by NorthEGPhoto » Mon Jul 23, 2018 8:02 am
I'd considered building something like this - similar in principal to how a water cooler works for a computer. two radiators, a pump, and a reservoir, couple of fans. one radiator and fan + reservoir and pump goes outside under the trailer in the hopefully cooler shade, while the other radiator and fan goes inside, with a drip tray to deal with inevitable condensation.
The pump could be controlled via a PWM controller, as could the fans. you'd run the pump so the fluid moved from the inside "hot" to the outside "cool" and the fan would push air through and cool down the fluid before returning inside to absorb more heat. the problem is it would possibly cause condensation to form inside, which needed to be dealt with. maybe you could even drink it if you wanted to. also, you'd need pretty big radiators in order to be efficient at all.. adding weight, and then also maintenance concerns. You could flip the coolant to something other than water which would help the system last longer without calcium buildup/etc but then if you do form a leak things get even messier.
This thing looks like it just lets the water soak through a cloth and blows air through it, using the evaporation cooling effect.. Probably not very effective on humid days. You might get away with putting a dehumidifier in there as well, but then you'd just be better off getting a proper A/C unit which cools the air and removes moisture anyhow.
"In the morning, the light is golden, in the midday 'tis time to nap, and in the evening the light returns. Into the night the stars shine brightly, now if only the moon would stay out of sight." - Some photographer