The surface of a 0.5-m diameter space probe dissipates 150 W of heat to the outside. If the probe surface emits 80% of the heat that comes from the electronic equipment inside of it and the probe does not receive radiation from other surfaces, compute for the surface emissive power in w m2

The surface of a 0.5-m diameter space probe dissipates 150 W of heat to the outside. If the probe surface emits 80% of the heat that comes from the electronic equipment inside of it and the probe does not receive radiation from other surfaces, compute for the surface emissive power in w m2

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.

Chapter1: Basic Modes Of Heat Transfer

Section: Chapter Questions

Problem 1.29P: 1.29 A spherical interplanetary probe with a 30-cm diameter contains electronic equipment that...

See similar textbooks

Related questions

Q: Exercise 2: Heat Loss from a Person Consider a person standing in a breezy room at 20°C. Determine…

A: MULTIPLE QUESTIONS: WE CAN ONLY ANSWER MAX ONE QUESTION SO I AM answering EXERCISE 2. GIVEN:…

Q: A brick wall 3 m high, 7.5 m wide, and 160 mm thick has a thermal conductivity of 0.7 W/(m-°C). The…

Q: A 75-hp (shaft output) motor that has an efficiency of 91.0 percent is worn out and is replaced by a…

A: Given Data: The output power of the older shaft motor is (Wo)1= 75 hp The efficiency of the older…

Q: 2. The radial heat conduction through a hollow cylinder increases as the ratio of outer radius to…

A: Conduction is the mode of heat transfer in which energy transfers from higher energetic particle to…

Q: A wall is made of firebricks 9 inches thick and has a 700F difference in the temperature of both…

Q: Consider a pond whose energy budget is dominated by radiation. The pond is disk-shaped, with a…

A: The emissivity, ε, of the outer layer of a material is its viability in discharging energy as warm…

Q: The average rate at which energy is conducted outward through the ground surface in North America is…

A: The average rate at which energy is conducted outward through the ground surface is 54mW/m^2 Thermal…

Q: has an area of 5.5 ft² of 5 mm. If one side is at a temperature of 45° F and the other is at 23° F,…

Q: Calculate the hourly heating load of a house in which all exterior surfaces have a thermal…

A: Given Thermal resistance, R = 14 ft2.h.oF/Btu Temperature, T1 = 65oF…

Q: (c) Consider a person whose exposed surface area is 1.5 m², emissivity is 0.5, and surface…

A: Given Data: A=1.5 m2 Emissivity (e)=0.5 TB=28° C= 301 K Room temperature two cases a)280 K &…

Q: Consider heat loss through the two walls of a house on a winter night. The walls are identical,…

Q: Flat-plate solar collectors are often tilted up toward the sun in order to intercept a greater…

Q: The following unit conversions are illustrations of the SI system of units. Show cancellation of…

A: (a) Given: The thermal conductivity is 0.3 BTU/h ft oF. Calculation: one 0.3 BTU/h ft oF has…

Q: You are designing a solar car with a total roof area for solar cells of 6.4m2. Calculate the…

A: Given data:

Q: نقطة واحدة Thermal diffusivity of a : substance is inversely proportional to conductivity

A: Note: Since the third question is incomplete, we will answer the first two question for you.…

Q: A spherical furnace has an inside diameter of 6 ft and ar outside diameter of 8 ft. The furnace…

Q: Heat radiates from a small sphere suspended in a large room. The surface of the sphere of 1.5 sq.…

Q: A spherical furnace has an inside diameter of 6ft and an outside diameter of 8ft. The furnace shell…

A: Given data r1 = 3 ft r2 = 4 ft r3 = 4.5 ft r4 = 5 ft Thermal conductivity of inner shell (kA) =…

Q: A 50 gallon water tank/collector is placed on the ground at an angle facing the sun. The tank is 1.5…

Q: A thermal efficiency of a cornbustion chamber valued equal to 73.15 % with heat supplied to the…

A: To find : determine the net work done produce . Given : thermal efficiency of a combustion chamber…

Q: .A heat pump design creates a heating effect of 35 kW while using 15 kW of electrical power. he…

Q: Consider a long horizontal pipe with a diameter of 90 mm and emissivity of 0.8 transfers steam at…

A: Given data Taking the properties of air at mean temperature from data book

Q: The amount of heat flow through a body by conduction is Directly proportional to the surface area of…

A: As per Fourier's law of heat transfer, amount of heat flow rate is given by, Q = k A ∆T∆x Here, Q =…

Q: 16. At winter design conditions, a house is projected to lose heat at a rate of 60,000 Btu/h. The…

A: Given :- Rate of heat Loss = 60000 Btu/h Internal heat gain = 6000 Btu / h To find :- Required…

Q: Required information Consider a person whose exposed surface area is 2.1 m, emissivity is 0.5, and…

A: The net rate of radiation heat transfer from the body to the surrounding walls, ceiling and the…

