Re: [EnergyPlus_Support] Sizing of System

[Drury B Crawley <dbcrawley@xxxxxxxxx>]

It is better to use design conditions from Chapter 14 of 2009 ASHRAE Fundamentals.  If there are design data for that location, the .zip file will contain a .ddy file with that design data (design days).  Otherwise you will have to create design day objects with the data from ASHRAE.  You can read about design days in the ASHRAE document.

 

On Thu, Feb 10, 2011 at 8:17 AM, Shane Watson <mechenergy@xxxxxxxxx> wrote:

 

Hi everyone,

 

I am simulating a VAV system in an office building, Sizing of the system is done with weather file by using the objectSizing period:Weather file days. Is it a correct way to size the system on the weather file and let the software decide the design condtions. What impact it will have on the HVAC energy consumption.

 

Thanks in advance.

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