(3-18) A volumetric flow rate of 3,250 m³/h of outside air at 36 °C db and 25 °C wb temperatures is mixed with 9,500 m³/h of return air at 25 °C and 50% relative humidity. The mixture passes through a cooling coil such that the supply air leaving the coil is at 90% relative humidity. The SHR of the conditioned space is 0.70. Sketch the process on the psychrometric chart and find the followings: a- Apparatus dew point temperature and air dew point temperature. b- Dry bulb temperature of the supply air. c- Cooling capacity of the cooling coil. d-Sensible and latent heat loads of the space. (3-22) A summer air conditioning unit consists of a cooling coil and a dehumidification device. The conditioned space has a sensible heating load of 17.6 kW and a latent load of 5.86 kW. The space is maintained at 21 °C and 40% relative humidity. Outside air is mixed with the return air such that infin, 1/10. The outside air enters the unit at 35 °C and 40% RII. The air leaves the dehumidification device at 100% RH. Sketch the process on the psychrometric chart and calculate the followings: a- Temperature of supply air. b- Mass flow rates of supply air and condensate water. c. Capacity of the cooling coil. d- Apparatus dew point temperature and bypass factor of the cooling coil. (4-22) The acetone (CHO) release in a given factory is estimated as 0.01m³/h. Calculate the volumetric flow rate of ventilation air required to control the acetone within its threshold limit value. Assume that the ventilation air does not contain acetone. (3-22) A summer air conditioning unit consists of a cooling coil and a dehumidification device. The conditioned space has a sensible heating load of 17.6 kW and a latent load of 5.86 kW. The space is maintained at 21 °C and 40% relative humidity. Outside air is mixed with the return air such that infin, 1/10. The outside air enters the unit at 35 °C and 40% RII. The air leaves the dehumidification device at 100% RH. Sketch the process on the psychrometric chart and calculate the followings: a- Temperature of supply air. b- Mass flow rates of supply air and condensate water. c. Capacity of the cooling coil. d- Apparatus dew point temperature and bypass factor of the cooling coil.