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To improve the efficiency of a steam boiler system which generates 1000 psia steam for refinery process use, the boiler feed water (BFW) is to be preheated to 500oF from 100oF before it enters the boiler. This preheat will be accomplished by installing a heat transfer coil in the boiler flue gas stack, recovering heat energy that would otherwise be exhausted to the atmosphere. This BFW is a "compressed liquid water." How much heat energy, expressed as MBTU/hr. is required to effect this BFW preheat at 250gal/min BFW rate?
a 1m3 rigid tank initially contains 5kg of steam at 150degc. a relief valve on top of the tank is opened to allow steam
Assume the same eight features are used to assess quality
A stationary gas turbine power plant operates on a simple ideal Brayton cycle with air as the working fluid. The air enters the compressor at 95 kPa and 290 K and the turbine at 760 kPa and 1100 K. Heat is transferred to the air at a rate of 35,00..
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a gas turbine power plants operates using methane as fuel and 200 excess air. fuel and air enter the plant at 25
how much energy kj is needed to accelerate an 1800 kg vehicle from 10 kmh to 30 kmh? assume that the acceleration takes
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