Water conservation from power generation in China: A provincial level scenario towards 2030

• Published in: Applied energy Vol. 208; pp. 580 - 591
• Main Authors: Li, Mingquan, Dai, Hancheng, Xie, Yang, Tao, Ye, Bregnbaek, Lars, Sandholt, Kaare
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 15.12.2017
• Subjects: Cooling technology; Decomposition analysis; Electric power generation; Renewable power; Water consumption; Electric power generation; Water consumption; Renewable power; Cooling technology; Decomposition analysis
• ISSN: 0306-2619; 1872-9118
• DOI: 10.1016/j.apenergy.2017.09.096

•Disaggregate water consumption by electric power generation in 2015–2030 is estimated.•Renewable energy development and technology advancement can jointly reduce over 60% of water consumption.•Water consumptions by natural gas and nuclear power gradually emerge.•Discrepancy in geographical distributions between water consumption and water resource continue existing.•Contribution of scale, structure and technology effects to water saving are assessed using decomposition approach. Electric power generation poses a high stress to the water supply in China. In this study, we quantified China’s water consumption by electricity generation from 2015 to 2030 by considering different scenarios of electric power generation structure and water consumption intensity, and analyzed water consumption by different sources of electric power and its regional disparity. We found there is a significant difference in water consumption among the presented six scenarios with water consumption varying from 1.78 to 3.62 gigatonnes (Gt) in the year 2030. We also found that water consumption by coal-fired power decreases while water consumption by natural gas and nuclear power increases. Water consumption was and will still be concentrated in the three northern and coastal areas of China. However, the development of renewable power and adoption of water saving technology would contribute to water consumption reduction in these regions. We used a decomposition model for investigating the scale, structure and technology effects of electric power generation on water consumption, and found they present positive, negative and negative effects, respectively. The strongest factor in reducing water consumption is the technology effect, highlighting the importance of adopting water conserving cooling technology. Our findings yield important hints for China’s water conserving policy making in renewable power development, cooling technology choices and siting decisions.