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EM 1110-2-1701 31 Dec 1985 z (head x generation) Weighted average head = (Eq. 5-5) ~ (generation) This analysis would be based on hourly routing studies. Because period-of-record hourly studies are not practical, the analysis would have to be limited to a sufficient number of weeks to be representative of the period of record. (4) Rated head is defined as obtained with turbine wicket gates minimum head at which rated output 20 1 18- _ ———MAXIMUM HEAD 16- 14- + Lu y 12z E < lo- Lll 1 + : 8-- 1 that head where rated pwer is fully opened. Thus, it is the can be obtained. A generator is ——–DESIGNHEAD MINIMUM HEAD 6- 1 — 460/o — — 460/o — I 4- 2- ‘1 I 0 I I I 1 I I I I I 0 10 20 30 40 50 60 70 80 90 100 PERCENTOFTIME EQUALEDOREXCEEDED Figure 5-3. Head-duration curve for run-of-river project, showing how design head can be determined 5-12
EM 111O-2-17O1 31 Dec 1985 selected with a rated capacity to match the rated power output of the turbine at a specific power factor (usually 0.95 for large synchronous generators). Above rated head, the generator capacity limits pwer output, so the unit?s full rated capacity can be obtained at all heads above rated head. Below rated head, the maximum achievable power output with turbine gates fully open is less than rated capacity (Figure 5-4). (5) The selection of rated head is generally a compromise based on cost, efficiency, and dependable capacity considerations. At some projects, the range of head experienced in normal operation is small enough that a unit can be selected such that rated output can be i= w L c1 $ x MAXIMUM ALLOWABLE HEADOFTURBINE .—— ———.— ——.— ——. ~.__—–—— .—— —— —— —— —— RATED HEAD @p/ _f__ /’ / / .7––––7–7— / / 4 / /’ ,// / / // // / /’ ‘/ ‘/ /’GENERATOR ./ * ‘/ LIMIT /’ /’ / /’ / / / +–– ___ / /’ ,’ /’ // // / / / /’ /’ CAPACITY BLEHEADOFTURBINE .—— ——— —.—. ——— — Figure 5-4. Turbine performance curve for a specific design (solid line represents maximum output of unit) 5-13
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Page 41 and 42: 450 400 1 * I USABLEHYDRO ENERGYIN1
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Page 61 and 62: kW=—= QHe (400 - 20 cfs)(31 feet)
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EM 111O-2-17O1 31 Dec 1985 (5) Ente
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EM 1110-2-1701 31 Dec 1985 (1) Sequ
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EM 1110-2-1701 31 Dec 1985 (3) The
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EM 1110-2-1701 31 Dec 1985 periods.
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5-1o. bDDWiOnOf SSR to PrO.iects wi
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EM 1110-2-1701 31 Dec 1985 b. Bata
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EM 1110-2-1701 31 Dec 1985 portion
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EM 111O-2-17O1 31 Dec 1985 make a p
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TABLE 5-5 Factors for Converting Di
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Routing Worksheet EM 1110-2-1701 31
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Explanation of Data in Table 5-6 EM
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EM 1110-2-1701 31 Dec 1985 In the s
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Equation 5-16 would be revised to t
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EM 1110-2-1701 31 Dec 1985 follow a
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EM 111O-2-17O1 31 Dec 1985 the rese
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EM 1110-2-1701 31 July 1985 power (
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EM 1110-2-1701 31 July 1985 except:
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EM 111O-2-17O1 31 Dec 1985 heavily
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EM 1110-2-1701 31 Dec 1985 energy.
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1st reservoir storage above EM 1110
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EM 1110-2-1701 31 Dec 1985 (4) Figu
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EM 1110-2-1701 31 Dec 1985 maintain
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EM 1110-2-1701 31 Dec 1985 (3) Tabl
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EM 1110-2-1701 31 Dec 1985 (3) In s
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EM 1110-2-1701 31 Dec 1985 The back
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Maximize Maximize firm energy 74,00
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EM 1110-2-1701 31 Dec 1985 (2) The
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MAXIMUM POWER POOL POWER GUIDE CURV
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EM 111O-2-17O1 31 Dec 1985 . to exa
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EM 1110-2-1701 31 Dec 1985 (3) If t
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EM 111O-2-17O1 31 Dec 1985 (3) ~ It
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EM 1110-2-1701 31 Dec 1985 QHet (18
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EM 1110-2-1701 31 Dec 1985 Figure 5
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EM 1110-2-1701 31 Dec 1985 assured
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EM 1110-2-1701 31 Dec 1985 ● a hi
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i. Coordination with Other Entities
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EM 1110-2-1701 31 Dec 1985 TABLE 5-
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40, 35 .00 .00 30.00 25.00 20.00 15
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