A big hall is to be air conditioned to maintain an inside condition of 25C and...

 

Transcribed Image Text:

A big hall is to be air conditioned to maintain an inside condition of 25°C and 50% relative humidity. The seating capacity is 600 persons. Heat gain from building is 220 kW, lighting 12 kW, sensible heat from person 58 Watt and 87 Watt latent, fresh air must be 1 m³/min/person. Fresh air is mixed with return air before entering the cooling coil. Outside air temperature is 37°C dbt and 26°C wbt, air leaving the cooling coil at 14°C dbt. Find: a. Air flow rate entering the cooling coil. b. Relative humidity of air leaving the cooling coil. c. Apparatus dew point d. Cooling coil capacity. e. Moisture removed through cooling coil per hour. f. Moisture added through conditioned space per hour. g. By-pass factor and contact factor of the cooling coil. h. Ventilation load. 1. Number of cooling coil rows. A big hall is to be air conditioned to maintain an inside condition of 25°C and 50% relative humidity. The seating capacity is 600 persons. Heat gain from building is 220 kW, lighting 12 kW, sensible heat from person 58 Watt and 87 Watt latent, fresh air must be 1 m³/min/person. Fresh air is mixed with return air before entering the cooling coil. Outside air temperature is 37°C dbt and 26°C wbt, air leaving the cooling coil at 14°C dbt. Find: a. Air flow rate entering the cooling coil. b. Relative humidity of air leaving the cooling coil. c. Apparatus dew point d. Cooling coil capacity. e. Moisture removed through cooling coil per hour. f. Moisture added through conditioned space per hour. g. By-pass factor and contact factor of the cooling coil. h. Ventilation load. 1. Number of cooling coil rows.