Re: Heating a City

On 9 apr, 22:13, phoe...@[EMAIL PROTECTED]
 (Damien Sullivan) wrote:
> Luke Campbell <lwc...@[EMAIL PROTECTED]
> wrote:
> >There are some practical issues that come to mind.  If the city wants
> >to raise the temperature, presumably this is because it is cold.  Cold
> >often is associated with snow in the winter.  Heavy snow loads can
> >cave in roofs.  The usual method of getting around this - sloping the
> >roof - is impractical on the scale of a city.

If the goal is to allow people to go "outside", you might allow
internal courtyards surrounded by roofs at all sides.

You will need to make
> >the roof strong enough to withstand the extra load of overlying snow,
> >which will require more than your usual greenhouse roof.
>
> One page I saw yesterday suggested heating wires in the roof, to be used
> to melt off the snow.
>
> >There is also issues of how you deal with rainfall - the city will
> >intercept a fair amount of water, where does it all go?  Of course,
>
> Yeah, the runoff chains will have to be robust, since a lot of water
> will be funnelled to them.
>
But street pavements intercept the rainfall and snowmelt anyway. And
receive all the water intercepted by roofs as well.