1130 W MARINE VIEW DR MARITIME INSTITUTE 2024-06-24

Chvac-Full Commercial HVAC Loads Calculation Program Elite Software Development,Inc. Pacific Air Control, Inc. Maritime Institute Bothell WA 98021 A Pa e 5 Air Handler#1 - RTU-1 - Total Load Summar Air Handler Description: RTU-1 Constant Volume - Proportion Supply Air Fan: Draw-Thru with program estimated horsepower of 1.07 HP Fan Input: 65% motor and fan efficiency with 2.2 in. water across the fan Sensible Heat Ratio: 0.90 --- This system occurs 1 time(s) in the building. --- Air System Peak Time: 2pm in September. Outdoor Conditions: Clg: 79° DB, 66° WB, 74.42 grains, Htg: 21' DB Indoor Conditions: Clg: 70° DB (avg.), 60% RH, Htg: 720 DB Because of the diversity in room, plenum and ventilation loads, the room sensible peak time in July at 3pm is different from the total system peak time, hence the air system CFM was computed using a room sensible load of 28,204. Summer: Ventilation controls outside air, ----- Winter: Ventilation controls outside air. Room Space sensible loss: 15,074 Btuh Infiltration sensible loss: 0 Btuh 0 CFM Outside Air sensible loss: 12,291 Btuh 223 CFM Supply Duct sensible loss: 1,436 Btuh Return Duct sensible loss: 718 Btuh Return Plenum sensible loss: 0 Btuh Total System sensible loss: 29,519 Btuh Heating Supply Air: 16,510 / (.999 X 1.08 X 23) = 665 CFM Winter Vent Outside Air (33.6% of supply) = 223 CFM Room space sensible gain: 27,742 Btuh Infiltration sensible gain: 0 Btuh Draw-thru fan sensible gain: 2,713 Btuh Supply duct sensible gain: 2,208 Btuh Reserve sensible gain: 0 Btuh Total sensible gain on supply side of coil: 32,664 Btuh Cooling Supply Air: 33,126 / (.999 X 1.1 X 15) = 2,009 CFM Summer Vent Outside Air (11.1% of supply) = 223 CFM Return duct sensible gain: 981 Btuh Return plenum sensible gain: 0 Btuh Outside air sensible gain: 2,209 Btuh 223 CFM Blow-thru fan sensible gain: 0 Btuh Total sensible gain on return side of coil: 3,191 Btuh Total sensible gain on air handling system: 35,854 Btuh Room space latent gain: 3,520 Btuh Infiltration latent gain: 0 Btuh Outside air latent gain: 1,409 Btuh Total latent gain on air handling system: 4,929 Btuh Total system sensible and latent gain: 40,783 Btuh Check Figures Total Air Handler Supply Air (based on a 150 TD): 2,009 CFM Total Air Handler Vent. Air (11.12% of Supply): 223 CFM Total Conditioned Air Space: 1,889 Sq.ft S:\Engineering\Chvac 8 Projects\Maritime Institute.CH8 Monday, October 23,2023,01:54 PM