Question 4 5 points Saved Calculate the thermal resistance R-value R - - Σ' of the composite wall shown below. The wall has an area of 8.25m2. The wall is made of a concrete layer, an insulation layer and a brick layer with dimensions shown. The inside (left) surface temperature of the wall is 22ºC and the outside (right) surface temperature of the wall is -16°C. The thermal conductivity of concrete is 1.22 W/mK, the thermal conductivity of the insulation layer is 0.160 W/mK and the thermal conductivity of brick is 0.68 W/mK 9 Concrete ulation Brick Layer 70mm 30mm 125mm U- Overall heat transfer coefficient (U-value) k - The thermal conductivity of the ith section of the wall *. The thickness of the th section of the wall O 0.4287 m2KW 8.4.287 m2kW -0.04287 m2kW D 2.3326 m2K/W
Saved Question 5 5 points Which of the following statements is wrong? A "Superheated vapour" is vapour which has been over-heated above 100°C. B."Saturated vapour" is a vapour at its saturation point Saturated vapour becomes superheated if more heat is added, and becomes condensed to saturated liquid if heat is removed. OC. "Compressed liquid" is a liquid that in its heating process is still below the saturation point and is not about to vapourise. D."Saturated liquid" is a liquid that has reached its saturation point and is about to vapourise.
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