|Updated: 11/24/2005; 11:20:54 PM.
Renewables, fuel cells, hydrogen, and efficiency
Thursday, April 22, 2004
The Heavyweight Sea Snail
: Tidal power plans off Scotland. The unique feature is positioning underwater without expensive attachment to the sea bed. "The Snail is a 15x12 meter (roughly 49x39 feet) anchoring device that uses hydrofoils -- what scientists describe as wings that "fly" in water -- to generate more than 200 tons of downward force to the seabed." The press release
says "At present the potential to use tidal energy is limited by installation methods for turbines, which require firm attachment to the seabed. This is very expensive and, at present, requires turbines to be placed in water depths greater than 25 m and less than 50 m. The full size SNAIL is a prefabricated tidal device that can be cheaply installed in shallow and deep water. This will significantly increase the number of suitable sites for turbines and reduce installation costs." First installation is 5 MW in 2007. 5:16:47 PM
: Progress on thermoacoustic coolers: "Ben & Jerry's teamed with Penn State University to build 'green'-technology freezers which will replace existing ones inside its stores. These new greener chillers use sound waves for cooling." 4:29:10 PM
Copyright 2005 © Ken Novak.
Last update: 11/24/2005; 11:20:54 PM.