Questions tagged [cooling]

Questions regarding Cooling electronics. Varies based on needs, can include Fans, Heatsinks, proper ventilation, Peltiers, or PCB design and mounting. Could also refer to Cooling applications, like freezers in industry. Repair questions for Cooling applications will most likely be closed if outside the Scope of the Site and FAQ. Try DIY.StackExchange.com for those.

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Gasoline generator + Peltier configuration

I have a DIY cooler box with Peltier element 12V/3A/27 watts and want to connect via power supply to gasoline generator with output 600W at 5A max. Would that be a problem and not supply my Peltier ...
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TEC cold side temperature decreases, then increases rapidly [closed]

first post to this stack exchange. Self teaching on TEC circuits. I bought a diymore TEC1-12706 12V 60W 6A. Note no heat sink installed on the TEC. To test the TEC I put together a series circuit as ...
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Can the polarity of a 12V brushless CPU fan be reversed?

Can the polarity of standard CPU 12VDC brushless fan be reversed? For my application it is fine if the an is not broken afterwards. Please see the image of the an below:
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Peltier device stopped working

The peltier device worked well when i submerged the hot side in a frozen alcoholic gel, but then when i unplugged it from power and washed the device with water it stopped working. It doesn't get hot ...
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What wire size to be used for Peltier cooling

I'm making a project with three Peltier in parallel (12V & 6A) each (TEC 12706) for cooling. I would just like to know the wire size to be used in (AWG or mm2), for running project smoothly.
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Peltier stopped working

I am creating a sort of food cooler using a tec1-12706 peltier element since i figured the casing where the food goes in is already made of an heat/cold conductive metal. The cold side was not ...
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Are there water heating elements that literally explode when turned on dry?

When I grew up these things were pretty commonplace: In case you've never seen one, it's a very primitive water heater that you simply place inside a pot of water (or a jar, or even a cup of tea-to-...
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Electric shock through thick rubber tube filled with coolant and carrying a high voltage wire

I have two Litz wires coming out of a coil. The coil is driven with short pulses of 20 kHz sinosoidal voltage with a peak of 1.4kV. Each Litz wire is insulated by 3 thin layers of mylar sheets in ...
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4 votes
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Are solar panels ever used to remove energy?

Solar panels convert energy from the sun into electrical energy. Following the first law of thermodynamics, this means they remove some of the solar energy that would otherwise most likely be absorbed ...
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Is it safe to connect metal body capacitors with a metal heatsink?

I have multiple metal case capacitors that I need to cool. The thermal tape I use is conductive (carbon based). Also larger heatsink on the left might touch capacitors on the left side. The question ...
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2 votes
1 answer
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How can the efficiency of LED emitters be approximated?

The data sheet usually indicates the power consumed and the luminous flux in lumens. The luminous flux per watt can be calculated from this, but this does not allow any direct statement about the ...
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Cooling 1.5 cu ft with a TEC1-12715 Peltier

I'm trying to modify a standard cooler (about 1.5 cu ft) so it no longer requires ice. I want to get the interior to 35 - 40F assuming the ambient temperature is about 75-80F. However, I don't have ...
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Safe to run 2N2222A at 0.4 W? possible NPN alternatives to 2N2222A

The datasheet for my 2N2222A claims it can run at 0.5 W. I am running it at nearly .4W. My casing has good ventilation via a large fan. Should I search for a component which can handle more power, or ...
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Using TEG to generate electricity for cooling car interior parked in sun

I am working on how can I cool down or normalise interior temperature of cars parked in sun for too long as they get real hot. So I thought if this could be done by thermoelectric generators. I don't ...
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Safe to run a 1/2 watt resistor at 0.4 watts in enclosed housing?

I have a circuit that dissipates 0.4 watts through a 1/2 watt resistor. It gets quite hot to the touch. Every other component in the system is cool. I am just trying to make sure this is safe in a ...
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Power supply rated for "140 watts with natural convection" - Does it need a fan?

