of 5:00 p.m. and 7:00 a.m. <br /> <br />would theoretically be supplied at a rate of 28,571.4 kW for 14 hours, <br /> <br />.~ <br />