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Both heating and cooling for a structure can be furnished by a heat pump. One such device operating in winter uses R-134a at a flow rate of 0.018 kg/s with the following process state points: condenser entry 800kPa, 55°C; condenser exit 750 kPa with 3 C° subcooling; compressor entry 200 kPa superheated by 4 C°. Determine the (a) isentropic efficiency of the compressor; (b) the rate of heat supplied to the heated room; and (c) the COP of the heat pump.
100 lb of fluid food is heated by addition of 10000 btu of energy. if the food has initial temperature of 40degf and
if a truck carrying a crate on its bed brakes hard enough that the crate slides to the right relative to the truck the
a steam turbine produces 3000 hp with a mass flow rate of 22000 pounds per hour. the steam enters at 1100 degf and 900
eight maintenance activities their normal durations in weeks and the crew sizes for the normal condition are as
water at 120 f and 60 psia flows through a frac12 diameter pipe at 0.6 lbms and is steadily mixed with 0.2 lbms water
an automobile is modeled as a single-degree-of-freedom system vibrating in the vertical direction. it is driven along a
design a combinational circcuit with three inputs x y and z and three outputs a b and c. when the binary input is 0 1 2
a heat engine working on carnot cycle converts 25% of heat into work when the temperature of the sink is reduced by 353 k the efficiency gets doubled .find the temperature of source and sink.
consider an accelerometer with a natural frequency of 800 hz and a damping ratio of 0.6. determine the frequency range
a classroom is occupied by 55 students and one instructor each generating heat at a rate of 100 w. lighting is provided
Determine the stress in a stay at a given temperature. A steel 'stay' of effective length 5m is fitted in between the walls of a ships refrigerated compartment when the temperature is 18 degrees centigrade.
a nozzle for a carbon dioxide co2 fire extinguisher is based on the following inlet conditions pressure2500 kpa
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