Required informationConsider the base plate of a(n) 770-W household iron with a thickness of L = 0.6 cm, base area of A = 160 cm4, andthermal conductivity of k= 60 W/m K. The inner surface of the base plate is subjected to uniform heat flux generated bythe resistance heaters inside. When steady operating conditions are reached, the outer surface temperature of the plate ismeasured to be 112°C.Base112°Cplate0.Disregarding any heat loss through the upper part of the iron, evaluate the inner surface temperature if the relation for the variation oftemperature in the base plate is 802.08(0.006 - x) + 112 (up to 2 decimal places).°CThe inner surface temperature of the plate is =< Prev2 of 6Next >4) 萨 EN18°C Clear口09

Answered: Image /qna-images/answer/947d9088-f9ea-4dc1-8e5b-36ed8b6149f2.jpg

Answered: Required information Consider the base…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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A furnace of 0.3m by 0.3m by 0.6m inside dimensions is constructed of a material having a thermal conductivity of 0.894 W/m.K. The wall thickness is 10cm. The inner and outer surface temperatures are 600 degree Celcius and 100 degree Celcius respectively. Calculate the heat loss through the furnace wall by using (i) Conduction shape factor. (ii) Thermal resistance.
The temperatures on the left and right surfaces of a 15-cm thick wall are 375°C and 85°C. The wall is constructed of a material with the following properties: k = 0.78 W p = 2700 k9 kJ %3D :0.84 What is the conduction heat flux through the wall in ",? m3, Cp kg-K m.Co W m2
A pin fin of 2024-T6 aluminum has a length and diameter of 8.0 cm and 6.0 mm, respectively. The base of the fin is attached to a solid state electronic device that delivers 2.50 W to the fin. If the fin is surrounded by 25°C air where the heat transfer coefficient is 30 W/m²-K, what is the temperature of the base of the fin? 2.
6. A solid cylinder with a diameter of 3.0 cm and length of 3.2 cm, initially at a uniform temperature of 210°C, is suddenly exposed to a convection environment at 43°C with a convection coefficient of 380 W/m2 K. What is the minimum thermal conductivity of the cylinder material such that the lumped capacity method is applicable? Express your answer in W/m K.
6. A solid cylinder with a diameter of 3.0 cm and length of 3.2 cm, initially at a uniform temperature of 210°C, is suddenly exposed to a convection environment at 43°C with a convection coefficient of 380 W/m2 K. What is the minimum thermal conductivity of the cylinder material such that the lumped capacity method is applicable? Express your answer in W/m K.
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Homework problem for unsteady-state heat transfer Consider a product to be sterilized if its coldest location during heating reaches 115°C. Consider sterilization of potatoes where potatoes (4 cm diameter) is heated in steam at 121°C. Assume symmetrical heating of potatoes and the heat transfer coefficient between the steam and the potatoes is 20 W/m² K. The thermal diffusivity for potatoes is 1.5 × 107m²/s and the thermal conductivity is 0.4 W/m K. The potatoes are initially at 30°C. 1) Calculate the heating time needed for sterilization. 2) Calculate the temperature at the center of the potato after heating 1000 s and 2000 s. Plot how the temperature at the center changes with time t. 3) Calculate the temperature at the surface of the potato at 2000 s. Qualitatively plot how the temperature changes across the apple at t = 2000 s.
Explore the effect of insulation thickness on the heat loss q and the temperature of the insulation outer surface T2 for a steam pipe of 0.05-m outside diameter that is insulated with a layer of calcium silicate. The temperature of the steam fixed at 600 K and the outer surface is exposed to an airflow (T=30°C) that maintains a heat transfer coefficient of h = 85 W/m2.K, which includes the effects of radiation. where ri= 0.025 m and r2 is a variable (0.025 < r2 < 0.50 m). Compute and plot the heat loss and outer surface temperature T32 as a function of the insulation thickness.
= A processing plant is convectively heating a solid half-sphere of radius of 12 cm made of pure aluminum (k 237 W/m-K) by placing it on an insulated surface as shown in Fig. 1. It is exposed to hot exhaust gas at 300°C with a convection coefficient of 180 W/m².K. Is the lumped capacitance approximation valid? Figure 1: Half-sphere
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7. A composite wall consists of three materials, as shown in Figure 2. The inside wall temperature is 200°C and the outside air temperature is 50°C with a convection coefficient of 10 W/m²-K. Determine the temperature along the composite wall. Where A is the area of cross- section (can be taken to be equal to 1) and k is the conductivity. Problem is governed by the equation d²T -kA- = 0, 0
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