Q: Determine the heat transfer realized by radiation between two coaxial and parallel, full and…

A: To find: The heat transfer. Given: The radius of the semicircular surface is r1=4 cm1 m100 cm=0.04…

Q: A cold-storage room is constructed of an inner layer of 11 mm of pine with thermal conductivity of…

A: Given:- Length of pine(thickness) Lp=11mm=0.011m Length of concrete(thickness) Lc = 75mm=0.075m…

Q: A cold-storage room is constructed of an inner layer of 14 mm of pine with thermal conductivity of…

Q: An astronaut is at work in the service bay of a spacecraft and is surrounded by walls at -100oC. The…

A: Given data: A=3 m2T1=0+273=273KT2=-100+273=173Kε=0.05 Need to determine the rate of heat loss and…

Q: Determine the specific heat of a 150.0 gram object that requires 62.0 cal of energy to raise its…

Q: A wood stove is used to heat a single room. The stove is cylindrical in shape, with a diameter of 26…

Q: An electric heater with the total surface area of 0.25 m? and emissivity 0.75 is in a room where the…

Q: wo very large walls are at constant temperature of 658oF and 856oF. Assuming that the walls behave…

A: Given:T1=658°FT2=856°Fσ=0.1714*10-8 Btu/hr-ft2-R4

Q: Two slabs sandwich a square plate heater of dimensions 30 cm by 30cm. One slab is 13 mm thick (k =…

A: Given data: t1=13 mmk1=0.67 W/m°Ct2=36 mmk2=0.47 W/m°CTO=60°CQ=2 kW Need to determine the maximum…

Q: SITUATION 3.1 Company AAA is going to construct a 8,000 square meters cold storage factory in 6…

Q: (a) What is the rate of energy loss in watts per square meter through a glass window 2.9 mm thick if…

A: (Qa) In the first case it is given that: Thermal conductivity of glass = 1 W/m-K T1 = 78 oF T2 = -15…

Q: 8. Four 20-watt lamps and two ½ - hp motors of the forced-draft evaporators are installed inside a…

Q: Determine the thermal conductivity of water vapor at 174°C.

A: Given temperature is 174°C

Q: he convection heat transfer coefficient between a surface at 40°C and air at 20°C is 20 W⁄m2 − K.…

A: Given Heat transfer coefficient, h = 20 W⁄m2.K Initial Temperature, T1 = 40°C…

Q: A building in the desert is made of concrete blocks(emissivity 0.91) and has an exposed surface area…

A: Let Q =Net rate of heat transfer by radiation A = Surface area =525m2 T2 = 308K T1 = 293K ε…

Question

The surface of a 0.5-m diameter space probe dissipates 150 W of heat to the outside. If the probe
surface emits 80% of the heat that comes from the electronic equipment inside of it and the probe does
not receive radiation from other surfaces, compute for the surface emissive power in :
m²°

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

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Similar questions

1.11 Calculate the heat loss through a glass window 7-mm thick if the inner surface temperature is 20°C and the outer surface temperature is 17°C. Comment on the possible effect of radiation on your answer.
A spherical communications satellite, 2 m in diameter, is placed in orbit around the earth. The satellite generates 1000 W of internal power from a small nuclear generator. If the surface of the satellite has an emittance of 0.3, and is shaded from solar radiation by the earth, estimate its surface temperature.
1.47 A flat roof is modeled as a flat plate insulated on the bottom and placed in the sunlight. If the radiant heat that the roof receives from the sun is , the convection heat transfer coefficient between the roof and the air is 12 W/m2 K, and the air temperature is , determine the roof temperature for the following two cases: (a) Radiative heat loss to space is negligible, (b) The roof is black and radiates to space, which is assumed to be a black- body at 0 K.
1.29 A spherical interplanetary probe with a 30-cm diameter contains electronic equipment that dissipates 100 W. If the probe surface has an emissivity of 0.8, what is its surface temperature in outer space? State your assumptions in the calculations.
Describe and compare the modes of heat loss through the single-pane and double-pane window assemblies shown in the sketch below.
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 .
Determine the power requirement of a soldering iron in which the tip is maintained at 400C. The tip is a cylinder 3 mm in diameter and 10 mm long. The surrounding air temperature is 20C, and the average convection heat transfer coefficient over the tip is 20W/m2K. The tip is highly polished initially, giving it a very low emittance.
Using Table 1.4 as a guide, prepare a similar table showing the orders of magnitude of the thermal resistances of a unit area for convection between a surface and various fluids.
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.
1.76 Explain a fundamental characteristic that differentiates conduction from convection and radiation.
8.15 A mercury bath at is to be heated by immersing cylindrical electric heating rods, each 20 cm tall and 2 cm in diameter. Calculate the maximum electric power rating of a typical rod if its maximum surface temperature is .
1.13 If the outer air temperature in Problem is –2°C, calculate the convection heat transfer coefficient between the outer surface of the window and the air, assuming radiation is negligible.