Dear Jeannie,
Room temp setpoint - Central cooling design supply air
temperature = 11.1C
The Building Performance Team
James V. Dirkes II, P.E., LEED AP
1631 Acacia Drive NW
Grand Rapids, MI 49504
616 450 8653
From: EnergyPlus_Support@xxxxxxxxxxxxxxx
[mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of jeannieboef
Sent: Tuesday, August 31, 2010 7:31 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] G3.1.2.8 Design Airflow Rates -
Sizing:System
I'm required to size my system so that the "System
design supply airflow rates for the baseline building design shall be based on
a supply-air-to-room-air temperature difference of 11°C or the required
ventilation air or makeup air, whichever is greater."
I'm looking at:
Sizing:System,
118129 AHU, !- AirLoop Name
Sensible, !- Type of Load to Size On
autosize, !- Design (minimum) outside air volumetric flow rate {m3/s}
1, !- Minimum System Air Flow Ratio
7, !- Preheat design set temperature {C}
0.008, !- Preheat design humidity ratio {kg-H2O/kg-air}
11, !- Precool design temperature {C}
0.008, !- Precool design humidity ratio {kg-H2O/kg-air}
12, !- Central cooling design supply air temperature {C}
50, !- Central heating design supply air temperature {C}
NonCoincident, !- Sizing Option
No, !- 100% Outdoor Air in Cooling
No, !- 100% Outdoor Air in Heating
0.008, !- Central cooling design supply air humidity ratio {kg-H2O/kg-air}
0.008, !- Central heating design supply air humidity ratio {kg-H2O/kg-air}
DesignDay, !- Cooling Design Air Flow Method
0, !- cooling design air flow rate {m3/s}
DesignDay, !- Heating Design Air Flow Method
0; !- heating design air flow rate {m3/s}
Should I specify the design air delivery temperature so that it differs from
the design day outdoor dry bulb temperature by 11°?
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