Environmental Engineering Reference
In-Depth Information
Numbers after 2006
are projections
30
25
20
Residential
15
10
Commercial
5
0
1950
1960
1970
1980
1990
2000
2010
2020
2030
Year
Total primary energy consumptions for buildings.
Primary energy use (including that associated with electricity
generation) for the residential and commercial sectors in
Quads (
fig. 11.7
BTU). (Source: US Department of Energy, Energy
Information Administration, Annual Energy Outlook
)
Annual Energy Outlook (
) for the United States
shows that energy use has gone up by four times since
(population has only doubled according to the
census bureau), and is projected to grow by another
% by the year
. The total energy used in buildings
in
Quads (a Quad is a million billion BTU),
a huge amount of energy that is just as hard for me to get
my head around as it is for the reader. The total primary
energy used in the United States is about
was
Quads, so
just think of it as about
% of all the energy used in the
United States.
A reasonable and achievable goal for the building sector
as a whole is that it uses no more energy in
than it
