A 1.0 m × 1.5 m double glazed window consists of two 4 mm thick glass (k = 0.78 W / m K) layers separated from each other by a 5 mm air gap (khava = 0.025 W / m K). It is assumed that the heat flow in the air gap is by conduction. Indoor and outdoor air temperatures are 20oC and -20oC, respectively, and the heat transfer coefficients inside and outside are 40 W / m2 K and 20 W / m2 K. (a) The rate of heat loss occurring in the window in continuous operation. (b) Find the temperature difference at the greatest thermal resistance.

Q: The outside wall of a building consists of an inner layer of gypsum plaster, k = 0.17 W/ m K and 1.5…

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Q: Explain and write legibly

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Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.