I've had a couple coolers with Peltier heat exchangers. Both would change the interior temp by about 15 degrees plus or minus from ambient temperature. I think there is good potential here. Remember, Thomas Edison did not go into a laboratory one night with a couple of mushroom pizzas and a keg of ale and come out in the morning with a light bulb. Efficiency ratings should always be coupled with the phrase "compared to what?". Don't give up.
@oldgandy5355 I hear ya, I wish those coolers could do at least 25 degrees. Looking for a broken one to "upgrade" if I can. You understand exactly what this work is all about :) I really admire Edison! Thanks for the kind words of encouragement. Still chipping away at the project. Testing a different peltier chip right now, different water cooler etc. some setups work better than others and it just takes time to figure this stuff out. If I can scrap together something better, I will share the results
spray foam insulation around your set up instead of towels? quick, cheap, easy and you can go thick then trim back until you find a sweet spot of optimal thermal effectiveness. just a thought. oh... what about using a 48V DC system instead of 12V. resistance is heat.
@keayrhyasen1154 Good idea on the foam... yesterday I made a foam jacket with scraps, it looks much better than "a towel" :) I am experimenting with 48v, will share anything interesting
If you water jacket both sides of the peltier and include an integrated cold feed into the input line by placing a cold line next to your input for the hot side you can double your cooling. I feel a standard dorm fridge would better serve your needs with a battery and inverter as refridgerate based systems are better at removing more heat then peliters can by better utilizing your available wattage. Just putting it on a 10 minute cycle timer can littery operate 24hrs a day and extend and charge a battery on solar.
@egn83b Thanks for the ideas... I'm looking for such a fridge, but may have to use a cooler if I can't find one. What's amazing to me is the entire air volume inside of the freezer was 27 degrees... I learned a lot with this prototype and will be trying to build something larger as soon as possible.
After chasing my tail about this topic forever, I've switched my efforts to eliminating the need for refrigeration at all. I've decided to waterbath can, and pressure can all the meat I have in 5 freezers. Canned, it will stay shelf stable with no need for refrigeration and stay fresh and edible for several years. Problem solved. Now I can concentrate on my really important projects, like building a flying saucer.😂
@WhatDadIsUpTo Ah canning, the age old solution that never went away - because it still works and it's grid-down apocalypse approved. Flying saucer project seems legit
If only these things had better efficiency, around 60w of electrical energy gives about 9w of cooling 'power' and the rest in waste heat, making them a bit poor unless your 60w is free. From solar it's free but then only good in bright sunlight or you have to spend on larger panels and hefty batteries. A motor driven compressor cooler knocks these out of the ballpark, but I fully accept that these can provide a niche solution.
@lezbriddon I've found Peltier efficiency varies in practice, by quite a lot. I am working on that. It takes time to sort through all the variables. My interest is in compact refrigeration with no compressor or refrigerant, and I think it's in here somewhere...
@@solarpoweredge yes there's times when compression just won't work due to vibration, noise, motor start up current, varying environmental issues, but I think NASA have some costly versions that can hit higher efficiencies, around 17 to 20%. Kind of odd that this efficiency figure is very similar to the figure for solar.
I watched another video here on TH-cam where the guy performs an experiment to find out the efficiency of Peltier devices since a lot of people will comment that they are only 3% efficient, he ran his test at 12V which is not the most efficient voltage to run them at and he measured an efficiency of 23% which I know that he could have got a better result at a lower voltage, this makes Peltier devices, in my opinion more efficient than solar panels! And yet, some of us are running our whole house on solar panels... Sure you need batteries and you might also need some thermal mass inside the freezer to stabilise the temperature everytime you put something warm into it but as we know that we can run a house on inefficient solar panels, we should be able to use Peltier devices to great effect! Even as a generator, one Peltier device can output 2.1W of power, if you compare a the power output of a solar panel and make a Peltier panel of the same size, you will produce more power from the Peltier panel! They are more sensitive than most people realise, shine a good flashlight at one and it will generate a voltage, I believe that infrared motion detection is essentially a Peltier device will a lense in front of it! It will produce a voltage to trigger the alarm! You learn something new every day....
