[EnergyPlus_Support] Re: G3.1.2.8 Design Airflow Rates - Sizing:System

["jeannieboef" <jeannieboef@xxxxxxxxx>]

Aaahh! Great. Thanks.

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "James V Dirkes II, PE" <jvd2pe@...> wrote:
>
> 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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