Q1: In a university there are two Air-conditioned class rooms these rooms required deferent condition. Room 1 is to be maintained at 18 C dry bulb temperature and 60% R. H. by supplying air at Co, whereas room 2 is to be maintained at 24 and 40% R. H. by supplying air at the same moisture content as required for room 1. There is a commune extract duct, the ratio of fresh outdoor air to rooms recirculated air be (1:2 or 1 to 2). Then the mixed air passes through a cooler coil which has a contact factor 0.9, then supplying to the rooms through separate heaters. The outdoor conditions.are To ns.are To 548 Co and 18% R. H. Room 1 and 2 has a concreate 20 cm thick walls. The two separate rooms dimensions (8*8*3) m and there are 2 m external wood doors and 4 m external single glass window. There are 1 kW lighting power and 48 persons in each room. All rooms directions are air-conditioned except west direction for room 1 and south direction for room 2. Determine: 1- The mass flow rate of the supplied air for each room. 2- Plot a clear free hand psychometric chart. 3- Obtain the cooler load. 4- Obtain the load of each heater. 324 70/100