Leading the fashion and low carbon life is the goal of new energy

free air conditioning

by:NULITE     2019-09-07
Technically, it should be called a heat exchanger, which we affectionately call a water cooler, but it has provided us with free cold air for more than 20 years, so it certainly works.
Not long after moving here. Montana)
I noticed that the water in our well was really cold, less than 50 degrees.
I built this heat exchanger to take advantage of the cold source used in the house in the summer, as a by-product, it will heat a little before the water enters the garden because the plants seem to care less about the super cold water.
There are good benefits along the way, because in any case I would pump the water out and the only actual cost would be the power of the box-type fan that runs air through a copper pipe.
How good is it working?
We hit the heat in July at 112F, which is the hottest in my memory.
The internal temperature is 76F as the cooler runs all the time.
I hardly want to go out and move a sprinkler.
Well, you have to move the sprinkler a lot, but it does keep the grass green.
In addition, if the humidity gets higher, the water will condense on the exchanger as if on a cup of cold water.
So I put the towel under to absorb the moisture.
If it\'s really hot, I have to change towels a few times a day.
I just hung the wet suit out to dry at the heat and hung the dry under the cooler.
It takes some tricks to put it together, but once it\'s done, it\'s not maintained, except when I put it outside in the winter, it freezes some of the remaining water in the tube, and broke it.
Be sure to take out the water and put it where it freezes.
Another drawback of it is not beautiful, but it is unique and true \"green \".
You need to have cold water in order for it to work.
The colder the better.
Buy a standard waterproof thermometer and run in the water outside for a while to see what the temperature is.
Unless it comes from a cold source, this may not work where you have municipal water supply.
In addition, you will need to have enough ground to water so that you do not water your garden and lawn.
This is probably the best in rural areas.
After turning off the fan, the water outside the temperature of my copper tube is 48F (
Infrared non-contact thermometer reading)
For my heat exchanger, I used a copper tube with aluminum sheet.
This is the same material used in the hot water substrate heating system.
I bought mine a long time ago, so I don\'t know if the same thing is still there, but there should be something similar in the market.
Plus, mine is free.
I found it in a pile of garbage from the local landfill, apparently discarded by the contractor as scrap for heating work. (
I used to get all my firewood from the trees cut down in town in the landfill, which has changed with all the new laws.
Now, instead of being allowed to remove the wood from the landfill, I was buried by them, go ahead. )
I suspect they threw away something like this today and the recycling price is so high, but you should check with the local contractor to see if he has anything.
He might rather sell it to you cheaply than bother with recycling.
If you can\'t get the shards then you need new ones.
In order to install the standard box-type fan, these sections need to be about 21 inch long.
Stacking one on the top of the other requires 7 pieces to reach the top of the fan.
This will make a difference if your fins are smaller.
You also need the elbows to connect the parts together and there are a lot of small tubes.
Scrap is also working here, not cutting the full length pipe.
Initially I started with a layer of tube, but after seeing how good it was, I added another 2 layers so my tube had 3 layers of hot fins.
This is a good number.
It\'s hard to walk around and it takes up a lot of space.
There is not enough contact with the air to cool.
Complete the end with accessories that can be connected to the hose.
You can use the connection hose dedicated to the washing machine, but I just cut the part from the normal garden hose.
The bigger the diameter of the hose, the better, if you use small hoses and pipes, you limit the flow of water to the outside.
All of this hardware is available at any local hardware store.
Stroll around at the best price.
I put my elbows together with 42 elbows.
Not much is needed in terms of tools.
The pipe cutter is essential to measure tape and marking, flux and solid core welding and rag to wipe the pipe.
The pliers are used to fix the pipe when you Weld, the part is very short, so the whole thing is very hot.
You should also have some fine sandpaper or sand cloth to polish the accessories.
It helps to keep the solder better.
If you have not done welding before this, it will be a good practice.
Remember to do it outside or in a garage with lots of ventilation.
Give yourself enough space to observe anything combustible.
Make sure it doesn\'t light anything if you drop the torch.
Simple things are certain, but people do manage to light things up.
Make sure the solder joints are fully filled.
If you take the time to do the right thing, you won\'t have any holes when you\'re done.
Keep in mind that hot liquid metal drops when going downhill.
Don\'t hold it on your leg.
Assemble these parts separately and then weld them together after the welding is completed.
Make sure the connector of the hose is at the bottom, and if you use 3 layers, you have to run the pipe from top to bottom to make both connectors at the bottom.
