Questions tagged [cooling]
The cooling tag has no usage guidance.
130 questions
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Heat transfer Calculation, for Cooling for an aluminium box
To go into more detail, I basically have a controller and its housing is basically an aluminium box that I need to add heat sinks to. But first I need to calculate how much heat is being dissipated by ...
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Cooling system design of a heavy duty truck
I'm looking for information pertaining to the design of an engine cooling system in a heavy duty truck -- one that's used for long haul shipping. I've found some resources that provide details on the ...
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How is heat transfer calculated for an aqueous salt solution?
I am familiar with using $\dot{Q}=c_p\cdot\dot{m}\cdot\Delta T$ to calculate the heat transfer rate of a fluid given a singular value for specific heat capacity (such as with water), but how do I go ...
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Liquid cooling system for Emrax 208 motor
I am on a student design team planning to build an electric motorcycle and we are planning to use an EMRAX 208 motor. We want to have liquid cooling for the motor but I cannot find any resources on ...
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Motor part winding start
I have a BITZER compressor type 4GE-23Y-40P, with a part winding start option
Nennspannung = nominal voltage = 380-420
Frequ = frequency = 50
Betr. strom = maximal operating current = 43.9
...
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Why do a swamp cooler and dehumidifier effectively cool a room when paired together in an enclosed space?
I've read in more than one place (e.g., here and here) that a swamp cooler (a.k.a., evaporative cooler) can be effectively paired with a dehumidifier to cool an enclosed space, but this makes no sense ...
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If you have a small fan that blows hot air, and a larger fan that blows cold air against it, what happens to the hot air?
For context, I have a laptop that has a fan that sucks in cold air from the top on the left side (for cooling the cpu), and a fan that blows hot air out the bottom on the right side (for cooling the ...
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Do the tubes of an automotive radiator flow in parallel or series?
The radiator in my car is damaged. One tube has a severe gash in it. I need to drive the car about 100 km before I can get a replacement radiator installed and coolant drains too fast to reasonably ...
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Are there differences between Ice Packs?
My girlfriend will get a refrigerator from the landlord, but right now she hasn't one. But she has a freezer. So we will get ice packs (images: 1, 2, 3) and use a cooling box for the time.
Now I was ...
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Has anyone built a heat powered vapor compression cooler?
I've had this idea in my head for a refrigeration cycle which is powered by heat, uses only one fluid, and whose only moving part is the fluid.
I would like to know if my idea is new, or if it's ...
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Efficiency loss for a cooling element for cooling parts smaller than the cold plate
I would like to cool a small device, with a size of 45x45 mm² and a thermal load of ~40 W. Currently, I have a cooling system available, capable of cooling a thermal load of 52 W, and a cold plate ...
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How can Geothermal heat a home using the ~55 degree heat source of underground to a more usual 72 degree inside temperature?
It has bugged me for a while. If the earth is a constant 50-60-odd degrees several tens of feet beneath ground, and houses (I assume; ours at least does) don't drop down to lower than those ...
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BLDC Motor underwater ; weird behaviour
I recently was riding my e-bike (with a bldc hub motor) and decided to cool the motor (it -the stator- was approx 100-150 celcius I think) in the river.
The controller is on the top of the bike and ...
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How does the Xbox Series X "Heat-sink chassis" work?
I understand what a heatsink does, but I cannot wrap my head around how the newly announced Xbox Series X's heat-sink chassis works. From Xbox:
Heat-sink chassis
A heat sink is a non-electronic, ...
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Building a cooling system for a kneading machine?
I wanted to modify my kneading machine. In fact it can work for at maximum 5 minutes, and then I have to let it cool for 20 minutes (it is a very cheap model), and it is a problem for me.
So I was ...
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Energy/Efficiency Calculations for Large Multi-stage Package HVAC
I frequently use the Equivalent Full Load Hour (EFLH) estimation method to calculate the expected energy usage for commercial HVAC equipment. While not ideal, it works well enough to given an order ...
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Estimating rate of drying by comparing identical process with different ambient humidity
We have a drying process where we take a thin bread product and cool it in a room at 11 C and 90% relative humidity. The product comes in at 80 C and comes out at 22 C. There is air blowing across the ...
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How to dump moist air without heat backflow in evaporative cooling system?
I'm looking to design or purchase an evaporative cooling system for a small 70ft^2 California dorm room without air conditioning. This room has a single window and door to a large common space with a ...
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Cooling tower for nuclear power plants
Cooling towers for nuclear power plants often have the shape of a hyperboloid. At first glance, I thought that an obvious reason for this would be the smaller sectional area, meaning the tower would ...
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Cooling Down Fridge Encased in wooden box
I'm currently working on a project which involves a small fridge encased in a wooden box. It's designed for hotels and the boxes vary slightly, but one common trait is that the box has an open vent ...
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How to achieve successful Peltier cooling
I'm using a TEC12706 Peltier module for making a cooling setup. The hot side rejects heat to a Cooler Master Hyper 410R cooler and the cold side fin gets cold enough to form water condensate on itself....
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How effective will a cooled mattress be for cooling down a baby?
I'm trying to make a cooling device to used in hot areas for cooling down newborns. I'm planning to cool down the mattress to a temperature of 37C, how effective will such a system be to keep the body ...
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How to calculate adiabatic air temperature loss caused by increase of humidity?
I'm searching for an approach on how to calculate the adiabatic temperature loss of air when increasing its humidity by a humidifier.
Assumed we have the following setup:
Air measuring position 1 (...
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Can I oversize my air conditioner if I use a two speed compressor?
The upper floor of my house has a split A/C, three-ton. When the temperature gets up above about 95 Fahrenheit, the unit can't ...
