A wall is constructed of 2.0 cm of copper, 3.0 mm of asbestos sheet [k = 0.166 W/m.°C], and 6.0 cm of fiberglass. Calculate the heat flow area for an overall temperature difference of 500°C. per unit %3D
Q: An experiment was conducted to measure thermal conductivity of a formulated food. The measurement…
A: The thermal conductivity of the product is 0.67143 W/m•K.
Q: A composite wall is formed of a 2.5-cm copper plate (k = 386 W/m.°C), a 3.2-mm layer of 0.038…
A: Note:As per our guidelines we are supposed to answer only one question. Kindly repost other…
Q: 7- Consider a composite structure shown on below. Conductivities of the layer are: kl = k3 = 10…
A:
Q: A wall of house may be approximated by 5.5 in layer of brick flowed by 3 in asbestos layer. what…
A:
Q: Consider a closed cylindrical reactor vessel of diameter D= 1 ft, and length L= 1.5 ft. The surface…
A:
Q: 1.19 A square isothermal chip is of width w = 5 mm on a side and is mounted in a substrate such that…
A: Given data Max. allowable Temp of chip (Tmax) = 85oC Ambient Temperature of coolant (Tcoolant) =…
Q: You would like to use straight pin fins, with a diameter of 6 mm and length of 4 cm, to cool a…
A: Given, Pin fin dimensions d=6 mm L=4 cm k=205 W/m oC h=25 W/m2 oC No. of fins N=25 Baseplate…
Q: A hot surface at 250°C is to be cooled by attaching straight aluminum rectangular fins (k = 240 W/m…
A: Given Data Thermal conductivity, K=240 W/mK Length of the fin, L=25mm The width of the fin, b=50mm…
Q: Q9/ The soil temperature was 5°C. Suddenly the surface temperature drops to 10°C. Determine the…
A:
Q: 2A wall is constructed of 2.0 cm of copper, 3.0 mm of asbestos sheet [k = 0.166 W/m.°C], and 6.0 cm…
A:
Q: U.=20m/s T=24°C Rectangular plate has an unheated starting length of 20 mm. If the surface…
A: Given, Velocity of the flow U∞=20m/s Temperature of the incoming air T∞ = 24°C Unheated length of…
Q: Example : A steel tube having k =46 W/m °C has an inside diameter of 3.0 cm and a tube wall…
A:
Q: Through a stainless steel wire (k=19W/m°C) of 3mm in diameter and 1m in length passes certain…
A: Given Data: Diameter of the wire, d=3 mm Length of the wire, L=1 m
Q: A thick walled tube of stainless steel (k = 19 W/m.C) with inner diameter 20 mm and 40 mm outer…
A:
Q: As a researcher in the field of heat transfer, how will you distinguish between radiation by black…
A: Hello. Since you have posted multiple questions and not specified which question needs to be solved,…
Q: A thick-walled tube of stainless steel [18% Cr, 8% Ni, k=19 W/m.°C] with 2 cm inner diameter (ID)…
A: given;
Q: A glass window of width W = 1 m and height H = 2 m is 5 mm thick and has a thermal conductivity of…
A: Solution:
Q: For the 21.5-cm thick multilayer assembly as listed below, please estimate the temperature on the…
A: Consider the figure: Given:Ti=20°CTo=-20°CRi=0.121 m2K/WRo=0.029 m2K/WThermal conductivity of…
Q: A thick wallet tube of stainless steel (k+10 W/M°C) with 2 cm inside diameter and 4 cm outer…
A:
Q: The heat conducts through the shape below. The temperature of the right face is 93 °C, while the…
A: Assume plate length (L)=1m; Assume steady 1-D flow equation;
Q: A steel pipe with 5-cm OD is covered with a 6.4-mm asbestos insulation [k =0.096 Btu/h ft. °F]…
A:
Q: A hot steam pipe having an inside surface temperature of 250°C has an inside diameter of 8 cm and a…
A: GIVEN DATA- A COMPOSITE CYLINDER GIVEN COVERED WITH DIFFERENT INSULATION WE HAVE TO FIND HEAT…
Q: U=20m/s T=24°C Rectangular plate has an unheated starting length of 20 mm. If the surface…
A: Given : U∞=20 m/sT∞=24°CLunheated=20 mmL=30 mm
