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Can a Peltier module be driven with a voltage?
Peltier modules can be driven with voltage sources but doing so will make it more difficult to accurately control the heat flow and temperature difference across the module. The required voltage compliance of the current source will be determined from the Peltier module datasheet and operating constraints.
Where does the power come from in a Peltier?
They instead pass their operating power on, in the form of heat, to their hot side, along with whatever they suck out of their cold-side load. 50 watts (say) may go into the cold side, but easily three times that can come out of the hot side, for a high power Peltier. This is where the water cooling part comes in.
How is the surface area of a Peltier module determined?
The surface area of Peltier modules is typically specified based upon either the area of the object to be cooled or the area available for heat dissipation. An area mismatch between the area available and the area of the Peltier module can be compensated for by the use of a low thermal impedance heat spreader.
What happens when you put a Peltier on a processor?
The better the Peltier and the higher the voltage – up to a ceiling of about 16 volts for most models – the bigger the temperature differential can be, and the more heat they can transfer. So you stick a Peltier on your processor, you run it from your computer’s Power Supply Unit (PSU), and suddenly the chip’s colder than ambient.
How is a heat sink used in a Peltier module?
A thermoelectric module will transfer heat from the object to be cooled, while a heat sink is required to dissipate both the heat transferred through the Peltier module and the heat generated from the electrical power source.
Which is the most efficient way to connect Peltiers?
For this reason, a well designed combination of proportional control together with idle power throttling can be the most efficient method to date. If your peltiers are rated at 12 volts, and you’re using a 12 volt supply, you should be connecting them in parallel, not series.
Can a heat spreader be used as a Peltier module?
An area mismatch between the area available and the area of the Peltier module can be compensated for by the use of a low thermal impedance heat spreader. A simple heat spreader can be manufactured from aluminum or copper. Peltier modules are current-driven devices similar to LEDs.