A concrete wall, which has a surface ar area that 20 m2 and is 0.30 m thick, the end conditioned room waiting from ambient air. The temperature the the inner surface of the wall is maintained at 25°C, and the thennal conductivity that the concrete is 1 W/m. K.
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(a) recognize the heat loss with the wall surface for external surface temperatures varying from - 15°C to 38°C,which exchange mail to winter and summer extremes, respectively. Display screen your results graphically.
(b) On your graph. Also plot the heat loss together a function of the external surface temperature for wall surface materials having actually thermal conductivities that 0.75 and also 1.25 W/m . K. Describe the family members of curve you have actually obtained.
A concrete wall through a surface area of 20 m 2 and a thickness of 0.30 m separates conditioned room air from ambient air. The temperature of the inner surface of the wall (T 1 ) is maintained at 25°C. (a) Determine the heat loss Q (W) through the concrete wall for 3 thermal conductivity values... See Answer
A huge Styrofoam cooler has a surface area of 1.0 m2 and a thickness of 2.5 cm. If 5.0 kg of ice cream at 0oC is stored inside and the external temperature is a continuous 35oC, how long go it take it for every the ice cream to melt? (Consider conduction only.) watch Answer
A black wood range has a surface area of 1.20 m2 and a surface temperature of 175°C. What is the net rate at which heat is radiated into the room? The room temperature is 20°C. View Answer
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A usual adult ear has a surface area of 2.1 × 10 ?3 m 2 . The sound intensity during a regular conversation is around 3.2 × 10 ?6 W/m 2 at the listener’s ear. Assume that the sound strikes the surface of the ear perpendicularly. Exactly how much power is intercepted by the ear? check out Answer
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The thermal conductivity of a paper of rigid, extruded insulation is report to be k = 0.029 W/m. K. The measured temperature difference across a 20-mm-thick sheet of the product is T1 - T2 = 10°e. (a) What is the heat flux through a 2 m X 2 m paper of the insulation? (b) What is the price of... Watch Answer
The concrete slab of a basement is 11 m long, 8 m wide and 0.20 m thick. During the winter, temperatures space nominally 17°C and 10oC at the optimal and bottom surfaces, respectively.
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