Improving Energy Scavenging Capacity via a Vertically Configured Closed-Circuit Pro System


A novel configuration for a closed-circuit PRO system is described. The PRO system enables fluid flow in both the draw and feed channels using gravitational potential energy. As a result the novel PRO system requires neither pressurization pumps nor the use of generated energy in running the pressurization pumps and can recover a significant amount of the 60% of energy typically used to drive pressurization pumps. The new PRO system used as an energy scavenging system is designed to run at the solvent's partial pressure. At lowered pressures, spiral wound membranes can fill up with bubbles, impeding flow. We describe a tubular membrane configuration (different from tubular membranes) which enables bubbles to escape without plugging the membrane assembly. The new PRO system is self cleaning with all salt (in the draw solution or having leaked through the membrane) washed into the distillation unit. A laboratory test device was constructed and operated. It's performance is evaluated at 56% of energy potential recovered.

Author Information
Sanza Kazadi, Jisan Research Institute, USA
Katie Park, Jisan Research Institute, USA
Janice Jeon, Jisan Research Institute, USA
Audrey Lew, Jisan Research Institute, USA
Stanley Song, Jisan Research Institute, USA
JiHyuk Jung, Jisan Research Institute, USA
Beom Jun Kim, Jisan Research Institute, USA
Brandon Luo, Jisan Research Institute, USA

Paper Information
Conference: NACSEE2014
Stream: Energy: Renewable Energy and Environmental Solutions

This paper is part of the NACSEE2014 Conference Proceedings (View)
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Posted by James Alexander Gordon