Q: Define internal, external, and open-channel flows.
Define internal, external, and open-channel flows.
See AnswerQ: An air-standard cycle with variable specific heats is executed in
An air-standard cycle with variable specific heats is executed in a closed system and is composed of the following four processes: 1-2 v = constant heat addition from 14.7 psia and 80°F in the amount...
See AnswerQ: Refrigerant-134a enters the condenser of a residential heat pump at
Refrigerant-134a enters the condenser of a residential heat pump at 800 kPa and 50°C at a rate of 0.022 kg/s and leaves at 750 kPa subcooled by 3°C. The refrigerant enters the co...
See AnswerQ: The pressure on the suction side of pumps is typically low,
The pressure on the suction side of pumps is typically low, and the surfaces on that side of the pump are susceptible to cavitation, especially at high fluid temperatures. If the minimum pressure on t...
See AnswerQ: A heat pump that operates on the ideal vapor compression cycle with
A heat pump that operates on the ideal vapor compression cycle with refrigerant-134a is used to heat a house and maintain it at 75°F by using underground water at 50°F as the heat source. The house is...
See AnswerQ: A pump is used to transport water to a higher reservoir.
A pump is used to transport water to a higher reservoir. If the water temperature is 20°C, determine the lowest pressure that can exist in the pump without cavitation.
See AnswerQ: A heat pump using refrigerant-134a heats a house by using
A heat pump using refrigerant-134a heats a house by using underground water at 8°C as the heat source. The house is losing heat at a rate of 60,000 kJ/h. The refrigerant enters the compressor at 280 k...
See AnswerQ: Reconsider Prob. 9–162. Using appropriate software, investigate
Reconsider Prob. 9–162. Using appropriate software, investigate the effect of varying the compressor isentropic efficiency over the range 60 to 100 percent. Plot the power input to the compressor and...
See Answer
