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Reply #29: Yes, it is correct. [View All]

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kristopher Donating Member (1000+ posts) Send PM | Profile | Ignore Fri Jul-08-11 09:53 AM
Response to Reply #27
29. Yes, it is correct.
You are playing on the fact that the word has more than one meaning.
The concept of "baseload" as it is used to describe a minimum constant level of demand is one that developed as an economic artifact of large scale centralized thermal being the least expensive technological option available at the time electricity was becoming a part of everyone's lives. This synonym for demand is a normal usage, but it is an outgrowth of the original meaning found in the physical characteristics of generators.
Load:
The amount of power supplied by a source; the resistance of moving parts to be overcome by a motor
The amount of electricity supplied by a generating system at any given time
An impedance or circuit that receives or develops the output of a transistor or other device

The shafts of large scale generators are very, very long and heavy. So long and heavy, in fact, that if they stop rotating they develop a curve where they start to sag in the middle. This curve is removed by slowly rotating the shaft for an extended period of time. What this means in practical operation is that large scale thermal generators are kept running constantly unless they are going to be shut down for longer periods. The period of a nighttime lull is too short to accomplish the shut-down and restart, so large scale plants that are needed during the day are kept running overnight even though they are not delivering electricity to the grid.

It is this "base" + "load" that is the original meaning of the term - the minimum amount that the generators are capable of throttling down to in the evening.

The economic consequences of this are obvious. Fuel is required to keep the plants running but no revenues are being generated, so the natural solution is to institute policies that drive demand for more electricity. The long term consequence of this techno-economic configuration as an economic incentive is a steady and universal increase in both consumption and generation.

That isn't a good thing.

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