Electrical power per unit length

Assignment Help Mechanical Engineering
Reference no: EM13947299

Dry air at 35°C and a velocity of 15 m/s flows over a long cylinder of 20-mm diameter. The cylinder is covered with a thin porous coating saturated with water, and an embedded electrical heater supplies power to maintain  the  coating  surface  temperature at 20°C.

(a) What is the evaporation rate of water from the cylinder per unit length (kg/h · m)? What electrical power per unit length of the cylinder (W/m) is required to maintain steady-state conditions?

(b) After a long period of operation, all the water is evaporated from the coating and its surface is dry. For the same free stream conditions and heater power of part (a), estimate the temperature of the surface.

Reference no: EM13947299

Questions Cloud

Determine the extent of heat transfer enhancement : Derive an equation to determine the extent of heat transfer enhancement due to wetting. Evaluate the enhancement for V = 10 m/s, D = 10 mm, Ts = 320 K, and Too = 300 K.
Did the authors use the correct statistical test : Did the authors use the correct statistical test? In other words, what was their rationale for using this test (i.e., were the variables discrete or continuous and was the test appropriate for this type of data?)
Market value balance sheet cash : The balance sheet for Ferguson Corp. is shown here in market value terms. There are 5,000 shares of stock outstanding. The company has declared a dividend of $1.30 per share. The stock goes ex dividend tomorrow. Ignoring any tax effects, what is the ..
Length with a surface temperature : Approximate the human form as an unclothed vertical cylinder of 0.3-m diameter and 1.75-m length with a surface temperature of 30°C.
Electrical power per unit length : What is the evaporation rate of water from the cylinder per unit length (kg/h · m)? What electrical power per unit length of the cylinder (W/m) is required to maintain steady-state conditions?
Discuss what are the three key aspects of research : Which one of them you consider the most important, or are they equally important?
Maximum number of new shares that company could issue : The balance sheet for Ronlad Corporation reported 180,000 shares outstanding, 273,000 shares authorized, and 13,000 shares in treasury stock. Compute the maximum number of new shares that the company could issue.
Calculate the mass rate of water : Assuming the water and air to be at 300 K, calculate the mass rate of water evaporated under steady-state conditions from the cylindrical medium per unit length.
Straight-line amortization and disregard income tax : Barnett Corporation sold a $580,000, 7 percent bond issue on January 1, 2014. The bonds pay interest each June 30 and December 31 and mature 10 years from January 1, 2014. For comparative study and analysis, assume three separate cases. Use straight-..

Reviews

Write a Review

 

Mechanical Engineering Questions & Answers

  A rigid insulated vessel is divided into two compartments

a rigid insulated vessel is divided into two compartments connected by a valve. initially one compartment occupying

  The local shear stress measured at the surface of the plate

a turbulent boundary layer exists in the flow of water at 20degc over a flat plate. the local shear stress measured at

  Calculate the required diameter of a 3 m long stainless

calculate the required diameter of a 3 m long stainless steel annealed rod subjected to an axial tensile load o f 67

  Air at the rate of 18 kgs is drawn into the compressor of a

air at the rate of 18 kgs is drawn into the compressor of a jet engine at 55 kpa and -23c and is compressed reversibly

  A long trough is supported by a continous hinge along its

a long trough is supported by a continous hinge along its lower edge and by a series of horizontal cables attached to

  Black sell his house to gray with gray agreeing to take

black is purchasing a house under a real estate mortagage held by the white mortgage black is obligated to make a

  In a hydroelectric power plant water enters the turbine

in a hydroelectric power plant water enters the turbine nozzles at 880 kpa absolute with a negligible velocity. if the

  Heat exchanger that cools a device

In electronic systems, a heat sink is a heat exchanger that cools a device by dissipating heat into the surrounding medium. In computers, heat sinks are used to cool central processing units (CPU) or graphics processors (GPU). Heat sinks are also ..

  Determine the average temperature of the cooling water can

a cylindrical nuclear fuel rod of 1 cm in diameter is encased in a concentric tube of 2 cm in diameter where cooling

  Determine the electrical power input to the pump

determine the electrical power input to the pump. the density of water is 1kg/l.

  The interface temperature between asbestos and fiber glass

A steel pipe with a 5 cm OD is covered with a 6.4 mm asbestos insulation (k=0.166 W/m.K) followed by a 2.5 cm layer of fiber glass insulation (k= 0.048 W/m.K). The pipe wall temperature is 315oC and the outside insulation temperature is 38oC. Calcula..

  Sigma x sigma y 80 bar sigma zz 100 bar tau xy tau

the following stress state exists around a wellbore drilled in the atlantic oceansigma x sigma y 80 bar sigma zz

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd