Unformatted text preview: se the blended rate of $0.135 per kWh
for all cost calculations, which is the average retail price for industrial customers in Massachusetts
Most of the electricity used at the IADC is used on manufacturing processes. Figure 2-4 shows
the results of an energy audit conducted at the IADC in 1995, the last known audit of its type to
be completed at the facility. The auditors indicated that 54% of electricity use at the facility was
used on processes, while 46% was used on support systems. This breakdown, fairly typical in the
aerospace industry, is likely more heavily skewed to process electricity use currently now that many
energy efficient support system technologies has been introduced since the time of the audit[11, 42].
The electricity distribution network in the IADC can be described as a tree structure. At the root of the tree, electricity is delivered to the IADC with a voltage of 15kV at two points
and then distributed to ten substations geographically spread out in the facility. As Figure 2-5
shows, these substations do no...
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- Spring '14