@PeterMilanovski Good information! Early testing shows an efficiency well exceeding the usual 3-5% claim. There are a lot of problems to overcome in building a freezer. Who knows, maybe in the future we will have solid state freezers and air conditioners, I keep an open mind :)
@@solarpoweredge The spec sheets for the cooler should tell you how many watts they are rated for transferring the heat from one side to the other. For these small devices, a small well insulated "cold side" and adequate heat removal from the hot side should work.
try using 12703 3 amps version, i watch some videos comparing 12703, 12706 and 12712 efficiency and the 12703 version more efficient and produce less heat so on cold side will be colder. well it might be more expensive than 12706 because rarely people or manufacturers using 3A version (perhaps). don't forget adjusting and testing on different voltages or using constant current psu because it affect performance and heat that peltier / thermoelectric produces.
@KazemitoHaruhi Hello and thanks for the ideas. I will look for 03 modules asap. Currently testing different manufacturers too. Different voltages, current etc. is in progress!
@thedustmancometh Yes very "cool" stuff... I'm not sure how to gauge the heat output, but I can tell you the water temp is a few degrees warmer than the air, and I can not really feel warmth in the air after the fan has been running a while. If I turn the fan off a while and let the water heat up, I get a blast of warm air as it dumps all the heat - I find it really fascinating
I have actually achieved -5c with a high quality peltier that is well cooled with just 5v at 2A which is within USB specifications!! I personally want to try making a USB powered freezer in the future because that is definitely something that has never really been done before. There are some USB fridges but all those videos I've seen are products that have little to no insulation or DIY projects that are horribly inefficient with their designs
Oh yeah I should mention, there is a HUGE difference with quality peltiers and non quality ones regarding efficiency. Ones that are high quality have evenly distributed temperatures across the cold and hot sides. I've had some peltiers that barely manages to go below freezing and others that go into -15c or more
@aleksandersats9577 Great work, keep on experimenting! A USB mini freezer would be awesome.... Don't know why there is so much negativity against peltiers in general. I think they are a marvel in a small package. To have something suddenly get cold for a few volts and no refrigerant or moving parts is shocking and amazing. I am building some fridges/freezers in my shop with good performance, but tedious and complicated construction. Perhaps it will get better. After months of research, my TE fridge prototypes far outperform the "coolers" currently available on the market :)
@aleksandersats9577 You are right, unfortunately some companies print "whatever they want" on the front, but there is no way to see inside the module. I have bought and tested a ton of modules from all over the world, they vary in performance wildly
@@solarpoweredge There is so many areas where you can improve the efficiency of peltiers. I'll list some that I know: 1. How cold the cold side can get is affected by how cold the hot side is. So optimize cooling to as much as possible by doing several things: - Good quality thermal paste for good thermal conductivity - Fully copper heatsinks as copper transfers heat better - make the exhaust of the hot side away from the case of the insulation as blowing hot air directly on the insulation does not improve it. 2. Thermostat to not waste energy when it has achieved the target temperature. Now this brings it own range of problems: - Turning the peltier off means the heat energy would get back inside through the peltier. This basically leaves a huge hole in the insulation and that needs to be minimized. I have several ideas such as a smaller heatsink on the inside with a fan blowing against it. When the thermostat turns off, the fan would turn off minimizing energy loss from the heat energy coming in. Another way to improve is making sure the temperature is evenly distributed internally. Since there is fan on the inside, adding cold air tunnels to the complete other end of the box from the peltier is would evenly distribute the cold temperature as it creates an air tunnel. 3. Chest type freezers are known to be more efficient as cold air is heavier than hot air, opening the door on a chest type styled fridge/freezer minimizes energy loss when you open the lid to take or put something in 4. Thicker/better insulation. Thicker insulation helps a lot to retain the cold energy, so the thicker the better. Good door sealing gaskets would help a lot as well. 5. Water cooling is great, however it produces numerous other issues. - You need to run a pump and you are dealing with water. - Mixing different metals with water is a bad idea and will cause corrosion. - Running the pump 24/7 can wear it down or eventually even get stuck which will be really bad especially if there are no safety precautions in place. Imagine the the pump fails and you send 60w to the peltier. Suddenly it's not being cooled well enough and it may get hot enough to start a fire!!! I hope you find these very helpful!
