Hey no apologies needed, there is no point in just watching someone turn on their system, I'm here to learn more how it works so i greatly appreciate your "ramblings" which you could hardly call that. Thank you for your EXPLANATIONS, great video sir!
Thank you. It is simple and easy to understand video. It helps me understand the refrigeration fundamentals which so long I want to know and now I do. Again, thank you very much Peter.
Hey man, your video helped me to understand refrigeration better. It was a worthwhile video and I appreciate the work you did to educate some of us who have a general understanding, but you just gave us an overview synopsis of an entire course. Good job!
Thank you much. It really is a fascinating subject, and I wish more people pursued it as a hobby. I hope that my videos encourage others to do just that.
Dude no idea how you don't have millions upon millions of subscribers. I think it's probably because the large manufacturers don't want your info getting out. This is great stuff man.
Awesome video, couple of questions. What did you use for the expansion valve? Also that's quite the evap coil, what was the idea behind that? 4 bottles of beer?
Hey I searched refridgerator from scratch because I'm trying to get a scholarship and it's fixing a problem and I picked refridgerator. Anyways I think you are super smart. Like I'm smart and my dad is hella smart but you might be above his level. I just wanted to say your explanation was great and all around you seem like a great intelligent guy. I have literally never left a comment before so that shows you how much I liked this video
Good videos. I started with your tiny DC compressor videos. I'm going to start working with one this week. I'm going to use it to cool the hot side of a TE Cooler for cooling an IR detector down to -70degC. I am not an expert in refrigeration but I think I can make a tiny compressor work. Thanks for taking the time to make these videos.
I bought the compressor from Aspen $500. (American made so it's a bit more than the Chinese version) and a small condenser that matches that tiny compressor. I am working on designing a small expansion evaporator (copper) that I need to get as absolutely as cold as possible (-20C or better). I'm going to use the freon setup to cool the hot side of 4each, TE Coolers, which, in turn, cool a 4-stage TE Cooler. without the freon setup, I am able to get the 4-stage down to -80C (in a dewar vacuum chamber that I designed using a high vacuum turbopump, pumps down into the E-10-8 torr range). I need to get the 4-stage down to -83C or better to cool an IR Detector. I wish I could pick your brain as I proceed, but I think it is more than possible to do this. Thanks for the fast reply!
Paul Zacharias Is the IR detector mounted right on the cold side of the 4 stage TEC? What is the mounting style? I have a few thoughts on a two phase thermosiphon evaporator, might work well in a VC system.
Yes, on the top side of the 4-satge. right now, for experimental purposes, I use only thermal paste and I tack a thin copper plate to the TEC top using dots of thermal epoxy (so I can remove if needed). I have a type K thermocouple sensing the copper plate and a normal resistor to simulate a 300milliwatt load. Using a Stirling cooler easily goes down to 40deg K, is the way this is normally done. My company (the one I work for) wants to compete in a certain arena and doesn't want to spend the $6k+ on a Stirling Cooler.
Are we related? That was so much better than the class I took at VT tech. One thing, you began by describing just the propane system excluding the water system. Looking forward to your next lesson. Kudos.
I would have watched another 40 min.!Love the sugar skull ! Have a question.Which would be most efficient at cooling in a homemade setup like that,a AC window unit compressor,a fridge comp.,or a car comp hooked to an elect. motor?I'm wanting to make a rig to cool the garage "for the hell of it",lol.No furnace so don't need a central unit(or would it be better using a central and rigging an A-coil and blower).I would be using finned coils instead of water also.Thanks for sharing your knowledge!
I'd be more concerned about the size of the compressor needed. The efficiency is a concern, but pretty minor ; it's more important to build a quality system first and worry about upgrading the compressor later. It depends on the size of the space, how well it is insulated, and the heat load. As long as it isn't a huge, uninsulated space, I would start with a 1 ton or 12,000 but/hr window unit. If you are looking to play, you could get a window unit, and split it with the condenser and compressor outside, and the evaporator and a fan indoors. Run some copper lines in between, insulating the the suction. An A-coil might be a little large for this application, unless you can get one small enough for the compressor you are using. Have to consider how much air you are pushing across that coil too. If it is too little, the coil freezes up, too much and you don't remove much humidity. Sounds like a fun project! Looking forward to hearing more!
