(III) Suppose the insulating qualities of the wall of a housecome mainly from a 4.0-in.layer of brick and an R-19layer of insulation, as shownin Fig. 14–19. What is the totalrate of heat loss through T,such a wall, if its total area is195 ft? and the temperatureBrick Insulation(R¡)(R2)T1Heatflowdifference across it is 35 F°?FIGURE 14–19Problem 45. Two layersinsulating a wall.

R value of the brick is Thermal conductivity of brick is 0.84 J/m·s°C R=lk=4 in0.84…

Answered: (III) Suppose the insulating qualities…

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 composite structural wall having a thermal conductivity of 0.3 W/mK and a thickness of 100 mm is being replaced by a concrete wall having thermal conductivity 0.9 W/mK. If the heat rate is to be 80% of the heat rate through the composite wall, the wall thickness (in mm) required for concrete wall is. Assume both walls are subjected to the same surface temperature difference.
10-What is the maximum temperature is aplane wall 8 cm thick in which that is generated uniformally at the rate 1000 W/m3 >>If one side is maintained at 20 C and the other side at 100 C ..Kw=1.5 W/mC.
! * The thermal conductivity of a sheet of rigid, extruded insulation is reported to be k= 0.029 W/m. K. The measured temperature difference across a 20-mm-thick sheet of the material is T1 T2 = 10°C. The heat flux and heat rate through a 2 m x 2 m sheet of the insulation is 16.5 W/m² and 68 W Option 1 14.5 W/m² and 29 W www. Option 2
There is a 1.20-cm-thick stagnant air pocket. A) What thickness of cork would have the same R-factor as the stagnant air pocket? The thermal conductivity of air is 0.0230 W/m·K and of cork is 0.0460 W/m·K.in cm B) What thickness of tin would be required for the same R-factor as a 1.20-cm-thick stagnant air pocket? The thermal conductivity of air is 0.0230 W/m·K and of tin is 66.8 W/m·K . in m i asked how to do this but got the wrong soloution
A thermal power plant of 800 MW capacity burns 50 T of coal/MW/day. Assume complete combustion of carbon compounds. During the burning process, the power plant has the following information: C content in coal = 40% (wt/wt); Temperature on stack = 2000C; Pressure in stack = 1.2 atm; Stack exit velocity = 30 m/sec; Diameter of the stack = 20 m. Estimate CO2 emission in Kg/d, mg/Am3, mg/Nm3 and ppm based on NTP? %3D Need Asap
1) A wall section composed from the outside to inside, of concrete brick 100mm thick, an air space of 50mm, two layers of fiberglass insulation 38mm thick, concrete block 150mm thick and air space of 19mm and a gypsum board of 13mm. The exterior conditions are -20C and RH=90% while the interior conditions are 23C and RH=40%. The surface temperature from the outside to inside are shown in the figure. The permeances are: Still Air: µ = 175 ng/pa.s.m Fiber glass: M=2560 ng/pa.s.m? Concrete block: M= 200 ng/pa.s.m? Gypsum board: M= 2000 ng/pa.s.m? Concrete brick: µ = 4.55 ng/pa.s.m Determine if there is a risk of condensation, and if there is, what is the condensation rate? What would happen if a vapor barrier (M=0.2 ng/pa.s.m²) was installed on the warm side of the insulation (Surface 4). 21с 19C 16 С 12C -10 -15C -18C -19C Gyp Air Concrete Fiber Fiber Air Concrete Outdoor Indoor sum block Glass Glass brick 230 19 50 mm -20C 13 150 mm 38 mm | 38 mm 100 mm RH=90% RH=40% mm mm Surf. 1 Surf.…
Calculate the heat loss through a 100-ft² wall with an inside temperature of 65°F and an outside temperature of 35°F. Assume the exterior wall is composed of 2- in. of material having a 'k' factor of 0.80, and 2-in. of insulation having a conductance of 0.16. RTotal = 8.75 & Q = 342-Btu/hr RTotal = 9.2 & Q = 399-Btu/hr RTotal = 8.75 & Q = 399-Btu/hr RTotal = 9.2 & Q = 342-Btu/hr Hide hint for Question 3 Utilize the (RTotal = 1/C + x1/k1) equation.
As2 Calculate the temperature 7 cm into the mineral wool layer from the warm side measured in one wall that is built from the outside in according to the following material layers: Wood panel ventilated R = 0.20 m2K / W Mineral wool 200 mm λ = 0.033 W / mK Plastic foil R ≈ 0 m2K / W Plasterboard 13 mm λ = 0.22 W / mK The temperature outside is -10 ◦C and inside 22 ◦C. The heat transfer resistors are on the inside Rsi = 0, 13 and on the outside Rse = 0, 04 m2K / W
I JUST NEED HELP WITH THE RED MARKED AREAS, THANKS!
One vessel having a carbon-steel wall of thickness 5 mm carrying saturated steam and water at 423K. The vessel is insulated with magnesia of thickness 50 mm. If the ambient air temperature is 321 K, determine the heat loss from the vessel. Given: i. thermal conductivity of carbon steel is 52 W/m.K ii. thermal conductivity of magnesia is 0.5 W/m.K iii. surface coefficient of insulation surface is 3 W/m2.K

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