Engineering, 07.03.2020 04:44 holamigosss

A tile-iron consists of a massive plate maintained at 150 degrees Celsius by an embedded electrical heater. The iron is placed in contact with a tile to soften the adhesive allowing the tile to be easily lifted from the subflooring. The adhesive will soften sufficiently i heated above 50 degrees celsius for at least 2 minutes, but its temperature should not exceed 120 degrees Celsius. Assume the tile and subfloor to have an initial temperature of 25 degrees Celsius and to have equivalent thermophysical properties of k = .15 W/mK and (rhoc_p) = 1.5 10 ^ J/m^3K. a) How long will it take a worker using the tile-iron to lift a tile? Will the adhesive temperature exceed 120 degrees C?b) If the tile-iron has a square surface area 254mm to the side, how much energy has been removed from it during the time it has taken to lift the tile?

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A tile-iron consists of a massive plate maintained at 150 degrees Celsius by an embedded electrical...

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