Molten metal at 2000 C is poured using crucible. The liquid metal jet has a diameter of 3 mm with an insulation shield of 5 cm diameter. There is a slit of 30 degrees around the insulation shield. The temperature inside the room is 30 C and the shield is 700 C. Assuming black bodies, find the net heat transfer between jet and shield, jet and room, shield and the room. One of the steps is wrong? Slit doesnot participate in radiation To find the view factor between metal and shield , ratio of the angles is used View factors are one of the most important steps to solve the problem None of the given Resistance network is required to be built

Molten metal at 2000 C is poured using crucible. The liquid metal jet has a diameter of 3 mm with an insulation shield of 5 cm diameter. There is a slit of 30 degrees around the insulation shield. The temperature inside the room is 30 C and the shield is 700 C. Assuming black bodies, find the net heat transfer between jet and shield, jet and room, shield and the room. One of the steps is wrong? Slit doesnot participate in radiation To find the view factor between metal and shield , ratio of the angles is used View factors are one of the most important steps to solve the problem None of the given Resistance network is required to be built

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter8: Natural Convection

Section: Chapter Questions

Problem 8.44P

See similar textbooks

Related questions

Q: A log of burning wood in the fireplace has a surface temperature of 323°C. Assume the emissivity is…

A: Data given- T = 323 +273.15= 596.15 K ε = 1

Q: EFFECT OF EMISSIVITY ON TEMPERATURE MEASUREMENT. The energy emit- ted from a piece of metal is…

Q: As far as diathermy concern, we use microwaves to deposit its energy in the surface of fatty layers…

A: Diathermy is the use of microwaves aur ultrasound to penetrate energy into the body so as to eat it…

Q: Q2/A) agray body (ɛ= 0.85) emits the same amount of heat as a black body at 1080 k. find the…

Q: The basal metabolic rate isthe rate at which energy is produced in the body when a person is at…

A: Given: Area (A)= 2.0 m2 T=30°C=303 KTs=18°C=291 Kemiisivity (ε)=1 To determine: The net amount of…

Q: A 3x3m plate at 500 degC is suspended vertically in a very large room. The plate has an emissivity…

A: Introduction: The energy emitted from the surface in relation to the energy radiated from the black…

Q: You are using a heated cylindrical tube blackbody as a chamber for an experiment. The tube is 2m…

Q: Calculate the equilibrium temperature of the plate, based on the incoming solar radiation and the…

A: DefinitionThermal radiation:This topic investigates how electromagnetic waves transmit heat across…

Q: The monochro matie emissivit of a surface varies wi th wavelength in the following en=0, ^1um…

A: Given: Monochromatic Emmissivity (ε)ελ=0, λ<0.3µmελ=0.9, 0.3µm≤λ≤1µmελ=0, λ>1µm Surface…

Q: Liquefied natural gas (LNG) is transported around the globe using ships similar to that shown in…

Q: Emissivities of two large parallel plates maintained at 800°C and 300°C are 0.3 and 0.5…

Q: Q1/ A solid body at some initial temperature To is suddenly placed in a room where the air…

Q: Liquefied natural gas (LNG) is transported around the globe using ships similar to that shown in…

A: Radius (r) = 20 m polyurethane foam thickness (t) = 30 cm = 0.3 m Tsi = -162 ºC = -162 +273 = 111 K…

Q: 1. Consider a spaceship that has a volume V = 3000 m³, is effectively spherical in shape and has a…

Q: Imagine you have two concentric, coaxial cylindrical tubes with an evacuated annular space, with…

Q: Find the percentage of reduction in heat transfer if the heater is completely covered by radiation…

Q: 55. At what net rate does heat radiate from a 275-m² black roof on a night when the roof's…

A: As per given question T1=30° c T2=15°c A=0.900 m2 we have to find heat transfer by radiation

Q: A thin disk-shaped wafer (diameter-=30cm) is maintained at T=100oC. The wafer loses heat to the room…

A: Given Data: Diameter of the disk, d=30 cm The emissivity of the surface, ∈=0.85

Q: SUPPOSE THE AMBIENT TEMPERATURE IS 20degrees CELSIUS, AND THE HOT RESERVOIR CONSISTS OF A SPHERICAL…

Q: The spectral, hemispherical absorptivity of an opaque surface and the spectral distribution of…

A: Given Data: α1=0.6T=1100 K To Find:

Q: mispherical dome covers an ice rink of diameter of 25 m. The c and the ice is -5 C. The diameter of…

A: View factor can't be more than one. Yes, spherical dome covered with an ice rink. So, these are…

Q: (b) A black body in vacuum emits maximum radiation at wavelength 0.6x10° m. Estimate the : (1)…

A: Ans.4(b) Given Data Wavelength of the black body, 0.6×10-6m

Q: An infrared camera is used to measure a temperature at a tissue location. The infrared camera uses…

A: Given:ε = 1.0 (assumed total emissivity)Tm = 45°C = 45+273.15 = 318.15 K (temperature reading)σ =…

Q: 1. Two large plates are maintained at a temperature of 900 K and 500 K respectively. Each plate has…

Q: Liquefied natural gas (LNG) is transported around the globe using ships similar to that shown in…

A: Radius (r) = 20 m polyurethane foam thickness (t) = 30 cm = 0.3 m Tsi = -162 ºC = -162 +273 = 111 K…

Q: 1. Two large plates are maintained at a temperature of 900 K and 500 K respectively. Each plate has…

A: Given, T1=900 KT2=500 KA=6 m2 Stephan-Boltzmann constant, σ=5.67×10-8 W/m2.K

Q: A 3x3m plate at 500 degC is suspended vertically in a very large room. The plate has an emissivity…

