MIL-HDBK-1003/7
Table 2 (Cont.)
Power Plant Loads for Design
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* Export (Cont.). . . . . . . . . . . . . .Utilities (hot water and laundry).*
*
*
Use diversity factor of 0.65.
*
*
For kitchen use factor of 1.0.
*
*
Refrigeration (turbine drive).
*
Refrigeration (absorption type). *
*
*
Process.
*
*
Distribution loss.
* Total present load . . . . . . . . . . . Total of above steam loads.
*
*
* Total ultimate load . . . . . . . . . . .Maximum expected steam load for
* (including projected
*
present and additional future
*
* future load)
*
*
plant steam requirements and
*
*
export
*
*
steam loads.
* Minimum continuous
*
Same as distribution loss.
* Emergency load . . . . . . . . . . . . . Demand of services that cannot
*
*
*
tolerate a 4-hour interruption.
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3.1.3
Typical Load Curves.
For an example of a typical load curve, see Figure 1.
Growth Curves. In (a) of Figure 1, note the normal trend growth of total steam
3.1.3.1
and electric demands and the additional loads when new buildings or processes are added.
This curve is useful in timing power plant additions of equipment.
Load Curves. The average of daily steam and electric demands, (b) of Figure 1,
3.1.3.2
for the season or year under consideration for each hour of a 24 hour day is also important.
Such curves are useful in determining load factors and duration of certain demands, and in
dividing the total load among the plant units. Refer also to Appendix B, Load Shedding.
Load Duration Curves. Plot the number of hours duration of each load during a
3.1.3.3
year for present and future load conditions of steam and electricity usage for the Naval
activity. See (c) of Figure 1. This type of curve is useful in determining load factors
and in sizing units of power plant equipment.
Load duration curves for various conditions are shown on Figures 2, 3, 4, and
5.
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