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Water Resources Engineering

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13 – 1 Chapter 13 13.1.1. The cost of operating system for one week with the hydro used for peaking (from Figure 13.1.17a) is given in the following table. Plant symbol Capacity (MW) Plant factor (%) Energy (1000 MWh) Unit cost (mills/kWh) Cost ($1000) CMBT-2 CMBT-1 HYDRO CYCL-2 CYCL-1 COAL-1 COAL-3 COAL-2 NUKE-1 500 500 1000 500 500 500 750 750 1000 0 0 25 15 55 72 95 100 100 0 0 42 13 46 60 120 126 168 90 80 0 30 20 15 9 8 6 0 0 0 390 920 900 1080 1008 1008 Totals 6000 68* 575 10.5 5306 * System load factor based on 5000 MW peak load Source: US Army Corps of Engineers (1985) 13.1.2. The cost of operating the system for one week with Hydro used as a base load (from Figure 13.1.17(b)) is given in the following table. Plant symbol Capacity (MW) Plant factor (%) Energy (1000 MWh) Unit cost (mills/kWh) Cost ($1000) CMBT-3 CMBT-2 CMBT-1 CMCY-1 CYCL-2 CYCL-1 COAL-1 COAL-3 HYDRO COAL-2 NUKE-1 500 500 500 500 500 500 500 750 (250) 750 1000 0 0 1 13 33 48 62 85 100 100 100 0 0 1 11 28 40 52 107 42 126 168 100 90 80 60 30 20 15 9 0 8 6 0 0 80 660 840 820 780 963 0 1008 1008 Totals 6000 68* 575 10.8 6159 * System load factor based on 5000 MW peak load Source: US Army Corps of Engineers (1985) 13.1.3. (Adapted from US Army Corps of Engineers (1985)) Hydro energy has a fuel cost of approximately zero mills/kWh. The best loading of hydro to minimize system operating cost would be in the peak of the load. A 1000 MW installation would fit almost in the peak of the load and would displace CMBT-1 at 80 mills/kWh and CMCY-1 at 60 mills/kWh (Figure 13.1.17(a)). The
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