Air System Sizing Summary for VAV Rooftop System Project Name: Manufacturing Office 10/21/2005
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1 Air System Sizing Summary for VAV Rooftop System 03:51PM Air System Information Air System Name: Air System Type: Sizing Calculation Information Calculation Months: VAV Rooftop System VAV May to Nov Number of zones: 7 Floor Area: sqft Location: St. Louis IAP, Missouri Central Cooling Coil Sizing Data Total coil load: 13.9 Tons Total coil load: Sensible coil load: Coil airflow: 3759 Sensible heat ratio: Area per unit load: sqft/ton Load per unit area: 27.9 BTU/(hr-sqft) Preheat Coil Sizing Data Max coil load: 9.5 Coil airflow: 1280 Max coil airflow: 3759 Supply Fan Sizing Data Actual max airflow: 3759 Standard airflow: 3668 Actual max airflow per unit area: 0.63 /sqft Outdoor Ventilation Air Data Design airflow: 1280 Airflow per unit floor area: 0.21 /sqft Load occurs at: Jul 1500 OA DB / WB: 95.0/76.0 F Entering DB / WB: 83.1/67.6 F Leaving DB / WB: 53.6/52.6 F Coil ADP: 51.0 F Bypass Factor: Resulting RH: 45 % Design supply temp: 55.0 F Load occurs at: Des Htg Ent DB / Lvg DB: 43.0/50.0 F Fan motor BHP: 2.19 BHP Fan motor kw: 1.63 kw Fan static: 2.00 in wg Airflow per person: /person Zone Sizing Data Zone Name Cooling Sensible Design Airflow Minimum Air Flow Time of Peak Load Heating Load Zone Floor Area sqft Zone /sqft Reheat Coil Load 1 Conference Room Jul Assistant manager Jul Manager Aug General Perimeter Sep Chief Engineer Aug Engineering Jul General Core Jul
2 System Design Load Summary for VAV Rooftop System 03:53PM DESIGN DESIGN HEATING DATA AT Jul 1500 OA DB / WB 95 F / 76 F HEATING DATA AT DES HTG HEATING OA DB / WB -6 F / -7.2 F ZONE LOADS Details Sensible Latent Details Sensible Latent Window and Skylight Solar Loads 504 sqft sqft - - Wall Transmission 2087 sqft sqft Roof Transmission 6000 sqft sqft Window Transmission 504 sqft sqft Skylight Transmission 0 sqft 0-0 sqft 0 - Door Loads 49 sqft sqft Floor Transmission 6000 sqft sqft Partitions/Ceilings 850 sqft sqft Overhead Lighting 9000 W W 0 - Electric Equipment 2100 W W 0 - People Infiltration Miscellaneous Safety Factor 0% / 0% 0 0 0% 0 0 >>Total Zone Loads Thermostat and Pulldown Adjustment Plenum Wall Load 0% Plenum Roof Load 0% Plenum Lighting Load 0% Ventilation Load Supply Fan Load >> Total System Loads Central Cooling Coil Preheat Coil Terminal Reheat Coils >> Total Coil Loads Key: Positive values are clg loads Negative values are htg loads Positive values are htg loads Negative valuees are clg loads
3 System Psychrometrics for VAV Rooftop System 03:56PM Location: St. Louis IAP,Missouri Altitude: 673 Data for: Jul DESIGN DAY, Mixed Air 3. Central Cooling Coil Outlet 4. Supply Fan Outlet 5. Room Air Specific Humidity ( lb/lb ) Temperature (F)
4 Ventilation Sizing Summary for VAV Rooftop System 04:01PM Summary Ventilation Sizing Method: ASHRAE Std Design Ventilation Airflow Rate: 1985 Uncorrected flow Rate: 1280 ASHRAE Std 62 Analysis Details Critical Space: 1 Conference Room Critical Space Fraction (Z): Uncorrected Fraction (X): Corrected Fraction (Y): System Ventilation Airflow: 1985 Space Ventilation Analysis Table Zone Name Floor Area sqft Occupants Supply Air /person /sqft (% of supply) Uncorrected Uncorrected Ratio (Z) Corrected 1 Conference Room Assistant manager Manager General Perimeter Chief Engineer Engineering General Core Totals
5 Hourly Air System Design Day Loads for VAV Rooftop System 03:57PM Hour OA TEMP F SUPPLY AIRFLOW SENSIBLE DESIGN MONTH: Jul TOTAL HEATING COIL PREHEAT COIL TERMINAL COILS TERMINAL HEATING COILS
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