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Energies 2016, 9(10), 839; doi:10.3390/en9100839

Water Storage Instead of Energy Storage for Desalination Powered by Renewable Energy—King Island Case Study

School of Chemical and Biomolecular Engineering, the Univeristy of Sydney, Sydney, NSW 2006, Australia
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Academic Editor: Moran Wang
Received: 31 August 2016 / Revised: 23 September 2016 / Accepted: 11 October 2016 / Published: 19 October 2016
(This article belongs to the Special Issue Selected Papers from 2nd Energy Future Conference)
View Full-Text   |   Download PDF [3386 KB, uploaded 19 October 2016]   |  

Abstract

In this paper, we scrutinized the energy storage options used in mitigation of the intermittent nature of renewable energy resources for desalination process. In off-grid islands and remote areas, renewable energy is often combined with appropriate energy storage technologies (ESTs) to provide a consistent and reliable electric power source. We demonstrated that in developing a renewable energy scheme for desalination purposes, product (water) storage is a more reliable and techno-economic solution. For a King Island (Southeast Australia) case-study, electric power production from renewable energy sources was sized under transient conditions to meet the dynamic demand of freshwater throughout the year. Among four proposed scenarios, we found the most economic option by sizing a 13 MW solar photovoltaic (PV) field to instantly run a proportional RO desalination plant and generate immediate freshwater in diurnal times without the need for energy storage. The excess generated water was stored in 4 × 50 ML (mega liter) storage tanks to meet the load in those solar deficit times. It was also demonstrated that integrating well-sized solar PV with wind power production shows more consistent energy/water profiles that harmonize the transient nature of energy sources with the water consumption dynamics, but that would have trivial economic penalties caused by larger desalination and water storage capacities. View Full-Text
Keywords: energy storage; water storage; off-grid desalination; King Island; transient conditions energy storage; water storage; off-grid desalination; King Island; transient conditions
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Tafech, A.; Milani, D.; Abbas, A. Water Storage Instead of Energy Storage for Desalination Powered by Renewable Energy—King Island Case Study. Energies 2016, 9, 839.

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