RE: [EnergyPlus_Support] Problem with low heting values from e+

Do you still have the IDF in Version 6.0? I know that the input format has change for many objects in version 7.10. Just curious.

The number I gave you was for one floor. Two floors together would be about 3.0 kw for heating or cooling.

It is not very practical to use a single zone building for solar related study. Monthly report is also not very suitable to find simulation problems.

Dr. Li

To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: ordoumpozanis@xxxxxxxxx
Date: Sun, 29 Jul 2012 14:42:31 -0700
Subject: Re: [EnergyPlus_Support] Problem with low heting values from e+

Dear Dr. Li

Thank you for your answer. I agree with your results but a house as this one in Greece is expected to have mach more heating capacity from the calculated (5-8 kW system).In other buildings simulation (but in version 6 of e+) I had no problems with the results but in this one I cannot accept so low heating capacity as a correct values. I have discussed this problem with some other e+ users in Greece and they had the same problem but could not find the reason.

So I'm looking either an error of mine or something that I could not find at this stage.

From: YuanLu Li <yli006@xxxxxxxxxxx>
To: EnergyPlus_Support <energyplus_support@xxxxxxxxxxxxxxx>
Sent: Sunday, July 29, 2012 10:10 PM
Subject: RE: [EnergyPlus_Support] Problem with low heting values from e+

I did not look at the IDF in detail. The simmulation with the DesignDay objects added was error free.

The summary report showed the floor area as 72 m2. The heating and cooling rates were around 1.5 kw for the Winter and SUmmer design days.. These capacity can be met with a portable unit.

You were using annual simulation, and the result simply means that you may not need HVAC system.

Dr. Li

To: EnergyPlus_Support@xxxxxxxxxxxxxxx
CC: kontante@xxxxxxxxxxx
From: ordoumpozanis@xxxxxxxxx
Date: Sun, 29 Jul 2012 09:16:04 -0700
Subject: [EnergyPlus_Support] Problem with low heting values from e+

Dear E+ users

I am having problem to understand why e+ gives very low heating values to the attached model.

It's a simple 2floor domestic house with an ideal system and some classic internal load (people, lights, equipment) and an infiltration.

The results give a value of 0.07 kWh/m2 witch is not realistic. I have checked the internal load, I have changed a climate files but still cannot get realistic values.

The only thing that I can imagine is the thermal mass but I have checked the material properties as well could you suggest any other parameter that I might have not check, or if you had a similar problem to propose me a solution

Thank you in regards

K.O.

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