How to Make a Dehumidifier Using Thermoelectric Cooling - RCLifeOn

In today's video I'm going to show you how to build an effective dehumidifier to decrease the humidity in the air. Here's all the parts needed:

-Scrap material, such as foam.

All these parts can be found on Ebay for under 30$! You will also need some tools:

-Hot glue
-Solder station
-Knife
-Pliers
-Screwdriver + screws

Becuase of the limited number of parts it goes together quite easily. Begin with attaching the fan to the larger heat sink using screws. A computer fan will have a red, black and yellow wire, cut of the yellow using a plier.

Your next step is to place the peltier chip between the large and small heat sink. Use the heat sink compound on both sides of the peltier chip and sandwich the device between the two. In order to keep the peltier under constant pressure (this is to ensure it keeps good contact witht he two surfaces) use screws to connect the two heat sinks. This will also reassure that the peltier stays in the same place.

Take your scrap piece of foam and cut long enough legs for it to lift from the ground. You may want to use wood instead of foam to increase durability.

At this point you will have two wires from the fan, and two wires from the peltier chip. It's now time to test if our dehumidifier works. Check the rotation of the fan, the air should be pushed downwards.

Music:
The Time Is Now - HookSounds
Phantom Sage - Illusions

Used cameras:
Sony Alpha a55

Video Editing Programs:
LightWorks

[IIGBII]

This is a great project. Just for future reference, the Pelter has a lot of little metal blocks of PNP & NPN material in a checked pattern that has gaps between the blocks. They are joined in series with copper tracks and attached to the two ceramic plates on each side. The hot ceramic plate side needs to be completely covered by the heat sink or a heat spreader (with added Thermal transfer compound), then attached to the heat sink, so no ceramic area is uncovered, or you will burn out the Pelter as the exposed blocks overheat and the whole (Thermal electric Cooler(TEC) will stop working.

[joshhagen]

Heck yeah! Just what I needed to see I need to build a dehumidifier to keep my filaments dry! Thanks again!

[vihaanravishankar]

looks really good, could you provide some details on how much water it removes in a hour and how much space its ideal for, and total power consumption

[Stasvideo]

Nice device, but you should not connect hot and cold radiators with steel screws. Heat will goes through it and efficiency will decrease. It is a common mistake:)

[alexshepler]

Pro tip, if you have an old desktop computer (A laptop might work too) that you don't ever use and you are alright taking apart you can take the heat sync for the hotend off of the old cpu and if you have that really cheap gpu you can use that as the other or any small heat sync for the cold end

[johnSmith-myyj]

Your fan is blowing the air in the wrong direction, from the hot side to the cold side, making it very inefficient. You want the air to first pass the cool side, where the temperature drop will condense the water, and then the hot side, where the cooled air helps lowering the temperature, increasing efficiency. For maximum efficiency you'd want all the air passing both heatsinks (with perhaps extra ambient air passing only the hot heatsink). With the air blowing from hot to cold side, that would result in no condensation at all, because the air would be heated for example from 20°C to 60°C and then cooled to 40°C. With the air blowing in the other direction, it would first be cooled from 20°C to 0°C, causing condensation, then heated to 40°C at the hot side.

[landonferguson]

you can add a drip pan for long term use and just empty it out every once in a while.

[rachmadtantojono]

i want to make a refrigerator using peltier, do you have an idea how to design the case so it have a compartment to collect all the condensation inside ? as you know damp stryrofoam Will smell bad overtime

[zazazazizizi]

Hello !! What could you suggest me to recover humidity from a little greenhouse in condition of 35 to 45 degree (celsius) and a humidity (hygrometry) about 95 to 99 % ? Thank you for your answer !!

[blueckaym]

Nice idea, but aren't Peltier units rather inefficient?
I guess a better option would be a heat-pump?

[nmgani]

Thanks for the vedio ...
can you Advise to make large dehumidifier for the agricultural. because day by day in our village farmers are facing Water shortage due low it is simple concept we can also to teach them to grow agricultural....
#share the knowledge#
Solar power+dehumidifier= water

[albertrt]

Hey man, this can also work as a water collector from the atmosphere.

[atalakeanumonarshi]

What an cool project ! You could improve it as well if you want to.

[sureshajmeera]

Awesome video Simon you please tell me clearly what were the three things you have attached after 'SWITCH' . And what was the green light at the last...

[lupitchr]

Very cool vid! Dig the music too. Nicely done :)

[ninjazzo]

I thing the result would be better if the air pass before the cold side of heatsink, and after on hot one. Your Fan push the air on the hot side and after on the cold side.
The air lose Humidity when it's temperature decrease, beause it's capacity to tolerate humidity depends on the temperature. Higher is the temperature, more humidity the air can tolerate.
If you warm up the air, and next you cool it(bringin it to almost the same starting temperature), you make it capable to tollerate more humidity and next to tollerate the same humidity that it tollerated at the start of the process.
Instead if you cool the air and next worm up it, when the temperature goes under the Environment temperature, it lose a lot of humidity, next when it warm up, it has the same temperature of Environment but a lot less of Humidity

[wariebimologe]

good work. People please can i adapt this to extract and condense water water out of food in a closed airtight container?

[ToonX]

you can make 10 of them use them as one unit and that will be a great dehumidifier .

[PakiNewsNetwork]

Lowers humidity while raising room temperature. Any possible way to make an AC with many peltier chips (that takes hot air out of the room?

[MyIronman]

It's not pulling water from the air it's get cold it's just like a mini refrigerator . When you have them running it gets water vapor inside. Getting cold makes condensation that does not pull condensation out of the air