Hi, I'm working on a small school project trying to build a refrigerator but I'm not sure how to go about choosing the right expansion valve, can you give any advice please.
I wish I could find a video this thorough for a propane powered rv type refrigerator that does not use a compressor or electricity. Specifically how does the system keep the liquid moving circularity. What keeps it moving in one direction?
A very astute observer to be using propane as a refrigerant. How many bottles did you burn through before the nagging inspiration nailed you to the wall? What is the flash point of propane? I hope the setup is in a shed and not an attached garage.
When companies make units they don't necessarily make the most efficient model they can. They make the models that can be mass produced and cheap enough to buy.
Advice: swap out the aluminum tape for Duct tape on the outside of the installation because it's transferring air temps into your into your installation- conduction. Duct tape won't transfer Nearly as much.
Thanks for sharing your setup. I really like what you did. -Propane looks like a nice refrigerant, except that it's flammable. Were you worried about that?
He had to evacuate all of the oxygen and co2 completely out of the system first. So there is really no danger in it being flammable unless he punctured it and then quickly put a flame up to the puncture.
Many of the principles apply, but propane couldn't get to those crazy low temperatures. Check out Applied Science Channel. He has liquified nitrogen. The industrial process is done differently. ua-cam.com/video/7PWESWqhD8s/v-deo.html
Matthew Mckinney it's reasonably safe. Many commercial upright freezers use r290 now. Isobutane (r600a) has been used in residential refrigerators in Europe for 2 decades. Increasingly common in the US.
No, it’s not! Shaun Dobbie made a few, and there are some other less known UA-camrs who have. For example, M4J5TER made a 3-stage cryogenic refrigeration system with which he was able to get liquid nitrogen. He also made his own ethylene for the second stage with catalytic conversion from ethanol over alumina, and refined it afterwards for use as a refrigerant.
Samual Whittemore That was the whole point of the thing. It has a large enough accumulator to allow for low superheat without flooding the evaporator. Granted, propane refrigerant probably should have a bit more superheat to prevent washing out the bearings or bushings in the compressor. This video was pretty early in my stint into refrigeration. Thanks for the comment!
It's the contained ( better controlled ) distillation of a substance that when separated by process , chills at a lower boiling point . Distillation and condensation of " referigerant " in ... Essentially , a vaccume . Pure ammonia and distilled " pure " water is an exelent refrigerant ... Do some research ... Crosley Icy ball . The whole bit , explains easier with an apparatus which isen't as complex . Shouldent mess with any of it without a thourough understanding . Involves pressures , poisons , structural materials that need to withstand both while being effectively regulated by thermostat & pressure sensor controls .
Very cool man - and no apologies needed, it was interesting. So here is a question. Based on Trompe Hammer technology (which is actually two very old ideas connected in series) - see here: ua-cam.com/video/8wX4WtOHFZE/v-deo.html I was thinking about trying to make a refrigeration system for a "greenhouse" to prolong cool season vegetables. Let us take as a given that I am able to generate 150PSI of pressure, but this is just standard air - not propane - would it be possible to build an effective refrigeration system for a relative large space? I understand you are using propane because its boiling point allows you to more easily move heat from one space to another, but if we were to use regular air - could it be done? How do I do the math to determine what my variance needs to be? I very much appreciate your thoughts. Thanks!
Air refrigeration systems have been around for a very long time, but they usually involved the compression and re-expansion of LARGE volumes of air. The specific heat capacity of air is just not very high. They were competitive for a time in the 19th century, especially on ships where an ammonia leak was quite dangerous. If there is a few kw of power there, then I suppose something could be rigged to provide cooling for a large space.
Refrigeration is so easy to explain its not even funny. Many things use the same principles of refrigeration. For example the water cycle. Water in the ocean evaporates after its absorbed heat from the sun, The water vapor rises loses heat and the temperature drops and it condenses back into liquid and falls down as a liquid in the form of rain. Same with refrigerant. Liquid refrigerant absorbs heat inside the fridge, it evaporates and goes back to the compressor and gets compressed, which makes the refrigerant get hot and the vapor goes into a radiator where it gets cooled down by a fan, whcih is removing heat and that causes the vapor to condense back into a liquid and then it goes through a valve that changes the pressure to a low pressure which allows the liquid refrigerant to be able to absorb heat and repeat the cycle again. Simple.
seriously bro, if you wanna explain how something works in it's simplest form why don't you build a basic refrigeration setup, this is your custom Frankenstein. lol
Thermodynamics, refrigerant chart, pressure analysis, running demonstration, sh.. starts and stops and we get cold beer. Love it! :D
I sat through the whole thing and I may do it again. Very educational, thank you.
