[esp-r] Re: Time steps

[wakana-m at ec.hokudai.ac.jp]

Dear Jon Hand,

Thank you always for your help.

I study about ceiling radiation cooling system.
My model includes a radiation panel which is very thin and the panel is 
controlled.
I'd like to flow water in the panel zone.
I couldn't make water flow network, then I changed the convection 
coefficient.
Now the convection coefficient of panel is equivalent of water.
The results aren't sometimes calculated.
I think the reason of the error is that the calculation diverged.
Therefore I tried to shorten time-steps.  
If there are other good ways, please let me know.

If I try to simulate on a second basis, what should I change?
In simulator, there is "time-step controllers".
Is this related to time-steps?

Best Regards,

Wakana Matsumoto

----- Original Message -----
> 
> The building part of the simulation is currently limited to a one 
minute frequency.  If
> the model includes system components the system side can be assessed 
at  a higher
> frequency up to ~1 second.  We normally assume that the building is 
not so sensitive
> to time below a minute but the system components and electrical 
components might
> change state more frequently.
> 
> What (object) are you attempting to simulate where sub-minute 
timesteps are needed?
> 
> -Jon Hand
> ________________________________________
> From: esp-r-bounces at lists.strath.ac.uk [esp-r-bounces at lists.strath.ac.
uk] On Behalf Of wakana-m at ec.hokudai.ac.jp [wakana-m at ec.hokudai.ac.jp]
> Sent: 05 December 2012 09:11
> To: esp-r at lists.strath.ac.uk
> Subject: [esp-r]  Time steps
> 
> Dear all,
> 
>  Hello.
>  I'm a graduate student in Japan.
>  I want to know how to simulate on a second basis.
> 
>  Until now, I've simulated on a minute basis.
>  I've input "60/1" in the initiate simulation window.
>  Now I try to simulate on a second basis.
>  However the input value for 'time-steps/hour' should be less than 60.
>  Thus, how can I do if I want to simulate the model by seconds ?
> 
>  Any advice would be appreciated.
> 
>  Regards,
> 
>  Wakana Matsumoto
> 
> 
> 
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