Harnessing the Sun: The Power of Evacuated Tube Solar Water Heaters

In this video, we take a closer look at evacuated tube solar water heating systems.
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CONSULT WITH ME
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Chapters:
0:00 - Intro
0:25 - Evacuated tubes?
1:34 - Low Pressure Systems
4:23 - High Pressure Systems
6:04 - Which one should you go for?
7:55 - Capacities & Price
9:33 - What's your experience?
A special thanks to Seven SS Stars Kenya

[@meninpapin]

You're the 1st person who clearly explained what the difference between a low & high pressure system is

[@solarwaterheatermachinery]

they use Assistant tank. That means the system is Low Pressurized or Non Pressurized solar system.

[@Mramoyaw23]

You could have a low pressure system without an assistant tank. It would have an electronic switch to regulate the flow of water into the tank.

[@solarwaterheatermachinery]

@@Mramoyaw23 That's one of the way. And also It seems the system didn't use magnesium rod. correct?

[@AldenAranjo]

Very true. From India

[@Hanni_Hann]

An exact explanation, for everyone's understanding, something rarely seen on KZbin. No off-topic footage, no uninteresting things, just what the title says. Congratulations from me.

[@simonmadileng5486]

This man is a star. Watching from South Africa.

[@deadsimpleror9757]

This is THE best video about solar heaters I've seen. There are too many others from India and Pakistan but they just go with installation, begging for subscriptions and shares etc etc.. Your video is well categorized, TO THE POINT information and that's it. Others should Learn from you. Thanks, From Pakistan

[@PropertyNoma]

Thanks

[@L0VEB0AT82]

Fantastic explanation. Uncomplicated and simply laid out for the "didn't know"people like me!! Presenter with a delightfully humble style.

[@PropertyNoma]

Glad it was helpful!

[@synthwave7]

Greetings from South Africa - this is the bets explanation ever . Here we have many Retrofit systems - evacuated tubes connecting to the existing geyser inside the house.

[@PropertyNoma]

Thanks for your kind words!

[@chrisbaker3066]

This is the most accurate description I have seen so far! Well done.

[@permi8963]

Well done to you for a great explanation! Absolutely perfect description. Thanks for explaining and sharing your knowledge!

[@dicksonouma3305]

this is very good sir..... straight to the point, good explanation , no other stories .... just purely amazing.

[@mosessolo2852]

U are just the one I fill left out that I hadn't subscribed to the channel earlier enough ...precise n informative explanation

[@sabatotangredi1580]

I have 2 low pressure tank for total of 300 Lt of hot water ,I got my system almost 25 years ago and still going strong even if 2 tubes have lost their black colour (have to change them soon....wouldn't change the system with anything else. Small downside: the 3 top floor has less pressure the the other 2 floors but still the best/simple system out there.

[@thestone3849]

Fantastic. Very clear and nice explanation of the systems and thanks for clearing the difference between low and high pressure system

[@tianapaul2275]

Brilliantly explained Thank you!

[@DescubreAntigua]

Among the best detailed explanations on how this works, congrats, quite detailed.

[@PropertyNoma]

Thanks, glad you liked it

[@ben54322]

It works. I installed in Peru, south America. Thanks for the info

[@PropertyNoma]

Awesome

[@sNEAKYnIGHTmUPPET]

By far, this is the BEST solar water difference explanation on the internet that I've seen so far. Well done sir, hats off to you.

[@PropertyNoma]

Wow, thanks!

[@err2006]

great video, thank you very much!

[@ngarip]

thanks for the detailed video. Clear and touches all aspects..

[@thericnas]

well explained Mr. Noma thank you

[@MainaGakuru]

Am looking to install one, and I've learnt from two of your videos. Thanks.

[@thomasmurray4717]

Thank you for an excellent job. 👍👍

[@tinykamvura1145]

Yes, I recently installed one. Thank you❤

[@user-ts4iq6fp2h]

Great explanation. Easy to understand thank you Nick , at least now I have an idea of what I want.

