Best air cooling system

[brillito]

For an apartment building (9 apartments total) in a tropical city, what will be the best air cooling system that does not increases the heat, vibration and noise to the building itself and to the neighbors. the machines will be set at the roof.

 

[pipehead]

Gas air conditioner. Google it for details

 

[IRstuff]

Your question can only be answered by opening the existing windows on the building. Any system will increase heat, vibration, or noise to some degree.

TTFN

Eng-Tips Policies FAQ731-376

 

[kenvlach]

No mechanical parts necessary.
Put a Peltier module near the ceiling of each floor & connect each to a heat pipe extending to the roof. The rooftop end should be 'high albedo' (high solar reflectivity, high IR emissivity). A thin film of silica glass or Teflon over either bright-dipped aluminum or silver-plating (over either copper or aluminum) will give the best results. Clear anodized (8-10 microns) bright aluminum is also good.
See Thermal Control Systems for spacecraft, e.g.,

http://www.astrobooks.com/files/SMAD3Err4th.pdf

http://www.tsgc.utexas.edu/archive/subsystems/thermal.pdf

 

[brillito]

I can not use gas air system because here we don’t have a natural gas supplier. My research led me to three options, chillers (mini chillers), the variable refrigerant volume system or cooling towers. Still looking to understand the difference.

 

[pipehead]

Cooling towers in a tropical city will just make the rooms more tropical.

Variable Volume Refrigerant is an electric or gas chiller where the refrigerant is allowed to flow to different rooms from a central location. Mini chillers appear to be where brine water or water/glycol solutions are cooled by a central chiller that again uses electricty or gas (even proprane gas).
So, in any case you will have a central chilling unit with eith the refrigerant going to the rooms or a heat transfer fluid. Given the choice, I'd go with the cetral chiller and the heat transfer fluid (minichiller). The piping to and from each room will be a nonhazardous material (use propylene glcol). You could even use the heat transfer fluid to a walk in cooler for food and beverges. The self contained chiller unit can be made very quite with insulation and proper ducting of air around it.