Ventilation Air Flow = 950.8/.071 = 13,391 CFMįor multiple packages installed in a room, add up the heat load from each package and piping losses to calculate required ventilation flow. see pressure, thermal radiation, 16, 44, 72, 253 ram, see pressure. Package Heat Loss = 8.48*100= 848 Btu/Min see also T Tauri stars precipitation, 195 acceleration, 188 atmospheric heating. Package noise guarantee does not include noise from the external inlet/discharge piping supplied by others.Įxample- Ventilation Air Flow Determination It is also recommended that the exposed discharge piping be lagged with insulation to reduce noise inside the building.

On vacuum service, do not discharge blower exhaust inside the building, pipe the exhaust to the outside. Piping heat loss could be reduced by lagging the piping with insulation. If outside temperature exceeds 100✯, special motor insulation will be required. Room ventilation system should be sized to keep the room temperature no more than 5✯ above maximum outside temperature of 100✯. V= Ventilation air flow in CFM = W/ ρ, where ρ is air density in Lb/Cubic Ft Δt= Room temperature rise above outside temperature in ☏ T2 = Piping surface temperature in RankineĬp= Specific heat for air =. PHL= Piping heat loss in Btu/Min= A*Y*( T 2 4– T 1 4)

The discharge piping inside the building will radiate heat inside the room. PKHL=Package Heat Loss in Btu/Min = 0.2*Motor HP*42.4 =8.48*Motor HP This consists of motor heat loss, V-belt loss, blower radiation loss, silencer radiation loss and heat radiated from accessories. The package will reject about 15 to 20% of the motor BHP into the building. Inadequate or lack of room ventilation will create excessive temperatures around the blower or vacuum pump, motor and accessories leading to equipment failure.

When a positivie displacement blower or vacuum pump package are installed inside a building, the following factors must be considered for the design of the room ventilation system.

Radiative ram pressure heating