[@communitarianunion]

Thank you so much for sharing your knowledge. Much appreciated

[@erichpizer1]

i use 4 x HP tubes do add heat to my koi pond for winter having built a simple cycle system myself with a relatively low flow rate and using simple pvc tubes and large dia pipe for the small tank. still working out the kinks but its a cheap easy way to heat a koi pond slightly to try to keep 3000 litres close as possible weather depending to 20-25 deg c. great video good to the point presentation etc

[@kentbeatty751]

Great job Nick!

[@fredrik-ekelund]

Excellent explained. Thank you!

[@PropertyNoma]

Thanks

[@rajendrapandya1929]

very nice presentation - comprehensive description.

[@michaelnoble5056]

You deserve more subs. Great content.

[@ericnjoroge7944]

You did a great job explaining the working process of the solar tanks.. thanks a lot

[@PropertyNoma]

You're welcome Eric

[@SadyMohammadRidoy]

Sending Thanks and good wishes from Bangladesh. A very well detailed video.

[@sandipphadatare2702]

That's the way of explanation I like it buddy it helps me lot. ❤ From India. Keep it up.

[@johannwolf1]

Thank you for the careful explanation - I'm very curious about temperature performance during rainy season, where there may be cloud cover and only a few hours of direct sunlight per day... if at all.

[@254barbous]

Great explanation!

[@user-iq8kd6ts9p]

Thanks bro for your explanation

[@sergei971]

You explain very well. Thank you

[@PropertyNoma]

You're welcome

[@Philip-lg5en]

You really know how to explain how the whole system works

[@robindas1207]

Very good explanations

[@mojalefamoeketsi1554]

Perfect presentation 👌

[@reynantechantioco3372]

Very Informative Sir, Thank you for sharing, i've learned a lot.

[@RonoKiprop-nk9rd]

Big up, we mzee 🤝🔥

[@PhysicsWithBen]

You are a SCHOLAR. Watching from Nigeria. God bless you. Application of the topic Modes of Heat Transfer.

[@muhsinalhameed6408]

Thank you very much

[@oligarchytheatre777]

Amani brother!!! Thank you from N.America...😊

[@stigprincip2722]

Thank you, vvvv much!

[@manatee_flips6811]

Thank you!

[@torres8065]

you should look into it ...very important

[@josemontes6827]

You did a great explanation, thanks from MX

[@pyronitro]

Thank You for the Clear and concise explanation!

[@PropertyNoma]

Glad it was helpful!

[@mikekelly4222]

Very good video. Clear and easy to understand.

[@AnubhavApurva]

Good job bro !

[@robertnelson3179]

Thanks for this. I had never heard of this before.

[@PropertyNoma]

You're welcome Robert

[@RJ-er3gv]

We have Viessmann vacuum tube solar hot water system in conjunction with our boiler and a super insulated water tank. On the west coast of Canada it works amazing even on over cast days. We use solar power for the pumps since our tubs run horizontal and the tubes are set at the optimum angle for our latitude. This way the system sits tight to the roof and out of sight. I can see how a low pressure system could make a great for off grid shower.

[@Kog_media]

Great explanation of the solar heating system 😇

[@aaronzulu7449]

God bless you too

[@harshadsalunke1580]

great video!

[@masongovender9231]

Very well explained, answered many of the questions I had about these. Thank you. 🔥

[@chowwow4950]

Well done 👍

[@evilroyslade2491]

Great video, thanks

[@PropertyNoma]

Thanks a lot

[@mintheman7]

Thank you for the video. Hard to find info on passive solar water heater here in US.

[@garethmclean7128]

You make it so simple.

[@PropertyNoma]

Thanks Gareth

[@nathinasilo7594]

Thank you for sharing

[@PropertyNoma]

You're welcome

[@RemjiusMiyaiodongo]

I need to attend one of your installations and learn there..

[@krishanrana8674]

Thanks a lot sir.

[@PropertyNoma]

You're welcome

[@TheMimixa]

very well explained

[@PropertyNoma]

Thanks for liking

[@charlesomwega9302]

Good work bro

[@MrMudEagle]

Nice video, well done.

