Questions from Thermal Fluid Science

Q: A stream of hydrocarbon (cp = 2.2 kJ/

A stream of hydrocarbon (cp = 2.2 kJ/kg⋅K) is cooled at a rate of 720 kg/h from 150°C to 40°C in the tube side of a double-pipe counterflow heat exchanger. Water (cp = 4.18 kJ/kg⋅K) enters the heat ex...

Q: Two long, parallel 20-cm-diameter cylinders are located

Two long, parallel 20-cm-diameter cylinders are located 30 cm apart from each other. Both cylinders are black and are maintained at temperatures 425 K and 275 K. The surroundings can be treated as a b...

Q: A double-pipe parallel-flow heat exchanger is to heat

A double-pipe parallel-flow heat exchanger is to heat water (cp = 4180 J/kg⋅K) from 25°C to 60°C at a rate of 0.2 kg/s. The heating is to be accomplished by geothermal water (cp = 4310 J/kg⋅K) availab...

Q: Consider two rectangular surfaces perpendicular to each other with a common edge

Consider two rectangular surfaces perpendicular to each other with a common edge that is 1.6 m long. The horizontal surface is 0.8 m wide, and the vertical surface is 1.2 m high. The horizontal surfac...

Q: Complete this table for H2O: /

Complete this table for H2O:

Q: Reconsider Prob. 22–38. Using appropriate software, investigate

Reconsider Prob. 22–38. Using appropriate software, investigate the effects of temperature and mass flow rate of geothermal water on the length of the tube. Let the temperature vary from 100°C to 200°...

Q: A furnace is shaped like a long equilateral-triangular duct where

A furnace is shaped like a long equilateral-triangular duct where the width of each side is 2 m. Heat is supplied from the base surface, whose emissivity is ε1 = 0.8, at a rate of 800 W/m2 while the s...

Q: What is the role of the baffles in a shell-and

What is the role of the baffles in a shell-and-tube heat exchanger? How does the presence of baffles affect the heat transfer and the pumping power requirements? Explain.

Q: Reconsider Prob. 21–88. Using appropriate software, investigate

Reconsider Prob. 21–88. Using appropriate software, investigate the effects of the rate of the heat transfer at the base surface and the temperature of the side surfaces on the temperature of the base...

Q: Glycerin (cp = 2400 J/kg⋅K) at

Glycerin (cp = 2400 J/kg⋅K) at 20°C and 0.5 kg/s is to be heated by ethylene glycol (cp = 2500 J/kg⋅K) at 70°C in a thin walled double-pipe parallel flow heat exchanger. The temperature difference bet...