Questions tagged [peltier]

The Peltier effect is a reversible physical process which is exploited in Peltier cooler/heater. The flow of current through this device pumps heat from one plate of the device to the other. This can be used to both heat and cool electronic components.

Filter by
Sorted by
Tagged with
49
votes
3answers
75k views

How to drive a Peltier element?

Maybe the underlying question is what the Voltage-Current curve looks like. Can I drive it from a voltage source (like you drive a heater) or from a current source (like you drive an LED)? Or even ...
23
votes
7answers
28k views

Can Peltier devices be cascaded?

Can Peltier devices be cascaded to create a bigger temperature difference? Like mounting one on top of anther one to increase the maximum difference from 60 degrees C to 120 degrees.
13
votes
4answers
21k views

Thermistor control of peltier voltage with Arduino (for DSLR chill box project)

I am mildly familiar with electronics, mostly from playing around with electronics kits as a kid. That was a long time ago, though, maybe as much as 20 years ago. I am currently working on a cold or "...
11
votes
2answers
14k views

Are peltier elements polarized?

I'm looking to add a peltier element to one of my projects. However, I want to sometimes heat and sometimes cool, depending on the ambient temperatures on both sides of the element. Image from ...
9
votes
4answers
18k views

Is it worth to try making peltier based refrigerator?

I built a box from 5cm thick Styrofoam with outer dimensions 60x55x80cm. I wanted to use it as a fermentation chamber for home brew purposes. The reason why I did not choose regular (some used cheap) ...
7
votes
5answers
9k views

Why peltier elements have smaller heatsink on cold side?

I have seen in nearly all configurations that Peltier elements are mounted with huge heat sinks on hot side as compared to tiny ones on small side. Is this just a way of explaining the need of heat ...
6
votes
3answers
826 views

How do electrons carry thermal energy in Peltier coolers?

I've read that when electrons enter from metal to semiconductor type N, they gain thermal energy and make that side cooler and the reverse happens when they leave semiconductor to the conductor. Why ...
6
votes
1answer
9k views

Thermocouple array for generating free electrical energy?

Thermocouple is a material (junction between two different metals) which generates potential difference in terms of millivolts, isn't it? Why don't we create a matrix of thermocouples (many ...
6
votes
7answers
5k views

Building a safe low-temperature heat box : heat sources

I'm not sure if this is more of a physics or electronics question, but here goes: I use a heatbox with a temperature in the range of 80-100F for warming wax (for sculpture modeling). My current ...
5
votes
2answers
3k views

What are the efficiency limits of the Peltier effect?

I understand that thermoelectric coolers are perhaps a quarter as efficient as heat pumps. Why? What is the source of this efficiency limit? What would have to change for thermoelectric coolers to be ...
5
votes
2answers
6k views

Smoothing a High Current PWM

I am using a MOSFET to control the average voltage to a device by varying the duty cycle to the base as shown in the diagram below. My question is what is the best circuit to use in the "filter box" ...
5
votes
2answers
840 views

Corner of Peltier module is very hot

I've bought a generic TEC1-12706 Peltier module and I'm having trouble making it work. I wired it to a 12 volts DC, 8-amp power supply, and connected the hot side to a fan & heatsink with thermal ...
5
votes
2answers
109 views

How can I measure moisture on a conductive flat surface as an analog/digital value?

So as the title states, the question is: Is there a way to measure moisture on a electrically conductive flat surface? Optionally, it would be great if I could have an indication of the amount of ...
4
votes
3answers
511 views

Do Peltier and heater make a good combo for thermostat?

I want to achieve 0.05C stability in closed space to fit 24 bit ADC and voltage reference. Is it a good idea to use Peltier and heater together ?
4
votes
2answers
629 views

What's this thing in a peltier cooler?

I've taken apart a peltier cooling box to salvage the peltier element and also found this thing. The block seems to be plain aluminum, I'm interested in the cylindrical thing at the bottom. The ...
4
votes
5answers
5k views

Is it possible to obtain very small Peltier modules with fast response times?

I have a thin 2x2 mm surface that I'm trying to cool by 5-10 degrees Celsius in 1 second or less. Some very rough back-of-the-envelope calculations reveal that I need to remove ~50 mJ of energy to do ...
4
votes
1answer
474 views

Finding a 12 V Peltier module that reaches less than 0 °C on the cold side

I am making a small cooler box using a Peltier. At first, I used a Tec1-12706 without researching first, and it barely went under 12 °C at the cold side. I need a Peltier module that is 40 mm x 40 mm ...
4
votes
2answers
404 views

Does changing wire gauge change output of a thermocouple?

