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[EnergyPlus_Support] Re: time step in hour= 1 ok?
- To: EnergyPlus_Support@xxxxxxxxxxxxxxx
- Subject: [EnergyPlus_Support] Re: time step in hour= 1 ok?
- From: "astroiid" <astroid8@xxxxxxxxxxxxxx>
- Date: Fri, 20 Mar 2009 12:15:44 -0000
- Delivered-to: mailing list EnergyPlus_Support@xxxxxxxxxxxxxxx
- Delivery-date: Fri, 20 Mar 2009 06:46:38 -0600
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Thanks for the quick answer! The strange results: I use the lighting with stepped control (one step) and it should be switched off when the illuminance at reference point is above 500lux. This means in the results the working hours with daylight illuminance >=500lux should be equal to working hours with lighting switched off. However this is only the case when I use a time step of 1. With time step 4 these hours differ significantly...
I think this might be solved by switching the output to "timestep" instead of "hourly", but I would like to keep the hourly output.
I hope this helps to understand what I mean?!
Astrid
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Linda Lawrie <linda@...> wrote:
>
> What do you mean by "strange results" in your hourly outputs?
>
> In general, the recommendation is still 4 or even 6 for the number of
> timesteps per hour.
>
>
> EnergyPlus Development Team.
> At 02:42 AM 3/20/2009, astroiid wrote:
> >I am running a single zone simulation of an office with airflow
> >network (natural ventilation) and purchased air heating and cooling.
> >Using time step in hour = 4 produced strange results for my hourly
> >output variables. When I change the time step in hour to 1 the
> >results look ok. Am I making a mistake using time step = 1, although
> >the recommendation in the inputoutput reference is 4? I would prefer
> >the hourly output instead of switching the output variables to "timestep"...
>
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