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Re: [EnergyPlus_Support] ConductionFiniteDiffer ence Algorithm in E+ V7




That is a severe but the simulation continues.

If yours crashed, please send to the helpdesk.

On Mon, 16 Jan 2012 18:29:31 -0800 (PST), saleh saadi wrote:
Dear EnergyPlus Users,

I'm having both E+ V6 and V7 on my machine.

I used the ConductionFiniteDifference (CDF) algorithm in E+ V6 at a
time step of 1 (i.e. 1 hr) and compared it to my own code that I have
developed. E+ plus V6 gives results that are comparable to the CTF
algorithm even at a time step of 1. This is still work!!.

However, the V7 gives an error when the time step is 1(i.e. 1 hr) when
I selected CDF algorithm . It looks like that we are forced to use a
time step more than 20 (i.e. less than 3 minutes) to get a reasonable
results. I did use time step of 20 as recommended by E+ manual and it
worked. However, I need to know if V7 does not support that any more
especially Crank-Nicholson scheme (implicit+explicit) is added
recently.

Regards,
Saleh NJ AL-Saadi
University of Colorado at Boulder
Department of Civil, Environmental and Architectural Engineering

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