Question

Dry air at 35°C and a velocity of 20 m/s flows over a wetted plate of...

Dry air at 35°C and a velocity of 20 m/s flows over a wetted plate of length 500 mm and width 150 mm. An embedded electrical heater supplies power to maintain the plate surface temperature at 20°C. What is the evaporation rate (kg/h) of water from the plate? What electrical power is required to maintain steady-state conditions?

Determine the evaporation rate of water from the plate, in kg/h

Determine the electrical power is required to maintain steady-state conditions, in W

Homework Answers

Answer #1

Ans:- Evaporation rate of water from the plate.

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A 20-mm-diameter sphere is suspended in a dry airstream with a temperature of 22ºC. The power...
A 20-mm-diameter sphere is suspended in a dry airstream with a temperature of 22ºC. The power supplied to an embedded electrical heater within the sphere is 2.71 W when the surface temperature is 32ºC. How much power is required to maintain the sphere at 32ºC if its outer surface has a thin porous covering saturated with water? Evaluate the properties of air and the diffusion coefficient of the air–water vapor mixture at 300 K.
The air at 20 ° C flows at a speed of 5 m / s on...
The air at 20 ° C flows at a speed of 5 m / s on a plate of 4 m length, 3 m width and a temperature of 80 ° C. What is the heat transfer rate of the surface from the laminar flow zone? (For air, take k = 0.02735 W / m. ° C, Pr = 0.7228, v = 1.798x105 m² / s.)
Liquid water at velocity of 2 m/s and temperature of 15 °C flows over a flat...
Liquid water at velocity of 2 m/s and temperature of 15 °C flows over a flat plate. The plate has a width of 1 m, length of 0.4 m and surface temperature of 37 °C. Determine: (a) the average heat transfer coefficient. (b) the convection heat transfer rate from the top surfacc of the platc.
Problem 4: Air at 20°C and 1 atm flows over a horizontal flat plate at 1...
Problem 4: Air at 20°C and 1 atm flows over a horizontal flat plate at 1 m/s. The plate is 20m by 1m and is maintained at 60°C. If the flow is in the direction of smaller side, calculate the power needed to maintain the surface temperature. Also repeat problem 4 for a case where air velocity is zero.
Consider atmospheric air at 25oC and a velocity of 20 m/s flowing over both surfaces of...
Consider atmospheric air at 25oC and a velocity of 20 m/s flowing over both surfaces of a 1-m-long flat plate that is maintained at 100oC. Determine the rate of heat transfer per unit width from the plate for 5 values of the critical Reynolds number corresponding to 5x10 .
Consider the electrical heater of Problem 7.49. If the blower were to malfunction, terminating airflow while...
Consider the electrical heater of Problem 7.49. If the blower were to malfunction, terminating airflow while the heater continued to operate at 1000 W/m, what tem- perature would the heater assume? How long would it take to come within 10 C of this temperature? Allow for radiation exchange between the heater ( 0.8) and the duct walls, which are also at 27 C. 7.49) Along,cylindrical,electricalheatingelementofdiameter D 10 mm, thermal conductivity k 240 W/m K, den- sity 2700 kg/m3, and specific...
Air at free-stream velocity of 9 m/s flows over a thin flat plate of length 3...
Air at free-stream velocity of 9 m/s flows over a thin flat plate of length 3 m and width 1.5 m. A laminar boundary layer develops from the leading edge of the flat plate. At Rex = 500 000, the boundary layer becomes a turbulent boundary layer where x is the distance from the leading edge. ρair = 1.2 kg/m3 , μair = 1.8 x 10-5 kg/m.s (a) Estimate the length of the laminar boundary layer. (b) Estimate the drag...
Kerosene enters a 5 cm diameter tube at 35C with a velocity of 3 m/s. The...
Kerosene enters a 5 cm diameter tube at 35C with a velocity of 3 m/s. The tube is wrapped with a resistance heating element so that when it is energized a uniform heat flux is imposed on the tube. At the exit of the tube, the temperature of the kerosene is to be 45C. A constraint is placed on the process, such that the local kerosene temperature cannot exceed 80C; this is likely to occur at the wall of the...
A Newtonian liquid of density 2400 kg m-3 flows down under gravity in steady, laminar conditions...
A Newtonian liquid of density 2400 kg m-3 flows down under gravity in steady, laminar conditions over an inclined flat plate at an angle of 30° to the horizontal plane. The thickness of the film can be taken as constant. The velocity distribution across the liquid film is given by: ux= (ρgδ/μ)y(1-y2/δ)sinθ where ux= velocity in the x-direction along the plate, r = density of liquid, g = gravitational acceleration, d = liquid film thickness, m = viscosity of liquid,...
Steam flows steadily through an adiabatic turbine. The inlet conditions are: 20 MPa, 500°C, 90 m/s...
Steam flows steadily through an adiabatic turbine. The inlet conditions are: 20 MPa, 500°C, 90 m/s and the exit conditions are 20 kPa, 95% quality, and 60 m/s. The mass flow rate of the steam is 15 kg/s. Find: a) The change in kinetic energy of the steam, (5 points) b) The power output, and (5 points) c) The turbine inlet area. (5 points)
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT