The fuel cell's advantage can be even greater if waste heat is captured in the form of steam and used to drive a conventional generator.

But because of the greater efficiency of fuel cells, less is emitted per unit of power than from conventional generators.

Replacing the conventional electric generator with ATEGs could ultimately increase the fuel economy by up to 4%.

The possibility of such a tax might discourage a builder of conventional generators.

Connect Polly Toynbee to a conventional generator, and the hot air she generates should supply at least 1000 megawatts.

Two years later the reactor was removed and a conventional electric generator was installed.

Scalability allows TPVs to be smaller and lighter than conventional generators.

If the generator could use the gas created when coal is burned, that would save two steps necessary in a conventional generator.

That means that the coal needed for two kilowatt-hours in a conventional generator would make three in the new plant.

Total efficiency, the Israelis estimate, would be about 46 percent, or a little more than a third more than that of a conventional generator.