Going a second pass after yesterdays dismal results
I made a second pass at the solar heating of camp water today. The overcast did burn off adn clouds mostly went away. not a particularly hot day, but the key here is sunlight more than temp to get this to work.
First three hours was about like yesterday, not enough sun to make progress.
Then there was good sun and I was getting 8 or 9 degrees of gain per hour.
then it peaked, and then it fell off, and that seems tied to the ambient temp as well.
I think there is a direct relationship between what it can gain, and what it loses off the shady side. So radiant from the sun, good. but there is radiant off the back side as well and the threshold seems to be about 35-40 degrees from ambient. It's peak was 110 F with an ambient temp of 70, but that fell to 104F at 68. I did find that in the heat of the day, trading sun sides front to back seemed to do better.
I also want do a side by side test with one of my stainless steel wash stations, to compare temp rise. I know I have used a reflector off the back for the SS tanks with just aluminum foil, but I can also get mirrored plexi from Tap plastics and make a good reflector.
I'm also thinking this plastic tank can benefit from a "bed" of Styrofoam for the back? I'm also wondering about the ability of the thick black plastic to get heat into the water, vs, the SS (painted flat black)
This is the GoSpout(R) water sprayer I've been testing just to get a read on if its a good option. I like that my wash home built Stations stand securely, and are easier to get on and off with one person. Moreover add a riser and mine are showers, easily, the GoSpout need to set on something chest high and is a hassle to lock open flow. The sprayer on the GoSpout has some headiness, but now you are one handed?
One advantage the GoSpout and Hudson sprayer based units I have made have, is a built in air pump for pressure