The argument is the same. Your floor is helping to cool the building by the ground temperature. Therefore, by insulating the floor to ground, the cooling bill goes up and the heating bill comes down.
One of my students will be looking at the use of basement in a tropical country for energy saving.
My hunch is that the saving will be small, because the temperature difference for cooling from ground is small. Heat conduction through the basement wall is too slow.
Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: vs114@xxxxxxxxx
Date: Fri, 3 Jul 2009 08:27:39 -0700
Subject: Re: [EnergyPlus_Support] Add a basement?
In the beggining there was no basement.
The climate is warm, so both heat and cool have almost the same importance.
Without any insulation for the floor and having 20cm isulation for the rest dwelling, i get 1500 kwh/year for heat
and 650 kwh/year for cooling.
With 10cm insulation at the floor (on the ground) and everything else the same, i get 150 kwh for heat and 3700 for cooling.
I' ve tried the ground temperature and the outside boundary condition set to surface but i get almost the same results.
Any idea?
If i add a basement, will this help the enormous cooling needs?
Thank you all.
Vaggelis.
From: YuanLu 元六 Li <yli006@hotmail.com>
To: Linda <energyplus_support@yahoogroups.com>
Sent: Friday, July 3, 2009 12:56:31 AM
Subject: RE: [EnergyPlus_Support] Add a basement
To: EnergyPlus_Support@ yahoogroups. com
From: vs114@yahoo. com
Date: Thu, 2 Jul 2009 10:30:43 -0700
Subject: Re: [EnergyPlus_ Support] Add a basement
From: Linda Lawrie <linda@fortlawrie. com>
To: EnergyPlus_Support@ yahoogroups. com
Sent: Thursday, July 2, 2009 8:18:24 PM
Subject: Re: [EnergyPlus_ Support] Add a basement
Internet Explorer 8 makes surfing easier. Get it now!
From: YuanLu 元六 Li <yli006@hotmail.
To: Linda <energyplus_support@
Sent: Friday, July 3, 2009 12:56:31 AM
Subject: RE: [EnergyPlus_
I wonder where you added the floor insulation.
The basement is being heated by the ground below.
If you insulated the basement floor, you have lost the ground heating.
If you have a walk out basement, make sure to insurate the exposed basement wall to R12 or more. Ground temperature is generally warmer than the outdoor exposed temperature. Ice is a good insulator at the groun durface.
Normal basement wall in Canada is insulated. at least, to one meter below the ground level, to R8 or more. Water mains are buried two meters below ground, and will not freeze in Winter, even when the outdoor temperature is at -18 degree C.
Dr. Li
To: EnergyPlus_Support@ yahoogroups. com
From: vs114@yahoo. com
Date: Thu, 2 Jul 2009 10:30:43 -0700
Subject: Re: [EnergyPlus_ Support] Add a basement
The problem i had and drive me to the solution of "basement"
was that when the floor had NO insulation, i needed 500Kwh for heating.
When i added 3mm insulation, i needed 2500Kwh for heating.
Is this logical?
(warm climate)
was that when the floor had NO insulation, i needed 500Kwh for heating.
When i added 3mm insulation, i needed 2500Kwh for heating.
Is this logical?
(warm climate)
From: Linda Lawrie <linda@fortlawrie. com>
To: EnergyPlus_Support@ yahoogroups. com
Sent: Thursday, July 2, 2009 8:18:24 PM
Subject: Re: [EnergyPlus_ Support] Add a basement
A "walk out basement" might be below grade on one or more walls. There will be a warning message that it can't do the height specific calculations it uses on surfaces/walls. The warning can be ignored.
At 11:09 AM 7/2/2009, v s wrote:
At 11:09 AM 7/2/2009, v s wrote:
My outside boundary conditions for the basement is ground.
What is the "warning messages on a walk out basement"?
Will i have any other problems?
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Internet Explorer 8 makes surfing easier. Get it now!
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