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A neighborhood fuel cell power plant is to be designed for an electric power output of 2000 kW with liquid-water product. Estimate the flow rates of hydrogen and oxygen during peak power production, assuming an 80% efficient power conditioner is used to convert DC to AC power and the fuel cell efficiency is 55%. What is the plant heat rate?
a natural gas methane pipeline is to be designed to transport the gas at a rate of 50000 scfm. the pipe is to be 6
feed at 10 ccelsius containing 20 solids enters an evaporator operating at 90 ccelsius. saturated steam90 quality
Calculate the adiabatic flame temperature attained when methane at 298k, is combusted (a) with oxygen in the molar ratio air/CH4 = 9.524. Assume that CO2 and H2O are the products of the combustion. The adiabatic flame temperature is that temperature ..
determine the change in the specific internal energy of solid aluminum as it is heated at atmospheric pressure from 300
Assuming that the coefficient of friction in cutting is 0.25 for turning a hard aluminium alloy on a 20 hp lathe (mechanical efficiency = 90%) with a width of cut of 0.24 in, a rake angle of 11°, and a cutting speed of 333 ft/min. Assume the cut is a..
a waterfall ride at kings dominion is 50 m high. the water flows over the top of the falls with a speed of 3 ms.a what
Consider the chip cooling scheme of Problem 3.146, but with an insulated top wall placed at the pin tips to force airflow across the pin array.
Find the inside and outside diameter when the ratio of inside to outside diameters is 0.5.
a refrigerator cycle has a cop of 3 and removes 100kw of heat from a building which is kept at 23c. the device rejects
In a tubular low pressure chemical vapor deposition (LPCVD) reactor, gas is introduced at one end at a rate of 75 torr-L/min. At the other end is a vacuum pump of a speed Sp. If the reactor must operate at 1 torr, what value of Sp is required?
a fluid of viscosity micro is placed between two horizontal circular disks of the same radius r. the disk at z 0 is
a power cycle operates between a high temperature reservoir at th k and a low temperature reservoir at tc 280 k. at
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