Questions from Thermal Fluid Science

Q: Geothermal water (cp = 4250 J/kg⋅K)

Geothermal water (cp = 4250 J/kg⋅K) at 75°C is to be used to heat fresh water (cp = 4180 J/kg⋅K) at 17°C at a rate of 1.2 kg/s in a double-pipe counterflow heat exchanger. The heat transfer surface ar...

Q: Consider a hemispherical furnace with a flat circular base of diameter D

Consider a hemispherical furnace with a flat circular base of diameter D. Determine the view factor from the dome of this furnace to its base.

Q: A crossflow heat exchanger with both fluids unmixed has an overall heat

A crossflow heat exchanger with both fluids unmixed has an overall heat transfer coefficient of 200 W/m2⋅K, and a heat transfer surface area of 400 m2. The hot fluid has a heat capacity of 40,000 W/K,...

Q: Consider a conical enclosure of height h and base diameter D.

Consider a conical enclosure of height h and base diameter D. Determine the view factor from the conical side surface to a hole of diameter d located at the center of the base.

Q: In a chemical plant, a certain chemical is heated by hot

In a chemical plant, a certain chemical is heated by hot water supplied by a natural gas furnace. The hot water (cp = 4180J/kg⋅K) is then discharged at 60°C at a rate of 8 kg/min. The plant operates 8...

Q: Determine the four view factors associated with an enclosure formed by two

Determine the four view factors associated with an enclosure formed by two very long concentric cylinders of radii r1 and r2. Neglect the end effects.

Q: A single-pass crossflow heat exchanger with both fluids unmixed has

A single-pass crossflow heat exchanger with both fluids unmixed has water entering at 16°C and exiting at 33°C, while oil (cp = 1.93 kJ/kg⋅K and ρ =...

Q: What is the cause of color? Why do some objects appear

What is the cause of color? Why do some objects appear blue to the eye while others appear red? Is the color of a surface at room temperature related to the radiation it emits?

Q: Which process requires more energy: completely vaporizing 1 kg of saturated

Which process requires more energy: completely vaporizing 1 kg of saturated liquid water at 1 atm pressure or completely vaporizing 1 kg of saturated liquid water at 8 atm pressure?

Q: Air at 18°C (cp = 1006 J/kg

Air at 18°C (cp = 1006 J/kg⋅K) is to be heated to 58°C by hot oil at 80°C (cp = 2150 J/kg⋅K) in a crossflow heat exchanger with air mixed and oil unmixed. The product of the heat transfer surface area...