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Some awards were given out on Thursday to businesses who have taken steps to save energy. There's a lot of that going around these days. But Don Shelby says the real story is in...Windows Media - Video
Arguing the merits of indexing with Forbes' expert panel.Flash - Video
March 27: The Obama administration has hiked fuel efficiency standards for passenger cars in the 2011 model year. CNBC’s Phil LeBeau reports. (CNBC)Windows Media - Video
US automakers touted new products with a focus on fuel efficiency and new technologies that they say will help... View related photosFlash - Video
MERCEDES IAA commercial vehicle show 2008 Mercedes Benz special - Blue Efficiency (English)Video - Video
Efficiency?Vlad ITo get efficiency, just divide your kinetic energy (output) by the potential energy (input). If you want a percent answer, you can multiply that by 100%.What is the efficiency that results from these changes?babygurl421550efficiency n = 1 - (T2/T1)
(T2/T1) = 1 - n ----(1)
T1 = hot, T2 =cold
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given T1' = 4T1, T2' = 2T2
n' = 1 - (2T2/4T1) = 1 - (T2/2T1)
n' = 1 - (1/2)(T2/T1) --------(2)
n' = 1 -...
Is a mid efficiency two stage furnace more efficient than a one stage high efficiency furnace?Time to liveinstead of thinking about single or two stage find out what the actual efficiency rating is. They should be able to show you data sheets from the manufacturer.That said keep in mind that the time it t...What should be the expected power efficiency of using an external battery to charge an internal one?epitaphic2 charges, if your charger electronics is good. Less than that is it is designed poorly. A good Li Ion cell can have good energy efficiency if used properly:
http://www.smartsparkenergy.com/pdf/VPP...
What is the efficiency rating of a diesel engine?imustfleeI know what you mean; the problem is there is such a variety of accessories for a diesel that changes the efficiencies. Direct injected common-rail engines with turbochargers and intercoolers are usu...