Excellent explanation of the refrigeration process, thank you.
1st of all thanks for spending the time to explain this to me. I may be late for for work but they can never take knowledge away from me.
Hey no apologies needed, there is no point in just watching someone turn on their system, I'm here to learn more how it works so i greatly appreciate your "ramblings" which you could hardly call that. Thank you for your EXPLANATIONS, great video sir!
Hey, thank you for the kind words! I just re-watched this video yesterday. I would like to create more content like this in the future.
Thank you. It is simple and easy to understand video. It helps me understand the refrigeration fundamentals which so long I want to know and now I do. Again, thank you very much Peter.
Been trying to get my head around this for years, now it make sense. I want to make my own boat fridge and feeling more confident to have a go.
www.rparts.com/
I absolutely LOVED your explanation!, GREAT job!
Hey man, your video helped me to understand refrigeration better. It was a worthwhile video and I appreciate the work you did to educate some of us who have a general understanding, but you just gave us an overview synopsis of an entire course. Good job!
Thank you much. It really is a fascinating subject, and I wish more people pursued it as a hobby. I hope that my videos encourage others to do just that.
Dude no idea how you don't have millions upon millions of subscribers. I think it's probably because the large manufacturers don't want your info getting out. This is great stuff man.
thank you for the great explanation and taking your time to make this video
thanks for the explanation dr house.
i was just thinking the same thing
I knew that face reminded me of someone...
this is awesome. nice straight forward explanation. someone give this man a cookine.
Best description explanation and cool examples.
Well this is neat! we just rebuilt our fridge aboard our sailboat (that we live on). We would love to hear your thoughts!
Awesome video, couple of questions. What did you use for the expansion valve? Also that's quite the evap coil, what was the idea behind that? 4 bottles of beer?
Great video......I now have a better understanding....Thanks
Where did you get the chart that you showed on your wall? Are there charts like that for other elements too? Thanks!
Very well done.. Love the fact you're using propane as a working gas. You earned those IPA!
Hey I searched refridgerator from scratch because I'm trying to get a scholarship and it's fixing a problem and I picked refridgerator. Anyways I think you are super smart. Like I'm smart and my dad is hella smart but you might be above his level. I just wanted to say your explanation was great and all around you seem like a great intelligent guy. I have literally never left a comment before so that shows you how much I liked this video
Good videos. I started with your tiny DC compressor videos. I'm going to start working with one this week. I'm going to use it to cool the hot side of a TE Cooler for cooling an IR detector down to -70degC. I am not an expert in refrigeration but I think I can make a tiny compressor work. Thanks for taking the time to make these videos.
Neat! Where did you get the compressor, and how much did you pay? I'm actually going to be working with some TECs soon. What type of TEC at you using?
I bought the compressor from Aspen $500. (American made so it's a bit more than the Chinese version) and a small condenser that matches that tiny compressor. I am working on designing a small expansion evaporator (copper) that I need to get as absolutely as cold as possible (-20C or better). I'm going to use the freon setup to cool the hot side of 4each, TE Coolers, which, in turn, cool a 4-stage TE Cooler. without the freon setup, I am able to get the 4-stage down to -80C (in a dewar vacuum chamber that I designed using a high vacuum turbopump, pumps down into the E-10-8 torr range). I need to get the 4-stage down to -83C or better to cool an IR Detector. I wish I could pick your brain as I proceed, but I think it is more than possible to do this. Thanks for the fast reply!
Paul Zacharias Is the IR detector mounted right on the cold side of the 4 stage TEC? What is the mounting style? I have a few thoughts on a two phase thermosiphon evaporator, might work well in a VC system.
