Info

Reservoir full

Required reservoir capacity to sustain weekly load curve:

7515 X 1000 X 550 X 3600 _ 62.4 X 43,560 X 0.746 X 900 X 0.85 _ 9600 aCre '11

Hours of capacity at full load and 900 ft (274 m) head: 9600 X 62.4 X 43,560 X 0.746 X 900 X 0.85 _

Required reservoir capacity to sustain weekly load curve:

7515 X 1000 X 550 X 3600 _ 62.4 X 43,560 X 0.746 X 900 X 0.85 _ 9600 aCre '11

Hours of capacity at full load and 900 ft (274 m) head: 9600 X 62.4 X 43,560 X 0.746 X 900 X 0.85 _

Pertinent Data

Generating _ rated net head _ 900 ft (274 m)

Generating capacity at rated head for 3 units _ 525 MW Pumping _ rated net head _ 930 ft (283 m) Pumping power at rated head for 3 units _ 555 MW Pumping-to-generating ratio _ 3 to 2

Upon instantaneous loss of load, the unit builds up overspeed. The increase in speed above normal causes a reduction in turbine discharge, which causes waterhammer, which in turn further increases the power delivered to the rotor. This pyramiding continues until the arrival of negative reflected water hammer from the upper reservoir. The head then decreases. The unit is then so much over speed that it begins to act as a brake, as shown by the four-quadrant synoptic chart (Figure 8). As shown by Figure 10 and Table 2, the process gradually damps down to the steady-state runaway speed and head. Many additional and more refined calculations are made later in the course of the design to establish the optimum governor time and rate of turbine gate closure, as given in detail in the works listed at the end of this section.

Survival Treasure

Survival Treasure

This is a collection of 3 guides all about survival. Within this collection you find the following titles: Outdoor Survival Skills, Survival Basics and The Wilderness Survival Guide.

Get My Free Ebook


Post a comment