Q: A furnace wall is to consist in series of 7 in of kaolin firebrick, 6 in of kaolin insulating brick,…
A: In thermodynamics the transfer of the molecules from the one high temperature body to the lower…
Q: Problem # 2] Calculate the heat loss through a flat sheet glass 2.0 m (w) x 1.0 m(h) x 5.0mm thick…
A:
Q: For your company you need to mass produce 20-cmx10-cm heat sinks to dissipate heat quickly from an…
A: Given data, Dimension of the base/sink = 0.2 m×0.1 m Convective heat transfer coefficient of the…
Q: Problem 6 there are times when contact resistance between two surfaces is so small compared to the…
A:
Q: motor body is 360 mm in diameter (outside) and 240 mm long. Its surface temperature should not…
A: The fin is thin and long enough so that heat loss from the tip is negligible. All the heat is…
Q: A glass window of width W = 1 m and height H = 2 m is 5 mm thick and has a thermal conductivity of…
A: Width of window, W=1m Height of window, H=2m Thickness of window, t=5mm=0.005m Thermal conductivity…
Q: A hot plate 1.2m wide, 0.35m high and at 1 is · Calculate the following Local heat transfer…
A: Given Wide = 1.2 m Height = 0.35 m To find Local heat transfer coefficient Average heat transfer…
Q: Estimate the thermal conductivity of Applesauce at 35 ° C. (Air content = 78.0% wet basis). Thermal…
A: Given data: Applesauce temperature at 350C Air content = 78% wet basis. Determine Thermal…
Q: Window height (0.8 m) and width (1.5 m) consisting of two layers of glass (k = 0.78 W /m Co)…
A:
Q: A steel fin (k = 54 W/m-K) with a cross-section of an equilateral triangle, 5 mm in side is 80 mm…
A:
Q: e The side walls of a refrigerator are made from two thin layers of sheet metal, each 1/8 in. thick,…
A: Given data as per the question The thickness of metal sheet =1/8 in =0.0104 ft The thickness of the…
Q: Figure 1 shows an ideally lagged composite wall consisting of a concrete wall of thickness 0.45 m…
A: Steps are attached herewith.
Q: A current of 200 A is passed through a stainless-steel wire [k=19 W/mK] 3 mm in diameter. The…
A: Given data:-Current, i=200AThermal conductivity of wire, k=19W/m-KDiameter of wire=3mm ⇒Radius,…
Q: thick-walled tube of stainless steel [18% Cr, 8% Ni, k = 19 W/m · ◦C] with 2-cm inner diameter (ID)…
A:
Q: Ql: Consider a copper ( k= 396 W/m K ) long cylindrical fin 0.25 cm in diameter that protrudes from…
A: Given Data K=396 W/mK D=0.25 cm=0.0025 m T0=95+273=368K Ta=25+273=298K h=10 W/m2K P, Perimeter =…
Q: Calculate the rate of heat loss per foot and the thermal resistance for a 15 cm schedule 40 steel…
A:
Q: Thermodynamics problem. A membrane type electrical heater of 20,000 w/m? capacity is sandwiched…
A:
Q: Two water columns are at different temperatures, one being at 35°C and the other being at 18oC. The…
A:
Q: A steel tube having k =46W/m•C has an inside diameter of 3.0 cm and a tube wall thickness of 2 mm is…
A:
Q: thermocouple is inside a chamber with black walls. If the air around the thermocouple is 20 oC, the…
A: Handwritten.jpg
Q: 1. A pipe of outside diameter 20 mm is to be insulated with asbestos which has a mean thermal…
A: Given Outer diameter, do = 20 mm Outer radius, ro = 10 mm = 0.01 m Heat transfer coefficient, h…
Q: Question 1: A glass window of width W = 1 m and height H = 2m is 5 mm thick and has a thermal…
A:
Q: A wall is constructed of 5.0 cm of copper [k = 400 W/m°C] and 5.0 mm of asbestos sheet [k = 0.17…
A: GIVEN DATA For Copper L=5cm K=400 W/m'C For Asbestos L=5mm…
![12 A wall is constructed of 2.0 cm of copper, 3.0 mm of asbestos sheet
[k = 0.166 W/m. °C], and 6.0 cm of fiberglass. Calculate the heat flow per unit
area for an overall temperature difference of 500°C.
