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At winter design conditions, a house is projected to lose heat at a rate of 60,000 Btu/h. The internal heat gain from people, lights, and appliances is estimated to be 6000 Btu/h. If this house is to be heated by electric resistance heaters, determine the required rated power of these heaters in Btu/h to maintain the house at constant temperature.
a pot of 1 kg of liquid water is heated on a mountain top where the atmospheric pressure is 0.8 bar. if the liquid
The static design yields a mass of 50 kg and that the bar be made of steel of length 0.25 m with a cross sectional area of 0.01 m2 . Compute the system's natural frequency
Calculate the heat transfer per unit width of the plate. Assuming the length of the plate along the flow of air is 2m.
steam enters the first turbine stage of a vapor power cycle with reheat and regeneration at 32 mpa 600degc and expands
ethanol can be produced by fermentation of sugars and is used as a gasoline blending component. because the sugars can
a particle of mass m is at rest at the origin of a coordinate system.nbsp at t 0 a force of the form f bt2e-lambdat
in an air-standard brayton cycle air enters the compressor at 1000 lbmhr 14.7 psia and 40degf and exits at 70 psig. the
consider the photovoltaic solar panel of example 3.3. the heat transfer coefficient should no longer be takento be a
A thin electric heater is wrapped around a rod of diameter 3 cm. The heater dissipates energy uniformly at a rate of 1300 W/m. Air at 20°C flows normal to the rod with a velocity of 15.6 m/s. Determine the steady state surface temperature of the h..
Draw the block diagram for this system showing all necessary transfer functions. Determine the single block transfer function with Vr and QL in the input function and P as the controlled variable.
describe one method for manipulation of microstructure and mechanical properties for each of the following class of
an air conditioner operating at steady-state takes in moist air at 27 oc 1 bar and 70 relative humidity. the moist air
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