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Developing a model of rate of cooling of steel tube in air
I am trying to develop an equation to determine the cooling rate of a steel tube in air. I'm using Fourier's Law, Stefan-Boltzman Law, Newton's Law as well as the specific heat capacity equation. The ...
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Absorbing heat from a surface
I have a cold body of constant temperature A and a hot surface several times it's area. What is the best way I can absorb the heat from that surface using A. Will sheets of metal like alluminium or ...
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Air Cools As It Expands
What is the degree of cooling caused by air flowing from smaller diameter into a large diameter? How much does air cool as it expands?
If the air inlet was the biggest hole on the right and the ...
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Peltier Element - Segregation of the Hot/Cold
Referring to this diagram:
How does the height of the P and N components affect heat or cold generated on this thermoelectric element?
The idea I keep having is that it seems like the hot and cold ...
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Variables Relating to Atmospheric Water Generation
I am interested in discovering a method to relate air flow to temperature reduction efficiency.
The purpose of this is in application to atmospheric water generation.
The apparatus will involve a ...
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Exiting air temperature in direct evaporative cooler vs cooling tower
In a direct evaporative cooler, dry air is passed by a water reservoir to evaporate water into the air, causing the latent heat of vaporization to be absorbed from both the air and the water; this ...
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Calculate amount of evaporative coolers needed to cool down an area
I have a task to create a software that calculates how much evaporative coolers are needed to maintain a certain temperature in a given room. I need to create a simple form, where variables are next :
...
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How to determine optimum chilled water outlet temperature?
We have water cooling chillers and crahs in our data center. What I want to learn is what will happen if I increase the chilled water temperature. For example, the indoor units (CRAH) set temperature ...
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What is the cheapest and easiest way to cool 2 liters of water without using ice or a fridge? [closed]
Working on a new prototype and I would need the answer to this:
What is the cheapest and easiest way to cool 2 liters of water without using ice or a fridge?
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Designing a Chilled Process Water System for Small Plant
I am designing a new, closed loop,chilled water system for our small injection molding outfit and can use some help where to begin. Here are some of my knowns:
Northeast NJ, USA, no air conditioning. ...
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How can I develope a water loop cooler system sustaining with liquid nitrogen? [closed]
Water will be circulated in the water pipe and liquid nitrogen tanks heat going to cool the water pipe,by the way to the water too. And fan is going to blow this cold air and heat is going to be ...
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Ventilation requirements of a closed housing of a video wall
Our company builds rather large video walls that are driven by computers next to them. In one of our current project the size of the installation is 21 55" displays side by side in portrait mode and 4 ...
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is it possible to use copper coil instead of pads in air cooler [closed]
The pads are used in air coolers to cool the air but make it more humid.
Is it possible to use copper / aluminum coils instead of pads to get cold and dry air?
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Can I keep hardened steel cool with ice while welding?
I would like to weld a piece of hardened steel but i don't want to ruin the treatment on the tip of the piece.
Can i put some ice in the middle of the shaft so the heat generated from the welding (...
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Use two passive CPU coolers on one single CPU?
I aim on building a silent, completely passively cooled PC, with no moving parts at all (I am aware that it is cheaper to go for an inaudible computer instead, using low speed fans. This is not the ...
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Lubricant fluid and Rubber compatibility
I have a portable band saw, which I plan to add lubricant fluid to (this is getting ahead of myself, as I haven't even constructed a portable band saw stand). The main problem with this and the reason ...
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Cooling with fans in narrow space
I'm building a LED ceiling lamp. The idea is to mix different tones of white to get desired tone.
It will initially have 120W LEDs and maybe more later
It will probably never run at full power but I ...
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Do 36 inch diameter fans exist that push 25,000 CFM?
I own a warehouse that needs to push 25,000 CFM. I currently have an old warehouse exhaust fan that doesn't push anywhere close to this. The diameter of the fan blade is about 36 inches, but the ...
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How to cool down a warehouse?
I have a warehouse ( 36m x 14.4m x 10m ) that I want to keep it under 30 degrees Celsius but everyday the temperature will goes above that. It has two turbine ventilator that I don't know the ...
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Choosing sides of a shell and tube heat exchanger for oil cooling
I recently took a quiz from POWER magazine that asked the following question:
In a typical cooling system for lubricant oil in a gas turbine, which configuration is preferred to prevent leaks and ...
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Is circular water cooling reliably more efficient than static air cooling?
I'm looking into developing a system that supplies wasted heat of the transformer of my aquarium LED light (which is always quite) to the aquarium water in order to save resources. The heat which is ...
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Temperature dependent electricity consumption of HVAC System
I am trying to figure out if there is a decrease in electricity consumption of a cooling unit if the ambient temperature decreases from 35°C to 20°C. More detailed, a company is planning to install an ...
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Cooling a small high-power device
I have a small device emitting up to ~90 Watts thermal power over a surface of 2x2 square centimeters. What is the best way (both commercially and DiY) for keeping the temperature of the device ...
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can we run rotary compressor of Air conditioner with different frequency level ? [duplicate]
I am working on split type AC compressor. I actually want to know, if i changed the frequency of the compressor to run on different power level, will it affect the life of the compressor. My actual ...
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Window mounted split air conditioner
I was wondering if there are any window mounted split air conditioners in US market or anywhere else - One in which compressor and radiator hang out of the window and only evaporator is inside the ...
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How to estimate cooling time of pipe due to inner flow (instationary heat transfer)
I have to determine the cooling time of a pipe from its initial temperature $\vartheta_{\text{wall,}1}=500 \text{ °C}$ to the temperature $\vartheta_{\text{wall,}2}=150 \text{ °C}$. The cooling ...
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