View Single Post
Unread 01-13-2004, 08:41 PM   #46
TerraMex
Cooling Savant
 
TerraMex's Avatar
 
Join Date: Nov 2002
Location: Portugal, Europe
Posts: 870
Default

Quote:
including using his own temperature figures taken from his earlier posts
Well, he stated clearly that an achievable scenario for the ground radiador would be 8 ºC (see previous posts). Also that he will be using peltiers. Now depends on the peltiers , but 12º isn't that far off for a heavy pelted WC given his ground radiator. And if the (auto) radiator comes before or after the cooling loop (preferably before to maximize the dehumidifier effect). Lots of If's like i've said before.


Quote:
but still have a very high RH because it was cold
No, it will have the exact same RH of the heated air IF no condensation/evaporation occurs in the heating element and/or exaust of the Dehumidifier. It has already removed an amout of water from the air, the heater doesn't remove any more (not even it's job). Water vapour doesnt "disappear" with temperature shifts. It has to condensate , or water has to evaporate to change de current RH. Thus de Dehumidifier purpose. If the heating element is shut down, the air will exit cold, but with the same RH, but different dew point.

Same temperature can have a wide range of RH, and vice versa. What acts up on them is the enviorment.

( I'm getting the feeling you're reading the chart wrong, and getting a good deal of ideas from that. You need the RH % AND the temperature of the air in order to read the dew point chart. One without the other doesnt make sense. For all the stated reasons. At a given air temperature, at a given RH % , if the air is in contact with a surface (solid , liquid or gas) with lower temperature, condensation will form. )

Quote:
What I am proposing in effect is to put the computer box at the output end of a fanless dehumidifier. What you and BR are proposing is to put the computer box between the condensor and the rewarmer
Exactly.
But i already understood that. But again, the difference is the dew point. How cold are the blocks and tubes ? Dunno. One of key issues.
The difference is that BR's rewarmer has no comparison to a rewarmer from the dehumidifier. It's only purpose is to enforce convection currents which won't happen normaly given the cold air at the base. If the cold air isn't forced up (through the case) the system won't work (in BR's idea). Maintain cool air, as blocks and tubes are cool, passing through the case.
__________________
"we need more cowbell."
TerraMex is offline   Reply With Quote