Idea for alternative 12v AC?

[dales133]

I'm not sure if you've seen these but it's what I'll be using in mine.
http://www.transcool.info/product/12-vo ... ve-cooler/
I've seen them running and they are super efficient and run all night on 2 liters of water.
Run on 12/240v and nice and small

[Vedette]

I'm not sure if you've seen these but it's what I'll be using in mine.
http://www.transcool.info/product/12-vo ... ve-cooler/
I've seen them running and they are super efficient and run all night on 2 liters of water.
Run on 12/240v and nice and small

Thanks for this one!
Now we are getting somewhere??????
Good Roads
Brian & Sandi

[dales133]

Postage isn't to bad to your side of the world and they are brilliant.
Less than a cubic foot in size too

[GuitarPhotog]

But they are evaporative coolers, they rely on low-humidity to operate. Good in the desert no good in Florida.

<Chas>

[Vedette]

Good to hear from you Charlie
Brian

[dales133]

But they are evaporative coolers, they rely on low-humidity to operate. Good in the desert no good in Florida.

<Chas>

I dunno so much they use them in truck cabs and the like in darwin and that is every bit as hot and humid as Florida. In fact it's probably closer to the equater.

[MtnDon]

We live in a desert area. I can vouch for the fact that evaporative coolers only work well in low humidity. When the monsoons arrive their effectiveness drops precipitously. Instead of being in a dry hot you are then sitting in a humid heat. People still run their swamp coolers but they are not too happy.

[GuitarPhotog]

But they are evaporative coolers, they rely on low-humidity to operate. Good in the desert no good in Florida.

<Chas>

I dunno so much they use them in truck cabs and the like in darwin and that is every bit as hot and humid as Florida. In fact it's probably closer to the equater.

I can't say anything except that they are swamp coolers. The site call them evaporative coolers, and they sell replacement evaporation pads.

Believe what you will, physics always wins.

<Chas>

[dales133]

Fair enough

[Vedette]

But they are evaporative coolers, they rely on low-humidity to operate. Good in the desert no good in Florida.

<Chas>

I dunno so much they use them in truck cabs and the like in darwin and that is every bit as hot and humid as Florida. In fact it's probably closer to the equater.

I can't say anything except that they are swamp coolers. The site call them evaporative coolers, and they sell replacement evaporation pads.

Believe what you will, physics always wins.

<Chas>

So Charlie
What you are saying is these might be the answer if we all stay on this side of the "Continental Divide"????
105 degree overnight temp in Nevada, Arizona, or Washington State would be a comfortable 60 degrees with one of these compact little units in your teardrop???
The alternative would be sitting up all night drinking some of your icy cold beverages!! Waiting for daylight!
Good Roads
Brian & Sandi

[MtnDon]

If your temperature and humidity fits in the light blue range you're golden. If not....

[MtnDon]

Regarding the transcool... Even if used in a TD or small trailer that was in the desert I wonder how effective they would be after several hours of use. It seems the unit is meant to be placed in the space to be cooled and recirculates air through the unit. That slowly will raise the interior humidity level as it cools. Once the air is no longer dry it is not an effective cooler. At least that is how the theory works. In the SW USA deserts where swamp / evaporative coolers are popular the units are mounted outside, draw outside air through the wet filter media and blow the cooled air inside. To operate there must be an air exit; an open window usually. That way the dry outside air can always make 'cool'. The interior humidity does rise some but when you start with very dry air that can be good. They are effective used like that, in the right conditions. It just seems that recirculating wet and wetter air can not be effective. May as well just have a good ventilation fan.

[Mojave Bob]

Looking at the Transcool, or some other small evap cooler, that looks great to me for sitting outside reading, or something like that, if it is a dry enough climate, just to provide a little bit of a cool breeze. But, I agree that in the closed space of a tear, it would be less than ideal.

One of the things that we all battle in a tear is keeping humidity levels DOWN. I would not want to do anything that raises humidity, unless it was a standard high-airflow swamp cooler that has a window open and provides constant air-exchange. And, as mentioned, that requires a dry climate. In fact, a friend of mine who is a long-time resident of Tucson, AZ, complained to me that her swamp cooler isn't very effective anymore, because all the landscaping in the city has raised the humidity levels too high. Compared to the midwest, Tucson is pretty dry...

[Tucguy]

Being a life long resident of Tucson, we are very much in the know of how evaporative cooling works. You must have airflow from outside, through your space to be cooled and then a way to exhaust almost the same volume of air to the outside, be it a window or an upduct through the attic space to lower that temperature also. Air conditioning works by using a completely enclosed space. New air into the system is by design of the unit itself, usually about 10% of the volume being cooled. The air is dried and cooled as it is recirculated over and over again through the air conditioning unit. In Tucson, the average relative humidity is less that 15% and adding water to the air flows gives you a good drop in temperature for cooling. Starting about July 4 we have the Monsoon which adds humidity from the Gulf of Mexico and the Gulf of California. Our relative humidity then will stand any where from 40% to 80% and the temperture drop from adding moisture to the air is very low. That is when the closed dry effect of air conditioning is needed. Many homes here have dual systems to take advantage of the low energy required to use evaporative cooling instead of air conditioning for most of our dry summer. The high humidity levels are only about 1/3 of our 7 month long hot weather. I hope this helps the understanding of evaporative cooling vs true air conditioning.

[Dobromofo]

I am thinking this and a generator for boondocking in hot weather


http://www.globalindustrial.com/g/hvac/ ... onditioner