[Equest-users] ETTV Value

[Ery Djunaedy]

  Zahid,

First of all, Singapore's building authority may or may not accept the 
ETTV calculation based on eQuest simulation. You can always try to make 
the case. Arup has made this case at least once that I know of.

To do it in eQuest is quite simple. You simply need to disaggregate the 
heat flow through the facade into (1) wall conduction (2) glass 
conduction and (3) solar radiation. I think these values are reported in 
the standard report (LS-C).

An example can be found here:

Clarice Fong, Wu Xuchao, Ery Djunaedy, "Formulating an Alternative 
Methodology for Singapore's Envelope Thermal Transfer Value Calculation: 
Accounting for Non-Conventional Shading Strategies", PLEA 2009.
http://www.plea2009.arc.ulaval.ca/Papers/2.STRATEGIES/2.2%20Heating%20and%20Cooling/ORAL/2-2-11-PLEA2009Quebec.pdf

Local resource in Singapore, you can ask Clarice or Xuchao, or you can 
always try Prof Chou of NUS.

Hope this helps,

Ery




On 01/15/2011 05:05 AM, m zahid wrote:
> Hi
>
>
>  how can i calculate the ETTV (Envelop Thermal Transfer value ) value 
> from eQUEST
>
> thanks
>
> zahid
>


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20110115/f6e117a7/attachment-0002.htm>