SOLAR HOT WATER with black garden hose Pondmaster 1200 gph

[truebassB]

What about a water circulation system into the drum with one side of the tubing having some sort of radiator and being under a Fresnel lens? That sounds good,and it wont melt as it will be water cooled.

The only problem i can find is the efficiency and speed of heating the water

[MrAlvan100]

I wonder what the differance would be when useing a flat black oposed to gloss black paint?

[truebassB]

@MrAlvan100 The Black Matte reflects almost no sun light,the glossy radiates it away just like a mirror,so the Matte will make any surface hotter than one painted with Glossy paint as more sunlight will be collected in the surface to heat it. :)

You can see this in practice if you can find any Matte painted car under the sun with one other having the regular Glossy Paint.

[MrAlvan100]

@truebassB Thank you.

[MrAlvan100]

This is the second vidio I've see of the Rojas home projects. I commend you on your elegence and simplicity of your systems. Keep up the good work!

[built2bfree]

Bet the trick is slow circulation to allow the heat to build in the hose but not so slow the drum loses heat...so wrapping the drum like you said. A temp gun and a lil tuning the flow rate and your golden!

[fritzkatz]

Seeking affordable 500' black garden hose as current flow is just above a trickle.. though exits into pool over 100°. Don't want larger figuring that will move TOO fast to pick up heat but wht the hell do I know? Pure DIY on hunch, no calculations or research (till seeing this - if you can call this research- when I googled "black garden hose"). BTB Throughout the mideast, even non-desert mideast, rooftops do have just fifty gallon drums painted black as usually their sole hot water source.

[fritzkatz]

Got 500' black plastic HomeDepotOnline $30. Laid on white concrete slab took forever to undo coils flat in big racetracks. 6000 gallon pool drawn into 1/2HP submersible pump (driven by small solar panels and inverter feeding/drawing from marine battery) sitting in swimming pool (remove before swimming just to be safe) and running from 9am to 4pm (when I get home and go in) get a four or five degree rise which is just enough to avoid Polar Bear Club status midwinter Florida..

[XxGreenExpoxX]

Thumbs up for big tits

[Sutoraida1975]

I don't know if this comment has already been made but how much hotter would the water be if the hose were covered with something clear and housed in something insulated? Another thing to consider is the winding of the hose. It's hard to explain so I'll have to say that the center of it would be like an 'S' so that both either end can go to the top or bottom of the 'box' it's in.

[superspeeder]

Sorry if I came across as rude, not intended. :)

[phantomcharger]

I'm thinking if you ran a length of black hose on some blacktop driveway or roof you would see way more heat gain .

and wouldn't this work better if the hose wasn't rolled up? (more surface area on the hose?)

[pyrrhios]

as always, cool vid, and cute wife :)

[ella5024]

uhhh, another experiment, another blimp? Do you have fake aircraft bothering you?

[Khaos242Jeep]

I have been using black water hose for hot water n my shower for 3 years now.....its great n summer but winter kinda sukx

[ometec]

try another additional length of hose coiled inside the barrel under water - it should boost you heat gain.

[SWINGREGORY]

great !

best regards

[Minuvash]

Dear Friends, Hi

Visit iss4u dot de and solkav dot eu to learn more. Heating water with electricity adds up to global warming. Using copper tubes only work in summer time, while rubber tube when frosted makes the water hot and extra energy by a heat pump is forwarded indoor for space heating. In regions with long winter you can use sport tiles made of rubber tubes to make ice skating ground. Two brothers from Iran in 1978 started this experiment in Austria and developed it and made in EU

[chillydickie]

Hi, it may be the fact that the pump is too fast... at 1200 gph, thats about 1.3 litres per second i think... not enough time for the water to be heated up... probably try a slower flow rate...

keep up the great videos.

[BooGooNFlowoo4Evoo]

@chillydickie I was thinking that also. Maybe a longer hose coupled with a reflective surface, and a slower solar pump that works on a timer, so more water sits in hotter coils for at least a few minutes before it moves. Solar water heaters can work, they're just not as fast or portable. Solar systems in general seem to need backups... Rout the coil water into a conventional water heater that won't come on until well after dark.

