Q: Steam is to be condensed in the condenser of a steam power
Steam is to be condensed in the condenser of a steam power plant at a temperature of 50°C with cooling water from a nearby lake, which enters the tubes of the condenser at 18°C a...
See AnswerQ: Reconsider Prob. 6–78. Using appropriate software, investigate
Reconsider Prob. 6–78. Using appropriate software, investigate the effect of the inlet temperature of cooling water on the rate of condensation of steam. Let the inlet temperature va...
See AnswerQ: A steady-flow compressor is used to compress helium from 15
A steady-flow compressor is used to compress helium from 15 psia and 70°F at the inlet to 200 psia and 600°F at the outlet. The outlet area and velocity are 0.01 ft2 and 100 ft/s, respectively, and th...
See AnswerQ: The gage pressure of the air in the tank shown in Fig
The gage pressure of the air in the tank shown in Fig. P2–58 is measured to be 80 kPa. Determine the differential height h of the mercury column.
See AnswerQ: Two streams of water are mixed in an insulated container to form
Two streams of water are mixed in an insulated container to form a third stream leaving the container. The first stream has a flow rate of 30 kg/s and a temperature of 90°C. The flow rate of the secon...
See AnswerQ: Water is heated in an insulated, constant-diameter tube by
Water is heated in an insulated, constant-diameter tube by a 7-kW electric resistance heater. If the water enters the heater steadily at 20°C and leaves at 75°C, determine the mass flow rate of water....
See AnswerQ: A 110-volt electrical heater is used to warm 0.
A 110-volt electrical heater is used to warm 0.3 m3/s of air at 100 kPa and 15°C to 100 kPa and 30°C. How much current in amperes must be supplied to this heater?
See AnswerQ: The ducts of an air heating system pass through an unheated area
The ducts of an air heating system pass through an unheated area. As a result of heat losses, the temperature of the air in the duct drops by 4°C. If the mass flow rate of air is 120 kg/min, determine...
See AnswerQ: The fan on a personal computer draws 0.3 ft3/
The fan on a personal computer draws 0.3 ft3/s of air at 14.7 psia and 70°F through the box containing the CPU and other components. Air leaves at 14.7 psia and 83°F. Calculate the electrical power, i...
See AnswerQ: Saturated liquid water is heated in a steady-flow steam boiler
Saturated liquid water is heated in a steady-flow steam boiler at a constant pressure of 2 MPa at a rate of 4 kg/s to an outlet temperature of 250°C. Determine the rate of heat transfer in the boiler....
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