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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.

2
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1answer
63 views

Faulty temperature sensor on PCB - lights keep blinking, how to replace this?

I’ve been working on a broken continuous operating high power LED system - it starts blinking when powered. This was an indication of overheating and it was clear that the cooling fans have stopped ...
0
votes
1answer
48 views

What are options for cooling a 5 cubic meter proofing box [closed]

I would like to make a proofing box, a piece of bakery equipment used control the environment of leavened dough while it rises. The electronics part of my project is almost complete. It has a ...
0
votes
0answers
82 views

Design temperature for an electrical control panel?

I am putting together an electrical control panel composed of small VFDs (like Siemens micromaster 440), PLC AB 1400 B etc, contactors, relays etc. What temperature and humidity should I design the ...
6
votes
3answers
646 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 ...
4
votes
2answers
486 views

Is Non-Passive Cooling bad for Lithium Ion Cells?

I'm in the process of designing a device capable of charging, discharging and testing internal resistance of 18650 cells. My device will be capable of testing 100x 18650 at the same time, each will ...
1
vote
2answers
50 views

Thermo Electric Can Heater / Cooler Heating vs Cooling Speed

I recently purchased a cheap (~$25) 36W thermoelectric cup holder designed to heat or cool a soda can sized object. It works very quickly for cooling and draws about 3A at 12V. For heating, it heats ...
0
votes
1answer
37 views

Is it sufficient to cool 4 TEC1-12708 (Peltier)?

Recently I tried to cool water with one TEC1-12706 (waterblock+tec+cooler) but for a lots of reasons (that I am now aware) it didn't cool water (1L in a closed cicle) under or even near 0ºC. I ...
0
votes
2answers
175 views

Beyond liquid helium cooling

Liquid helium has a boiling point of around -269°C and is used by overclockers. It has led to various world records (e.g. see here and here). What cooling technology can beat liquid helium for the ...
0
votes
5answers
174 views

How hot should wires get?

I am using 10 AWG wire to power a BLDC motor, and these wires can get quite hot. When an IC is intended for high power uses, it is common practice to put a heat sink on it, but what about for wires? ...
0
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0answers
38 views

May immersion cooling cause components to crack?

Just wondering if a component that has Moisture Sensitivity Level greater than 1 may also absorb ethanol or other coolant liquid used for immersion cooling and then crack when its boiling temperature ...
0
votes
1answer
79 views

Solutions for cooling solar panels [closed]

If someone wants to use solar energy in hot places, temperature is a problem. So, what's the solution for cooling the solar panel?
-1
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5answers
2k views

How many cubic feet can 1 peltier cool efficiently?

I want to build a mini fridge, however, I want to build it a bigger than the ones showed in the tutorials I've watched. For that I assume I need more than one peltier to cool it. However, for that I ...
0
votes
2answers
2k 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-...
0
votes
2answers
88 views

Ways to thermally manage a small enclosure?

hopefully this is an okay place to ask this question, but anyway, I'm working on a project to measure efficiency of a mono-crystalline solar cell based off temperature in the enclosure. The solar cell ...
1
vote
3answers
138 views

LT3083 heat dissipation

I was looking through a datasheet for the LT3083 regulator and in the typical applications sections this caught my eye: Provided input/output ratings could easily lead to over 20W being dissipated on ...
0
votes
1answer
58 views

Is it possible to cool an acrylic sheet with a Peltier (thermoelectric cooler)?

I am trying to create a cooling stage that can maintain 4 degrees Celsius however the stage must be optically transparent. Will a Peltier cooler be able to cool an acrylic sheet, or will the low ...
8
votes
3answers
2k views

Should I cool off in water the desoldered components?

I use a REGULAR (for home-use, not for electronics) hot air gun to desolder non-SMD components from PCBs. The components are really hot (naturally) after desoldering and it takes a while until they ...
0
votes
4answers
269 views

Is it possible to use a heatsink without a peltier plate?