[superspeeder]

Your videos are great and the message VERY necessary in these times, but did you stop and calculate what percentage of the temperature increase came from the heat of the submerged pump operating? A 100 watt pump submerged will be putting 100 watts of heat into the water. This does not mean the experiment is a failure, it will just help better understand how much of the heat rise is due to solar collection.

[DJMC5ive]

@superspeeder A 100 Watt pump that output 100 Watts of heat would be producing no mechanical function. It wouldn't be able to move, if it was 0% mechanical efficiency. I do understand what you are saying about the heat transfer though.

[superspeeder]

@DJMC5ive Assume the pump has an efficiency of 50%; 1/2 its energy goes into heat and 1/2 goes into kinetic energy (water motion). As the moving water travels through the pipe coil and then slows down inside the tank due to friction, it is converting the other 1/2 of the energy into heat. A very small amount of that heat will be lost through the pipe coil to the ambient air, and the remainder will be transfered to the water, heating it.

Stirring water with a spoon heats the water.

[DJMC5ive]

@superspeeder yes, but a 55 watt pump does not add 55 watts of heat!

[DJMC5ive]

@DJMC5ive or does it?

[superspeeder]

@DJMC5ive While reading your comments I get a pretty solid feeling that you do not have the ability to prove yourself right or prove me wrong, as doing so would require a knowledge of physics. Go read up on it (this should take more than 5 minutes), re-read what I wrote, and then comment.

Indeed, a 55 watt electric pump generates 55 watts of heat. EXACTLY 55 watts, not a watt more, and not a watt less. RESARCH this.

[DJMC5ive]

@superspeeder I asked a question, and didn't expect an asinine comment such as that. Have a good time being a jerk, superspeeder. You've helped in no way.

[superspeeder]

@superspeeder I will repeat, I am TOTALLY in support of these videos and the thought provoking messages they bring. What I don't support is internet garbage that gets in the way of facts. It is totally practical to use solar to heat a swimming pool! Peole do it all the time, and more of those who don't SHOULD.

[DJMC5ive]

@superspeeder and, I'm sorry I didn't think of the fact that the energy from motion would be transferred to heat. You didn't have to be so rude man.

[kondor1001]

If I had to design this to heat 50 gallons of water in one hour my setup would be... A 50 GPH pump, water taken from the bottom, through the hose and then back in to the top. A tap to remove water should be near the top and an inlet to keep it at 50 gallons should be near the bottom. This way, the warmest water is always taken for use, and as it get colder it falls until it reaches the pump and gets warmed up again. Thats how I would do it anyway. As long as you use less than 50 GPH :)

[alpineicecompany]

Dan I just posted a comment on the heat generated by your project video. And these calculations are correct. I am a psychometric engineer and work with this kind of calculations daily. Your viewers should also note that encasing the pex or hose in a insulated glass chamber would greatly improve their results. Also take into consideration your latitude and the month on the year by vectering the solar angle at that time. Oh and Dennise....concerning the hose DAN IS THE MAN!.LOL

[alpineicecompany]

Dan Some have made a comment about the heat gain from the 100 watt electric pump. They are in error. A 100 watt pump would only generate 314 BTU/hr. That would only elevated the 55 gal of water by 0.687 degrees F According to my calculations the surface area of the 55 gal drum would quickly disipated that minute amount of heat. As per your video This little operation created , 2967 BTU/hr

[GREENPOWERSCIENCE]

@alpineicecompany Thank you for the info:-) Also the pump is a magnetic driven impeller so there is an additional barrier from the motor and not the traditional friction.

[social3ngin33rin]

Where did you get the drum?

[stereotomyalan]

if you used the electricity for the pump for heating the water, it would be much efficient and without the wait and the hose. so i dont think this is much green.

[TheBluemnky13]

i noticed your hose had a shine maybe try the craftsman hose its a matte black and that thing gets real hot in the sun.

[krisk7]

Nice attempt, but agree that it's just a beginning. How much temperature gain can be achieved when heating this 50 gallon barrel with a 100 watt water heater? :)

[austrorus]

and how much is the cost of electricity and pum and hose, don't think it is worth do do it like that.

[sony01boy]

Just Love to wach beautiful women in this clip.

