Solar radiation is incident on the front surface of athin plate with direct and diffuse components of 300 and 250W/m2, respectively. The direct radiation makes a 30° anglewith the normal of the surface. The plate surfaces have a solarabsorptivity of 0.63 and an emissivity of 0.93. The air temperatureis 5°C and the convection heat transfer coefficient is20 W/m2·K. The effective sky temperature for the front surfaceis -33°C while the surrounding surfaces are at 5°C forthe back surface. Determine the equilibrium temperature ofthe plate.

Q: emissivity of 0.85. Determine the net rate of radiation heat transfers between the two surfaces, and…

A: 1. Steady operating conditions exist 2. The surfaces are opaque, diffuse, and gray 3. Convection…

Q: A limited amount of water in a container is subjected to 5 W/m2K convection condition as the sky…

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Q: A triangular duct whose surfaces are all black has a length of L=0.96 m. By considering the details…

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Q: Required information Two infinitely long parallel plates of width ware located at w distance apart,…

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Q: A furnace is located next to a dense array of cryogenic fluid piping.  The ice-covered piping…

A:

Q: In a cylinderical furnace of 1.5 m dia and 2 m length the curved surface is maintained at 1400 K,its…

A: Solution is given below.

Q: ed at 1400 K,its emis 7. The two ends are ed at 800 K and 600 ies are 0.65 and 0.55

A:

Q: A 4-mm-diameter sphere at 50°C is covered by a 1-mm-thick plastic insulation (k=0.13 W/m°C). The…

A: Given data as per the question Diameter of sphere =4 mm The thickness of insulation =1 mm k=0.13…

Q: An uninsulated steam pipe passes through a room in which the air and walls are at 25°C. The tube's…

A: Given data: Ts=200°CT∞=25°Ch=15 W/m2.Kε=0.8 Need to determine the  surface emissive power and the…

Q: , electrical power consumed by the hot plate will be?

A: Given: Tr=297 K Tp=403 K D=250 mm emmisivity=0.8 To determine: The electrical power consumed

Q: A small circular surface of area A1=2 cm2located at the center of a 2-m-diameter sphere emits…

A: Given:Surface area of the small circle,A1=2 cm2=2×10-4m2Diameter of sphere(blackbody),D=2mSo ,radius…

Q: ne-dimensional plane wall is exposed to convective and radiative conditions at x = 0. The ambient…

A: To given that Ambient temperture,T∞=20°C=293KSurrounding temperture,TSUR=40°C=313KConvection heat…

Q: A thin aluminum sheet with an emissivity of 0.18 on both sides is placed between two very large…

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Q: Consider a black spherical ball, with a diameter of 25 cm, is being suspended in air. Determine the…

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Q: An oil radiator has an outside surface area of 0.18 m2 and operates at a surface temperature of 85…

A:

Q: An enclosure has an inside area of 50 m2, and its inside surface is black. The enclosure is…

A: Given Data: As=50 m2Ao=0.01 m2qrad=52 W   To Find: A. Determine 1) the temperature of the enclosure…

Q: A large isothermal enclosure containing two small surfaces (surface A and surface B) is shown in the…

A: Given: Irradiation = 10000 W/m2

Q: Two parallel plates (1mx0.5m) are maintained at uniform temperatures of T₁ = 1000K and T₂ = 500K and…

A: Area of both the plates, A1=A2=1 m* 0.5 m =0.5 m2Temperature of one plate, T1=1000 KTemperature…

Q: Assuming the sun to be a black body emitting radiation with maximum intensity at 1 = 0.48u m,…

A:

Q: A one-dimensional plane wall is exposed to convective and radiative conditions at x = 0. The ambient…

A: According to the given data Ambient temperature=T∞=15°C Surrounding temperature=Tsur=80°C Surface…

Q: Two very large parallel plates are maintained at uniform temperatures T1 = 901 K and T2 = 426 K and…

A: Given data:

Q: A sphere has a radius of 0.100 m. Its surface can be treated as a grey surface with emissivity 0.20…

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Q: Consider a silicon wafer positioned in a furnace that is zone-heated on the top section and cooled…

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Q: A one-dimensional plane wall is exposed to convective and radiative conditions at x = 0. The ambient…

A: To find: The convective and radiative heat flux to the wall. Given: The ambient temperature is…

Q: A flat-plate collector with one glass cover is placed in horizontal. The absorber plate temperature…

A:

Q: Concentrating collectors X and Y are constructed for heat generation. Both collectors have the same…

A: Write the given data. CF=14ηopt=84.52%TC=141.01 °CT∞=25 °CIX=775.37 W/m2hX=2.92 W/m2°ChY=4.33 W/m2°C

Q: This experiment is conducted to determine the emissivity of a certain material. A lone cylindrical…

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Q: A 1.2 m wide and 5.1 m long solar collector is mounted to a roof.  Now the average surface…

A: Given width of solar collector w=1.2 m Length of solar collector l=5.1 m Average surface temperature…

Q: a certain body at 20 C is display on a top of a building during the night. the body sees nothing but…

A: Given data,  T1= 20°C = 293K  T=23°C = 296 K  To=110 K  ε= 0.92  Let the Stefan Boltzmann constant…

Q: Two parallel planes measuring 1.2 x 1.2 m apart by a distance of 4 cm. The emissivities of the…

A: Given: The distance between two parallel plates is, d=4 cm. The area of the plate is, A=1.2 m×1.2…

Q: A hot water heater 150 mm wide, 2 m long and 1 m hight is at a surface temperature of 50°C in the…

A:

Q: temperature of the black body?

A: Given; Peak wavelength of a black body emitted is;  λ1=1.75 μmBlack body emitted at a temperature;…

Q: wo perfectly black surfaces are constructed so that all the radiant energy leaving a surface at…

A: Given:Temperature of first surface, T1=800°CTemperature of second surface, T2=250°C

Q: Consider a very thin plate that is mounted and attached on a horizontal board. The plate is subject…

A: Given: The incident radiation heat transfer, G = 2000 W/m^2 The absorptivity of the plate, α = 0.8…

Q: Two 75 cm parallel disks are separated by 40 cm and are aligned directly on top of each other. Both…

A:

Q: electrical power consumed by the hot

A: Given: Tr=297 K Tp=403 K D=250 mm= 0.25 m To determine: Power consumed

Q: In radiation heat transfer analysis a body which completely absorbs the radiant energy incident on…

A: Radiation is energy that comes from a source and travels through space at the speed of light.

Q: A surface gains 500 W/m2 heat at an equilibrium temperature of 30 °C and it is subjected to a…

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Q: Calculate the "steady state” numerical values of the earth’s ground temperature Ts and the…

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Q: A cylindrical shape is with diameter of 1.2m and length of 1.2m. The top surface has an emissivity…

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Q: A furnace is located next to a dense array of cryogenic fluid piping. The ice-covered piping…

A:

Q: An astronaut performing an extra-vehicular activity(space walk) shaded from the Sun is wearing a…

A: Given data: Area of the patch, A = 5 cm×8 cm. The emissivity of the patch, ε = 0.30. The thickness…

Radiation

Radiation can be described as the energy in the form of a particular matter or electromagnetic waves traveling in the air and can be in the form of light, sound, and heat. Radiation can be detected through special instruments like X-rays. The radiation from a cooler object is less intense as compared to the radiation from hot objects.