You can see it in my photo.
There is a good thing about using copper, and if it doesn\'t fit, you can take the joints apart and do it again.
The welded joints themselves are not strong enough to combine all of this, especially after they are filled with water.
I tied my hemp rope together with plastic hemp rope, because I had this kind of hemp rope at that time and it worked very well.
Today, I may use nylon thread with hemp rope.
Compress all together.
Whatever you use, make sure it is tightly connected so that the joint is not stressed.
Adding some kind of handle also helps so you can pick it up easily.
Please note the hose connector at the bottom of the picture and the long tube that changes from the top to the bottom.
One step I forgot to mention is to do a stress test on it before you bring it into the house to prevent leakage outside.
Pass the water through it until all the air comes out and then leave it under pressure to check if there is any damp place.
I added a feed pipe from my pressure tank and piped it directly into the connecting box on the floor.
I added the valve, one on the input and one on the output and bypass valves.
Then continue the feeding pipe to the outside.
Yes, if someone opens the valve without connecting the cooler, it will spray water everywhere.
But no one has so far.
The only time I have a leak is when I try to use snap on the hose connector.
They are very convenient, but the water is leaking.
So they work well outside, but don\'t use them in this app.
I should use ball valves for connectors, they limit the flow of water less and turn on and off faster.
I may change what I have now to a ball valve in the future.
Place the towel under the switch, check the hose and turn on the water.
You can hear gurgling when the air goes through the pipe.
Open the sprinkler outside.
Turn on the fan behind the switch, it\'s almost the same. Free Cold air.
Depending on what you can find, the original parts may make you a bit of a cost, especially since the price of copper has gone up.
Putting it together is a bit labor intensive.
But it can be maintained for free once there is no leak.
It is completely green, and the use usually goes to the cold of wast.
Our work was good and sometimes it was too cold and we had to open the window.
Other times I have to put it on the bypass when I need water but don\'t need to cool.
I have to admit, though, that I did buy an air conditioner.
It\'s on the other end of the house and I\'ll run it when the humidity gets very high.
It is mainly for dehumidifying.
Most of the cooling is done by the water cooler.
Due to the number of comments, I think it would be better to add an additional page to address some of these questions and answer some and clarify some things.
About using car radiator-
While it seems like a good idea at first, I won\'t recommend it for many reasons, for some of the following reasons: first-
You will find it difficult to connect the water pipes in a way that keeps pressure.
You need to find the adapter, from the hose in the radiator size to the normal water pipe.
Although it may be possible to do so, it is likely that there will eventually be a leak. Second -
High water pressure can cause leakage.
The car cooling system is designed for a relatively low PSI.
If I remember correctly, the radiator cover was designed to open and ventilate around 12 to 15 PSI.
Your normal House is supplied with water between 30 and 70 PSI.
My pump will cycle between 30 and 50 PSI (30 on, 50 off).
This pressure is likely to cause the radiator to break or cause the lid to open and ventilate.
So, when you move the sprinkler outside, you turn off the water and there is a fountain in the living room. Not so fun.
So I used the standard pipe.
They are specially designed to withstand higher pressure. Third -
A lot of old radiator leaks started.
In order for them to continue to use, many people have been blocked by stopping the leak.
But once you start running a large amount of fresh water through them, all stop leaks and various other crud will be flushed out and may eventually leak.
Your fountain is starting again. Fourth -
The radiator is hard to clean.
Most of them are filled with bugs leftovers, oil and a variety of other things in the engine compartment.
Even if you clean them up, they may continue to smell bad. Fifth -
The ability to use external water in a normal way, I mean you can turn off the water on the hose and run the sprinkler without worrying about the fountain in the living room, or even wash the car, this is something you may not be able to achieve using a radiator.
With my cooler there is no need for the hose to drain on the ground as it can be pressurized-
It\'s not just a drain.
Also, since it is made to keep the water pressure from leaking, you can find the cooler anywhere in your home that needs cooling.
Actually I thought about building a unit to install the heat pipe and use the stove fan to drive the air through it so that it becomes a whole unit, but I think it\'s too complicated for my needs.
Keep it simple and reduce your problems.
If you are planning to use this in a garage or in a store, I can see the use of a radiator.
Spilled Water won\'t be a problem in your house, but I don\'t recommend using radiators in your househouse use. Next -
If you install one on the window and then pull the air from the outside, you lose part of the cooling effect.
The air outside is much warmer, and there is more heat inside than inside.
By setting it completely inside and circulating the air inside through it, you will get more cooling because the air through it is already softer.
