Composit wall K1=10.K2=30,K3=40 W/mC at sieries repectivelly.Thickness for al three layer are 0.2m.From the left side hot air at 150 C ,h=12 W/m²C, while on the left side, surface temperature 30C.Calculate all interace temperatures and cold air temperatures.
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- 3.10 A spherical shell satellite (3-m-OD, 1.25-cm-thick stainless steel walls) re-enters the atmosphere from outer space. If its original temperature is 38°C, the effective average temperature of the atmosphere is 1093°C, and the effective heat transfer coefficient is , estimate the temperature of the shell after reentry, assuming the time of reentry is 10 min and the interior of the shell is evacuated.Composit Wall K₁= 20, K₂=30₂ K3=40 w/mc at Steries re Pectivelly Thickness for at three layer are 0.2m. from the right Side hot air 150 C , h = 12 w/mc while on the left Side, Surface temperature 20 c°. Calculate all interace temperatures and Cold air temperatures-Example2:Thickness of plate (6mm) .Thermal conductivity (20W/m.°C) ,heat generation (3x10'W/m) .heat thermal coefficient between plate surface and fluid supplied (4000W/m?.°C ,3158 W/m?.°C) respectively and fluid temperature (120°C,140°C) respectively .Calculate left and right sides surfaces .If max temperature lies on (2mm) from the side that fluid temperature is (140°C) .so Calculate max temperature can the plate reached to it.
- Composit Wall K₁ = 20, K₂=30₂ K3=40 w/mc at Steries repectively Thickness for at three layer are 0.2m. from the right side hot air 150c, h = 12 w/mc while on the left Side, Surface temperature 20 c°. Calculate all interace temperatures and Cold air temperatures-A plate is maintained at 74°C and this surface is facin an air having temperature of 30°C, then what will be th value of coefficient of volumetric expansion ß?A spherical steel tank (k = 15 W/m.°C, thickness=1.5 cm) tank of inner diameter 3.83 m contains ice @ 0°C in a room at 20°C, the entire steel tank to be at 0°C.What is the radiation heat transfer %D rate (W)? Air properties (k = 0.02439, W/m.°C, Pr = 0.7336, v = 1.426E-5 m /s) %3D Select one: A. 4493.18 B. 5182.0 C. 4818.4 D. 5532.2 E. 4093.0
- Example 1.4 length. It is lined inside with 3 cm of insulating material of k = 0.042 W/mK. It is flying at a height where the average outside temperature is - 30°C. To find: The rate of heating required to maintain the compartment at 20°C for passenger comfort. Given: A jet aircraft compartment is assumed to be a cylindrical tube of 3-m diameter and 20-mplz answer this,ASAP,thx At high temperatures a nuclear reactor consists of a cylindrical wall composite as the fuel element thorium (k = 57 W/mK) wrapped in graphite (k = 3 W/mK) and helium gas flows through a circular cooling channel. Cylinder length 200 mm. Taking into account the helium temperature = 600°C and the convection coefficient, h= 200 W/m²K. When measured, the outside temperature is 100°C, and h = 5 W/m².K. Draw the electrical analogy, and calculate the overall heat transfer rate!The rear window of an automobile is defogged by passing warm air over its inner surface. If the warm air is at Ti = 40°C and the = 30 W/m2-K, what are the inner and outer surface temperatures, in °C, of 4-mm-thick corresponding convection coefficient is h; window glass, if the outside ambient air temperature is To = -15°C and the associated convection coefficient is h, = 65 W/m²-K? o,0 Evaluate the properties of the glass at 300 K. Tsi i °C Ts,0 i °C
- Q2/ A hot surface at 100 C is to be cooled by attaching 27778 copper fins (k=237 w/m.K), 3 cm long for each fin, 0.25 cm dia. to it. Temp. of surrounding air is 30 C and h=35 w/m2.K on the surface. Calculate the heat rate from the surface for a 1m X im section of the plate. Also, determine the effectiveness of the fins.Brass cube "p = 8530 kg/m , c_= 380 J/kg.°C, k= 110 W/m.°C, a = 33.9E-6 W/m.°C", side length =9 mm, are annealed by heating them first to 929°C in a furnace and then allowing them to cool slowly to 130°C in ambient air at 28°C. If the average heat transfer coefficient is 17.3 W/m .°C, how long will the annealing process will (seconds)?A spherical steel tank (k = 15 W/m.°C, thickness=1.5 cm) tank of inner diameter 3.85 m contains ice @ 0°C in a room at 20°C, the entire steel tank to be at 0°C.Wliat is the convection beat transfer rate (W)? Air properties (k= 0.02439 W/m."C, Pr=0.7336, v 1.426E-5 m /s) %3D Select one O A 1434.3 OB 1688.6 OC 1926.3 OD. 939.46 OE 1164.8