In the data sheet for my CUI VOF-225C power supply, under mechanical, it is mentioned that : cooling - natural convection (no integrated fan) Does this mean I do not need to run a fan with my power ...
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Heatsink needed to keep my resistor from damaging due to heat

I am looking to find an appropriate range of heatsink selections to maintain my resistor from damage due to heat. I am using a flat plate (SS) resistor from ARCOL (TFBR900). It is rated for a 900 ...
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Peltier not cooling

I am looking for a little help as I am trying to make a small Peltier cooler and having a little trouble. FYI I have very little idea on what I am doing just got an idea off of youtube and gave it a ...
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How to estimate thermal impedance of a closed aluminum chassis?

I am contemplating whether or not I need chassis perforations for heat dissipation in a project. The box is roughly 440 mm wide, 280 mm deep and 85 mm high (2 rack height units aluminum enclosure.) ...
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Attach heat sink to cpu cooler in order to decrease CPU temperature

The best SMALL FACTOR cpu cooler that I have found so far is this one: I am building a portable PC; therefore, the smaller the better. I have already checked the specifications and that cpu Noctua ...
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How can I calculate the power needed to increase/decrease the temperature of an object by x degrees when using a Peltier module?

I am working on a cooling system using 4 Peltier modules. I would like to somehow determine the power I need to reduce the temperature of the object attached to the Peltier module by x degrees Celsius....
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How to add 12V cooling fans to existing 48V circuit?

I have a 48V stepper running off a 240W supply, max current of the drive is ~4A. I am looking to add an 80mm cooling fan to this circuit. I know 48V fans exist, but 12V are more widely available and ...
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Reduce cooling power of refrigerator [closed]

I have a refrigerator which I want to use to store electrical device (I don't want them to get hot). I have successfully drilled a hole through the refrigerator door so that I can supply the ...
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I need more information about PowerPAK-SO8 thermal properties than i can find online

There are these MOSFETs in PowerPAK-SO8 (Vishay) package (or SuperSO8 for Infineon). I used to cool them from the outside, attaching a heatsink to the black (plastic? ceramic?) case worked pretty well....
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Why aren't current CPUs designed for more powerful cooling systems? [closed]

Chips on the present can't get smaller, higher speeds and voltages increase heating, so why don't CPU manufacturers aim for more powerful cooling systems instead of looking for parallelization? We are ...
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How to test a Peltier module TEC1-12705 to determine if it works as intended?

Background: The module comes from a 70W mini-cooler which doesn't really cool anymore. I took it apart and got the module out, I could read the model TEC1-12705 from the module itself. The ...
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Why does reciprocating compressor's motor starting winding have high voltage than running winding

I want to know why the starting winding of (2 ton) reciprocating compressor's motor have high voltage than running winding? I have attached the voltage that I have captured from oscilloscope. This ...
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Linear Power Supply Design Thermal Control

I am a electronics hobbyist trying to make a linear power supply/phone charger. This is a schematic that I have created. Optimally, my load would be a phone charging at 1A and 5V from a usb jack with ...
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Peltier cooling calculation - Help ! :)

I have gone through many of online blogs and websites for guidelines about selecting Peltiers but somehow I am still lost in the middle. I am still missing major numbers to be able to select which ...
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Can I choose a heatsink based on its thermal design power (TDP) for cooling LED chips?

I am confused about TDP ratings and what they refer to actually. The reason I am confused is because most modern CPUs and GPUs, although not ideal, are able to sustain very high temperatures (80 C or ...
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Which aluminium extrusion for LED strips has better cooling?