@aleksandersats9577 Well done! Thanks for all the ideas. Btw I'm building and testing a couple of small chest fridge/freezers possibly with some "special features". If they work well enough, I will share the results. PS an alternative to turning OFF the peltiers, is leave them running but throttled down significantly... kind of like "virtual insulation!"
@cynthiamathieu5862 In common cheap appliances (like those large coolers or mini drink coolers) they are known for failing after a few years or less ... however I think some of that is due to the way they're used in the design. Also, they use cheap import modules. I can't say how many years they will last if "properly used" but I guess I will find out. I am also testing different brands of modules to see if there are any benefits
You need to look into NASA space videos regarding the Pioneer space probes which, don't quote me were launched in the 70's and used nuclear decay to provide the heat for the Peltier devices, they are still working today albeit at a reduced power output due to the nuclear heat source no longer putting out the heat it once did! So in terms of longevity, as a generator, they have a long track record.... But as a cooling device, I have yet to come across a mention of a product that has been working for an extended period of time! The humble heat pump on the other hand, even though it has moving parts, I came across a video of a story about a fridge from the 20's that was finally traded in after being handed down through the generations! I can say with certainty that I was impressed by the reliability of the heat pump especially when it's made well! I'm not sure if it had been re gassed over it's lifetime? There was no mention of it! My personal fridge has been in my possession since new for possibly more than 25 years and not showing any signs of giving up any time soon! Knock on wood! I think that it's way too early to tell how reliable Peltier devices will be at this stage, I believe that they are misunderstood by many people, I constantly see them being run at 12v and more in some cases, they can run at lower voltage and judging by what I have seen so far, they can operate far more efficient! I think that the trick is to run more at a reduced voltage to achieve the same outcome and they should last a lifetime if not more!
@PeterMilanovski I noticed peltiers all look about the same, but vary wildly in real world performance. Experimenting with various quality (and non quality) modules to see what works. Good ideas and good thinking. I suspect under-volting them could improve reliability in addition to efficiency.
@cynthiamathieu5862 I think that is the case, and unfortunately they all look about the same. I paid extra for one batch of peltiers to test, and their performance was quite poor! And nowhere near the claimed specifications. But I kind of expected that... very common in the current market.
I had a 12 volt non compressor that when the temperature outside was below 80 degrees it would if you set it too cold freeze things in it so I know it can be done maybe with a bigger cooling unit and or better insulation after all most are lucky to have R 5 so maybe at least R 10 or higher also a chest type so when you open the door all the cold does not come out
lol, i still have a collection of bulged heat blocks from hitting minus 40... i found freezing wasnt the issue. building it neatly so it wasnt a tangle of hoses was... iunno, no matter how well i plan, everything ends up a sh1tfight...
@paradiselost9946 Is that what happens when those blocks freeze.... That's pretty funny, yeah I hate hoses and wires. But it's clearly labeled "prototype" and "research". Many of my projects tend to look messy, due to the situation here it's all I can do to keep going, let alone make it look nice. Maybe by prototype version 7 it will look nicer :)
ethylene glycol or some other liquid cooled pc fluid would work better to transfer heat away vs water , and you could prob find a old small non working fridge for free and use the fins etc as test bed
@@solarpoweredge I've seen car radiators and condenser coils on facebook marketplace for pretty cheap. Heater cores are another option. Those are pretty cheap new, but searching at autoparts stores can be difficult. Another option is to just dump the heat into a 15 or 55 gallon barrel of water.