[@PropertyNoma]

Thanks

[@collinsrutto352]

Awesome!

[@PropertyNoma]

Thank you! Cheers!

[@aaronzulu7449]

God bless you too l like it

[@nashthakker9382]

I enjoyed watching your video. You really did well.....big thank you. I am a Ugandan and i work as a natural gas heating engineer installing heating systems in the uk. I have always wondered why our homes in Kampala don't have such evacuated heating systems. One thing I would like to ask you is the risk of legionnaire contamination in tanks. Is this something anyone have experienced in African using this system? Many thanks

[@PropertyNoma]

I have no idea about legionnaire contamination.. Could you elaborate more on this?

[@maxfende2716]

Great video

[@PropertyNoma]

Thanks

[@drashavijairao5418]

Dear Sir, you have explained the system very well. My small tank was replaced with pvc pipes by the plumber during that time he said the two pipes are leaking. Now he is not coming to repair.I have three hundred liters solar water heater having 30 tubes, two tubes are leaking. How to change washer and measure size, please explain.

[@johnarnold893]

I have an Evacuated Solar Tube system I installed in 2007 here in south western Canada. The solar tubes are only connected to a manifold with no storage at the top. I have 4 panels of 20 tubes each. The hot water is circulated into a 160 gallon stainless tank I have fabricated. It is basically open on top with an insulated lid on it with insulation on all other sides. I coiled 100 feet of copper tubing inside the tank and the service water to the inside gas fired hot water tank goes through this coil and extracts the heat from the tank so there is no connection from the water in the tank to the hot water used in the house. There is a very small low powered ceramic pump that circulates the water from the tubes to the tank. In winter there is sometimes a lot of cloud cover here so the water doesn't get heated. We get temperatures down to -20 F and the system has not yet frozen. My tubes are the cheaper version low pressure tubes. You could describe these tubes as being like a coffee thermos. The inner tube coating absorbs infrared radiation from the sun. If you left one of those tubes outside in sunny weather even at 30 below zero the water in the tube won't freeze. In fact there would be steam coming out the top in bright sunlight.

[@PropertyNoma]

Thanks John for such an informative comment. Learned a lot from your DIY project

[@samuelolteanu]

I've got an unpressuriesd 24T 200l system. I've just put a temp sensor at the bottom of a tube to see the water temp stratification in the night. Its still freezing outside so no water, but the temperature grows immediatly over 128C (max sensor temp) in sunlight and takes around 3 hours to fall to ambient air. Good stuff, cheap, but hard to install. I've removed with no problems a tube with water inside last year. I plan to calculate a liniarity between tank water temp and tubes so I'll know when it's safe to fill or drain earlier in the spring and farther in november and maybe install a low power heater for that .

[@PropertyNoma]

Thanks for the info Samuel

[@PropertyNoma]

Thanks for the info Samuel

[@masongovender9231]

Brilliant, you should publish the information somewhere and drop a link.

[@gtorresb1]

Nick I am very new at this and have purchased two solar panel water heaters for a home at a beach front house. This house is located at latitude 11.95ª North, hence we have sun all year long. The Panel will be placed in the south to north direction and the roof has a slope of 10ª form north to South. In your experience at what slope from the horizontal do you recommend we place the panel tank to guaranty we have optimum convection flow from the tube to the tank. Thank you.

[@robertbutrus2887]

great explanation, i already installed a unit at my house it works great at the sunny days but it rarely reach 35 degree during cloudy and rainy days, i wonder if you can use an alternative light source by night like strong projector , will this work ? and did any one try to put a source of light exposure to the tubes?? please let me know , again thank you all.

[@omaryousifkamal4290]

thank you african freind.

[@girmatafesse3456]

It is good work. Is it necessary to concentrate the solar radiation? I have been studying about the impact of nanofluids on heat transfer from solar radiation. I need practical work on this kind of experiment. In addition, like in Kenya, in Ethiopia, there is excess sunlight throughout the year. Please, if you have such kind of project, let me know and participate in it. Thank you so much for such an interesting video.

