Section 1 1- An air conditioning system working in the summer is shown in Figure 1. Please respond to the following questions using the psychrometric chart (with Pam 101.325 kPa). a) Show the psychrometric properties of all the points in Figure 1 (complete Table 1). Outdoor air (OA) Mixed air Air handling unit (MA) Supply air (SA) Return air (RA) Zone Exhaust air (EA) Table 1: Deliverable submission deadline Specific Twb Tdp W Enthalpy Name volume (C) (C) (C) (g/kg da) (%) (kJ/kg) (m/kg) OA 32 MA 29 SA 60 65 6 34 RA 20 16.5 b) How can you decrease relative humidity of the MA, while keeping moisture content constant? c) Find the quantity of latent and sensible enthalpy of the air at RA. d) Find the saturated vapor pressure (Pws (kPa)) at OA, when the Pat is at sea level and once when Pat is 90 kPa. Note, the moisture content is related with vapor pressure (Pw (kPa)) by the following equation: g=0.622 x Pw Pat-Pw e) What is the increase in the amount of enthalpy if the SA is humidified to 65%? f) What is the lowest RH in the MA if the cooling coil in the air handler unit must always be above 5C to avoid condensation? g) Show the following processes on the chart: a. Cooling and dehumidification from MA to SA b. Mixing of RA and OA