I have a choice of two aluminium extrusions for LED strips. They have identical dimensions, except the one on the left has "wings" on both sides. They will be installed in free air, ...
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Cooling a box 1X2 m with TEC module [closed]

I want to know is possible cooling a box in 1 * 2 m size by peltier? please help me thanks
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Converting 3-pin brushless fan to 2-pin

I need to replace a 2-pin fan on my PSU unit. The fan is 40x40x20, DC12V, 0.15A. I am replacing the fan because the noise is unbearable, >75dB right next to it. Can I simply buy a 3-pin fan and ...
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Cooling circuit board for troubleshooting

I'm trying to troubleshoot an LCD TV. It turns off at random intervals I'm guessing as it heats up with use. I want to determine which PCB is failing with heat, and then even isolate the area on the ...
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4 votes
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Are fins necessary/required for cooling in a closed room

i am trying to design an efficient cooling solution for my project. I planned placing a IoT computer in an aluminum housing which is completely closed. In this case, do I really need fins and large ...
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1 vote
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Optimise Peltier cooling system: PWM or not?

SETUP I have a special test setup for some small circuits that should be cooled down (by air) in a closed box with Peltier elements. It mainly consists of 2 peltier elements (ET-127-20-15 from ...
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Does anybody know a better way to cool a heatsink that is not a fan? [closed]

I am designing a portable distiller powered by the sun. I will be heating the water with a heating coil and then when the water evaporates I will be collecting the stem in a metal tube(not sure what ...
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1 vote
3 answers
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Calculating PCB temperature increase

so I have created a PCB with a lot of components on it, its a rather large PCB, roughly 18cm x 19 cm. A lot of the components' datasheets (things like Resistors, Switches, capacitors, relays, CAN ...
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Can you desalinate or distill water with a Peltier module?

Can you use both sides of a Peltier module to distill water? Using one side for heating and the other side for cooling. If so what type of Peltier module do you need and can you make it solar powered? ...
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Can a faulty motor cause issues to another motor?

This is regarding the circuit of my 3D printer mainboard. I had an obersvation: It has a cooling fan (40X10 24V) which is having issues lately - it stops working sometimes, and when pushed to rotate, ...
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Transformer cooling difference between water cooling and air cooling [closed]

I just know air cooling method is cheaper than water cooling method. Please tell me what is the difference between air cooling and water cooling? And if you could please use some pictures to explain ...
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11 votes
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What is this spongy material?

Hi, while I am tring to repair electronic circuit. I'm encountering this sponge. I wonder what is this sponge? and can I find out what it is used for. I often see this in sensitive circuits like in ...
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Maximum temperature of an electric motor and proper cooling system

I have found an electric motor in my home and I want to estimate how much time it can operate until its temperature becomes too high and eventually build a cooling system for it (I have seen that ...
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thermal conductivity of a liquid cooler

I'm a high school student in a class called EDD, where we design a product and produce a prototype of said product. I have one issue though: My team bit off more than we could chew, and we have no ...
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Why does this AC axial cooling fan have 3 wires?

I'm restoring a 1970s HP Frequency Counter and went to replace the 110V AC tube axial cooling fan on the unit to discover that it has 3 wires. The original fan is a ROTRON 1 PH CAP 0.25MFD fan. I'm a ...
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Controlling a shaded pole fan via light dimmer switch? Which among these two fans are better for cooling?

I'm building a DIY lab round flask heater using a fiber glass 250mL GLAS-COL M102, 180 Watts heater mantle. The temperature will be controlled via a PID controller and a K-type thermocouple. Since the ...
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Air circulation and condensation in custom enclosures for outdoor project

I am designing 6 custom enclosures in mild steel to be placed outdoors for 5 months in London UK. They will be interconnected, only one will contains 4 power supplies, all with conformal coating and ...
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Using a small heatsink with a high power LED (50W)

Description I want to use a 50 Watt LED like this one (42mm*40mm) The space to integrate this component is limited. I have only 55mm*55mm*30mm in total. So the LED + Heatsink size must not be higher ...
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Controling linear PSU temperature

In many digital lab PSU designs, designers usually use a thermistor to control the cooling fan speed based on the main regulator actual temperature. When we have both current and voltage values, is ...
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Why does a Peltier cooler heat up when cooled by ice?

On this post, the question presents a problem of a Peltier cooler heating up after operating for a while. The explanation was that the Peltier cooler is only able to maintain a fixed temperature ...
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