Yes, on the top side of the 4-satge. right now, for experimental purposes, I use only thermal paste and I tack a thin copper plate to the TEC top using dots of thermal epoxy (so I can remove if needed). I have a type K thermocouple sensing the copper plate and a normal resistor to simulate a 300milliwatt load. Using a Stirling cooler easily goes down to 40deg K, is the way this is normally done. My company (the one I work for) wants to compete in a certain arena and doesn't want to spend the $6k+ on a Stirling Cooler.
Are we related? That was so much better than the class I took at VT tech. One thing, you began by describing just the propane system excluding the water system. Looking forward to your next lesson. Kudos.
Where do you get your refrigeration components?
Are they recycled? If so, how do you go about removing the refrigerant?
Thanks for the video. What is the difference between the setup for a fridge and the setup for a freezer?
I would have watched another 40 min.!Love the sugar skull ! Have a question.Which would be most efficient at cooling in a homemade setup like that,a AC window unit compressor,a fridge comp.,or a car comp hooked to an elect. motor?I'm wanting to make a rig to cool the garage "for the hell of it",lol.No furnace so don't need a central unit(or would it be better using a central and rigging an A-coil and blower).I would be using finned coils instead of water also.Thanks for sharing your knowledge!
I'd be more concerned about the size of the compressor needed. The efficiency is a concern, but pretty minor ; it's more important to build a quality system first and worry about upgrading the compressor later. It depends on the size of the space, how well it is insulated, and the heat load. As long as it isn't a huge, uninsulated space, I would start with a 1 ton or 12,000 but/hr window unit.
If you are looking to play, you could get a window unit, and split it with the condenser and compressor outside, and the evaporator and a fan indoors. Run some copper lines in between, insulating the the suction. An A-coil might be a little large for this application, unless you can get one small enough for the compressor you are using. Have to consider how much air you are pushing across that coil too. If it is too little, the coil freezes up, too much and you don't remove much humidity.
Sounds like a fun project! Looking forward to hearing more!
Happy to see you are using the best gas(propane). Enviro safe brand or others, no reclaimation needed.
Hi, I'm working on a small school project trying to build a refrigerator but I'm not sure how to go about choosing the right expansion valve, can you give any advice please.
Good video !! Enjoyed it !!
Does your throttle valve in the cold box replace a capillary tube?
That's fantastic! I thought your explanation was thorough and thoughtful, not a ramble. I've never heard of using propane before.
Great video. Thank you.
I wish I could find a video this thorough for a propane powered rv type refrigerator that does not use a compressor or electricity. Specifically how does the system keep the liquid moving circularity. What keeps it moving in one direction?
A very astute observer to be using propane as a refrigerant. How many bottles did you burn through before the nagging inspiration nailed you to the wall? What is the flash point of propane? I hope the setup is in a shed and not an attached garage.
The best of us ramble so your cool :)
Nice! Great explanation
Dude, why are you so self conscious? Lol. Your explanations are great, you look great, your setup is cool.... Dope video, man. Super educational.
Very informative. Thank you
great video, thanks
shucks if that was horse poop, keep it rolling. really cool setup.
Thank you its highly appreciated
Could a similar system be used to freeze a 8x4 box with 2 or 3 inches of water?
nice self made DIY refrigeration system
When companies make units they don't necessarily make the most efficient model they can. They make the models that can be mass produced and cheap enough to buy.
Boss.nice your job
Advice: swap out the aluminum tape for Duct tape on the outside of the installation because it's transferring air temps into your into your installation- conduction. Duct tape won't transfer Nearly as much.
Hi,do ammonia use the same principle?
Do you have a full diagram of this thing?
Thank you
Excellent
I loved watching this from the perspective of a fish!
Thanks for sharing your setup. I really like what you did. -Propane looks like a nice refrigerant, except that it's flammable. Were you worried about that?
He had to evacuate all of the oxygen and co2 completely out of the system first. So there is really no danger in it being flammable unless he punctured it and then quickly put a flame up to the puncture.
Is propane compatible with the compressor lubricant???
If it is in transparent glass tubes, will be great helpfully to see inside whats actually happens
amazing, every other fridge video used heatsinks and fans or the peltier effect which is crazy inefficient,
What exactly is the practical application/purpose of this build..? Or is this just an educational model of sorts..?
Is this the same way in which liquid nitrogen would be made?
