e) If one drives 2000 km per month and a gallon of methanol costs $1.20, determi
ID: 1856157 • Letter: E
Question
e) If one drives 2000 km per month and a gallon of methanol costs $1.20, determine the amount of fuel saved per year when you use the fuel cell version compared with the IC version?
f) For a ten year loan with yearly repayments of principal plus interest of 18% of the initial amount borrowed. By how much can the initial cost of the fuel-cell car exceed that of the IC car for one to break even? Assume that after 10 years the car is totally depreciated.
g) Determine the open circuit voltage of an ideal methanol fuel cell at RTP. To answer this question, make an intelligent guess about the number of electrons freed per molecule of methanol.
Explanation / Answer
Fuel efficiency is a form of thermal efficiency, meaning the efficiency of a process that converts chemical potential energy contained in a carrier fuel into kinetic energy or work. Overall fuel efficiency may vary per device, which in turn may vary per applicatiofuel efficiency, especially fossil fuel power plants or industries dealing with combustion, such as ammonia production during the Haber process. In the context of transport, fuel economy is the energy efficiency of a particular vehicle, and is given as a ratio of distance travelled per unit of fuel consumed. Fuel economy is expressed in miles per gallon (mpg) in the USA and usually also in the UK
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