A: Given:- Plate is suspended vertically in a very large room Length (L) of plate = 3 mwidth (w) of…

Q: the outside of a pipe ( diameter = .2m) has a Sorface temp of 150°C. It Sits Sorrounded by walls…

Q: A flat-plate solar collector, as shown in Fig. 1, is used to heat water by having water flow through…

A: Absorber plate; The safeguard plate is produced using copper, treated steel, or plastic. the entire…

Q: A room is to be heated with a sphere containing 1 metric tonne of hot water via radiation of energy…

A: Find the temperature of sphere in (K) Using radiation heat transfer

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

Q: 40% of incident radiant energy on the surface of thermally transparent body is reflected back, if…

A: Let us represent, Reflectivity = ρ Transmissivity = τ Emissivity = α From the data given in…

Q: A plate that is exposed to the outside environment at 30 ° C, gets a irradiation of 2000 W / m2 .…

Q: One of the steps is wrong

A: View factor gives Idea about how much radiation will fall on another body when it release from one…

Q: trou n Cas 1 I, di cos² 0 dN C J sphere Prad.A di = (transmis: || les 1 2л I, dr cos² 0 sin 0 d0 dø…

A: Formula for the radiation pressure of a blackbody is derived below

Question

Slit doesnot participate in radiation

To find the view factor between metal and shield , ratio of the angles is used

View factors are one of the most important steps to solve the problem

None of the given

Resistance network is required to be built

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Trending now

This is a popular solution!

Step by step

Solved in 4 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

1.25 A spherical vessel, 0.3 m in diameter, is located in a large room whose walls are at 27°C (see sketch). If the vessel is used to store liquid oxygen at –183°C and both the surface of the storage vessel and the walls of the room are black, calculate the rate of heat transfer by radiation to the liquid oxygen in watts and in Btu/h.
1.26 Repeat Problem 1.25 but assume that the surface of the storage vessel has an absorbance (equal to the emittance) of 0.1. Then determine the rate of evaporation of the liquid oxygen in kilograms per second and pounds per hour, assuming that convection can be neglected. The heat of vaporization of oxygen at –183°C is .
A long wire 0.7 mm in diameter with an emissivity of 0.9 is placed in a large quiescent air space at 270 K. If the wire is at 800 K, calculate the net rate of heat loss. Discuss your assumptions.
Determine the rate of radiant heat emission in watts per square meter from a blackbody at (a) 15C, (b) 600C, and (c) 5700C.
Three thin sheets of polished aluminum are placed parallel to each other so that the distance between them is very small compared to the size of the sheets. If one of the outer sheets is at 280C and the other outer sheet is at 60C, calculate the temperature of the intermediate sheet and the net rate of heat flow by radiation. Convection can be ignored.
1.28 The sun has a radius of and approximates a blackbody with a surface temperature of about 5800 K. Calculate the total rate of radiation from the sun and the emitted radiation flux per square meter of surface area.
Molten metal at 2000 C is poured using crucible. The liquid metal jet has a diameter of 3 mm with an insulation shield of 5 cm diameter. There is a slit of 30 degrees around the insulation shield. The temperature inside the room is 30 C and the shield is 700 C. Assuming black bodies, find the net heat transfer between jet and shield, jet and room, shield and the room. One of the steps is wrong A) Resistance network is required to be built B) To find the view factor between metal and shield , ratio of the angles is used C) View factors are one of the most important steps to solve the problem D) None of the above E) Slit doesnot participate in radiation
Liquefied natural gas (LNG) is transported around the globe using ships similar to thatshown in Figure QA3. This ship has four pressurised cylindrical steel tanks each ofradius of 20 m. The tanks are internally insulated with 30 cm of polyurethane foamwhich keeps the LNG at a constant -162 ºC. Take the effective sky temperature is 265K and the net radiative thermal energy exchange with the sky as 1x10^6 W. (a) Calculate the surface temperature of the end (facing the sun) of a tank.(b) Calculate the conductive heat transfer through the end (facing the sun)of a tank. DATA FOR QUESTION: Thermal conductivity, polyurethane foam = 0.02 W/mKStefan’s Constant = 5.67x10^-8 W/m^2K^4Emissivity, steel = 0.95 answers: a) 375K b) 22.1kW
Liquefied natural gas (LNG) is transported around the globe using ships similar to thatshown in Figure QA3. This ship has four pressurised cylindrical steel tanks each ofradius of 20 m. The tanks are internally insulated with 30 cm of polyurethane foamwhich keeps the LNG at a constant -162 ºC. Take the effective sky temperature is 265K and the net radiative thermal energy exchange with the sky as 1x106 W. Calculate the surface temperature of the end (facing the sun) of a tank. Calculate the conductive heat transfer through the end (facing the sun)of a tank.
Liquefied natural gas (LNG) is transported around the globe using ships similar to thatshown in Figure QA3. This ship has four pressurised cylindrical steel tanks each ofradius of 20 m. The tanks are internally insulated with 30 cm of polyurethane foamwhich keeps the LNG at a constant -162 ºC. Take the effective sky temperature is 265K and the net radiative thermal energy exchange with the sky as 1x10^6 W. (a) Calculate the surface temperature of the end (facing the sun) of a tank.(b) Calculate the conductive heat transfer through the end (facing the sun)of a tank. answers: a) 375K b) 22.1kW
A 3x3m plate at 500 degC is suspended vertically in a very large room. The plate has an emissivity of 0.13, The room is at 25degC. What is the net heat transfer from the plate?
the outside of a pipe ( diameter = .2m) has a sorface temp of 150°C. It Sits Sorrounded by walls that Stay at 30°C. The emissivity Of the pipe's aster Sorface is .8 what is the pipe's he at loss?