Re: [EnergyPlus_Support] Re: Ground temperature of Singapore

Tough problem. Is it perhaps not better to traverse the gas lines in the attic/ceiling space, if the attic/ceiling space is already vented? Then you could shut the floor vents to the outside and vent the floor to the inside. As long as cold winter morning air is allowed to stroke the bottom of the floor, it will remain cold in the morning. Does a layer of insulation not work according to simulation results?

Cheap insulation?

I have seen an interesting construction where recycled empty glass bottles of the same height are stood and packed closely together to provide an insulation between earth and wooden floor.

Sent from my iPhone

On 22.01.2013, at 23:14, "Ooi" <ooi_kb3@xxxxxxxxxxx> wrote:

The wooden floor of my 54 year old house is 450mm above ground level.
This 450mm Crawlspace has the gas pipes, water pipes, heated air duct
It is vented to the outdoor air for the safety of men who have to renew the pipes. Jean's suggestion to vent to the indoors not acceptable to the workmen.
i model it as a Crawlspace zone. The floor (earth material) of the Crawlspace is Ground. Undisturbed Ground Temperatures are used.

The floor of the existing house is too cold, especially in winter months. As in most houses in Australia nowadays, the carpet has been removed, and the wood polished. Difficult to put insulation under it.

To save energy for indoor comfort of the proposed extension, i am happy with the results of floor in contact with the ground. Hydronic floors are too expensive :). Still open for ideaas, i am not in a hurry to build the extension :).
ooi

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Linda Lawrie wrote:
>
> At 09:00 AM 1/22/2013, YuanLu Li wrote:
> >Dr.Ooi's nanny house extension is 440mm above ground. How do you
> >model this space? and how to maximize this for location Melbourne, Australia?
>
> I would probably model this as a floor exposed to the outdoor
> environment but without sun. Not sure about wind exposure.
>
>
> >Natural ventilation is a different class of research. To the
> >American people, this is going back to the stone age.
>
> I hope this is not true (Americans and stone age). One of the early
> studies using EnergyPlus was a building in San Francisco (or
> somewhere in CA) that used natural ventilation -- this was a
> commercial building, not a residence.
>

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