Cogeneration, also known as combined heat and power
(CHP), is the simultaneous production of electricity,
heat and/or cooling at or near to the point of consumption.
The great majority of decentralized energy systems
are based on cogeneration.
International Cogeneration Data
(1999 / 2000)
Total electricity generation (TWh)
Total Electricity capacity (GWe)
Cogen generation (TWh)
Cogen capacity (GWe)
Cogen generation
Cogen Capacity
Brazil
332
70
10
2.8
3.0
4.0
Canada
576
110
65
13.0
11.3
10.9
China
1,233
298
120
30.0
9.7
10.3
Germany
551
114
70
11.0
12.7
9.6
India
520
105
13
2.6
2.5
2.5
Japan
1.092
259
33
6.8
3.0
2.6
Rusia
846
214
254
64.0
30.0
30.0
UK
383
80
22
4.9
5.7
6.2
USA
3,800
787
304
46.0
8.0
5.8
Total
9,333
2,037
891
181.1
9.5
8.9
Source: Various sources, compiled for WADE's 'World
Survey of Decentralized Energy - 2002/03'
The table above provides cogeneration data for nine
large countries. The cogeneration share of generation
in the nine countries is calculated to be 9.5%. This
is probably not realistic.
Taking into account the potentially substantial amount
of generation in the data which is not associated with
heat recovery, particularly in China, Germany and Russia,
the average for this group is almost certainly less.
The fact that this group includes some large countries
(particularly Russia), which are allocated relatively
high cogen shares, indicates to WADE that a figure
of around 7% serves as a best provisional assessment
for a global figure for the time being.
Until WADE is able to secure more complete data,
we shall use this figure for 2000 and do not believe
that it has moved on significantly since then given
what we have observed in the world's main energy
markets.
On the basis of this 7% figure, this means that
in 2000 installed cogeneration capacity worldwide
was around 230 GWe and the total generation was
about 1,000 TWh (almost equivalent to the total
annual power generation of Japan).
