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L. Chai et al.
6.2 Results
First of all, from the perspective of time development, from 2002 to 2015, the life
cycle water withdrawal and water consumption of household energy consumption
experienced a fluctuating process, but overall it is faced with a slow decrease.
Geographically, the life cycle water consumption of urban household energy
consumption is about four times that of rural water consumption. At the same time,
although the proportion of power and heat water consumption in the whole life
cycle is gradually decreasing, it still cannot be ignored. In 2015, the whole life cycle
water consumption of power and heat was 5.66 km
3 , accounting for 74.6% of the
whole household energy consumption and the whole life cycle water consumption.
At the same time, since 2002, the life cycle water consumption of household gas
and petroleum products has steadily increased. The life cycle water consumption of
household coal consumption accounts for the smallest share.
We studied the blood supply of the upstream sector of the final energy demand
life cycle water from 2002 to 2015, which can better identify the source of energy
consumption. We found that the Agricultural, Husbandry, Forestry and Fishing
(AHFF) sector and Oil and Natural Gas Extraction (ONGE) sector contributed the
biggest shares among all upstream sectors. In particular, for coal consumption, AHFF
accounted for its upstream water intake 70.0% in 2015 and accounted for 84% for
its upstream water consumption.
By analyzing the driving factors of changes in water use throughout the life cycle,
we found that, first of all, the per capita coal consumption of urban residents continues
to decline, while the demand for petroleum products continues to rise. Therefore,
the status of coal is being replaced by petroleum products. At the same time, the
per capita electricity consumption and heat demand of urban households showed an
overall upward trend but declined from 2007 to 2012, which may be related to the
global financial crisis. In general, technological advancement can improve the water
use efficiency of other sectors and reduce the common benefits of household energy
consumption dependent on water.
6.3 Discussion and Conclusion
The improvement of people’s living standards is accompanied by the growth of
energy consumption. However, this growth has put increasing pressure on the natural
environment. A lot of water is used for power and heat, but this proportion is declining,
while the proportion of gas consumption and petroleum product consumption is
increasing. At the same time, the life cycle water consumption of energy consumption
also depends on its upstream sector. We found that AHFF is the largest contributor
to upstream water consumption.
L. Chai et al.
6.2 Results
First of all, from the perspective of time development, from 2002 to 2015, the life
cycle water withdrawal and water consumption of household energy consumption
experienced a fluctuating process, but overall it is faced with a slow decrease.
Geographically, the life cycle water consumption of urban household energy
consumption is about four times that of rural water consumption. At the same time,
although the proportion of power and heat water consumption in the whole life
cycle is gradually decreasing, it still cannot be ignored. In 2015, the whole life cycle
water consumption of power and heat was 5.66 km
3 , accounting for 74.6% of the
whole household energy consumption and the whole life cycle water consumption.
At the same time, since 2002, the life cycle water consumption of household gas
and petroleum products has steadily increased. The life cycle water consumption of
household coal consumption accounts for the smallest share.
We studied the blood supply of the upstream sector of the final energy demand
life cycle water from 2002 to 2015, which can better identify the source of energy
consumption. We found that the Agricultural, Husbandry, Forestry and Fishing
(AHFF) sector and Oil and Natural Gas Extraction (ONGE) sector contributed the
biggest shares among all upstream sectors. In particular, for coal consumption, AHFF
accounted for its upstream water intake 70.0% in 2015 and accounted for 84% for
its upstream water consumption.
By analyzing the driving factors of changes in water use throughout the life cycle,
we found that, first of all, the per capita coal consumption of urban residents continues
to decline, while the demand for petroleum products continues to rise. Therefore,
the status of coal is being replaced by petroleum products. At the same time, the
per capita electricity consumption and heat demand of urban households showed an
overall upward trend but declined from 2007 to 2012, which may be related to the
global financial crisis. In general, technological advancement can improve the water
use efficiency of other sectors and reduce the common benefits of household energy
consumption dependent on water.
6.3 Discussion and Conclusion
The improvement of people’s living standards is accompanied by the growth of
energy consumption. However, this growth has put increasing pressure on the natural
environment. A lot of water is used for power and heat, but this proportion is declining,
while the proportion of gas consumption and petroleum product consumption is
increasing. At the same time, the life cycle water consumption of energy consumption
also depends on its upstream sector. We found that AHFF is the largest contributor
to upstream water consumption.