Page 35 - Boiler plant and distribution system optimization manual

20 Boiler Plant and Distribution System Optimization Manual

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Maximum economically achievable efficiency is the efficien- Maximum attainable efficiency is the result of adding
cy that can be achieved, with efficiency improvement chang- the best available efficiency improvement technology,
es only. if it is economically justifiable. regardless of cost considerations.
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Table 2.1 1ists this efficiency level for a wide Also, it might be cheaper to raise efficiency
range of boilers and fuels. Chapter 13 lists more (productivity) of a boiler rather than install an-
than 100 possible ways to improve boiler plant ef- other boiler, at high cost, to keep up with growing
ficiency. plant steam demands.
Next, it might be necessary to know what Table 2.2 shows maximum attainable effi-
the maximum efficiency of a boiler could be if ciency for various size boilers and fuels.
considered. For example, knowing maximum ef-
ficiency would be useful for emergency planning
if fuel were very scarce.

Table 2.1— Maximum Economically Achievable Efficiency Levels

Table 2.2—Maximum Attainable Efficiency Levels