Question
problem 53
sorry for this low quality ss. Please explain every step thanks.
essor ntial eady and rant the and ergy the t the ith a k Pa ower 4.52 Water is drawn steadily by a pump at a volumetric flow heat excha rate of 0.8 m through a pipe with a 10 cm diameter inlet. effects, de The water is delivered to a tank placed at a height of 10 m above the pipe inlet. The water exits through a nozzle having 4.59 Refriger a diameter of 2.5 cm. Water enters at 25 oC and 1 atm state at 4 pressure but there is no significant change in pressure and temperature liquid at at exit. Six percent of the power input to the pump i cooling wa dissipated in the form of heat into the surroundings. Take the water incre significant value of acceleration due to gravity (g) equal to 9.8 m/s water is 13 Determine (a) the velocity of the water at the inlet and exit effects and and (b) the power required by the pump condenser 4:53 A pump steadily draws water through a pipe from a (a) the ma reservoir at a volumetric flow rate of 1.3 L/s. At the pipe (b) the rate inlet, the pressure is 101.4 the temperature is 18°C, and refrigerant kPa, the velocity is 3 m/s. the pump exit, the pressure is 4.60 a At 240 kPa, the temperature is 18oC, and the velocity is 12 m/s. team enters a she The pump exit is located 12 m above the pipe the pump, in the outside heat determine the power required by is 9.8 exiting as sa transfer, of gravity the condens s and kw The local acceleration state has 76 mm the tubes at A operating at steady temperature in pressure and water pump ssible and its kinetic
Explanation / Answer
power required by the pump
P = (volume flow rate)( density) g h
= ( 1.3 L/s ) ( 10-3 m3 / L ) ( 1000 kg / m3 ) ( 9.8 m /s2 ) ( 12 m )
=0.152 kJ/s
=0.152 kW
