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A heat pump keeps the air temperature in a house at a temperature of 22.5 oC. The house is losing heat to the outside air through the walls and the windows at a rate of 61,500 kJ/h while the energy generated within the house from people, lights, and appliances amounts to 4,500 kJ/h. For a COP of 2.5, determine the power input to the heat pump in kW.
Calculating electrical power from a geothermal Resource, A geothermal well is producing 9000kg/second from a hot water basin at 200 ºC [enthalpy of 800 KJ/Kg].
a closed and rigid tank with 1.5 m3 volume initially contains saturated vapor refrigerant 134a at 50deg c. the system
The 10-kg block rests on the platform for which = 0.4. If at the instant shown link AB has an angular velocity = 2 rad/s, determine the greatest angular acceleration of the link so that the block doesn't slip.
a flat plate separates two supersonic air flows. the flow along the upper surface has a mach number of 1.4 and a
a hollow cylinder is made by welding two thin disks on either side of a thin ring. it is mounted on a axel and a 2 kg
a rigid container equipped with a stirring device contains 1.5 kg of motor oil. determine the rate of specific energy
you are designing an ex vivo artificial organ. the cells in the organ cannot tolerate shear stress in excess of 0.5 gcm
water is pump from a lake to a storage tank at 18m above at a rate of 70 L/s while consuming 20.4 kW of electric power. disregarding any frictional losses in the pipes and any change s in kinetic energy, determine (a) the overall efficiency of the..
a floating platform weighs 30 kn. a hollow sealed cylinder 1 m in diameter weighs 1 kn per meter of length. the water
a thin plastic membrane is used to separate helium from a gas stream. under steady-state conditions the concentration
a train which is traveling at 80 mihr applies its brakes as it reaches point a and slows down with a constant
gears a and b have a mass of 50kg and 15kg respectivly. their radii of gyration about their respective centers of mass
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