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(4-16) An auditorium seats 1,500 person. The inside design conditions are 26 °C db and 17°C wb. The outside dry bulb temperature is 35ºC and the RH is 50%. The heat gain from walls, floor, roof, windows, and doors is 35 kW. Estimate the following: (a) Volumetric flow rate of ventilation air required. (b) Total heat load due to occupants for evening show, assuming (CLF) c = 0.76. (c) Relative humidity and vapor pressure inside the auditorium. (d) Maximum relative humidity allowed if dry bulb temperature is maintained at 26 °C. (e) Sensible heat ratio of the auditorium. (4-17) A lecture room is occupied by 60-students. The inside dry and wet bulb temperatures are 24 and 18°C, respectively. Find the inside relative humidity and state whether the inside conditions fall in the comfort zone or not for winter and summer operation. (4-18) A space is supplied with 75 m/h of outside ventilation air. The outside air contains 0.03 ppm of CO2. The carbon dioxide generation inside the space is 0.02m/h. Find the amount of CO2 that exists inside the space in mg/m' and in ppm. (4-19) An office building is occupied by 1,000-person. The building is maintained at 25 °C db and 20 °C wb. Find the followings: (a) Relative humidity, humidity ratio and dew point temperature that corresponds to the given inside design conditions. (b) State whether the inside design conditions fall in the comfort zone or not for summer air conditioning. If not, determine the maximum value of relative humidity for the inside conditions to fall inside the comfort zone while keeping the dry bulb temperature at 25°C. (c) Sensible and latent heat gains due to the occupant. Take (CLF)oc. = 0.86 (d) Mass flow rate of moisture due to the occupants that must be removed at 25 °C. (4-20) A theater seats 250-person. The inside design conditions are 25 °C and 50% RH, while the outside conditions are 40 °C and 40% RH. The heat gain from walls, ceiling, floor, windows, and doors is 28 kW. Calculate the followings: (a) Total heat gain due to occupants for matinee show, assuming (CLF)oc. = 0.76. (b) Mass flow rate of ventilation needed. (e) Total sensible and latent heat gains.