[pacotnk]

@sony01boy creeper



[mazwt44]

The average water heater is 30-40 Gal, which is more than enough to 2 people + In spite of what some of the Anal sphincter’s comments are... I think this is a great starting point Encase the hose in glass, etc, etc.. NO doubt that Denise is one very attractive lady its great to see that a geek can get a hot lady ;-)

[Peterwhitlock]

Come on! That is a bit INSULTING did not compare results and did not even bother to try. did not make barrels hot with reflections or use BOTH.... clip was worthless. The work was not done and sort of skipped over.... WHY?

where are the others to compare results? Barrel in the shade then in sun and then with reflectors only and then both reflectors and pump....sheeesh the effort is lacking here and the teaching is weak.... put some effort into it please!

what about weather? Sheeesh

[opcn18]

Back of the envelope calculation. 6% of that heat gain was waste heat off the pump.

[pleasanthacking]

i ment 1:41 .. those pesky chemtrails



[pleasanthacking]

man you have heavy chemtrails on the sky in the usa... ( @1:46 )

[sjoerdbeukers]

but will it blend?

[MachOverspeedsPlace]

It might be interesting to maybe remove the pump, increase the hose lenght another hundred feet, let the system thermal siphon, capture various readings as a baseline, and repeat a couple three times.

Then try various pumped flow rates, insulation etc and play with "tuning" it into something cheap and really useable. Around here, such a system might well make enough hot water to supply an oil field workers laundry (washing greasers). A much needed service.

Thanx Dan for planting the seed, Bro.

[Hamish121212]

Why does some perverted grub need to ruin the video with their comments?

[CommentsSurvey]

@Hamish121212 : I mark comments like those as "spam" and hope they will be removed. Hope you do, too. These are great videos and I agree: I'm tired of YouTube "grubs" ruining things.

[steveBB30]

If the tank were higher than the thermal collector wouldn't the water thermosyphon without needing the pump?

[skeetnice]

HEY I live in florida also im in Orlandooooo

[Stormrunner0002]

With all the aspects of the barrel you mentioned do you think that it may be better to insulate the barrel to reduce the heat transfer out of the water?

[TroIIin]

A blimp wtf? Where do you live the 1950's?

[wanjockey]

Thanks for sharing your videos Dan and Denise. I have been subbed for a while now and really enjoy them all. Keep on sharing.

[hobbyguy]

I would advise a little more cleavage in this experiment ;-) Now dont tell me we're all here to see Dan's hose! lol

[9tee]

"those clouds" ? or: "those chem-trails" ... restricting the sun rays.

[Hamish121212]

Why wouldn't a thermal siphon work?

[acoustic4037]

Your videos are great! How do you find the time to make them? If I'm ever in FL I want to buy you guys lunch!

[G58]

As always, great video guys. What would happen if you had a low voltage, low capacity pump running on solar power delivering the heated water to the top of the tank? Would that give the 100ft pipe longer to heat the water and deliver it to the best part of the tank? I think this might discourage cooling by convection - on the basis that heat rises and cools as it does so through cold water. Also, an insulated, sealed top would help maintain the temperature in the tank.

[Myxpykalix]

What i'm confused about is that a 7 degree rise in temperature doesn't seem like it would do anything? This has me trying to figure out how to make my solar hot water system. Where i am lost is that it would seem like you would achieve better results if you could control the flow off/on based on tempreture. Fill the hose, when it reaches a set temp send more in to replace it. With the constant flow you aren't giving it time to heat before it moves on,or am i just missing the point of the video?

[massimunex]

put a clear plastic cover over it that is somewhat airtight i bet it would build up a ton of heat. I'm guessing a lot of the heat generated by the black hose is just radiating away.

[NovusChaoMundi]

Don't need to be smart, just have a 100ft water hose.

[lostburro]

Denise, Do you really think that someone would make a perverted comment on one of your videos? But you're not even wearing the leopard print bikini!

Great video guys! Hope your vacation from youtube was rejuvenating! Looking forward to whatever you've got planned for 2012!

[FearTurtles]

According to my figures thats about 300BTUs right? Its kind of cool on how simple it is.

[AReptileMan]

I'm looking for a pump to move hot water from a cooper pipe around my wood stove. What do you think would be the best pump?

