I think EPlus may assume its temperature the same as the zone mean temperature. If the zone temperature is kept constant, the charge and discharge effect would be low.
The zone temperature would be slowly changing at the garage side. The garage is usually vented to the OD air and it receive the exhaust air from the building in Winter. Temperature variation would be low as well.
You may try modelling a one zone building with PurchasedAir to change the indoor temperature. Try different algorithm as well. If necessary insulate the sides of the thick slab from the ground, or exterior..
Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: jeannieboef@xxxxxxxxx
Date: Thu, 8 Dec 2011 07:53:59 +0000
Subject: [EnergyPlus_Support] Re: Easy question - Very thick massive external floor
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Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx
The primary EnergyPlus web site is found at:
http://www.energyplus.gov
The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/
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EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
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The zone temperature would be slowly changing at the garage side. The garage is usually vented to the OD air and it receive the exhaust air from the building in Winter. Temperature variation would be low as well.
You may try modelling a one zone building with PurchasedAir to change the indoor temperature. Try different algorithm as well. If necessary insulate the sides of the thick slab from the ground, or exterior..
Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: jeannieboef@xxxxxxxxx
Date: Thu, 8 Dec 2011 07:53:59 +0000
Subject: [EnergyPlus_Support] Re: Easy question - Very thick massive external floor
Dear Dr. Li, I considered this option. The problem with that solution is that I would loose the source/sink aspect of the high thermal capacitance of such a thick construction.
Because of the low transfer ability of the construction, it would take a long time to "charge" but just as long a time to "discharge" energy both to the internal zone and to the outdoor environment.
So thinking about it more, declaring it adianatic is the perfect solution. I just have to quantify how much energy transfer we will be neglecting, to defend that decision.
Thanks everyone for the discussion. It helps to talk about it.
Because of the low transfer ability of the construction, it would take a long time to "charge" but just as long a time to "discharge" energy both to the internal zone and to the outdoor environment.
So thinking about it more, declaring it adianatic is the perfect solution. I just have to quantify how much energy transfer we will be neglecting, to defend that decision.
Thanks everyone for the discussion. It helps to talk about it.
__._,_.___
Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx
The primary EnergyPlus web site is found at:
http://www.energyplus.gov
The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/
Attachments are currently allowed but be mindful that not everyone has a high speed connection. Limit attachments to small files.
EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
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