Great vid. I've been looking into experimenting with Peltier devices for a while, and have just re-vamped my motivation to do so. Would you happen to have a chart depicting the stand alone temperature differences between the two sides of a peltier device using the variable of amps?
@ryukenosuke I do not have a chart like this, but I can make a prediction. My prediction is that anything above and amp or two, you will have a temperature difference of around 70 degrees Celsius and as you raise current the temperature difference will not change very much at all, maybe 10C at most. This is because the peltier has a absolute limit as to temperature differential between both sides, so without heat sinks it will quickly reach that differential limitation.
zr2ee, If you notice the fan is on the heatsink that is on the room side of the peltier junction (not on the cup side). He could use a seperate power lead so as not to measure the fan power in the calculations. He shows the 51000/19800 =2.575757 which is approx 2.6 COP as he said. For comparison I did the math on a 5000btu window air conditioner with an EER(BTU per Watt) rating of 11 and as I remember it the COP was around 5
(5 BTUs of heat moved for every one BTU of electricity used).
To measure the heat transfer function only. The heatsink needed to remain constant temp. If I had allowed the heatsink to increase in temp along with the water then the resistive heating of the peltier would have been the majority of the input.
why do you need a fan on the heatsink if your heating the cup? don't you want the temperature differential to be as small as possible for better efficiency?
do these units increase output with increased surface area?
scfitch 6 months ago
as a generator, what is highest temp these units will withstand???
josephdupont 1 year ago
@josephdupont The specs are listed on peltiers. Typical temps though range to as high as 180-200C roughly.
HellTriX 1 year ago
Well Thank you for answer my question as to heating water using the peltier effect.
one would think that you could use heat pipes below your home
and then draw heat out att 55 and heat your house with not mechanical parts.
The other idea is to mount a hot water preheaster on top of a fridge and cool 'and heat at the same time.
you should put it over a thermos... and cool soda while preheating water
the nice thing about pre heating water that the btu you save is benificial
josephdupont 1 year ago
HellTriX, very informative, thanks. bobo888bobo, the 5 and 2.6 figures are useful, too.
FindandSeeker 1 year ago
Great vid. I've been looking into experimenting with Peltier devices for a while, and have just re-vamped my motivation to do so. Would you happen to have a chart depicting the stand alone temperature differences between the two sides of a peltier device using the variable of amps?
ryukenosuke 1 year ago
@ryukenosuke I do not have a chart like this, but I can make a prediction. My prediction is that anything above and amp or two, you will have a temperature difference of around 70 degrees Celsius and as you raise current the temperature difference will not change very much at all, maybe 10C at most. This is because the peltier has a absolute limit as to temperature differential between both sides, so without heat sinks it will quickly reach that differential limitation.
HellTriX 1 year ago
Thanks for the reply and info.
ryukenosuke 1 year ago
hi, is the current in milliamps, or amps?
hermin 1 year ago
Amps
HellTriX 1 year ago
zr2ee, If you notice the fan is on the heatsink that is on the room side of the peltier junction (not on the cup side). He could use a seperate power lead so as not to measure the fan power in the calculations. He shows the 51000/19800 =2.575757 which is approx 2.6 COP as he said. For comparison I did the math on a 5000btu window air conditioner with an EER(BTU per Watt) rating of 11 and as I remember it the COP was around 5
(5 BTUs of heat moved for every one BTU of electricity used).
bobo888bobo 2 years ago
where do u get the peltier
BBoyFleXx 2 years ago
To measure the heat transfer function only. The heatsink needed to remain constant temp. If I had allowed the heatsink to increase in temp along with the water then the resistive heating of the peltier would have been the majority of the input.
HellTriX 2 years ago
why do you need a fan on the heatsink if your heating the cup? don't you want the temperature differential to be as small as possible for better efficiency?
zr2ee 2 years ago