Ethanol and biodiesel can both be used in bio-jet fuel, but the technologies to convert plant - derived oil to jet fuel are at an advanced stage of development,
yield high energy efficiency and are ready for large - scale deployment.
Not exact matches
Professor Ken Naitoh of Waseda University's Faculty of Science and Engineering (Department of Applied Mechanics and Aerospace Engineering, School of Fundamental Science and Engineering) and his associates have discovered a revolutionary
energy conversion principle (new compressive combustion principle) able to
yield stand - alone engines with double or
higher the thermal
efficiency potential of conventional engines, independent of their size.
This is not particularly difficult but is
energy intensive — probably
yielding no more than 25 % of the
energy put into the process as a final product (probably on a par with the overall
energy efficiency of making hydrogen — but with a much more familiar,
high density end product.
Homes with
high -
efficiency plumbing fixtures and appliances save about 30 percent of indoor water use and
yield substantial savings on water, sewer, and
energy bills.