Use external air only when you need ventilation. {{{
For some enterprising companies, it\'s great to make a specific unit for this purpose.
Heat exchanger/radiator designed for standard water pressure, built in plastic housing for catching condensate, fan mounting inside.
All of a unit
Just connect the hose and insert the fan.
But because the market is not big enough, it is impossible for someone to do so.
Still, of course, some Chinese companies may push it to the market in the future and completely deprive me of any share of profits.
I did a Google search on the Internet with baseboard heating tubes and even some heating tubes for salvage prices.
Someone in Texas has 200 feet and he just took it out and didn\'t want to throw it away because it\'s like a new shape.
I used about 40 feet of the tubes for my cooler.
So this is about the amount you need to make a similar unit.
The water I used was taken directly from my pressure tank.
Untreated for outdoor watering.
The groundwater here is very dirty.
It\'s very alkaline. There\'s a lot of rust in it.
To be able to use it in the house, I run it through the sediment filter, then the rust filter, and finally the water softener using the rust-removing salt.
Still, we don\'t drink it.
So the water inside is completely separate from the water outside.
I want to stress. ---
I wasted not just pouring water on the ground.
Used to water gardens, grass and trees.
It hasn\'t rained here for 8 weeks.
Temperature over 80 years old, if not watered, everything will die.
The water will not be wasted.
As a fire prevention measure, I tried to keep a green belt around the house.
On 1999, we had a grass fire/fire storm sweep in the area and 3 neighbors houses were burned down along with 4 buildings/garages and UPS transport warehouses.
Only the leafy houses around were spared.
So it\'s a good idea to bring a green belt.
So again, I stress that I will water anyway, and I\'m just taking advantage of what\'s usually thrown away. (
Cooling performance of water).
Also, a lot of water is not needed for work.
Even when the trickle, there is still a lot of heat absorbed by the water.
\"Bricko\" describes this as \"water source heat pump for poor people \".
He is right.
The normal heat pump does not work here because the temperature is too low in winter, up to 40 degrees Celsius at a time and below 10 weeks at a time.
As a result, they developed a so-called soil source heat pump that uses ground heating and cooling at the medium temperatures required by the heat pump.
My cooler is actually only half a system because it is not for heating but only for cooling.
A complete soil source heat pump system is very expensive and uses a lot of power throughout the year.
In addition, the laws on them have changed recently.
In Montana, you are no longer allowed to put water back underground with a well.
Too many people send dirty water back to the well to pollute the groundwater level.
Therefore, any new heat pump system must be accommodated or sealed.
You can run the fluid through an underground heat exchanger, but the internal fluid is not in direct contact with the groundwater, so this is a sealed circulation system.
I avoided all of this by simply using water to water the plants and cool down the house.
It is not complicated, there is no compressor, there is no thermostat, it is adjusted manually, which makes it cheap and green.
This is also in line with the overall concept of green competition.
Yes, there are more complex systems.
But at least as far as I know this is not the purpose of the game. (
I was thinking about it about before I saw the result of the game)
I do have a plan for wind/compressed air/water pump and would love to adapt to this system and make a completely separate system.
But I never had enough money to develop it, and I didn\'t have enough money to build it. Maybe someday----.
Finally, for those who make the request, I put the coldest water through the outermost layer, so that the air that leaves will hit the coldest water when it leaves.
The temperature drop between incoming and outgoing water depends on the flow rate.
Fully open, the water temperature dropped only a few degrees.
However, only one sprinkler is running, so the flow rate is reduced and the temperature difference can reach 15 degrees.
The inlet hose is wet by condensation, but the output hose is completely dry.
Interestingly, the fan speed does not seem to have much effect on the difference in the water temperature, but it does have an effect on the air temperature.
The lower the fan speed, the colder the air coming out of the cooler.
This is because the air moves longer on the fins and has the opportunity to release more heat.
However, since there is not much air flow and there is not so much circulation of cold air, I usually run the fan in high or medium.
Also, if anyone would like to know or be interested, my well depth is about 70 feet M, there is a submersible pump at the bottom and a pitiless connector below 10 feet m at the bottom.
Since our ground can sometimes freeze to 8 feet, all underground pipes need to be at least that deep, if not deeper, to prevent freezing.
So this is a sealed well, the top of the casing is closed in order to prevent any contamination from entering.
Our water level has dropped by about 20 feet so the pump is far below the water level.
This allows it to reduce a lot before it starts to breathe in air.
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