So I've been experimenting creating thermocouples with copper and constantan wire, just by twisting them together at one end and heating the junction with a candle and using a voltmeter to measure the ...
4
votes
1answer
1k views

What happens when you connect hot and cold sides of Peltier device together?

I would like to know how the Peltier device would act if you heat sink the hot side WITH the cold side. Would it just sit there and consume power? I need something to consume ~15 watts or more at 14V....
4
votes
1answer
1k views

Powering electronics with a low-cost thermoelectric generator?

When I replaced my water heater, the installer was telling me how cool the Bradford White unit I got was because the electronics are powered by the same heat used to heat the water in the tank. I ...
3
votes
3answers
29k views

car A/C using peltier devices, is it feasable'

In a couple of forums where we are working on kit cars with VW air cooled engines and therefore little room for conventional air con compressors etc we are looking at electronic means of getting ...
3
votes
4answers
4k views

TEC1-12706 Peltier run from diffirent voltages

My question relates to a video I saw on youtube. In this video, the user is cascading 3 TEC1-12706 peltier modules to achieve temperatures of -50 on the cold side of the cascaded peltier. The TEC1-...
3
votes
3answers
9k views

Trying to understand Peltier module specification

I baught this module The specifcation says: ...
3
votes
2answers
3k views

Thermal Paste on Cold Side of Peltier Freezing and not transferring “Heat”, what gives?

I am running a peltier element, and on the cold side an aluminum heat sink to effectively spread out the cool surface to the maximum possible surface area. I just bought this new thermal paste: ...
3
votes
4answers
14k views

Wiring multiple peltier units

First of all this question relates to powering Peltier units and not the physical relationship. I have two Peltier units and a 320w 12v supply similar to this the units are TEC12715. They are ...
3
votes
3answers
2k views

A device like a Peltier cooler which transfers heat to another surface not in direct contact with the cold side?

Back when I was a kid and first learned about Peltier coolers, I mistakenly thought they had the ability to transfer heat remotely from one surface to another via wires. I didn't realize the heat ...
3
votes
2answers
1k views

Are peltier devices linear?

Say I've got a peltier block that is rated at 15.2V and 6A, providing 90W of cooling power to one side. Will I be able to operate it at 5V, and will it draw 2A, providing 30W of cooling power? EDIT:...
3
votes
2answers
86 views

Using a Peltier element to power an Arduino

I got myself a Peltier element and want to use it for an IOT project. What is the best way to use the Peltier in order to power an Arduino or something similar every few minutes? (For my project it ...
3
votes
3answers
1k views

Thermoelectric cooler powered by 12V battery too hot?

I am very much an amateur when it comes to this stuff. Basically I have a set up that goes as follows: Aluminum plate -> TEC (cold side) -> TEC (hot side) -> heat sink -> fan. The battery is 12V ...
3
votes
2answers
4k views

Are cheap Chinese peltier modules efficient?

I'm developing a product that cools beverages and trying to decide what peltier modules to choose. I've noticed that some companies like Laird Technologies, CUI inc and TE technology offer expensive ...
3
votes
1answer
375 views

Regulator circuit design

I need to design a regulator for my thesis, but I really need help, Please! The topic: - A temperature regulator for a small fridge Some details: - the regulator has to control a peltier element ...
3
votes
2answers
2k views

Peltier with Mosfet - Heat Issues and Alternatives

I'm interested in using a Peltier device in conjunction with arduino as a precise temperature controller. I've followed the example below and have switched out batteries with a 12v power supply. After ...
3
votes
1answer
92 views

Will thermocouples sharing a common wire create inaccuracies during measurement?

Specifically, I've been working with pre-existing temperature cables which are T-type thermocouples which share the same Constantan wire. My question is if one of the thermocouple junctions is heated ...
3
votes
0answers
1k views

Peltier Driving Circuit

I am driving a peltier (thermoelectric heater/cooler) using a DAC (MCP4725), Arduino mega, quad-opamps to shift/invert the DAC voltage (LT1885) and 4xOPA549 (2 per peltier). I use PI control and ...
3
votes
0answers
3k views

Peltier driver with IR2110

I'm trying to drive a Peltier cell. The driver must allow both operation modes (cold/hot). To achieve this i'm using filtered 3.3V 100KHz PWM from a microcontroller to drive an H-Bridge (as far as i'...
3
votes
4answers
3k views

Two weaker peltiers vs one stronger peltier for cooling?