%3D](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F12128b20-96f1-4a87-9b5c-c1f7b69939ab%2F594d9c17-6aea-4668-942d-2549da6a6b85%2F3edeiqb_processed.jpeg&w=3840&q=75)
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
- 1.4 To measure thermal conductivity, two similar 1-cm-thick specimens are placed in the apparatus shown in the accompanying sketch. Electric current is supplied to the guard heater, and a wattmeter shows that the power dissipation is 10 W. Thermocouples attached to the warmer and to the cooler surfaces show temperatures of 322 and 300 K, respectively. Calculate the thermal conductivity of the material at the mean temperature in W/m K. Problem 1.41.63 Liquid oxygen (LOX) for the space shuttle is stored at 90 K prior to launch in a spherical container 4 m in diameter. To reduce the loss of oxygen, the sphere is insulated with superinsulation developed at the U.S. National Institute of Standards and Technology's Cryogenic Division; the superinsulation has an effective thermal conductivity of 0.00012 W/m K. If the outside temperature is on the average and the LOX has a heat of vaporization of 213 J/g, calculate the thickness of insulation required to keep the LOX evaporation rate below 200 g/h.Repeat Problem 1.35 but assume that instead of surface temperatures, the given temperatures are those of the air on the left and right sides of the wall and that the convection heat transfer coefficients on the left and right surfaces are 6 and 10W/m2K, respectively.
- 1.3 A furnace wall is to be constructed of brick having standard dimensions of Two kinds of material are available. One has a maximum usable temperature of 1040°C and a thermal conductivity of 1.7 W/(m K), and the other has a maximum temperature limit of 870°C and a thermal conductivity of 0.85 W/(m K). The bricks have the same cost and are laid in any manner, but we wish to design the most economical wall for a furnace with a temperature of 1040°C on the hot side and 200°C on the cold side. If the maximum amount of heat transfer permissible is 950 , determine the most economical arrangement using the available bricks.A square silicon chip 7mm7mm in size and 0.5-mm thick is mounted on a plastic substrate as shown in the sketch below. The top surface of the chip is cooled by a synthetic liquid flowing over it. Electronic circuits on the bottom of the chip generate heat at a rate of 5 W that must be transferred through the chip. Estimate the steady-state temperature difference between the front and back surfaces of the chip. The thermal conductivity of silicon is 150 W/m K. Problem 1.6Thermal Conductivity of Skin" Design experiments and calculate heat transfer coefficients/thermal conductivity (k)
- Example 6: Calculate the critical radius of insulation for asbestos [k = 0.17 W/m · ◦C] surrounding a pipe and exposed to room air at 20◦C with h = 3.0 W/m2 · ◦C. Calculate the heat loss from a 200◦C, .5cm-diameter pipe when covered with the critical radius of insulation and without insulation.A 1 in. o.d. (outer diameter) tube reactor is insulated with a 3 inch layer of asbestos. If the temperature of the outer surface of the insulation is 100 °F and the rate of heat loss per foot of reactor length is 50 BTU/hr, what must the temperature of the inside of the reactor be? [for asbestos, k = 0.105 BTU/hr ft °F]You are designing a small heatsink to cool a high-powered IC on a control unit PCB. The IC puts out 40,000 W/m2 and has a size of 40mm x 20mm. A fan blows 40 degrees C air across the IC at a speed of 4 m/s. The IC is well insulated on its back face. If the convection coefficient is 62 W/m2K, what is the surface temperature of the IC?
- Q2: A: The exterior wall of a single-story office building near Chicago is 3 m high and 15 m long. The wall consists of 100-mm face brick, 40-mm polystyrene insulating board. 150-mm lightweight concrete block, and an interior 16-mm gypsum. The wall contains three single-glass of 3 mm thickness windows 1.5 m high by 2 m long. Calculate the heat loss through the wall at design conditions if the inside temperature is (20 °C). The outside temperature is (-18 "C).You are designing a PCB laid horizontally on the ground. The PCB surface temperature can’t exceed 85℃ and has a size of 96mm x 90mm. Tinfinity = 45oC. "p" is the perimeter of the plate a) Calculate the Rayleigh number. b) If the PCB is laid hot-side UP, what is the Nusselt number and heat transfer coefficient? c) If the PCB is laid hot-side DOWN, what is the Nusselt number and heat transfer coefficient? d) Given your results from b and c, which one has better heat transfer? In that case, what is the maximum power dissipation the board can put out? Properties of Air:k = 0.025 W/mkPr = 0.72v = 1.847 x 10−5u = 16.84 x10−6p = 1.2 kg/m3B =1/ Tf (idwal gass)Required info: There is a 2.00 cm thick stagnant air pocket. a) What thickness of cork would have the same R-factor as the stagnant air pocket? The thermal conductivity of air is 0.0230 W/m-K and of cork is 0.0460 W/m-K. b) What thickness of tin would be required for the same R-factor as a 2.00-cm-thick stagnant air pocket? The thermal conductivity of air is 0.0230 W/m:K and of tin is 66.8 W/m-K. THANK U