Re: [EnergyPlus_Support] error in drawing file

[Lixing Gu <gu@xxxxxxxxxxxx>]

Neslihan:

2) Discharge coefficient

The discharge coefficient is between 0 and 1. Could you let me know how you 
obtain the value above one? Do you have math and physics to support?

 3- What is 'mass flow exponent when the opening is closed'?
Here is definition extracted on page 633 from Input Output Reference:

Field: Air Mass Flow Exponent When Opening Is Closed
Crack flow is assumed when the window or door is closed. In this case, the 
value of this field is the exponent, n, in the crack air flow equation. The 
valid range for this exponent is 0.5 to 1.0, with the default value being 
0.65.

When the opening is closed, the model treats the opening equivalent to a 
crack. Air mass flow coefficient and flow exponent are used to calculate 
airflow across an opening: Mass flow rate = Air Mass Flow Coefficient * 
(dP)^Air Mass Flow Exponent.

Thanks.

Lixing


----- Original Message ----- 
From: "neslihanturkmenoglu" <neslihanturkmenoglu@xxxxxxxxx>
To: <EnergyPlus_Support@xxxxxxxxxxxxxxx>
Sent: Tuesday, February 05, 2008 7:55 AM
Subject: [EnergyPlus_Support] error in drawing file


> Hi Lixing
> I had uploaded my file on Feb 3,2008 for which I had questions, hoping
> to be answered by you:)But I forgot to ask others.
> My first other question is; why does ofis zone2 floor and roof seem
> larger in the drawing? My coordinates are true.
>
> 2- input /output reference book tells discharge coefficient values
> must be between 0-1. In my example for front large opening I calculated
> discharge coefficient values greater than 1. So how am I supposed to
> enter my own values.
> 3- What is 'mass flow exponent when the opening is closed'?
>
>
> Thank you very very much.
>
>
>
>
> The primary EnergyPlus web site is found at:
> http://www.energyplus.gov
>
> The group web site is:
> http://groups.yahoo.com/group/EnergyPlus_Support/
>
> Attachments are not allowed -- please post any files to the appropriate 
> folder in the Files area of the Support Web Site.
>
> EnergyPlus Documentation is searchable.  Open EPlusMainMenu.pdf under the 
> Documentation link and press the "search" button.
>
> Yahoo! Groups Links
>
>
>
> 



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