I'm planning on making a small water cooler for a project. I need to cool approximately 1.5L of water and have two TEC1-12706 (12v 6amp) peltier modules, and hoping to cool to as low as 6 degrees ...
3
votes
1answer
444 views

Will quickly switching polarity on a peltier damage it?

I am experimenting with different ways to heat up and cool down a peltier to a specific setpoint. Heating up the peltier to a setpoint using a PID has been relatively simple, and right now I am ...
2
votes
10answers
3k views

Heating a tube of aluminium electrically

I need to regulate the temperature of the surface of a tube of aluminium. The tube is used as a mandrel for composite molding/curing, so the target temperature is below 100C. Currently, there is no ...
2
votes
4answers
18k views

Peltier Unit Not Working

Recently I ordered a Peltier unit online and received it yesterday. Naturally, I was very excited to play with it. When I first turned it on, One side got hot, an another very cold. I had read that I ...
2
votes
2answers
287 views

Can I safely place a 60w between a 50w LED and a large heat sink that can dissipate 100 watts?

Today I have learned that Peltier devices can be used to generate electricity. I have a set up with a 50 watt LED which is glued to a very large heat sink that cools it without any fans (that can ...
2
votes
3answers
14k views

How efficient is a Peltier TEC1-12706 and TEC1-12715

I need to know some details about Peltier coolers before moving into making an air-conditioner. I have watched several videos on YouTube that demonstrate making air-conditioners with Peltier thermo-...
2
votes
2answers
379 views

How can I determine the alloy in a Peltier module?

Simple question, I know I have the following Peltier module : 12711-5L31-03CL. I have it's datasheet. I'd be interested in knowing its alloy so I can know it's Seebeck coefficient and thermal ...
2
votes
1answer
808 views

How can I tell what amperage a 12V rated electrical device will run at 5V?

I am buying a TEC 12706, a thermoelectric Peltier. It's rating is: 15.4V 6A (maximum voltage and amperage). I want to run this Peltier at 5V and was wondering how I would convert this data to see ...
2
votes
1answer
413 views

Can I dunk a peltier (TEC) module in ethanol?

I would like to remove the silicone rubber that surrounds the edge of the unit. My intention is to use the TEC as part of an optical power meter: it is painted black on one side and the terminals are ...
2
votes
2answers
8k views

Considerations for solar powered thermoelectric cooler with fan

I am building a food cooler for camping this summer. My plan is to build a thermoelectric cooler that is solar powered. My cooler is looking much like this: including a CPU fan on the hot side ...
2
votes
1answer
113 views

My TEC1-12710 peltier cell not cooling enough

I have a TEC1-12710 Peltier cell which supposedly consumes 10 Amps but when I connected to the power supply (12-15 Vdc 15Amp 180 Watt) the cell only used 4-5 Amp and didn't give me good cooling the ...
2
votes
2answers
5k views

TEC 12706 not drawing more than 1.6A when powered by a 12V PC SMPS

I have recently bought TEC 12706 device from Sunrom.com; The specification says that the device can draw more than 6A current at 15.4V and internal resistance is ~2 ohms. But when I measured the ...
2
votes
2answers
3k views

H-bridge/buck converter with negative and positive voltage range

as already questioned here, i am still working on peltier controllers. For that I am using a stepper motor driver (h-bridge) with a low-pass LC filter and the peltier element behind, as Olin Lathrop ...
2
votes
1answer
3k views

Selecting best Heat Sink for TEG (Thermoelectric generator)

I am trying to solve a puzzle about selecting the right heat sink for my TEG, but I am really confused and lost with lots of equations. Here is the Specification of my TEG (TG12-2.5-01L) Module Width ...
2
votes
1answer
62 views

General Peltier-tivity

[EDIT: Found a couple of 12715 units in the pile that did suck the full amperage, but despite excellent cooling of the hot side, could not deliver much cooling.] I'm waist deep in project to keep ...

1
2 3 4 5 6