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{longname} Q299. What does EPA mean by the term "sequential or simultaneous" in the definition of co-generation? {longname} |
A299.
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40
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CFR
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Part
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98
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defines
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cogeneration
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to
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mean
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a
...
unit
...
that
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produces
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electrical
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energy
...
and
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useful
...
thermal
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energy
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for
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industrial,
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commercial,
...
or
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heating
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or
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cooling
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purposes,
...
through
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the
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sequential
...
or
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simultaneous
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use
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of
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the
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original
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fuel
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energy.
...
Co-generation
...
systems
...
may
...
be
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"sequential
...
or
...
simultaneous"
...
but
...
in
...
all
...
cases
...
cogeneration
...
involves
...
onsite
...
generation
...
of
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electricity
...
and
...
useful
...
thermal
...
energy
...
and
...
some
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form
...
of
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waste
...
heat
...
recovery.
...
For
...
example,
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a
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gas
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turbine
...
or
...
reciprocating
...
engine
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generates
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electricity
...
by
...
burning
...
fuel
...
(natural
...
gas
...
or
...
biogas)
...
and
...
then
...
uses
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a
...
heat
...
recovery
...
unit
...
to
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capture
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useful
...
heat
...
from
...
the
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prime
...
mover's
...
exhaust
...
stream.
...
Alternatively,
...
steam
...
turbines
...
generate
...
electricity
...
as
...
a
...
byproduct
...
of
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steam
...
generation
...
through
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a
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fired
...
boiler.
...
There
...
are
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also
...
cogeneration
...
systems
...
in
...
which
...
the
...
fuel
...
input
...
is
...
first
...
applied
...
to
...
a
...
thermal
...
process
...
such
...
as
...
a
...
furnace
...
and
...
at
...
least
...
some
...
of
...
the
...
heat
...
rejected
...
from
...
the
...
process
...
is
...
then
...
used
...
for
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power
...
production.
...
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{info}
Source: Legacy FAQ
Approval / Publishing History: Version 1
Expiration : none
Relevant Subparts: Subpart A
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