[onmyown12]

cool.... ops, I mean, warm :"))))

[calvinthedestroyer]

Just run the hose through my old black car. It can melt cd's on a good day.

[rainbowsalads]

@calvinthedestroyer lol .

[aSmellyKorean]

youre going to get cancer from that setup..

[aSmellyKorean]

more vids of your wife plze, i need to fap

[Gnomesmusher]

Gah. I wish some people would stop bringing politics into everything. I'm so sick of it.

[BlitzKdotCOM]

The Obama ad at the preroll is a killer. Too bad you can't control ads and get rid of this obama garbage!

[spinynorman1982]

If you ever get it really warm you could submerge your whole body in there. Then put Denis in it with you with your 100 ft hose and see what happens.

[wallonthefloor]

Where do you live that its 67??

[tallyhoroad]

Hahaha :) Good to see you two and speaking on behalf of Canadian hosers, we love what you're doing.

[Shannariano]

Dan, since these are experiments, try to go for an unpowered arrangement (like the radiator in a Ford T, if you know what I mean)

Intake at the bottom of the barrel, water fills the array of tubes (or your coil) and heats up ascending naturally. the water now warmer goes back in the drum in a continuous cycle.

Of course in the radiator the cycle is inverse

IMHO it's a good opportunity for testing if a really green approach can be achieved. now you still need electricity

[idahodad1]

That is warm well water, our well water runs around 50 degrees.

[choochoomamoo]

How about clear pipe with darkened/black water? The water would collect the light and would heat up while being insulated by the pipe.

[choochoomamoo]

Cool idea.

[cdltpx]

Dan if your air temp was 76 or greater you achieved equilibrium this happens passively. Your hose did aid in speeding this up but as you said if no insulation the container will only seek the temperature of the atmosphere it is submerged in. I saw a man that showers with a black gallon jug placed in the sun surrounded by some boxes and al foil. A 12 volt bilge pulp could serve to move water or install the tube high low to cause a heat elevator. INSULATE~Rod Paul 2012.

[SicSemperTyrannisx9]

@cdltpx I too am a fan of Rod Paul

[cdltpx]

@SicSemperTyrannisx9 Only thing that can save this country is return to the constitution

RP is the only candidate that will respect the constitution.

[vengencefrom1979]

@cdltpx respecting the constitution doesnt add up to diddly squat. its a set of laws subject to change, has been changed over the course of 200 years and will continue to change.

[cdltpx]

@vengencefrom1979 Say that from your FEMA camp I will be killed in the shootout when they come for my guns.

[vengencefrom1979]

@cdltpx i'm not worried about fema camps, the nazis in this country are, so you better think long and hard about who will end up with the short end of the stick, and or locked up.

[cdltpx]

@vengencefrom1979 I'm voting for Ron Paul OK !

[TheFujimoto420]

@vengencefrom1979 Yes and I suppose you don't agree that your rights that the Constitution gives you should be protected. Like your right to speak freely here. Or practice your religion freely. Or have guns. Need I say more? It's all fine and dandy until you're the one they come after. Then who's left to fight for you?

[Rockinghorseshart]

Hi Dan & Denise, just a suggestion- by arranging the hose in a rectangular shape, with the "coils" not touching this would increase the surface area of the hose. also, I suppose you could mount it on a black base board and encase it in double glazed window panels.

[locouk]

I was watching your videos where you put the hose on the carport yesterday, I take it it didn't work out too well up there? How about a coil of copper pipe and a fresnel lens to do the work???

[robot797]

every body needs a blimp cus blimps are verry pimp

[aaadream]

I like how she handles the hos ;) Nice test..yeah black hose works well for heating in sun

[LifeIsJustARide85]

great information in these videos. When they get better at scripting and editing. they could be the best.

Cheers from Denmark

[sonic503789]

everybody needs to get a blimp cause blimps are pretty pimp~

[buzzsah]

I have put together an 200 ft copper grid on my black roof and tied it in to my hot water tank so that it heats the water before it enters the tank. Now the tank runs less and cut my cost but 70%.

[electrodacus]

The specific heat of water is 4.186joule/gram°C or about 4200J or 1.166Wh to rise the temperature of one liter of water with 1 degree Celsius or Kelvin same thing (Fahrenheit is a different story).

