Environmental Engineering Reference
In-Depth Information
The energy-savings of industry
m
is composed of three items from Formula 4.2:
the technical energy-savings from the variation in the energy efficiency
6
of individ-
ual product type
i
, the last two items being the energy-savings from structural
change of industry
m
, one item being the energy-savings from the change of product
structure of industry m and the other item being the energy-savings from the change
of embodied GDP of product type
i
of individual industry
m
.
For the residential sector, it could be calculated by the following Formula
2.3
:
0
E
R
G
E
R
G
E
Res
¼
G
ðÞ
(2.3)
Δ
t
Where,
Δ
E
Res
refers to the energy-savings for the residential sector
E
R
G
refers to the ratio of residential energy consumption of GDP
t
refers to the forecast year
0
refers to the base year
2.2.3 Potential Energy-Saving Analysis
The contributors and roles in realizing the energy-savings target for the 11th FYP
were analyzed by domestic agencies
7
in early 2011 based on above-mentioned
methods.
According to their research, accumulated energy-savings was about 638 Mtce.
Structural adjustment contributed 28.8 % of total energy-savings; the rest came
from technological improvements (see Fig.
2.11
).
For energy-savings through structural adjustments, the contributor from the
industrial structure optimization stood at only 7.9 % (see Table
2.5
), since the
share of the secondary industry only declined by 0.5 % in 2010 compared with 2005
(see Fig.
2.12
).
Meanwhile contributions from the structural adjustment of internal secondary
industry, the internal tertiary industry and the internal major industry subsector are
significant: 26.6 %, 29.6 % and 24.7 % respectively.
For energy-savings through technical improvements, the decline of energy
consumption per unit output of major energy-intensive industrial products such as
iron and steel, cement, electricity, chemical products, paper and so on is the largest
contributor, accounting for 65.5 % of total technical energy-savings.
Accumulated energy-savings from improvements of energy efficiency of the
above-mentioned industrial products amounted to 297.8 Mtce.
6
i.e., energy consumption per unit production.
7
Energy Research Institute (2011), Study on energy-saving evaluation of 11th FYP and perspec-
tive on potential energy-saving for 12th FYP, internal report.