TFL%24ETradiG 0.169 iGen selec +Launc- SIS S25 (25) VTeleg3 Dropdo,-bf M Inbcheducation.com/ext/map/index.html?_con%3Dcon&lexternal_browser%3D0&launchUrl=https%253A%252F%252Fnewconnect.mheducation.com%252F#/activity/cHelpSave &SavedRequired informationA cylindriçal fuel rod (k 30 W/m K) of 2 cm in diameter is encased in a concentric tube and cooled by water. The fuel rodgenerates heat uniformly at a rate of 100 MW/m, and the average temperature of the cooling water is 80°C with aconvection heat transfer coefficient of 2500 W/m4-K. The operating pressure of the cooling water is such that the surfacetemperature pf the fuel rod must be kept below 200°C to avoid the cooling water from reaching the critical heat flux (CHF).The crițical heat flux is a thermal limit at which a boiling crisis can occur that cause overheating on the fuel rod surface andlead to damage.ė ren = 100 MW/m3%3DCooling waterFuel rodD=2 cm2500 W/m2-KDetermine the temperature of the fuel rod surface.(You must provide an answer before moving to the next part.)The temperature of the fuei rod surface =%3D< PrevNext>ME6.9 jo17°C ClearENG12f3f4f59)*6)%2334.5.9.8.9.R.

Answered: Image /qna-images/answer/16b8b4c3-eba0-437d-a8b9-5405edbc0780.jpg

Answered: A cylindriçal fuel rod (k= 30 W/m K) of…

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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Consider hotdog being cooked in boiling water in a pan. Would the heat transfer be modeled as one-dimensional or two-dimensional? Would the heat transfer be steady or transient? Explain.
. A hot surface at 100°C is to be cooled by attach- ing 3-cm-long, 0.25-cm-diameter aluminum pin fins (k = 237 W/m - °C) to it, with a center-to-center distance of 0.6 cm. The temperature of the surrounding medium is 30°C, and the heat transfer coefficient on the surfaces is 35 W/m² . °C. Determine the rate of heat transfer from the surface for a 1-m x 1-m section of the plate. Also determine the overall effectiveness of the fins. 3 cm. 0.6 cm dn 0.25 cm
In a manufacturing facility, 2-in-diameter brassballs (k = 64.1 Btu/h·ft·°F, r = 532 lbm/ft3, and cp =0.092 Btu/lbm·°F) initially at 250°F are quenched in a waterbath at 120°F for a period of 2 min at a rate of 120 ballsper minute. If the convection heat transfer coefficient is42 Btu/h·ft2·°F, determine (a) the temperature of the balls afterquenching and (b) the rate at which heat needs to be removedfrom the water in order to keep its temperature constant at120°F.
An electrical wire with a length of 5-m and 3.5-mm-Ø spreads over one room at 18°C. Heat is generated in the wire due to resistance heating with a convection heat transfer coefficient of 23 W/m2-K between the outer surface of the wire and the air in the room. The voltage drop and electric current through the wire are measured to be 60 V and 2 A, respectively. Disregarding any heat transfer by radiation, determine the surface temperature of the wire (°C). Surface Temp. of Wire (°C) =
Determine the heat transfer rate by convection from an electronic chip whosesurface temperature is 35° C and has an exposed surface area of 9 cm2 . Thetemperature of the surrounding air is 20° C. The heat transfer coefficient forthis situation is h = 40 W⁄m2 ⋅ K.
Ice water of 0°C is stored in a spherical container made of steel with an inner diameter of 3 m and a thickness of 1 cm. This container is located in a place where the external temperature is 25℃. The temperature of the entire container is assumed to be 0°C. If thermal resistance in the container is ignored, obtain (a) the heat transfer rate to ice water, and (b) the amount of ice that melts for 24 hours. The melting heat of ice at atmospheric pressure is 333.7 kJ/kg. The emissivity of the outer wall of the container is 0.75, and the convective thermoelectric transfer coefficient is 30 W/m2·K. The average temperature of the surrounding surface for radiation is 15℃. ***I would appreciate it if sir could write it in a way that I could read it well.**
A house is to be maintained at 21°C DBT and 50% RH, while the outdoor conditions are -30°C DBT and 100% RH. The inner and outer surface heat transfer coefficients are 8.3 W/m2.K and 34.4 W/m?.K, respectively. The exterior walls of the houses are chosen such that they have a thermal resistance of 0.45 m2.°C/W. Determine whether the walls are insulated sufficiently to prevent moisture condensation on the inner surfaces or not. If the selected wall construction may lead to condensation, what is the minimum thickness of insulation (kjns=0.036 W/m2 K) ?to be added to prevent condensation
The temperature of a gas stream is to be measured by a thermocouple whose junction can be approximated as a 1.2-mm-diameter sphere. The properties of the junction are k = 35 W/m °C, ρ= 8500 kg/m3 ,and Cp = 320 J/kg °C, and the heat transfer coefficient between the junction and the gas is h = 65 W/m2 °C. Determine how long it will take for the thermocouple to read %95 of the initial temperature difference.
In a meat processing plant, 4 cm-diameter spherical meat balls (k=0.45 W/m-K and α=0.91×10-7 m²/s) that are initially at 25 °C are to be cooled by passing them through a refrigeration room at -10 °C. The heat transfer coefficient in the cold room is 22.5 W/m²-K. If surface of the meat balls is to be cooled to 3 °C, determine how long the meat balls should be kept in the refrigeration room. What will be the center temperature of the meat balls at the end of the process?
Ball bearing ro=4 mm leaving the oven at a uniform temperature of 900 oC are exposed to air for a while before they are dropped in to the water for quenching . Determine the time they can stand the air before their temperature falls below 850 oC also find the total rate of heat transfer .Take for the balls k = 54 W/m .oC , ρ= 7833 kg/m3 , Cp=0.456 kJ/kg.oC
A person is found dead at 5PM in a room whose temperature is 20°C. Thetemperature of the body is measured to be 25°C when found, Modeling thebody as a 30-cm-diameter, 1.70-m-long cylinder and the heat transfer coefficient estimated to be 8 W/m2·K. and using the lumped system analysis as a rough approximation, estimate the time of death of the person.
A supply of 50 kg of chicken at 6degC contained in a box is to be frozen to -18degC in a freezer. Determine the amount of heat that needs to be removed. The latent heat of chicken is 247 kJ/kg and its specific heat is 3.32 kJ/kg-degC above freezing and 1.77 kJ/kg-degC below freezing. The freezing temperature of the chicken is -2.8degC

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