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Problem 1
10°C water is flowing in a 10-mm diameter smooth tube. The mass flow rate of the water is 0.15 kg/s. The water will be heated to 50°C by having it flow through a heated section of the tube that is being maintained at a constant temperature of 90°C. Find the needed length of the heated section of the tube.
Problem 2
10°C water is flowing in a 10-mm internal-diameter smooth tube. The mass flow rate of the water is 0.15 kg/s. The water will be heated by passing it through a 3-m long section of the tube where the surface of the tube is being maintained at a constant temperature of 90°C. Find the temperature of the water when it exits the heated section of the tube.
Problem 3
40°C water is flowing in a 3.2-mm inside-diameter smooth tube. The mass flow rate of the water is 0.002 kg/s. The water will be cooled to 10°C by passing it through a section of the tube where the tube wall is being maintained at a constant temperature of 0°C. Find the needed length of the cold section of the tube.
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An air conditioner in the airport of Timbuktu runs a cooling system using R-410a with a high pressure of 1500 kPa and a low pressure of 200 kPa. It should cool the desert air at 45 degrees C down to 15 degrees C. Find the cycle COP. Will the syste..
Determine the turbine inlet temperature, the cycle thermal efficiency, and the back-work ratio of this cycle.
Air at 250 kPA and 15C is being forced into a tire, which has a volume of 0.5m^3, at a velocity of 60 m/s through a 6 mm opening. Find the rate of change of the density in the tire.
If 300 Kg of air is pumped into a previously empty 100 m^3 tank, and the temperature of the air in the tank is 25 deg C, then what is the pressure in the tank in N/m^2?
finite element analysis fea is a modern-day tool in the analysis of structural mechanics fluid dynamics and heat
a reactor setpoint wasincreased from 160 psig to 190 psig. the reactor pressure transmitter was recalibrated from 0-200 psig to 0-300 psig. what is the percent span for the old and new setpoints?
What is the temperature 7 cm from the base if the rod is made of a) pure zinc b) lead c) pure gold. Which will be the hottest at this point?
a 40 mm diameter hole is drilled 3 m deep into the steel shaft. when the two torque are applied determine a the maximum
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