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HVAC Discussions - Heating, ventilation and air conditioning.
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Posted by Lewis on May 8, 2008, 12:05 pm
Hello,
I am currently engaged on a project where I have to air condition a
skyway which links a passenger terminal to ships which dock about
160metres away from the terminal. The skyway is made out of steel and
glass. A very large amount of glass is being used primarily for
architectural reasons. I don't have much issues working out heat loads
as it is fairly straightforward. The heat load is really high, as you
can imagine and of course the type of glass...the u-factor etc will
determine the size of the air conditioning unit I choose. My problem
is that I am not sure what sort of unit to choose for such an
application and how to distribute air within this area. If anybody has
experience with air conditioning such structures and can pass on some
advice, that would help.
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Posted by on May 8, 2008, 12:18 pm
wrote:
>Hello,
>I am currently engaged on a project where I have to air condition a
>skyway which links a passenger terminal to ships which dock about
>160metres away from the terminal. The skyway is made out of steel and
>glass. A very large amount of glass is being used primarily for
>architectural reasons. I don't have much issues working out heat loads
>as it is fairly straightforward. The heat load is really high, as you
>can imagine and of course the type of glass...the u-factor etc will
>determine the size of the air conditioning unit I choose. My problem
>is that I am not sure what sort of unit to choose for such an
>application and how to distribute air within this area. If anybody has
>experience with air conditioning such structures and can pass on some
>advice, that would help.
Consider sock-ducts.
http://www.ductsox.com/
http://www.google.com/search?hl=en&q=sock+ducts
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Posted by Telstra on May 8, 2008, 10:47 pm
Induction could be one approach. This could consist
of a small diameter High - Velocity primary underfloor
Supply air duct carrying conditioned air to sets of
nozzles along it's length. The High velocity primary air
leaving the nozzles inducing a flow of and mixing with
return air. The mixed air would then enter a conditioned
space 6 to 8 feet above the floor. Static convection and
stratification would then cause the air above this level to
rise and leave through ceiling vents.
However a more logical approach would be to use bus
or Coach type Roof mounted air conditioning units
spaced at appropriate distances along the roof. Carrier,
Mitsubishi or Thermoking can supply these.
> Hello,
> I am currently engaged on a project where I have to air condition a
> skyway which links a passenger terminal to ships which dock about
> 160metres away from the terminal. The skyway is made out of steel and
> glass. A very large amount of glass is being used primarily for
> architectural reasons. I don't have much issues working out heat loads
> as it is fairly straightforward. The heat load is really high, as you
> can imagine and of course the type of glass...the u-factor etc will
> determine the size of the air conditioning unit I choose. My problem
> is that I am not sure what sort of unit to choose for such an
> application and how to distribute air within this area. If anybody has
> experience with air conditioning such structures and can pass on some
> advice, that would help.
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Posted by Lewis on May 13, 2008, 3:52 pm
Thanks for the information. I am leaning towards the duct socks
suggestion. The roof mounted units will be considered as well.
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>I am currently engaged on a project where I have to air condition a
>skyway which links a passenger terminal to ships which dock about
>160metres away from the terminal. The skyway is made out of steel and
>glass. A very large amount of glass is being used primarily for
>architectural reasons. I don't have much issues working out heat loads
>as it is fairly straightforward. The heat load is really high, as you
>can imagine and of course the type of glass...the u-factor etc will
>determine the size of the air conditioning unit I choose. My problem
>is that I am not sure what sort of unit to choose for such an
>application and how to distribute air within this area. If anybody has
>experience with air conditioning such structures and can pass on some
>advice, that would help.