Best air cooling system
Best air cooling system
(OP)
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.





RE: Best air cooling system
RE: Best air cooling system
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Eng-Tips Policies FAQ731-376
RE: Best air cooling system
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
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RE: Best air cooling system
RE: Best air cooling system
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.