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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1answer
321 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 ...
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0answers
953 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-...
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2answers
3k 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 ...
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2answers
176 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 ...
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2answers
665 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 ...
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1answer
446 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 ...
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1answer
48 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 ...
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6answers
11k 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. ...
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3answers
919 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 ...
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2answers
273 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)...
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1answer
565 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 ...
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3answers
2k 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 ...
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2answers
519 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 ...
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0answers
1k 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 ...
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1answer
1k 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 ...
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1answer
108 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 ...
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0answers
655 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 ...
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1answer
50 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 ...
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5answers
2k 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 ...
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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 ...
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1answer
124 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?
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4answers
2k 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 ...
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3answers
3k 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 ...
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1answer
65 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-...
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2answers
2k 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 ...
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3answers
530 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 ...
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1answer
603 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
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3answers
145 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 ...
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1answer
70 views

Viability for thermoelectric cooling in a computer setting

I have a very powerful server computer that needs to be running 24/7, and the twin watercooled (with multiple fans) CPU is still overheating largely because the room it's stored in gets quite hot in ...
14
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3answers
3k views

Is it a good idea to use a single heatsink for two IC's?

I am using a 7805 IC along with a diode bridge Br805D (bridge rectifier) IC on a general purpose PCB, with a 220V / 50Hz AC input. Both the components tend to heat up really quick and I plan to set ...
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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 ...
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2answers
2k views

How to calculate heatsink requirements? Explanation of the K/W unit

I'm planning to make a power supply with the LM2596 (adjustable voltage variant). In the datasheet I read that efficiency for VIN=12V, VOUT=3V, ILOAD=3A is 73%. That means, if I'm not mistaken, that 3 ...
21
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5answers
6k views

If the silicon wafers from which the processors are made are so sensitive that workers wear special suits how is delidding a processor possible?

I saw many videos on YouTube in which people delid processors and then apply better liquids for cooling the processor. Example: i5 & i7 Haswell & Ivy Bridge - FULL Delid Tutorial - (Vice ...
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1answer
321 views

What will happen if I drive 2 TEC-12715s and 2 CPU fans off a 12v/30a power supply?

I'm planning an addition to my liquid cooling system for my computer. I would like to use two TEC-12715 peltiers, which pull up to 15a @ 16v, and two CPU fans, probably pulling around 5W total power. ...
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1answer
309 views

How much difference do peltier units have

I recently bought a 6 can fridge cooled with a tec1-12705 unit, meaning the current rating is 5 amps. It gets about 7 degrees C inside the fridge and I want to upgrade it. I've been searching for a ...
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1answer
2k views

Use single heatsink for muliple MOSFETS

I'm using 3 MOSFETS in a circuit due to the large currents flowing through these MOSFETS. I want to use one big single heatsink for all instead of 3 separate heat sinks. This is because at ...
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1answer
1k views

What is the exact type of oil used in immersion cooling of electronic devices such as processors?

I am looking for cooling solutions for a data center with low PUE. I can see that there is an immersion cooling option which uses a very specific oil based liquid that is non conductive but can ...
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1answer
4k views

Peltier hot side cooling

i am trying to make a peltier powered mini fridge and i am having some trouble getting it to get to the temperatures i want. First of all, some info. I am using a Cooler Master T4 as the cooler for ...
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1answer
84 views

Peltier inquiry

With availability for high powered Peltier thermoelectric heating / cooling I'm inclined in a cooling design incorporating them. Being first time incorporating the same I'd like more understanding and ...
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3answers
622 views

Adding capacitors prevents car peltier cooler from making low battery light flicker, but why?

I have a Black and Decker Heater/Cooler that I want to use in my Camper as a little drink caddy for in front of my Futon while I have company over and we are playing games, and I just switched to a ...
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0answers
173 views

Copper sheet thickness to use between Peltier and CPU

I'm going to use a TEC-12726 (50mm by 50mm, 240W QMax) to cool an FX-8120 (40mm by 40mm, 125W TDP) CPU, and I want to use the full size of the TEC by putting a sheet of copper between the CPU and TEC, ...
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1answer
22k views

Never put anything on top of the fridge? [closed]

I've used several fridges (refrigerators) whose manuals say something similar to Never put anything on top of the fridge. The manuals don't explain why things should not be stored on top of the ...
3
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3answers
3k views

Cooling an outdoor electronics enclosure

I built an outdoor enclosure which contains electronic devices (cable modem, router, battery backup, MCU, etc) for a long-distance internet connection. The enclosure is made of insulated metal panels ...
2
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1answer
3k views

Blower (Fan) Capacitor on Water Cooler

I've got a water cooler that has a centrifugal blower inside it. The blower fails to start most of the time, but I've verified that the motor works because it starts with a slight nudge. A slight ...
3
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2answers
4k views

Small DC motor Heating up!

I am just trying to build a small fan to keep my Mac a little cooler from outside. So I have this little Box Design I made. Now, I'm a total noob at this thing so I need beginner level help here. I've ...
14
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5answers
15k views

What's needed to put a PC fan into reverse?

I've got a PC fan here (I've peeled off a sticker). And although this one doesn't come with the usual 3 or 4 wire connectors, it has enough electronics in it to only operate when power + is on red, ...
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1answer
381 views

Is it possible to drill through a peltier?

I want something like this: But I don't want to pay 30 bucks (USD) for a single peltier. Can I just drill a normal one?
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3answers
18k views

Use Peltier Cooler for effective Air Cooling?

I am using 4 TEC1-12706 thermoelectric cooler on a suitcase, by cutting 4 holes to fit these through and sealed them. All of them are connected to 12V DC supply from a SMPS and each of them have ...
1
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1answer
158 views

Cooling a 2,000V laminated steel transformer?

I have a 2,000V laminated transformer, I use it for high power applications, it gets hot quickly. I was thinking of cooling it with distilled water or mineral oil, but can't think of any decent way to ...
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1answer
530 views

How to remove heat from a body and cool it below room temperature?

In college I was told that we can heat a metal sheet if we pass enough current through it (Eddy currents). But is it possible to somehow cool an object (metal sheet) using some circuit? The ...