$2 for 5pcs 1-4 layer PCBs ;PCBA from $0 : jlcpcb.com/DYE 3D printing services as low as $0.07/g, 48hr build time Support Ludic Science on Patreon: / ludicscience
I really appreciate that you explain this with the First Law of thermodynamics. I usually go with the Second Law, that you cannot have 100% efficiency in a heat pump. But the nature of the Second Law makes it cumbersome to explain if the audience is not already well versed in basic concepts related to that law.
Nice simple experiment. Another way of looking at it is as a measure of efficiency. If the cooling was 100% efficient then the temperature change would be zero. You can calculate the watts lost by using the formula; Watts = specific heat capacity (c = 1 for water) x mass of water (m) x change in temperature in C (T) / amount of time the device was on (t). Good way of testing Peltiers though am not sure that like being soaked in water, maybe seal the edges and then immerse them in water?
I question the results in a way. Since heat rises and your have it at the top. Also I dont know if the hot side was up or the cold to go direct at the sensor. Best to measure the water before leave it for a bit and then take it out and swirl it and measure again. Or maybe your results are correct that it gives off more heat than cold.
Actually there is kinetic energy conversion. The water will cause a convection current. The hot water will move into the cold water making the water move.
If you are both heating and cooling water, the hot water will rise and the cold water will sink. Isn't that turning electrical energy into kinetic energy?
Наука
I recently found my old Peltier device and your video was great timing. Thank you!
great!
I really enjoy watching all of your posted videos, especially the ones demonstrating simple machines.
Thanks!
I really appreciate that you explain this with the First Law of thermodynamics. I usually go with the Second Law, that you cannot have 100% efficiency in a heat pump. But the nature of the Second Law makes it cumbersome to explain if the audience is not already well versed in basic concepts related to that law.
Nice simple experiment. Another way of looking at it is as a measure of efficiency. If the cooling was 100% efficient then the temperature change would be zero. You can calculate the watts lost by using the formula; Watts = specific heat capacity (c = 1 for water) x mass of water (m) x change in temperature in C (T) / amount of time the device was on (t). Good way of testing Peltiers though am not sure that like being soaked in water, maybe seal the edges and then immerse them in water?
Thanks! Edges are already sealed but of course they are not designed for this..
I question the results in a way.
Since heat rises and your have it at the top.
Also I dont know if the hot side was up or the cold to go direct at the sensor.
Best to measure the water before leave it for a bit and then take it out and swirl it and measure again.
Or maybe your results are correct that it gives off more heat than cold.
should do a video on stacking multiple TEC's together. The results are interesting. No one ever does this. :)
Good idea maybe we con get very low temperatures
I also enjoy and learn ludic science video thanks sir
Thankyou
YOU ARE REALLY GREAT , THANK YOU FOR GIVING US KNOWLEDGE SIR ONES AGAIN THANK YOU.
Thanks 👌
Very good video my Friend 💪
👍 thanks 👌
Actually there is kinetic energy conversion. The water will cause a convection current. The hot water will move into the cold water making the water move.
Also he is placing the probe directly over the hot side, therefore his postulation is incorrect. Near the cold side his probe would show a lower temp.
You´re right I forgot convective movement.
It was interesting.
Thanks 👍
Interesting
Thanks
If you are both heating and cooling water, the hot water will rise and the cold water will sink. Isn't that turning electrical energy into kinetic energy?
True
U r from which country ??