A new kind of solar heaters of the "trickle" type
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- Опубликовано: 1 окт 2024
- This video will describe this very simple and cheap solar heater which is a relative of these well-known solar heaters. It is obvious that solar energy heats this black metallic surface which transfers the heat to these trickles of water. This type of solar heaters is usually called this term, and it was invented more than 50 years ago. For example, this is an old photo of similar solar heaters which were used for space solar heating of house.
This is another example, and this is a plastic pipe for pool water, and here we see trickles of water which take the solar heat from the metal sheets of the roof. After that, the hot water enters this conventional rainwater harvesting system and returns to the pool.
My idea is that these channels for water should not be vertical, but horizontal, and the idea of horizontal channels has been experimentally tested with this my solar heater where water flows are moving in these directions.
Now we see how I made my solar heater, and this is aluminum foil with a thickness of 35 microns. I must warn you that this thin foil has a short lifespan, and I am making this solar heater just for a few experiments. If we want to make a similar heater with a long lifespan, we should not use thin foil, but sheets of steel or aluminum.
Let's look at how water moves through my solar heater, and this is the water inlet. This is the water outlet. These arrows show the directions of the water movement between the inlet and outlet, and here we can notice small waterfalls. Now I show the waterfalls in more detail.
We understand that the water is moving through my solar heater along a serpentine road which can be depicted something like this. Unfortunately, the serpentine is accompanied by several disadvantages which are corrected when the water moves in this way, when all the water flows move the same direction.
The sun is shining now, and we can see that the inlet water temperature is 25 ºC. Solar energy heats the water, and therefore the outlet water temperature is 11 ºC higher than it was at the inlet.
Of course, we can improve my solar heater, and for example, we can cover it with transparent film or glass sheets. Or we can add similar mirrors which increase the thermal capacity of my heater and its heating temperature by about 2 times, and these experiments were shown by this my old video a few months ago.
Let's look at the advantages of our solar heater if its water flows move horizontally, compared to this well-known solar heater with vertical trickles.
Now I show the first disadvantage of the well-known solar heaters, and we see these white stripes of salt, although this heater was operated only a few hours. We understand that such white stripes can degrade the appearance of the heater, but this disadvantage is absent in the new design of our solar heaters.
The second disadvantage of these well-known solar heaters is losses of water due to its evaporation in the channels, but the evaporation for the new design is many times less.
Our next disadvantage is relevant for cases of using similar transparent covering which increases the temperature of water heating. Unfortunately, here we see water condensate on the inner surface of the covering of this well-known type of solar heaters, and the condensate will increase dramatically if the temperature difference between the water and ambient air will be more. It is obvious that the cause of that condensate is the evaporation of water from these channels, but the evaporation from the new type of solar heater is noticeably less. In addition, we can minimize that evaporation if we close these joints better, but we still have to find a solution what to do with the large evaporation of water from these places.
I have been thinking about a problem of how to cool solar photovoltaic panels in a marine environment , and this video gave me a idea ! if I trickle fresh water down the panels , it will remove heat AND corrosive salt ! Then the water could be used for hot water if the salt content is not allowed to get very high. Do you think this would work ? Would having the water on the front , back , or both sides work best ?
I really like your creative solar heaters:-)
Have you thought of saving the energy in a cheap and efficient way too?
I just installed a pipe in the ground of my greenhouse. Greenhouse is on a insulated foundation. The greenhouse function as solar collector and the the pipe is equipped with a solar driven ventilator. In this way the energy is stored in the ground for many days/weeks dependent of the deep pipe.
Would the Reflexion be a Better option?
tanks for sharing, congratulations
На 2.25 - "трекер" из металл бочки (солнце выше - давление воздуха более в бочке) + "насос" для поднимания/опускания зеркала. Бочка лежит по направлению восток-запад.
Always Great
To get thinking
After your
Video s
You share
Good Thought s
😎🌅🌄
This is a great example of taking a proven design, improving on it, and making it as affordable as possible. Well done! Looking forward to your next videos. Thanks for posting.
I really like your work, keep it up!
of all these models which one is most efficient in your own opinion