PROJ00527

• Contract/PO #: FS0024X
• Contractor Name: Florida Water Conservancy District
• Contract Type: Loan
• Water District: 0
• County: La Plata
• Loan Projects - Doc Type: Feasibility Study

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The earliest construction date for the power plant is 1987
and by that time other units may be available and/or identified
that may operate within the site limitations.

The Worthington unit that was selected is the Model lOLNTl4A
horizontal pump that operates at 1210 rpm. The performance curve
for the unit is shown in Appendix D and explained in the following
section "Head and Flow". The top of the scroll case, the bottom
of the case, and the impeller would be moved to the gate chamber
separately and reassembled. The unit, installed in the chamber,
is shown in Figure 7.4.

The selected turbine will not change the water releases from
Lemon Dam. The operation of the dam will be unchanged.

7.4 POWER PRODUCTION
The kW and kWh output of the unit is dependent upon the head
and flow available at the turbine. The flow is dependent upon the
water level in the reservoir, the performance curve of the unit,
and the friction loss through the penstock. The friction loss
reduces the head available at the power plant by nearly 20% so it
is a major factor in the unit output.

A daily simulation model was made of the turbine operation
from 1971 to 1982, a period of 12 years that included very wet and
dry, years. The model calculates the flow through the turbine
based upon the daily reservoir water level, the turbine perform-
ance curve, and the friction loss. The gross head available at
the turbine was calculated by subtracting the tailwater elevation,
7950 feet, from the reservoir water level.

The net head is equal to the gross head minus friction loss
and is calculated by the following iterative process:

7.0-11