Which fuel cell is best suited to automotive applications?
A) PAFC B) PEM C) MCFC D) None of these
B
You might also like to view...
A tank contains CO2 gas at 25oC and 500 kPa. A valve on the tank is opened slightly so that the CO2 slowly exits the tank until the pressure inside the tank drops to 100 kPa. The volume of the tank is 0.25 m3. Determine the amount of heat transfer necessary so that the CO2 in the tank remains at 25oC throughout the process.
State e: Outlet; State 1: Initial State; State 2: Final State Given: CO2; Te = 25oC; V = 0.25 m3; P1 = 500 kPa; P2 = 100 kPa; T1 = T2 = 25oC Assume: As no information is given and these terms are unlikely to be significant, W = 0, and kinetic and potential energy can be neglected. No flow into the tank (mi = 0). CO2 is an ideal gas with variable specific heats.
Gisele is performing a make/buy study involving the retention or disposal of a 4-year-old machine that was to be in production for 8 years. It cost $500,000 originally. Without a market value estimate, she decided to use the current book value plus 20% for the market value. If DDB depreciation is applied, the market value estimate is closest to: (choose one)
(a) $158,200 (b) $253,125 (c) $217,900 (d) $189,840
Look up the numerical value for the following factors from the compound interest factor tables.
1. (F?P,10%,7) 2. (A?P,12%,10) 3. (P?G,15%,20) 4. (F?A,2%,50) 5. (P?G,35%,15) What will be an ideal response?
The small gaps between the screws on the screw compressor are sealed by:
A) Tip seals. B) Rings on the end of the rotors. C) The malleable nature of metal the screws are made of. D) Oil flooding.