Oregon State University

2.2 Meeting Power Demand

2.2 Meeting power demand

The figure and table below show the how power demand at Folsom varies over the course of a year. You should notice that power demand is highest during summer months (May - July) and the reservoir is also most full (highest head) during these same months.

Figure 2.2a. Average monthly power production (MW) and reservoir head (ft) at Folsom Dam from 2000-2012 (Source CDEC).

Using the power equation below calculate the average discharge needed to meet the power demand in every month. Fill in the missing variables in each cell of the table below. After checking that you've entered the correct values, the table will calculate the requisite discharge and display a graph of monthly power demand, discharge and head.

Q = (P * 1.181 * 10^4)/(η H)

 

Table__. Average of 2000-2012 Folsom power output and reservoir head

Month Average power demand (MW) Ave. monthly demand (MW-hr) Ave. res. elevation (ft) Ave. head (ft)
Discharge Equation(ft3/s)
Discharge (ft3/s)
Jan 47 34,900 403 290 X 1.181 X 10^4) /
( 0.85 X )
0
Feb 52 35,100 409 296 X 1.181 X 10^4) /
( 0.85 X )
0
Mar 59 44,200 422 309 X 1.181 X 10^4) /
( 0.85 X )
0
Apr 74 53,400 435 322 X 1.181 X 10^4) /
( 0.85 X )
0
May 92 68,400 445 331 X 1.181 X 10^4) /
( 0.85 X )
0
June 94 67,700 446 333 X 1.181 X 10^4) /
( 0.85 X )
0
July 84 62,100 436 323 X 1.181 X 10^4) /
( 0.85 X )
0
Aug 57 42,700 422 309 X 1.181 X 10^4) /
( 0.85 X )
0
Sept 43 31,200 416 302 X 1.181 X 10^4) /
( 0.85 X )
0
Oct 41 30,300 408 294 X 1.181 X 10^4) /
( 0.85 X )
0
Nov 37 26,500 400 287 X 1.181 X 10^4) /
( 0.85 X )
0
Dec 45 33,300 399 285 X 1.181 X 10^4) /
( 0.85 X )
0

Contact Info

116 Gilmore Hall Corvallis, OR 97331
Copyright ©  2017 Oregon State University
Disclaimer