Research On Energy Consumption Evaluation Methods For The Whole Process Of Social Water Cycle

Water resources and energy are the basic and strategic resources of economic and social development,both of which depend on each other and are closely related.The development and utilization of water resources can not be separated from the guarantee of energy,and the exploitation and using of energy also need water resources.Therefore,exploring the relationship between water and energy is significant to the sustainable development of society.This article started from the perspective of energy consumption for social water cycle,analyzed the energy consumption of water intaking,water supplying,water using,drainage and reuse in detaile,and took the Beijing-Tianjin-Hebei region's social water cycle in 2014 as an example,calculated the energy consumption of the whole process of social water cycle,and analyzed the energy consumption of different social water cycle links,regional distribution characteristics,energy consumption efficiency,energy consumption of single individual,on this basis,some water and energy conservation measures are proposed,the relationship between water and energy are explored,which is significant to cooperative development between water and energy.The main achievements of this study are as follows:(1)The total energy consumption of social water cycle process in Beijing-Tianj in-Hebei region in 2014 is 127.532 billion kwh,among them,the energy consumption of water intaking,water supplying,water using respectively accounted for 2.3%,5.5%,91.1%,drainage and water reuse accounted for 1.1%.The energy consumption of water using took the absolute advantage,partly because the household water use' energy consumption was largest.Energy consumption efficiency in different links is different,such as energy consumption per household water reached up to 28.9kwh/m3,followed by the public living water,industry water,seawater desalination,water distribution etc.(2)There are small differences in the structure of social water cycle's energy consumption in Beijing,Tianjin and hebei.Beijing's highest urbanization leads to highest household water use,so the energy consumption is the largest;Tianjin's industry took a large proportion,and energy-intensive industries are numerous,so industrial energy consumption's proporation was highest in three regions;in Hebei province,because of the serious over exploitation of groundwater,the energy consumption of groundwater intaking accounted for 3.4%of social water cycle's energy consumption,which is can't be ignored.From the single person's energy consumption space distribution of social water cycle in Beijing-Tianj in-Hebei region,it turned out the decreasing trend around Beijing,closer to Beijing,the greater the single person's energy consumption.(3)The total energy consumption of social water cycle in Beijing-Tianj in-Hebei region was equivalent to 51.52 million tons standard coal.The Beijing-Tianj in-Hebei region consumpted 442.96 tons of standard coal in total,of which the energy consumption caused by the social water cycle accounted for 11.6%,Beijing,Tianjin and Hebei respectively accounted for 25.9%,6.4%,9.7%,showing that the energy consumption of social water cycle has a great influence on the total energy consumption in the region.(4)In order to save water and energy,Beijing,Tianjin and Hebei region need to adopt different energy consumption optimization methods.Beijing should save water and promote the use of water-saving appliances,Tianjin should improve production process of industry,Hebei should remediate groundwater level.At present,the lack of coordination and integration mechanism of water and energy in our country,leads to water saving and energy saving measures are difficult to promote,in the future,it needs to explore the relationship of water and energy further,for scientific decision making and development proposals between water and energy.