Designed by student, Daniel Fitzgerald, the "air-line" concept was developed with apartment dwellers in mind. Solar energy and ambient air are combined to dry wet clothing. The best thing about this concept is that you can't actually see the clothes when they are put out to dry. Angled metal slats conceal the clothes from sight while still allowing air to circulate and a path for the sun to heat the clothes.
*This concept was originally incorrectly credited as a Dyson design concept; apologies to student designer, Daniel Fitzgerald.