I once tried to use about 6-7 3W each resistors to make a 50Ω dummy load for my RF amplifier testing.I submerged them in water and they can even handle 1kW continuously and 1.6kW peak.
Distilled water has been used to cool 415VAC 3 phase thyristor bridges and inverter circuits.. where all devices had the common distilled water supply..... Distilled water is a sufficiently good insulator...
nice demonstration... the last segment reminded me the rain we hear in movies and other cinematic productions is in fact a recording of sizzling oil in a pan :)
Nice video, these topics are not much covered in the internet so keep up the good job. Maybe you can make a comparison between the performance of a normal aluminum silver heatsink and a black anodized one, both of the same size.
I once set up a lab with a 5W resistor which was manufactured inside an aluminium extrusion. The idea was some sort of temperature control and we mounted it on a heatsink with a fan. Overdriving it was a mistake as the thermal resistance between its conductor and the extrusion was too great so it didn't take long before the conductor vaporised and the internals exploded out one end. Yes, we jumped!
I've had a similar incident where I put several kW into a 50W aluminium resistor, so terrifying!! Apparently my university's power lab used to have warnings up saying to avoid the extruded resistors because their explosions are so violent 🤣
Can you help design a circuit? Battery monitor LED, that flashers fast and faster as the voltage drops! I had a circuit many moons ago from Elector or ETi magazine but I don't have it any more,,, 😐
Yeah I would like to try that some time, really push it to its limits. I imagine the thermal resistance of the ceramic package would probably be the limiting factor at that point, making it impossible to keep the innards of the resistor cool
"this air-flowy thing happens.." Are you you going to be covering any other mechanical engineering topics in the future? Seriously, though - loving your videos, keep it up.
I’m not a physicist, just using whatever letters I feel like. People get the idea that’s all I care about if they want more detail or some equations they can read Wikipedia
Great video! The imaginary temperature, current time graphs it produced were very insightful!! Then wondering what happens to the graphs if you put the whole rig (including the fan) in a box and try and cool it with a refrigerator motor, then put that whole rig on a giant ball of rock a few million miles away from the biggest nuclear fusion reactor you can see in the sky, ... 🐧!🌅🌡🔥
I once tried to use about 6-7 3W each resistors to make a 50Ω dummy load for my RF amplifier testing.I submerged them in water and they can even handle 1kW continuously and 1.6kW peak.
Most of the current would be flowing through the water..
Distilled water has been used to cool 415VAC 3 phase thyristor bridges and inverter circuits.. where all devices had the common distilled water supply.....
Distilled water is a sufficiently good insulator...
2:21 - “Note: No really important resistors were harmed during the production of this video.”
That's acually very impressive not gpnna lie
nice demonstration... the last segment reminded me the rain we hear in movies and other cinematic productions is in fact a recording of sizzling oil in a pan :)
If only we still had that flir thermal imaging camera 😂 Great video!
Ooh yeah! If only...
@@electrarc240 Time to diy one with the 10$ single point sensor and an esp32! Or you can grab the 40$ ish camera one!
That resistor under water sounded like bacon frying! I'm getting hungry... going for breakfast now! 😄
Nice video, these topics are not much covered in the internet so keep up the good job. Maybe you can make a comparison between the performance of a normal aluminum silver heatsink and a black anodized one, both of the same size.
I once set up a lab with a 5W resistor which was manufactured inside an aluminium extrusion. The idea was some sort of temperature control and we mounted it on a heatsink with a fan. Overdriving it was a mistake as the thermal resistance between its conductor and the extrusion was too great so it didn't take long before the conductor vaporised and the internals exploded out one end. Yes, we jumped!
I've had a similar incident where I put several kW into a 50W aluminium resistor, so terrifying!! Apparently my university's power lab used to have warnings up saying to avoid the extruded resistors because their explosions are so violent 🤣
Really interesting video as usual 👍
The resister sitting under water is a lot like a resister sitting in still air. If the water was flowing it would make a huge difference. Cool video
Genial !!! muy interesante verlo de esa manera, una resistencia que no debería poder manejar 5W
Completamente de acuerdo!
Can you help design a circuit?
Battery monitor LED, that flashers fast and faster as the voltage drops!
I had a circuit many moons ago from Elector or ETi magazine but I don't have it any more,,, 😐
how about putting it in pressurized water, looks like it was making lots of air bubbles that ruins heat dissipation
Yeah I would like to try that some time, really push it to its limits. I imagine the thermal resistance of the ceramic package would probably be the limiting factor at that point, making it impossible to keep the innards of the resistor cool
An informative video. Isn't similar things are happening now with CPU of the server you take such a good fan (and lots of cooling) from 😅?
What about a normal computer fan?
Much less cooling, though any airflow helps!
"this air-flowy thing happens.." Are you you going to be covering any other mechanical engineering topics in the future? Seriously, though - loving your videos, keep it up.
Ah yes my speciality ;)
Whay you use V as velocety insted of U or E.. It is in korekt. V is unit. U=240v can't be V=240V??? Wat dø fak🤣
I’m not a physicist, just using whatever letters I feel like. People get the idea that’s all I care about if they want more detail or some equations they can read Wikipedia
Great video! The imaginary temperature, current time graphs it produced were very insightful!! Then wondering what happens to the graphs if you put the whole rig (including the fan) in a box and try and cool it with a refrigerator motor, then put that whole rig on a giant ball of rock a few million miles away from the biggest nuclear fusion reactor you can see in the sky, ... 🐧!🌅🌡🔥