@orangezeroalpha Just looked up car heater cores, those are great! Earlier I bought some transmission oil coolers that may work. Not quite what I had in mind however they ought to do the trick and if not they will get used elsewhere
@@solarpoweredge someone near me has a new honda accord radiator and coil for $20, both are around 12in x 24in and over $100 new. But I already have two disassembled air conditioners and ordered ten 12715 peltiers and I am trying to be reasonable :) I do remember my heater core would actually keep my pc running for a long time even without a fan, but it was likely only dissipating 100w or so. I still think a huge tank of water with a pump would be nice just for the noise reduction.
What about a water heater cooler application two adjacent insulated containers filled with peltier in between, heating one side cooling the other, no pumps only thermostats to prevent freeze up or overheating, would be nice for a job site to have cold drinking water and warm water for coffee or hand washing?
This is the kind of applied electronics I'm looking for! Subscribed.
@StingerSecSol Hi, glad to hear it - thanks for subscribing :)
Woohoo! I was waiting for this video since you first announced it a few days ago. Big thanks!! So interesting and informative. Keep up the great work.
@Victoria-gq8gt Thank you :D I appreciate your kind feedback.... hope to go into more detail about this stuff later, I find them extremely fascinating
Very nice thankyou for posting your update❤
@ShafaqIftikhar-pw9ld You are very welcome :) :D
Ok, now that's pretty awesome! I never thought about peltiers being able to be used for freezing temps. Congratulations on a successful test!
@colin8532 Thank you, maybe I can build a bigger one and put some food in it, guess we'll see :D
I've had a couple coolers with Peltier heat exchangers. Both would change the interior temp by about 15 degrees plus or minus from ambient temperature. I think there is good potential here. Remember, Thomas Edison did not go into a laboratory one night with a couple of mushroom pizzas and a keg of ale and come out in the morning with a light bulb. Efficiency ratings should always be coupled with the phrase "compared to what?". Don't give up.
@oldgandy5355 I hear ya, I wish those coolers could do at least 25 degrees. Looking for a broken one to "upgrade" if I can.
You understand exactly what this work is all about :) I really admire Edison! Thanks for the kind words of encouragement. Still chipping away at the project. Testing a different peltier chip right now, different water cooler etc. some setups work better than others and it just takes time to figure this stuff out. If I can scrap together something better, I will share the results
@@solarpoweredge Looking forward to it.
spray foam insulation around your set up instead of towels? quick, cheap, easy and you can go thick then trim back until you find a sweet spot of optimal thermal effectiveness. just a thought.
oh... what about using a 48V DC system instead of 12V. resistance is heat.
@keayrhyasen1154 Good idea on the foam... yesterday I made a foam jacket with scraps, it looks much better than "a towel" :) I am experimenting with 48v, will share anything interesting
Great test! Thanks for sharing.
@jwdory Welcome :) :D
If you water jacket both sides of the peltier and include an integrated cold feed into the input line by placing a cold line next to your input for the hot side you can double your cooling. I feel a standard dorm fridge would better serve your needs with a battery and inverter as refridgerate based systems are better at removing more heat then peliters can by better utilizing your available wattage. Just putting it on a 10 minute cycle timer can littery operate 24hrs a day and extend and charge a battery on solar.
@egn83b Thanks for the ideas... I'm looking for such a fridge, but may have to use a cooler if I can't find one. What's amazing to me is the entire air volume inside of the freezer was 27 degrees... I learned a lot with this prototype and will be trying to build something larger as soon as possible.
You are doing great work on stuff I've been interested in trying. Thanks for sharing bro!
@user-ib9gk4xw5m Welcome, hope you have some time to experiment! I think these peltiers are amazing pieces of kit
After chasing my tail about this topic forever, I've switched my efforts to eliminating the need for refrigeration at all.
I've decided to waterbath can, and pressure can all the meat I have in 5 freezers.
Canned, it will stay shelf stable with no need for refrigeration and stay fresh and edible for several years.
