RE: [EnergyPlus_Support] Heating/Cooling Load

I want to congratulate Dr.-Ing. C. Felsman on very good grasp of English and interesting energy questions. One note: Past tense of put is also put. English is strange some times.

Najad Tuffaha, PE, CEM

PEPCO ENERGY SERVICES

Office 703 253-1774

Mobile 202 309-0553

Fax 703 253-1799

-----Original Message-----
From: Clemens Felsmann [mailto:felsmann@xxxxxxxxxxxxxxxxx]
Sent: Friday, November 01, 2002 7:36 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] Heating/Cooling Load

Michael,

thank you for the examples. It was really helpful. Now I know that it is necessary to create a minimum of zone equipment (inlet, air, return node) to be able to calculate loads. Otherwise the predicted load value is nonsens.

But there are further questions: If I change your example file in a way that there is a low dynamic building construction (for instance 5cm/insulation + 25cm/concrete instead of 5cm/concrete only) then the heating load profile becomes inconstant. It seems to me that there have to be some transient processes are going on. (You can see it in the file I putted into the file area)

What are the reasons for this effect? How can I reach a real steady state at a design day?

Thank you in advance!

Clemens

Dr.-Ing. Clemens Felsmann
Institut für Thermodynamik und TGA der TU Dresden
Tel.: 0351/463 3 5177
Fax: 0351/463 3 7888
mail: felsmann@xxxxxxxxxxxxxxxxx

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