Team Steam talk about their winning tube-within-a-tube design for the TUM DeSal Challenge, a competition to supply drinking water without the use of fossil energy, at low costs, and with minimum effort.

► Also of interest:

• Desalination in the Rain: The 2011 TUM DeSal Challenge
• Interview with DeSal Challenge organizer Alex Kroiß
• TUM DeSal Challenge website
• Videos of the teams explaining their designs
  
  • Team Caja Desal — Humidification-Dehumidification
  • Team Ikarus 2.0 — Two-Step Distillation
  • Team KJ5 — Dual Function Design
  • Team ROhr — Hand Pump-Driven Design
  • Team Salinensklaven — Stirling Engine-Based Design
  • Team SDS pty — Improved Solar Still
  • Team Solar-Well — Vacuum Distillation
    
  • Team Zyklon — Humidification-Dehumidification