Problem solved.
Now I can concentrate on my really important projects, like building a flying saucer.😂
@WhatDadIsUpTo Ah canning, the age old solution that never went away - because it still works and it's grid-down apocalypse approved. Flying saucer project seems legit
Very impression ! But it still need moving the water for heat exchange , so that let's use ram pump !
@longanghoai9881 I want to build a ram pump, if I can find a proper water source :)
I find a Yeti is amazing on how I can have a cold drink in a hot car. Imagine if you could combine a way the yeti is made with your peltier freezer.
@skid4482 Yes good idea... I hope to build a bigger freezer after finishing all the tests, cold drink sounds good :) 👍
@@solarpoweredge Awesome! Keep up the great work. :)
@skid4482 Thank you :D
If only these things had better efficiency, around 60w of electrical energy gives about 9w of cooling 'power' and the rest in waste heat, making them a bit poor unless your 60w is free. From solar it's free but then only good in bright sunlight or you have to spend on larger panels and hefty batteries.
A motor driven compressor cooler knocks these out of the ballpark, but I fully accept that these can provide a niche solution.
@lezbriddon I've found Peltier efficiency varies in practice, by quite a lot. I am working on that. It takes time to sort through all the variables. My interest is in compact refrigeration with no compressor or refrigerant, and I think it's in here somewhere...
@@solarpoweredge yes there's times when compression just won't work due to vibration, noise, motor start up current, varying environmental issues, but I think NASA have some costly versions that can hit higher efficiencies, around 17 to 20%.
Kind of odd that this efficiency figure is very similar to the figure for solar.
I watched another video here on TH-cam where the guy performs an experiment to find out the efficiency of Peltier devices since a lot of people will comment that they are only 3% efficient, he ran his test at 12V which is not the most efficient voltage to run them at and he measured an efficiency of 23% which I know that he could have got a better result at a lower voltage, this makes Peltier devices, in my opinion more efficient than solar panels! And yet, some of us are running our whole house on solar panels... Sure you need batteries and you might also need some thermal mass inside the freezer to stabilise the temperature everytime you put something warm into it but as we know that we can run a house on inefficient solar panels, we should be able to use Peltier devices to great effect!
Even as a generator, one Peltier device can output 2.1W of power, if you compare a the power output of a solar panel and make a Peltier panel of the same size, you will produce more power from the Peltier panel! They are more sensitive than most people realise, shine a good flashlight at one and it will generate a voltage, I believe that infrared motion detection is essentially a Peltier device will a lense in front of it! It will produce a voltage to trigger the alarm!
You learn something new every day....
@PeterMilanovski Good information! Early testing shows an efficiency well exceeding the usual 3-5% claim. There are a lot of problems to overcome in building a freezer. Who knows, maybe in the future we will have solid state freezers and air conditioners, I keep an open mind :)
@@solarpoweredge The spec sheets for the cooler should tell you how many watts they are rated for transferring the heat from one side to the other. For these small devices, a small well insulated "cold side" and adequate heat removal from the hot side should work.
try using 12703 3 amps version, i watch some videos comparing 12703, 12706 and 12712 efficiency and the 12703 version more efficient and produce less heat so on cold side will be colder.
well it might be more expensive than 12706 because rarely people or manufacturers using 3A version (perhaps).
don't forget adjusting and testing on different voltages or using constant current psu because it affect performance and heat that peltier / thermoelectric produces.
@KazemitoHaruhi Hello and thanks for the ideas. I will look for 03 modules asap. Currently testing different manufacturers too. Different voltages, current etc. is in progress!
Looking forward to seeing those videos...
@PeterMilanovski great, hoping to finish at least a couple more peltier videos as soon as possible
That’s very cool, literally- I’m also curious as to the heat output from the little heater core/radiator. you know- just because.