Many of the principles apply, but propane couldn't get to those crazy
low temperatures. Check out Applied Science Channel. He has liquified
nitrogen. The industrial process is done differently.
ua-cam.com/video/7PWESWqhD8s/v-deo.html
why is the room spinningggg
How safe is propane to use as a refrigerant?
Matthew Mckinney it's reasonably safe. Many commercial upright freezers use r290 now. Isobutane (r600a) has been used in residential refrigerators in Europe for 2 decades. Increasingly common in the US.
M.C. Pletcher i heard of people recharing their old cars that ran on R12 with propane. Thought it was crazy talk till now.
Matthew Mckinney I think it's usually a mixture of propane and isobutane to work well with the existing system.
sadly this might be only compressed homemade refrigeration system. good job.
Eric jones you're right. Didn't specify!
No, it’s not! Shaun Dobbie made a few, and there are some other less known UA-camrs who have. For example, M4J5TER made a 3-stage cryogenic refrigeration system with which he was able to get liquid nitrogen. He also made his own ethylene for the second stage with catalytic conversion from ethanol over alumina, and refined it afterwards for use as a refrigerant.
Propane saves because it need less electric power to do same cooling as freon.
"Homemade build"? Was it made or was it built? I don't get it.
If you build it, you made it...😛
Your superheat is too damn Low!
---> Put a Fan in that fridge! Or add coils... Ha Ha
Samual Whittemore That was the whole point of the thing. It has a large enough accumulator to allow for low superheat without flooding the evaporator. Granted, propane refrigerant probably should have a bit more superheat to prevent washing out the bearings or bushings in the compressor. This video was pretty early in my stint into refrigeration. Thanks for the comment!
It's the contained ( better controlled ) distillation of a substance that when separated by process , chills at a lower boiling point . Distillation and condensation of " referigerant " in ... Essentially , a vaccume . Pure ammonia and distilled " pure " water is an exelent refrigerant ... Do some research ... Crosley Icy ball .
The whole bit , explains easier with an apparatus which isen't as complex .
Shouldent mess with any of it without a thourough understanding . Involves pressures , poisons , structural materials that need to withstand both while being effectively regulated by thermostat & pressure sensor controls .
Very cool man - and no apologies needed, it was interesting.
So here is a question. Based on Trompe Hammer technology (which is actually two very old ideas connected in series) - see here: ua-cam.com/video/8wX4WtOHFZE/v-deo.html I was thinking about trying to make a refrigeration system for a "greenhouse" to prolong cool season vegetables. Let us take as a given that I am able to generate 150PSI of pressure, but this is just standard air - not propane - would it be possible to build an effective refrigeration system for a relative large space?
I understand you are using propane because its boiling point allows you to more easily move heat from one space to another, but if we were to use regular air - could it be done? How do I do the math to determine what my variance needs to be? I very much appreciate your thoughts.
Thanks!
Air refrigeration systems have been around for a very long time, but they usually involved the compression and re-expansion of LARGE volumes of air. The specific heat capacity of air is just not very high. They were competitive for a time in the 19th century, especially on ships where an ammonia leak was quite dangerous.
If there is a few kw of power there, then I suppose something could be rigged to provide cooling for a large space.
How did I got here?
Refrigeration is so easy to explain its not even funny. Many things use the same principles of refrigeration. For example the water cycle. Water in the ocean evaporates after its absorbed heat from the sun, The water vapor rises loses heat and the temperature drops and it condenses back into liquid and falls down as a liquid in the form of rain.
Same with refrigerant. Liquid refrigerant absorbs heat inside the fridge, it evaporates and goes back to the compressor and gets compressed, which makes the refrigerant get hot and the vapor goes into a radiator where it gets cooled down by a fan, whcih is removing heat and that causes the vapor to condense back into a liquid and then it goes through a valve that changes the pressure to a low pressure which allows the liquid refrigerant to be able to absorb heat and repeat the cycle again. Simple.
BOILING PROPANE
It just sounds "goofy"
I think you need to take some time and go to inplix website to learn how to make it.
you're wrong the condenser, Actually bowels the water
G
F
seriously bro, if you wanna explain how something works in it's simplest form why don't you build a basic refrigeration setup, this is your custom Frankenstein. lol
You babble a lot