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 Affects
of no growth in onsite electricity generation
by manufacturers can be seen in the growth of purchased steam and
reduced use of biomass. Outsourced onsite generation of electricity and
steam--a growing trend-- is considered "purchased."
As
manufacturing onsite generation fell, steam purchases doubled from 243
billion Btu in 1994 and 490 billion Btu in 1998--MECS does not collect
steam generated onsite.
As
the amount of purchased steam grew, the share purchased from all nonutilities
did not grow, 60 percent in 1994 and 57 percent in 1998. The food and
paper industries did purchase more nonutility steam--possibly from the
outsourced site generator. The reader needs to remember that the 1994
data are not matched perfectly with the 1998 because of the reclassification
from the SIC to the NAICS.
Most
agricultural wastes are used by the food industry--specifically by sugar
cane mills. Assuming that most of the wastes are used for onsite electricity
generation--mostly cogeneration, in 1998, sugar cane mills used significantly
less agricultural wastes to generate electricity than in 1994.
Cogeneration
in the food industry was 32 percent lower in 1998 than in 1994--however,
some of this decline may be to the reclassification of malt beverages
out of the food industry.
Some
of the drop in the energy source "wood harvested from trees and the
wood-related refuse" could be due to the affects of the logging industry's
absence from the wood industry classification under NAICS. The logging
industry is a user of this energy source.
In
1994, the paper industry used 150 trillion Btu of "wood harvested
from trees"--only 24 trillion Btu in 1998. Even though this was a
significant drop, the 5 percent reduction in onsite generation was not
found to be significant (NS). See Onsite
Electricity Generation.
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