The heat flux from a wall to air in motion having a heat transfer coefficient of 15 W/m². K and exposed to a temperature difference of 20 °C is O O O 225 W 300 W 250 W 375 W

Q2/ Consider a 1.2-m-high and 2-m-wide glass window whose thickness is 6 mm and thermal conductivity is k = 0.78 W/m. °C. Determine the steady rate of heat transfer through this glass window and the temperature of its inner surface for a day during which the room is maintained at 24°C while the temperature of the outdoors is 5°C. Take the convection heat transfer coefficients on the inner and outer surfaces of the window to be h1 = 10 W/m2 °C and h2= 25 W/m2 °C, and disregard any heat transfer by radiation.

It is desired to analyze heat transfer (or thermal load) and miscellaneous loadsfor a light work activity where there are 3 people in aresidential room located in the State of Durango, Santiago Papasquiaro, fordetermine the energy efficiency of the heating system in the heating seasonwinter, consider the interior temperature of the room to be 22 °C, and the coefficients ofindoor and outdoor heat transfer as 10 and 25 W/m2. °C respectively. Theroom has the following characteristics and electrical devices:

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