Small Decentralized Hydropower Program National ... - Cd3wd.com
Small Decentralized Hydropower Program National ... - Cd3wd.com
Small Decentralized Hydropower Program National ... - Cd3wd.com
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
).<br />
e<br />
energia que puede ser generada. Sin embargo, en la<br />
forma en que se la calculo originalmente, representa<br />
las condiciones sin almacenamiento. Su uso supone<br />
que la secuencia de las corrientes tienen poca<br />
importancia.<br />
Si es importante que las corrientes no vayan por<br />
debajo de un valor arbitrario pero razonable entonces<br />
es obvio que sera necesario el almacenamiento,<br />
En este case el flujo debajo de1 reservorio tendra<br />
caracten’sticas de duration fluvial <strong>com</strong>a se indica en<br />
la curva regulada de la duration fluvial ilustrada en<br />
la Figura 6.<br />
Tal regulation de1 flujo obviamente contribtia a<br />
hater que el funcionamiento de las turbinas m&s efi-<br />
ciente mediante el almacenamiento a 10s flujos altos<br />
cuando aparezcan, y proveerlos en tiempos cuando<br />
10s flujos fueran normalmente m5s bajos.<br />
En la Figura 6 el volumen de 10s flujos represen-<br />
tados por a, b, c, d debe, ser igual es a 10s de efgcd.<br />
El area sombreada representa el flujo de1 reservorio.<br />
En Mminos pr&cticos, &to significa que si, por<br />
ejemplo, nosotros hubieramos instalado una turbina<br />
con capacidad de flujo igual al nivel f-g, entonces con<br />
!os f!ujos regulados funcionaria 100% de1 tiempo. Con<br />
Porcentaje Excedente<br />
Percent Exceedance<br />
Figura 6. Curva de lhracicin-Fluvia<br />
Regulada y Sinregular<br />
Figure 6. Regulated and Unregulated Flow-<br />
Duration Curve.<br />
52<br />
out. Reservoir operation studies are no more or<br />
less than accounting for water inflows and<br />
outflows, probably under some assumed<br />
operating schedules, to allow for safe flood<br />
passage, energy production, etc. A proper opera-<br />
tion study will consider, where appropriate, reser-<br />
voir volume loss due to sediment accumulation<br />
and water losses due to evaporation.<br />
The information series available will, to a great<br />
extent, control the detail of the analysis. The<br />
availability of <strong>com</strong>puters for calculation will<br />
greatly facilitate the handling of the data and will<br />
permit the investigation of a variety of alternative<br />
schemes.<br />
A means of estimating the reservoir size that<br />
wil be reuqired to satisfy specified flow demand<br />
is Mass Cure Analysis. The details of this basic<br />
procedure, which are surely known to all civil<br />
engineers, will not be described here. However, it<br />
should be noted that there are many variations of<br />
the basic approach, a number of which are<br />
included in an excellent book by McMahon and<br />
Mein (1978).<br />
The flow-duration approach to power and