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Re: GSBN:Re: strawbale buildings in tropic climate



Hi,

assuming there are also cold nights in Panama, we might also consider a
small heat pump (wall/floorheating), suitable for cooling.

Greetings from The Hague,

Martin Oehlmann



----- Original Message -----
From: "Rene Dalmeijer" rene.dalmeijer@...
To: "GSBN" GSBN@...
Sent: Thursday, August 26, 2004 10:04 AM
Subject: Re: GSBN:Re: strawbale buildings in tropic climate


> Regarding the above discussion I would like to comment on the following
remark.
>
> At 08:16 PM 8/26/04, you wrote:
> >>Passive cooling should not be compromised by using high insulation
> >>SB walls.
>
> I think it is a misconception to only think that insulation works for
> heating I am sure the writer of the remark which I have lost track of does
> not mean it the way it now comes over.
>
> Insulation is just as important for cooling maybe even more so when
cooling
> is required. If you want to go passive which I think you should strive to
> do so in as many cases as possible it is still a good idea to use a
> combination of mass and insulation. I do agree that the Panamese climate
> zone is most probably one of the most difficult due to the almost constant
> hot ambient night and day air temperatures. Although that said night
> temperatures will always be lower the daytime. Besides there is a marked
> difference between surfaces in direct sunlight and those in the shade,
> insulation will help preventing this heat making its way in.
>
> I am not sure what the specific local climate circumstances are. A low
mass
> little insulation well ventilated strategy will be the most appropriate if
> regular wind is available specifically in the evening. The low mass little
> insulation approach uses the least amount of resources and is the simplest
> to implement. If there is little wind and relatively larger night daytime
> ambient air temperature swings then the insulated mass approach works
best.
> To enable extra cooling wind towers and swamp coolers will increase
> comfort. Specifically in the case of these relatively feeble 'cooling'
> mechanisms the insulated mass approach will maximize their effect.
>
> The above 2 approaches off course are born out by long existing
traditional
> practice all over the world. Again it all depends on local circumstances
> including site location, available building materials and climate. The
best
> test case is to find out what is local best practice this will in most
> cases be the best indicator.
>
>
>
> Rene
>

>
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