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Strengthening the global water supply through a decarbonised global desalination sector and improved irrigation systems

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  • Caldera, Upeksha
  • Breyer, Christian

Abstract

This study analyses the role that renewable energy based desalination, in conjunction with improvements in water use efficiency in the irrigation sector, can play towards securing future global water supplies. It is found that the global desalination demand by 2050 can be reduced as much as 30% and 60%, depending on the irrigation efficiency growth rate. India, China, USA, Pakistan and Iran account for between 56% and 62% of the global desalination demand. Decarbonising the desalination sector by 2050, will result in global average levelised cost of water decreasing from about 2.4 €/m3 in 2015, considering unsubsidised fossil fuel costs, to approximately 1.05 €/m3 by 2050, with most regions in the cost range of 0.32 €/m3 – 1.66 €/m3. Low-cost renewable electricity, in particular solar photovoltaics and battery storage, is found to form the backbone of a sustainable and clean global water supply, supported by measures to increase irrigation efficiency. The results show the untapped relationships between the irrigation and decarbonised desalination sector that can be utilised to strengthen the global water supply for the decades to come and meet United Nations Sustainable Development Goals.

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  • Caldera, Upeksha & Breyer, Christian, 2020. "Strengthening the global water supply through a decarbonised global desalination sector and improved irrigation systems," Energy, Elsevier, vol. 200(C).
    • Handle: RePEc:eee:energy:v:200:y:2020:i:c:s0360544220306149
    DOI: 10.1016/j.energy.2020.117507
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