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Solar energy for desalination and water purification using carbon materials
Expanded Title:A novel, off-grid, solar concentrator platform has been developed at the University of Pretoria. The system uses only existing technology and cheap, off the shelf components to achieve high levels of concentration. It is a modular structure ensuring scalability to community needs. The concentrator can be coupled to a suitable collector to heat water to a suitable temperature for distillation. A lab scale version of the concept has been tested using graphitic foams and a carbon black suspension as two potential collector options, with promising results. For comparative purposes an improved traditional evaporator, using a thin-film concept to be coupled to a phase-change material (PCM) for energy storage was also developed. This system can be used a benchmark for comparison to the prior two concentrated solar options based on efficiency, economics and operability. 1.2 PROJECT AIMS The following are the aims of the project as laid out in the original proposal: 1. To extend the prior lab testing of the three methods (concentrated solar energy coupled to a graphitic foam target and a carbon black suspension respectively, as well as the thin-film solar evaporator concept), to field testing using real, concentrated in two cases, sunlight as input. The objective is to overcome the issues identified and develop practically implementable systems. 2. To compare all three methods and determine which is the most efficient and cost effective for desalination/brackish water recovery. 3. To determine which of the three methods will result in the design with the lowest maintenance and operator input.
Date Published:01/03/2018
Document Type:Research Report
Document Format:Report
Document File Type:pdf
Research Report Type:Standard
WRC Report No:2467/1/17
ISBN No:978-1-4312-0957-6
Authors:Badenhorst H
Project No:K5/2467
Originator:WRC
Organizations:University of Pretoria
Document Size:2 751 KB
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