[esp-r] Re: Infinite Loop

[Achim Geissler]

O.K., to summarise, the constructions should not really be an issue / have a problem. You get plausible results for simulations prior to hour 2184. You do not have any control. You tried with more than one climate file.

Possible further issues that come to mind:
- is the location used correct for the climate file (possible problems with “solar w/o sunup”, however, this usually does not lead to infinite loops)
- simulation time step (possibly try shorter time steps. For whatever reason, the .cfg seems to say 1 hour steps (10 for plant, but there is no plant). Maybe try 10 ts for the building
- … ? no idea.

If you are not prepared to make the whole model available, I’m afraid I have no further ideas.

Good luck.

Best
Achim


> On 26 Apr 2018, at 18:40, Paul <paulnee at xplornet.com> wrote:
> 
> Thank you for the reply.
> 
> The east, north and west walls, floor, and roof are 100mm foam, 100mm foam and 200mm concrete from the outside to the inside respectively. The south wall and ceiling are material tripglz_089 glass which has layers of thickness 6mm, 12mm, 6mm, 12mm, 6mm respectively.
> 
> Thanks,
> 
> Paul
> 
> 
> On 2018-04-26 05:54 AM, Achim Geissler wrote:
>> Dear Paul,
>> 
>> when I hear green house, what are your constructions. One possible problem is a construction with too little thermal mass - that may lead to numerical issues, possibly when solar radiation gets higher (“spring”) and temperatures are still low. What are your constructions? Any very thin layers?
>> 
>> Best
>> Achim
>> 
>>> On 25 Apr 2018, at 20:13, Paul <paulnee at xplornet.com> wrote:
>>> 
>>> Thank you for your reply.
>>> 
>>> There  are no controls defined.
>>> 
>>> Your are correct about a short simulation. It still loops with a short sim.
>>> 
>>> The model is very simple. I have attached the zone1.geo file.
>>> 
>>> There is no output to the console.
>>> 
>>> My simulation goal is to simulate a greenhouse with thermal mass over a year and this is just the bare bones of it.
>>> 
>>> Thanks,
>>> 
>>> Paul
>>> 
>>> 
>>> On 2018-04-25 12:17 PM, Achim Geissler wrote:
>>>> Dear Paul,
>>>> 
>>>> do you have this problem when running a short simulation which covers said hour, also?
>>>> 
>>>> Do you have controls defined? What changes in said hour which could have control response issues? Is there any output to the console?
>>>> 
>>>> Usually, iterative loops in ESP-r have an upper limit, so it should come to a solution at some point. However, there are exceptions to this, sadly.
>>>> 
>>>> Again, without any information about your model it is difficult to help close in on the issue.
>>>> 
>>>> Best
>>>> Achim
>>>> 
>>>> - by the way, what is your affiliation and what are your simulation goals?
>>>> 
>>>> 
>>>> 
>>>>> On 24 Apr 2018, at 21:01, Paul <paulnee at xplornet.com> wrote:
>>>>> 
>>>>> Firstly thanks for all the help so far.
>>>>> 
>>>>> When I try to do a long simulation bps goes into a loop around 2184
>>>>> hours. It is consuming 100% of the cpu and about 1517884k of ram. The
>>>>> machine has 8gb of ram of which 4gb is free at the time when it loops.
>>>>> 
>>>>> Does bps have size or time limits?
>>>>> 
>>>>> I've tried it with other weather files and it still loops.
>>>>> 
>>>>> Thanks,
>>>>> 
>>>>> Paul
>>>>> 
>>>>> 
>>>>> _______________________________________________
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>>>>> esp-r at lists.strath.ac.uk
>>>>> http://lists.strath.ac.uk/mailman/listinfo/esp-r
>>>> achim.geissler at intergga.ch
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
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>>> <zone1.geo>
>> achim.geissler at intergga.ch
>> 
>> 
>> 
>> 
>> 
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> 

achim.geissler at intergga.ch