Say for simplicity that coil area was 1sqm and was 1hour in 1000W/sqm sun with 80% efficiency about 800Wh

50galon are about 200liters 800/200=4 and 4/1.166 = 3.4 degree Celsius increase in water temperature you got about 3.6 Celsius difference on the top of the barrel that is close :)

[hahalolwtfnoob]

Hey Dan, do you guys live near Clearwater? I thought I saw you and Denise at an Applebees lol

[ThePresidentialTouch]

How about a Fresnel lens lid?

[LatteJonny]

@ThePresidentialTouch would not increase the amount of energy going into the water (it just concentrates it) unless the lid was bigger than the container and focused into it.

[paullie6719]

Thanks Dan and Denise. So you collected 50 gal * 8.35 = 417.5 lbs * 6.5 degrees = 2713.75 btu/hr = pretty damn good if you axe me! Nice job. Wonder how hot the hose got.

This gives me an idea. I've got 150 sq ft of glass on the south side of my house. If I built a thin wall covered in pex tubing painted black behind the glass and ran the pex to a water heater, I could have a nice hydronic system.

[101AOK]

Laying the drum on it's side and tapping from the side(that would now be the top) to fill the water would allow more even and faster transfer of heat to the drum. Standing it on end like this is a waste of energy and time. BUT...nice work regardless. Rock on or we'll hurt 'cha bad brother.

[jdocks777]

your arent fighting cloud, your fighting chemtrail dispersion, blocking out the sun is the new theme as the last 2 years. nice video.

[jdocks777]

@jdocks777 meaning they have been spraying more in recent years than ever.

[edv1777]

slow the flow down

[theMadUkrainian]

@edv1777 exactly.

[tectalabyss]

Hi Great Video.! If you were to put a small building with glass where the sun could hit the water pipe all day and wrap the barrel with a blanket of insulating material It would hold the heat into the night.The building would keep the wind off the pipe and barrel.Hope I made sense LOL.Just a few humble thoughts. Thank you both for sharing and caring....Tec

[Greatbloke]

Thanks for another interesting video. It reminded me of the one where you used 100mm poly pipe and bilge fan to heat air.

[deathguitarist12]

@GREENPOWERSCIENCE I suspect that you would have gotten it even warmer if you had put the pump on the bottom and the hose on the top instead of the other way around. That way you can be gaurunteed that you are taking in cooler water than you are putting out. I could be wrong on this though.

[czarwright]

put the 55 gallon tank on the table and the hose on the asphalt with one hose going in to the top and the other hose fitted in the the bottom of the tank . no wast of power and hotter water too. Solar showers , mine is on my black roof and tank is in side but higher then solar panel i made. hits about 120f in 70 deg weather , not great but my 1st try . a one way vavle is the only thing else add the system . Share the green, GPS =)

[2MCHNV]

the temp would differ also be higher if the hose was on a tin roof extracting heat from the hot roof

[30GB]

use copper with black ceramic paint because rubber hose will radiate some chemicals when its being heated into the water

[nevyn1]

a man who can handle a 100ft hose....

you lucky lady...

[AurimaxII]

@nevyn1 denise was right :D

[hobbyguy]

@AurimaxII Denise is always right! She's a woman, when are you going to learn that women are always right! LOL ;-)

[ARTnSKIN]

i am looking to build a DIY solar shower setup for campers. Any Ideas or a setup of your own would be great. I am thinking two 10mil black trash bags with a drain and tube shower nozzel setup less then $5 bucks

[Knight3191]

I don't mean to be rude but what ever happened to that Magnetic "theoretical" perpetual motion follow up video?

[dsalerno83]

nice video. 100ft black water hose. pervert! jk

[willtrip711]

3rd!

[shartne]

how about next time heat only 30 gallons of water and use twice as much hose and and put a water heater jacket on the barrel with a lid.

[justicetrooper]

@GREENPOWERSCIENCE Was that pun intentional?

[GREENPOWERSCIENCE]

Warm up video after a little 27 day video break:-)

[chop98]

@GREENPOWERSCIENCE It's about time, Dan! If not for you, I wouldn't be the older pyro type with my Fresnel Lens and a pile of leaves for the Fall and Winter. :D