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 8 Air Handler#2 - RTU-2 - Total Load Summar Air Handler Description: RTU-2 Variable Air Volume Supply Air Fan: Draw-Thru with program estimated horsepower of 0.74 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: 3pm in August. Outdoor Conditions: Clg: 81' DB, 66° WB, 71.66 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 4pm is different from the total system peak time, hence the air system CFM was computed using a room sensible load of 19,598. Summer: Ventilation controls outside air, ----- Winter: Ventilation controls outside air. Room Space sensible loss: 9,537 Btuh Infiltration sensible loss: 0 Btuh 0 CFM Outside Air sensible loss: 9,166 Btuh 167 CFM Supply Duct sensible loss: 908 Btuh Return Duct sensible loss: 454 Btuh Return Plenum sensible loss: 0 Btuh Total System sensible loss: 20,066 Btuh Heating Supply Air: 10,446 / (.999 X 1.08 X 23) = 421 CFM Winter Vent Outside Air (39.6% of supply) = 167 CFM Room space sensible gain: 19,177 Btuh Infiltration sensible gain: 0 Btuh Draw-thru fan sensible gain: 1,885 Btuh Supply duct sensible gain: 1,534 Btuh Reserve sensible gain: 0 Btuh Total sensible gain on supply side of coil: 22,597 Btuh Cooling Supply Air: 23,018 / (.999 X 1.1 X 15) = 1,396 CFM Summer Vent Outside Air (11.9% of supply) = 167 CFM Return duct sensible gain: 676 Btuh Return plenum sensible gain: 0 Btuh Outside air sensible gain: 2,014 Btuh 167 CFM Blow-thru fan sensible gain: 0 Btuh Total sensible gain on return side of coil: 2,689 Btuh Total sensible gain on air handling system: 25,286 Btuh Room space latent gain: 2,560 Btuh Infiltration latent gain: 0 Btuh Outside air latent gain: 686 Btuh Total latent gain on air handling system: 3,246 Btuh Total system sensible and latent gain: 28,533 Btuh Check Figures Total Air Handler Supply Air (based on a 150 TD): 1,396 CFM Total Air Handler Vent. Air (11.93% of Supply): 167 CFM Total Conditioned Air Space: 1,443 Sq.ft S:\Engineering\Chvac 8 Projects\Maritime Institute.CH8 Monday, October 23,2023,01:54 PM