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[EnergyPlus_Support] Re: Problem with results of a simulation
Thanks in advance Dr.Li,
It is a simple simulation without HVAC systems,I have only added the Ideal Load System.
But I have a very high peak load in heating mode when the the target temperature for my ideal system changes from 12.8ºC to 21.1ºC at 6:00am.
It seems that my Ideal Load System is switched off because the zone temperature is near to 18ºC (the target temperature is 12.8ºC,therefore the Ideal System is off).But at 6:00am the target temperature changes to 21.1ºC,the Ideal System switchs on.This is the moment when I got a very high peak(For example,I had a peak of 80000W at 6:00am and after this peak the load is maintained near to 8000W during only one hour more,after that I dont need more heating).
The flow rate which is autosized is very high,I've tried to manual size it to 2 m3/s but it didn't work.
I will send you my idf,if you can take a look it would be great.
Thanks,
Ignacio Gomis
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, YuanLu Li <yli006@...> wrote:
>
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> I am not sure what is your "air heating rate". As your heating load is high during the day, from 6 am, may be you are reporting some roof temperature related variables. A 750m2 roof can be receiving 750kW of heat from the sun. (Assuming 1KW/m2.) The variation of this intensity can be found by listing the solar radiation related variables in your simulation. If you will post or send me the IDF, I will have a look at it. Dr. Li
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> From: nachogo27@...
> Date: Thu, 10 Nov 2011 14:34:28 +0000
> Subject: [EnergyPlus_Support] Problem with results of a simulation
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> Hi,
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> I'm having some strange results from a simulation in Energy+.
>
> The building is composed by 2 zones,each one of 50X15(m)and a height of 5 meters.
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> //////////////////
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> / / /
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> / / /
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> / 750m2 / 750m2 /
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> / / /
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> / / /
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> //////////////////
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> The results of "Ideal Loads Air Heating Rate" are very high,the peak is almost 750000W for each zone.The peak value occurs at 6:00am when the thermostat change the temperature target.(Almost all the days I have this peak).
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> The results of "Ideal Loads Air Cooling Rate" are normal, the peak is near 25000W for each zone.
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> I can send the files if someone needs it to help me.
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> Thanks
>
> P.S.:The simulation is for Malaga(Spain)
>
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