Questions from Thermal Fluid Science

Q: In a dairy plant, milk at 4°C is pasteurized

In a dairy plant, milk at 4°C is pasteurized continuously at 72°C at a rate of 20 L/s for 24 h a day and 365 days a year. The milk is heated to the pasteurizing temperature by ho...

Q: Long aluminum wires of diameter 5 mm (ρ = 2702 kg

Long aluminum wires of diameter 5 mm (ρ = 2702 kg/m3and cp = 0.896 kJ/kg·°C) are extruded at a temperature of 350°C and are cooled to 50°C in...

Q: Repeat Prob. 6–148 for a copper wire (ρ

Repeat Prob. 6–148 for a copper wire (ρ = 8950 kg/m3 and cp = 0.383 kJ/kg·°C). Data from Prob. 6-148: Long aluminum wires of diameter 5 mm (Ï...

Q: Repeat Prob. 2–48 for a differential mercury height of

Repeat Prob. 2–48 for a differential mercury height of 45 mm. Data from Prob 2-48: A mercury manometer (ρ = 13,600 kg/m3) is connected to an air duct to measure the pres...

Q: Refrigerant-134a enters a 28-cm-diameter pipe steadily

Refrigerant-134a enters a 28-cm-diameter pipe steadily at 200 kPa and 20°C with a velocity of 5 m/s. The refrigerant gains heat as it flows and leaves the pipe at 180 kPa and 40°C. Determine (a) the v...

Q: Steam at 80 psia and 400°F is mixed with water

Steam at 80 psia and 400°F is mixed with water at 60°F and 80 psia steadily in an adiabatic device. Steam enters the device at a rate of 0.05 lbm/s, while the water enters at 1 lbm/s. Determine the te...

Q: It is well established that indoor air quality (IAQ) has

It is well established that indoor air quality (IAQ) has a significant effect on general health and productivity of employees at a workplace. A study showed that enhancing IAQ by increasing the buildi...

Q: The ventilating fan of the bathroom of a building has a volume

The ventilating fan of the bathroom of a building has a volume flow rate of 30 L/s and runs continuously. The building is located in San Francisco, California, where the average winter temperature is...

Q: Determine the rate of sensible heat loss from a building due to

Determine the rate of sensible heat loss from a building due to infiltration if the outdoor air at –5°C and 95 kPa enters the building at a rate of 60 L/s when the indoors is maintained at 25°C.

Q: Consider a large classroom on a hot summer day with 150 students

Consider a large classroom on a hot summer day with 150 students, each dissipating 60 W of sensible heat. All the lights, with 6.0 kW of rated power, are kept on. The room has no external walls, and t...