At the moment I am working on a project which implies LEDs for street lighting. I need to dissipate around 24 W of heat. In order to do so, I calculated how much heat is dissipated into the air, and ...
-5
votes
1answer
205 views

Does Solar powered ventilation systems for parked cars really work? [closed]

Do anyone have experience with the efficiency of air ventilation cooling systems for idle parked cars? I know some cars in the more expensive range (Mercs, and BMW's and some Toyota's) have a built ...
1
vote
1answer
357 views

Driving a Peltier w/ PWM or analog out [duplicate]

I feel like this has been beaten around the bush in a couple other topics, but I am hoping to find something a bit more definitive. I am looking to control a Peltier thermoelectric cooler. I've got a ...
1
vote
3answers
195 views

Heat sink on the bottom or on the side?

I am considering a thermal design and due to space requirements I was considering different orientation of the heat sink, namely putting it bottom down, obviously, and puttin it on the side as in ...
0
votes
1answer
136 views

Expand heatsink contact area with larger copper plate? [closed]

I'm looking at DIY projects where a COB LED is cooled by an all-in-one CPU liquid cooler, however the contact area in a CPU heatsink will only fit one high-power LED. I'm considering how I could use ...
0
votes
0answers
541 views

Running a Peltier water cooler from a battery

I'm planning on using this unit: 12V Peltier water cooler for a portable heater/cooler. As such, I would need to run it off a battery. Based on what I've been reading, the best choice is a deep-...
1
vote
2answers
916 views

Heatsink calculations for a TRIAC

It's very rare that I get to design applications in need of cooling so I haven't had the need to study in-depth about that, but now I face an occation where I need cooling for a TO220 and I'm unsure ...
1
vote
2answers
76 views

Three phase rectifier heatsink

I need to choose a heatsink and a fan for cooling a three phase rectifier. Let's say that the total power dissipation is 1.8kW and that the rectifier is made of three half bridge IGBT/diode modules ...
1
vote
2answers
269 views

Will stacked Peltiers produce a greater dT? [duplicate]

I am using this peltier device to ramp an aluminum plate down to -10C in a vacuum environment. I chose this particular device because it had the largest 'Qout' of any single-stage peltier I could find ...
-1
votes
1answer
238 views

Peltier cold temperature does not transfer when a heat sink is attached

I am trying to build a peltier cooler. It works. Cold side temperature is about 10C on cold plate of peltier. I want to blow this cool air out. But the cold temperature goes up as soon as the ...
-1
votes
1answer
44 views

Installing split AC's outdoot unit in a cool place [closed]

I wonder if it would be efficient if a split AC's outdoor unit is installed 8 feet underground in a well with ventilation will be any efficient due to the constant temperature underground all year ...
28
votes
6answers
10k views

Why aren't CPUs cooled from below as well as above?

The transistory bits of an integrated circuit are approximately in the centre of the (plastic or ceramic) package. They sometimes get hot, and we cool them by affixing a heat sink to one side. ...
0
votes
3answers
352 views

optimize peltier element cooling

I am currently playing around with this Thermoelectric Peltier Cooler Setup: I have read that it's possible to cool these elements down to more than -20°. However, I got the elements for cooling an ...
3
votes
1answer
126 views

Temporary thermal adhesive for PCB measurement

I am making an examination on the effects of adding cooling to some existing electronics (making an comparison between having no cooling of the electronics and adding a heatsink or heatpipe + heatsink)...
0
votes
0answers
219 views

Adding Peltier module to an evaporative cooler

I'm planning to add a two Peltier module (TEC 12706 with heatsink on both sides) on a evaporative cooler but I cannot decide where should I put them. Here's the idea: Idea B would be good but I'm ...
1
vote
3answers
622 views

Big heatsink vs. small one with a fan

There's quite a bit of math to be done when you need to calculate a size for your heatsink. As there are many options to choose from if you don't know the size yet, is it just better to pick the ...
0
votes
2answers
244 views

What are the optimal conditions to maximize Peltier cooling performance and duration?

