Silica Gel + Tupperware as dry box?

[Artosoft]

I am exposed to proven human carcinogens almost every day. It's called Char Kway Teow and french fries, and 2nd-hand smoke.

You can opt to avoid contact with that things.

Regards,
Arto.

 

[cjtune]

I hope you know what is peltier element is. That's make easier to me to explain.

Peltier element have a cold and hot side when direct current (DC) run across it. The cold side is inside dry cab. It will condense humidity inside dry cab into water. The water will going down and there is a sponge that act as a water transfer, but will block the air transfer (so the dry cab is isolated to outside air). This water will go outside dry cab and heated by hot side of peltier element, evaporate to environment. Clever idea I always said.

That's how the humidity inside dry cab is move to outside, not by silica gel or zeolite.

Regards,
Arto.

Hmmm quite plausible.
But what if the specific humidity of the air inside the dry cabinet is not enough to have a saturation temperature that matches the temperature of the cooler side of the peltier?
Wouldn't also the constantly-wet sponge be a fungal growth zone too?

 

[cjtune]

You can opt to avoid contact with that things.

Regards,
Arto.

Hehe. Of course. Do you too?

 

[Artosoft]

Hmmm quite plausible.
But what if the specific humidity of the air inside the dry cabinet is not enough to have a saturation temperature that matches the temperature of the cooler side of the peltier?
Wouldn't also the constantly-wet sponge be a fungal growth zone too?

What do you mean by that?

If the humidity inside dry cab is not enough to condensate into water, that mean inside the dry cab is low humidity already.

If you said temperature inside dry cab is below the cold side of peltier temperature, so the humidity will not condense into water, that only probably happen in cold country, where humidity is already low and you no need dry cab anymore.

Wet sponge is on outer side of dry cab, as the water/humidity inside the dry cab is always condense by peltier element.

Regards,
Arto.

 

[cjtune]

What do you mean by that?

If the humidity inside dry cab is not enough to condensate into water, that mean inside the dry cab is low humidity already.

If you said temperature inside dry cab is below the cold side of peltier temperature, so the humidity will not condense into water, that only probably happen in cold country, where humidity is already low and you no need dry cab anymore.

Wet sponge is on outer side of dry cab, as the water/humidity inside the dry cab is always condense by peltier element.

Regards,
Arto.

Yup, you have answered my question. I believe there is at least some sort of humidity or temperature driven controller that drives a TEC inside a dry cabinet if it uses one. Besides, TECs can reach sub-zero temperatures, especially with stacked TECs, on the cold side if need be.

As for the sponge, I can imagine that it is one continuous piece connecting both the cold and hot sides of the TEC. There will be a continuous capillary action as the moisture absorbed at the cold side wicks to the drier hot side (which is also exposed to atmosphere).
Anyhow, I've yet to come across an abandoned dry cabinet I can tear apart to examine...