@thedustmancometh Yes very "cool" stuff... I'm not sure how to gauge the heat output, but I can tell you the water temp is a few degrees warmer than the air, and I can not really feel warmth in the air after the fan has been running a while. If I turn the fan off a while and let the water heat up, I get a blast of warm air as it dumps all the heat - I find it really fascinating
I have actually achieved -5c with a high quality peltier that is well cooled with just 5v at 2A which is within USB specifications!! I personally want to try making a USB powered freezer in the future because that is definitely something that has never really been done before. There are some USB fridges but all those videos I've seen are products that have little to no insulation or DIY projects that are horribly inefficient with their designs
Oh yeah I should mention, there is a HUGE difference with quality peltiers and non quality ones regarding efficiency. Ones that are high quality have evenly distributed temperatures across the cold and hot sides. I've had some peltiers that barely manages to go below freezing and others that go into -15c or more
@aleksandersats9577 Great work, keep on experimenting! A USB mini freezer would be awesome.... Don't know why there is so much negativity against peltiers in general. I think they are a marvel in a small package. To have something suddenly get cold for a few volts and no refrigerant or moving parts is shocking and amazing.
I am building some fridges/freezers in my shop with good performance, but tedious and complicated construction. Perhaps it will get better. After months of research, my TE fridge prototypes far outperform the "coolers" currently available on the market :)
@aleksandersats9577 You are right, unfortunately some companies print "whatever they want" on the front, but there is no way to see inside the module. I have bought and tested a ton of modules from all over the world, they vary in performance wildly
@@solarpoweredge There is so many areas where you can improve the efficiency of peltiers. I'll list some that I know:
1. How cold the cold side can get is affected by how cold the hot side is. So optimize cooling to as much as possible by doing several things:
- Good quality thermal paste for good thermal conductivity
- Fully copper heatsinks as copper transfers heat better
- make the exhaust of the hot side away from the case of the insulation as blowing hot air directly on the insulation does not improve it.
2. Thermostat to not waste energy when it has achieved the target temperature. Now this brings it own range of problems:
- Turning the peltier off means the heat energy would get back inside through the peltier. This basically leaves a huge hole in the insulation and that needs to be minimized. I have several ideas such as a smaller heatsink on the inside with a fan blowing against it. When the thermostat turns off, the fan would turn off minimizing energy loss from the heat energy coming in. Another way to improve is making sure the temperature is evenly distributed internally. Since there is fan on the inside, adding cold air tunnels to the complete other end of the box from the peltier is would evenly distribute the cold temperature as it creates an air tunnel.
3. Chest type freezers are known to be more efficient as cold air is heavier than hot air, opening the door on a chest type styled fridge/freezer minimizes energy loss when you open the lid to take or put something in
4. Thicker/better insulation. Thicker insulation helps a lot to retain the cold energy, so the thicker the better. Good door sealing gaskets would help a lot as well.
5. Water cooling is great, however it produces numerous other issues.
- You need to run a pump and you are dealing with water.
- Mixing different metals with water is a bad idea and will cause corrosion.
- Running the pump 24/7 can wear it down or eventually even get stuck which will be really bad especially if there are no safety precautions in place. Imagine the the pump fails and you send 60w to the peltier. Suddenly it's not being cooled well enough and it may get hot enough to start a fire!!!
I hope you find these very helpful!
@aleksandersats9577 Well done! Thanks for all the ideas.
Btw I'm building and testing a couple of small chest fridge/freezers possibly with some "special features". If they work well enough, I will share the results.
PS an alternative to turning OFF the peltiers, is leave them running but throttled down significantly... kind of like "virtual insulation!"
My concern about peltiers is their longevity. Do they hold up with heavy use over years?
@cynthiamathieu5862 In common cheap appliances (like those large coolers or mini drink coolers) they are known for failing after a few years or less ... however I think some of that is due to the way they're used in the design. Also, they use cheap import modules. I can't say how many years they will last if "properly used" but I guess I will find out. I am also testing different brands of modules to see if there are any benefits
@@solarpoweredge my shallow understanding is there that the mtbf varies a lot between brands.
