[BLDG-SIM] Reduction in Energy consumption?

[Vikram Sami]

An interesting (or possibly pointless) anecdote:

When I was at ENSAR, we were doing a glazing analysis for a project in Hawaii looking at different glass properties, U-value being one of them. I turn out that not only is there a diminishing return with increased insulation, there are times when you actually lose performance with an increase in insulation. The reduced insulation increased the building balance point enough to allow the outside air temperature to cool the building. Of course - this was in Hawaii, where more than 90% of the year you are within the ASHRAE comfort zone sitting under a tree. 



Vikram Sami, LEED AP
Direct Phone 404-253-1466 | Direct Fax 404-253-1366

LORD, AECK & SARGENT ARCHITECTURE
Responsive Design · Technological Expertise · Exceptional Service
www.lordaecksargent.com 



-----Original Message-----
From: BLDG-SIM at gard.com on behalf of Gunes Inan
Sent: Mon 2/26/2007 09:56
To: BLDG-SIM at gard.com
Subject: [BLDG-SIM] Reduction in Energy consumption?
 
Hi Micha,

As Vikram said, it depends. To give an example, we measured the heating consumption of two identical buildings (one bare, the other insulated with 8 cm thick EPS boards) for 6 months in Northeastern Turkey, where the annual mean temperature is about 6 Celsius. The average reduction in heating energy was 54 %. Depending on the U-value of the bare wall, this may practically change between 30 and 65 %.

If your building is located at a relatively warm region, increasing the thickness of the insulation will not have much effect on results. Also, ventilation frequency should be realistic.
   
Gunes Inan 

R&D Engineer 
Betek Paint and Chemical Corp., Inc. 
Istanbul, Turkey 
Tel: +90.216.396.2070 / Ext: 177 
Fax: +90.216.396.6989

-----Özgün Ileti-----
Kimden: BLDG-SIM at gard.com [mailto:BLDG-SIM at gard.com] Yerine Vikram Sami
Tarih: 26 Subat 2007 Pazartesi 15:36
Kime: BLDG-SIM at gard.com
Konu: [BLDG-SIM] Reduction in Energy consumption?

The best answer to this would be "It depends".

There are multiple factors that would affect it (skin dominant v/s core dominant), climate, and possibly even usage.



Vikram Sami, LEED AP
Direct Phone 404-253-1466 | Direct Fax 404-253-1366

LORD, AECK & SARGENT ARCHITECTURE
Responsive Design · Technological Expertise · Exceptional Service
www.lordaecksargent.com 



-----Original Message-----
From: BLDG-SIM at gard.com on behalf of micha radi
Sent: Sun 2/25/2007 17:02
To: BLDG-SIM at gard.com
Subject: [BLDG-SIM] Reduction in Energy consumption?
 
Hello there,

What would the reduction roughly be in energy consumption for using thermal 
insulation? I am trying to figure out whether or not my results are 
correct.. Could anyone give me an estimated percentage of such reduction?

My results show very small impact and I am not able to find where my errors 
might lie.

Many Thanks,

Micha

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