X4.46 As shown in Fig. P4.46, a pump operating at steady state draws water from a pond and delivers it though a pipe whose exit is 90 ft above the inlet. At the exit, the mass flow rate is 10 lb/s. There is no significant change in water temperature, pressure, or kinetic energy from inlet to exit. If the power required by the pump is 1.68 hp, deter- mine the rate of heat transfer between the pump and its surroundings, in hp and Btu/min. Let g = 32.0 f/s?.
X4.46 As shown in Fig. P4.46, a pump operating at steady state draws water from a pond and delivers it though a pipe whose exit is 90 ft above the inlet. At the exit, the mass flow rate is 10 lb/s. There is no significant change in water temperature, pressure, or kinetic energy from inlet to exit. If the power required by the pump is 1.68 hp, deter- mine the rate of heat transfer between the pump and its surroundings, in hp and Btu/min. Let g = 32.0 f/s?.
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Transcribed Image Text:X4.46 As shown in Fig. P4.46, a pump operating at steady state draws
water from a pond and delivers it though a pipe whose exit is 90 ft
above the inlet. At the exit, the mass flow rate is 10 lb/s. There is no
significant change in water temperature, pressure, or kinetic energy
from inlet to exit. If the power required by the pump is 1.68 hp, deter-
mine the rate of heat transfer between the pump and its surroundings,
in hp and Btu/min. Let g = 32.0 ft/s.
Q4.46_4.52 m2 = 10 lb/s
90 ft
Pump-
FIGURE P4.46
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