Hi first time poster here, I got a few peltier plates just last week and have been doing some research surrounding their polarity reversal and the limits of what they can do. However I still have a ...
0
votes
0answers
638 views

How does the power consumption and cooling capacity of a Peltier refrigerator change when the interior is made reflective?

I've a small Peltier cooler which I used to store some chemical stuffs. So, I recently modded the design to make it more bigger and improve its cooling + insulation. I've added an aluminium piece ...
0
votes
1answer
637 views

Transformer's oil circulation

Is it true that transformer's oil shouldn't be circulated (for cooling) cause it will change its properties and may cause a failure in isolation, if so does water cooled transformers has a special oil ...
1
vote
1answer
96 views

Trouble with the Cooling Power of Fans

Thank you for taking some time out of your day to read my question, I have improved the specifics of my question: I have a project in which I cool a very low power Peltier device (none of this ...
0
votes
0answers
62 views

Which oils can be used for submerged electornic cooling? [duplicate]

I want to try submerge computer cooling. In many places I found info that oil Crystal Plus 70T is often used for such task. I want to find more alternatives. Which regulations or requirenments oil ...
1
vote
0answers
349 views

DIY PWM Fan Controller; Speed changing too fast

I couldn't think of a way to explain all this in one line, so apologies for the slightly vague title. I've built a PWM Fan Controller for a DIY Laptop Cooling Pad Project. It theoretically works, and ...
0
votes
1answer
39 views

Fan controlled By heat. [closed]

I need to make a computer fan powered by 12v that turn on when the heat is like over 40 degree and to power off if the heat drops down. I asked in many Facebook pages and some told me i need a ...
12
votes
5answers
1k views

Enclosure best air flow profile

I'm in final step of a project an I need some advice about what heat evacuation profile should I use to place three fans for cooling, I have four alternatives as shown in the diagram but I don't know ...
4
votes
2answers
1k 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 ...
0
votes
1answer
89 views

At which set point (frequency) will a VFD dissipate the most heat? [closed]

On a typical application for a variable speed centrifugal pump, at which percentage speed setting will the VFD dissipate the most heat, in other words have the highest losses?
10
votes
4answers
1k views

Determine whether chassis is a suitable heatsink?

I picked up a sweet little aluminium box for a small USB powered DAC project... ...and while putting it together I noticed the side panels of the box were very cool to the touch, and made of thick ...
2
votes
3answers
2k views

How Long Will This Battery Keep My Fridge Powered For?

I have an interesting mathematical/electrical dilemma and I'm not sure where to start. I am considering buying this fridge (specs on page). I will be hopefully buying a battery pack with it to ...
0
votes
1answer
59 views

Effect of cooling a DC power adapter with too few amps?

I have a device (PC fan) which wants 2.0 amps, and a DC adapter that supplies 1.8 amps; both 12v. As I understand it, using this adapter will cause overheating and reduced voltage. My probably-...
-4
votes
2answers
833 views

reducing temperature of drinking water from 10c to 5c in 90sec using Peltier module. I have no background in physics so please talk simply [closed]

Right straight up I have no background in physics. I need to cool drinking water 1000ml in 90 seconds. I would like to cool the water to approximately 5c +/- 1c. The temperature of the water before ...
1
vote
3answers
331 views

Making Hot and Cold room at the same time with Peltier stack

I am thinking about 2 small boxes with peltier stack middle of them to get a cold room and hot room at the same time. Is it possible to get -40 degree celsius cold room and 100+ degree celsius hot ...
-1
votes
1answer
293 views

Peltier heat-pump, insulation between hot and cold chambers [closed]

I have made a decent heat pump, with 4 x peltier elements each at 48W. Each element will be switched with a separate relay. I will later install DS18B20 sensors in the heatsinks, embedded in thermal ...
2
votes
3answers
124 views

Cooling circuits in a hot loft with dusty air and bugs

I have a home-made home-automation system that includes a CCTV unit, circuit boards for controlling PIRs and outside lights, a UPS and power supplies. In the summer the loft gets hot (>40C) and the ...