[@Leberteich]

3:07 So the convection is a counterflow within the same tube? Cold water flowing down / hot water flowing up at the bottom half / top half crossection of the same tube, the flows meeting in the middle... without mixing?

[@torres8065]

all is needed, is a cooling system to make it work.

[@thomasmurray4717]

Sir, on the high pressure system, when the alcohol flashes off, it’s there any way to force this vapor through an orfice into an evaporator as in a refrigerator?

[@MahmodMando-dk8iv]

You are boss

[@torres8065]

this could save our drought crisses

[@user-rf9sd2wg8h]

What about if the hot water is coming from the assistant tank what do uu do

[@LabRat6619]

You need a building with lots of use of hotwater, kitchen, big family etc.

[@torres8065]

(Jed kin ) has a very good intersecting comment this system we can us it to convert salt water into drinkable water.

[@zavnet]

Thank you for a great presentation i now understand the difference. I recently purchased a high pressure system. can you explain what happens if I don't use the water heater in a day or 2? if I am not at home I was told that the pressure will build up and could damage the water heater.

[@PropertyNoma]

As long as there's a pressure release mechanism I think your system will be okay...kindly consult your local solar heater technician for clarity

[@zavnet]

@@PropertyNoma thanks for your reply, there is a pressure release valve on it. I was thinking I could cover the solar tubes if I am going to go away for a long time and turn off the supply of cold water to it. Could that help?

[@PropertyNoma]

@@zavnet I'm not really an expert of solar heaters but I think that can help as long as it's only a few days.

[@jedkin5651]

Good info, which one is suitable for salty borehole water?

[@PropertyNoma]

High pressure systems are recommended because there's no water filling up the evacuated tubes. But salty water will require more maintenance to get rid excess buildup.

[@erichpizer1]

also salt water will eventually corrode the copper tips of the tube so keep an eye on it

[@Qoota1996]

Good video! May i asked how to get cold water up to a roof installed low pressure system without using a pump? Thank you!

[@PropertyNoma]

High water pressure from your local municipality can direct water into the system without a pump. Or you can put up a storage tank above the solar heater to direct water through gravity. But this option will need a pump to take water into the storage tank

[@Mramoyaw23]

Not possible

[@sagarsunny5944]

Without pump?? Take one bucket and go there to fill it Manually

[@shecktv]

Can you also cover how to do raised foundations on black cotton soils?

[@PropertyNoma]

If I get a site with a similar issue, I'll make a video in future.

[@kennedymuchoki5208]

Waiting for this content too🙏

[@westonlee9778]

Howdy I’m concerned about the glass tubes getting broken if hit by a rock or something. Can the tubes be covered with a glass pane and still be functional? Thank you very much

[@PropertyNoma]

Maybe if the glass pane is transparent, but I think it will negatively impact the heating capacity of the SWH

[@TushemerirweDenis]

Water heater and solar heater among the two which one is the best

[@user-mw8jy9sx1w]

HOW to calculate heat loss tank coefficient ???

[@BeHappy-ic6db]

here in 2024...thankyou for this great explanations

[@esonic-pramoninisvalymasul5784]

Hi, team How to clean it? What is cleaning maintenance?

[@nashthakker9382]

I would suspect the build up of limescale would be of particular concern. A low cost solution would probably be to add to the tank citric acid and flush out thoroughly.

[@debongodenislee4675]

I am sooner install one for higher pressure like 2ool Ian water engineers. thanks

[@PropertyNoma]

Fantastic

[@princemaj-hp7go]

Grate job with a nice explanation can I have your contact

[@gikurudennis-go6vj]

Can ppr pipes do the pipe fitting of the systems??

[@PropertyNoma]

Yes they can

[@unnikrishnannairkrishnannair.]

Three glass flat plate heater 270 degree

[@everydaythings2016]

Great informative video... A lot to learn from. You have my like and subscribe my friend...

[@PropertyNoma]

Thanks for the sub! And welcome to the community