2. Calculate the sensible heat load produced from leakage of cold air with temperature of -6 °C to warm room at temperature of 22 °C through Aluminium window with dimension of 1.2 x 2 m using crack method. The window has two moving frames on both sides with wide of 0.5 m for each one and one fixed glass peace in the middle with width of 1 m. At wind speed of 14 km/h, the amount of leaked air from the window is 0.77x10°³ m³/s.m. (0.197 kW) 3. Calculate the cooling load produced from heat transfer by conduction to a building due to face a wall with area of 18 m² to sun ray. The overall heat transfer coefficient is 0.52 W/m²K. The difference between inside and outside temperatures is 40 K. 4. A first floor of three floors house consists of three rooms. 2 persons stay in each room. Each person exerts 50 W sensible heat gain and 60 W latent heat gain. The area of each wall is 4x9 m². The west and south walls are adjusted to another air conditioned building. The two other walls are side-street and have two windows each of 2x1 m. The overall heat transfer coefficient through the wall is 12 W/m²K. The lighting intensity is 16 W/m². The roof area is 9x9 m². The heat transfer coefficient through the roof and floor is 20 W/m²K. The fresh air required per person is 10 L/s. There is a computer in each room with 85 W sensible heat. Assume the design conditions are as follows: the indoor air conditions are 24 °C dry bulb temperature and 55% relative humidity. The outdoor air conditions are 45 °C dry bulb temperature and 60% relative humidity. The ground temperature is 10 °C less than the outdoor air temperature. Calculate the total cooling load.