The question is:1-state the objective of the experiment and explain briefly what was done to achieve this objective.2-explain the effect of the specimen dimeter on the unsteady state heat transfer 3-explain the effect of the specimen material on the unsteady state heat transfer4-discuss the errors and their sources which might occurred in this experiment and affected its results. Heat Transfer LabEXP3-Part1 – H3: UNSTEADY STATE HEAT TRANSFERObjectiveThe observation of unsteady state conduction of heat to the centre of a solid shape when astep change is applied to the temperature at the surface of the shape.Equipment used in this experiment1. Unsteady State Heat Transfer Unit2. Heat Transfer Service Unit H1113. Specimens

The question is: 1-state the objective of the experiment and explain briefly what was done to achieve this objective. 2-explain the effect of the specimen dimeter on the unsteady state heat transfer 3-explain the effect of the specimen material on the unsteady state heat transfer 4-discuss the errors and their sources which might occurred in this experiment and affected its results.

The question is: 1-state the objective of the experiment and explain briefly what was done to achieve this objective. 2-explain the effect of the specimen dimeter on the unsteady state heat transfer 3-explain the effect of the specimen material on the unsteady state heat transfer 4-discuss the errors and their sources which might occurred in this experiment and affected its results.

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 1.77P: 1.77 Explain each in your own words. (a) What is the mode of heat transfer through a large steel...

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1.77 Explain each in your own words. (a) What is the mode of heat transfer through a large steel plate that has its surfaces at specified temperatures? (b) What are the modes when the temperature on one surface of the steel plate is not specified, but the surface is exposed to a fluid at a specified temperature?
1.63 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.
Question six(Heat Transfer) In a heat transfer equipment in a laboratory you used a pipe of outside diameter 9cm to convey steam to reduce the heat outward flow from it to the surroundings. You decided to pad the pipe with two layers of insulating materials each 3cm thick. One from the inside, and the other from the outside. the conductivity of one material being 4times that of the other. I. Show quantitavely that the combined conductivity of the two layers is 28% more when the better thermal insulating material is put on the inside. II. What percentage would the combined conductivity of the two layers be if the better insulating material is now placed on the inside.
(a) The heating power generated by the nuclear heating rod and the inner temperature of the metallic cylinder, T2. (b) The temperature liquid X, which is located between the nuclear heating rod and the meatllic cylinder, Tliquid. (c) The temperature at the surface of the heating rod, T1. (d) If the salt solution temperature is 300 degree Celcius, what is the value of convection heat transfer coefficient, h of the salt solution ? (e) If the heating rod is not covered by metallic cylinder and corresponds to the result of part (c) and (d), how much the rate of energy transfer to the salt solution ? (f) Compare and discuss the difference of heat transfer with and without the matallic cylinder.
The nuclear fuel in cylindrical shape of length L at radius R is covered with aluminum shell at radius RC. The heat energy (Sn) that emerges as a result of splitting in nuclear fuel is per unit volume and is in the form of a parabolic function. Determine the temperature distribution in both regions for the steady state by taking the outer surface temperature of the cylinder. 1/2 Sn = Sn. [a + b(r)] "d 5. RC (cal/cm³ s) To
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Continuous temperature distribution in a semi-permeable material with laser radiation on it, thickness L and with a heat conduction coefficient k, T(x)=-A/k.a^2.e^-ax+Bx+C It is given by equality. Here A, a, B and C are known constants. For this case, the radiation absorption in the material manifests itself in a uniform heat generation term in the form q (x). a) Obtain a relationship for the type that gives the conduction heat fluxes on the front and back surfaces. b) get a correlation for q(x) c) Obtain a relation that gives the radiation energy produced per unit surface area in the whole material.
1/ 1 100% + T7 Heat Transfer & Applications Q1. The heat flux through a wood slab 50 mm thick, whose inner and outer surface temperatures are 40 and 20°C respectively has been determined to be 40 W/m2. What is the thermal conductivity of the wood. (0.1 W/ mK) o uindow 5 mm thick are
Classical Mechanics By writing the Fourier heat conduction equation, we can find the meaning of each term in the equation in units. Please explain.25mm in diameter, 30mm in length, the temperatures of both sides respectively T1 = 40.2oC, T2 = 38.9oC, a cylindrical size with a given thermal power amount of 22.4W Find the heat transfer coefficient of the material.
nnoD :s D betae u 3. Temperature Rise in a Heating Wire. A current of 250 A is passing through stainless-steel wire having a diameter of 5.08 mm. The wire is 2.44 m long and has a resistance of 0.0843 N . The outer surface is held constant at 427.6 K. The thermal conductivity is k 22.5 W/m K. Calculate the center-line temperature at steady state. evard bae 0S 008 i 4R FO Ins
The composite wall of an oven consists of three materials, two of which are of knownthermal conductivity, kA = 20 W/m – K and kC = 50 W/m – K, and known thickness, LA =0.30 m and LC = 0.15 m. The third material, B, which is sandwiched between materialsA and C, is of known thickness, LB = 0.15 m, but unknown thermal conductivity kB.Under steady – state operating conditions, measurements reveal an outer surfacetemperature of 600 oC, and an oven air temperature of 800 oC. The inside convectioncoefficient h is known to be 25 W/m2 – K. total rate of heat transfer = 550 W/m2.What is the value of kB?
Consider steady-state conditions for one-dimensional conduction in a plane wall having a thermal conductivity k = 40 W/m-K and a thickness L = 0.3 m, with no internal heat generation. T2 L Determine the heat flux, in kW/m?, and the unknown quantity for each case. T1 (°C) T2(°C) dT/dx(K/m) 9 (kW/m?) Case 1 50 -20 i i 2 -30 -10 i 70 i 160 i 40 -80 i 5 i 30 200 i