You need to look into NASA space videos regarding the Pioneer space probes which, don't quote me were launched in the 70's and used nuclear decay to provide the heat for the Peltier devices, they are still working today albeit at a reduced power output due to the nuclear heat source no longer putting out the heat it once did!
So in terms of longevity, as a generator, they have a long track record.... But as a cooling device, I have yet to come across a mention of a product that has been working for an extended period of time! The humble heat pump on the other hand, even though it has moving parts, I came across a video of a story about a fridge from the 20's that was finally traded in after being handed down through the generations! I can say with certainty that I was impressed by the reliability of the heat pump especially when it's made well! I'm not sure if it had been re gassed over it's lifetime? There was no mention of it! My personal fridge has been in my possession since new for possibly more than 25 years and not showing any signs of giving up any time soon! Knock on wood!
I think that it's way too early to tell how reliable Peltier devices will be at this stage, I believe that they are misunderstood by many people, I constantly see them being run at 12v and more in some cases, they can run at lower voltage and judging by what I have seen so far, they can operate far more efficient! I think that the trick is to run more at a reduced voltage to achieve the same outcome and they should last a lifetime if not more!
@PeterMilanovski I noticed peltiers all look about the same, but vary wildly in real world performance. Experimenting with various quality (and non quality) modules to see what works. Good ideas and good thinking. I suspect under-volting them could improve reliability in addition to efficiency.
@cynthiamathieu5862 I think that is the case, and unfortunately they all look about the same. I paid extra for one batch of peltiers to test, and their performance was quite poor! And nowhere near the claimed specifications. But I kind of expected that... very common in the current market.
I had a 12 volt non compressor that when the temperature outside was below 80 degrees it would if you set it too cold freeze things in it so I know it can be done maybe with a bigger cooling unit and or better insulation after all most are lucky to have R 5 so maybe at least R 10 or higher also a chest type so when you open the door all the cold does not come out
@douglaswindsor120 Early tests of a chest style peltier fridge are in progress, it is working quite well. I have to find some better insulation
lol, i still have a collection of bulged heat blocks from hitting minus 40... i found freezing wasnt the issue. building it neatly so it wasnt a tangle of hoses was... iunno, no matter how well i plan, everything ends up a sh1tfight...
@paradiselost9946 Is that what happens when those blocks freeze.... That's pretty funny, yeah I hate hoses and wires. But it's clearly labeled "prototype" and "research". Many of my projects tend to look messy, due to the situation here it's all I can do to keep going, let alone make it look nice. Maybe by prototype version 7 it will look nicer :)
ethylene glycol or some other liquid cooled pc fluid would work better to transfer heat away vs water , and you could prob find a old small non working fridge for free and use the fins etc as test bed
@rkeantube Good idea... been looking for a broken mini fridge
@@solarpoweredge I've seen car radiators and condenser coils on facebook marketplace for pretty cheap. Heater cores are another option. Those are pretty cheap new, but searching at autoparts stores can be difficult. Another option is to just dump the heat into a 15 or 55 gallon barrel of water.
@orangezeroalpha Just looked up car heater cores, those are great! Earlier I bought some transmission oil coolers that may work. Not quite what I had in mind however they ought to do the trick and if not they will get used elsewhere
@@solarpoweredge someone near me has a new honda accord radiator and coil for $20, both are around 12in x 24in and over $100 new. But I already have two disassembled air conditioners and ordered ten 12715 peltiers and I am trying to be reasonable :) I do remember my heater core would actually keep my pc running for a long time even without a fan, but it was likely only dissipating 100w or so. I still think a huge tank of water with a pump would be nice just for the noise reduction.
❤❤❤❤❤s
:D :) 👍
What about a water heater cooler application two adjacent insulated containers filled with peltier in between, heating one side cooling the other, no pumps only thermostats to prevent freeze up or overheating, would be nice for a job site to have cold drinking water and warm water for coffee or hand washing?
@travishodges5179 I like these ideas, taking notes of them... I have 1000 projects going but it's on the list!