How a Dehumidifier Works
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- Опубликовано: 4 окт 2024
- A dehumidifier is basically a very simple machine. Understanding how it works can help you diagnose problems. For more home maintenance and repair how-tos, projects, home improvement help, technology tips, holiday ideas, garden tips, recipes and more, visit the doityourselfstan RUclips channel @doityourselfstan or www.homefrontstan.com.
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This was a far better explanation than all the new videos...thanks!
I finally understand. Great explanation Stan. Thanx for the info.
I just got one, started wondering how it worked. Your video explained it perfectly.
Thank you. :)
-John
This is also one of the reasons we refer to it as an Air "Conditioner" and not a cooler. Basically, it has all the parts an AC system has...it follows the basic refrigeration cycle; Pump, condense, meter, evaporate. Moist air hits the cooler coil and condenses...this is why your AC system looks like its "leaking water" on humid days. This water you see is actually the water in the air from your house. Technically speaking, a well laid out and properly sized AC unit can dehumidify a home quite adequately.
Thank you.
thanks for the video. great info
Thank you so much!
That is a good question. The difference is.. The evaporator and the condenser are in line. The difference in the air temperature causes condensation and thus removes water from the air flowing through the machine. I can get more technical but that is the basic reply I think you are looking for. YOU can build one from an old window unit. IT has been done~!
OK. 1) if you look at the machine in the video there are TWO sets of coils - the first, as explained, cools the air and causes moisture to condense. However the heat from that first operation is fed through the second coil, and heats the now drier air as it passes through. This relies on the principle that as water condenses, it gives off heat - the latent heat of condensation. It's the opposite of boiling a kettle in which water absorbs energy to boil - the latent heat of vaporization. 2) The warmth of the machinery causes heating. I have an ordinary household dehumidifier and measured 7 degrees Celsius between air in and air out. Dry air heats much more rapidly than wet air, so the air that comes out is at a higher temperature than when it went in. Not only is your dehumidifier good at removing water, it ALSO heats your home.
Very well explained. Question; is the air that comes out of the unit, cooler than ambient? Thanks, Cheers
The air that comes out of a dehumidifier is warmer than the room air.
Thanks for the response. I wasn't sure if the heat from the compressor and electric fan, or the cooling from the coils would be the dominant factor. I should have guessed heat. They're similar to window A/C units. Cheers
stanfordcoffee Actually, as I understood, some dehumidifiers have a heating coil to reheat the air back to a normal (or warmer) temperature. (There are different types of dehumidifying) Because, as I understood, your right. Its is passing hot air over cold coils which will inevitably cool that hot air to some extent. Now,in this method of dehumidifying, the refrigerant still needs to be cooled, so an extra heat coil is probably not used ... but.. I'm not sure why they don't put a by-pass option in for that. In the warmer months I would not want it to reheat the air, and that costs more money. Oh wait, I got it. If they put that by-pass option in there, then it would be a portable AC unit... almost. (you would still need to exhaust the heat from the refrigerant, to the outside. Then you could atomize the waste water into the exhaust air, and run it continuously.)
+Chad Gambrell this is my pain every night in summer. it's pumping out really warm air, into my already sweltering room in Australian costal heat and humidity :(
That´s my problema too Emma Cormick. My fantastically working dehumidifier gets rid of all the mold and keeps my place dry, while it keeps me wet with sweat. I can hardly cook, since the machine is in my kitchen where I need it most, because I have to stop every so often to wipe away the massive perspiration.
so this has the same princapals as an AC but an ac is vented out the window and way more powerfull so im i got an ac and i got a drain in the celler im gonna give it a try, looking for a way to dry the firewood in my cellar faster and lower the humidity feel free to correct me for being incorrect. info is powerful
Cool
question. how hard would it be to build one of these at home using ordinary hardware store parts?
Am i to understand as per Vernon Allen's comment (which i cant reply too????)
that because the evaporator coil and condensing coil are in line it cools the air which cause water to be removed then reheats the air on exit?
how does this different from a AC unit?
I thought when you compressed air it got hotter, not coldeR?
so I was wondering how a non electric dehumidifier works
How dehumidifier works
the evaporator is inside and the condenser is OUTSIDE not directly infront of the evaporator if that was so you would have zero cooling and just dehumidification
Are you joking? A AC unit is used to cool down a room, a dehumidifier is used to take moisture out of a room. Totally different.
Poorly made video. You did not explain the second part which is the condensation coil where cold&dried air is fed to bring the latent heat of compression back out with the passing air. The machine is essentially and AC unitnthat does not.alters the room.temperature.Regular air.conditioning is also a humidifier---a much more effective one---but they lower the room temperature in the process.