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Gold/Mining/Energy : Big Dog's Boom Boom Room -- Ignore unavailable to you. Want to Upgrade?

To: Madharry who wrote (74174)	10/31/2006 6:50:38 PM
From: Tommaso	Respond to of 206176

The biggest efficiency increase--and perfectly feasible right now--would be natural-gas-powered heat pumps. In moderately cold weather (down to freezing) they might get 250% efficiency or more--extracting all the heat from the gas itself and extra from the reverse-refrigeration cycle.

To: Madharry who wrote (74174)	10/31/2006 6:59:28 PM
From: Snowshoe	Read Replies (1) \| Respond to of 206176

During August I saw an exhibit of a very rare and unusual fuel cell vehicle, on loan from the Smithsonian to a local county museum in Minnesota. Imagine plowing the back forty on one of these puppies, without diesel fumes or noise... Allis-Chalmers Fuel-Cell Tractor, 1959 No heat, no smoke, no noise In October 1959, this Allis-Chalmers tractor successfully plowed a field of alfalfa in West Allis, WI--its 20-horsepower motor run not by a standard battery but by what was then the largest operational fuel-cell unit in the world. Fuel cells produce electrical power directly through a chemical reaction, without heat, smoke, or noise. Unlike standard batteries, the cells do not store energy but convert chemical energy to electrical energy. After the October 1959 demonstration in the alfalfa field, the Allis-Chalmers Manufacturing Company donated the tractor to the Smithsonian. Notes: Contains 1,008 fuel cells Web display only historywired.si.edu