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Questions tagged [cooling]

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0
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1answer
37 views

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 ...
0
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1answer
25 views

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 ...
1
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1answer
15 views

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 ...
2
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1answer
41 views

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 ...
2
votes
1answer
39 views

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 : ...
0
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2answers
49 views

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 ...
-1
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2answers
34 views

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?
3
votes
1answer
57 views

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. ...
1
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0answers
25 views

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 ...
1
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0answers
20 views

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 ...
-1
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2answers
36 views

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?
0
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2answers
107 views

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 (...
3
votes
1answer
98 views

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 ...
0
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1answer
33 views

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 ...
0
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0answers
29 views

Best model to describe this scenario of cooling?

I have a block of CFRP (Carbon Fiber Reinforced Polymer) that has defects (back-drilled holes) in it. This sample was exposed to a source of heat for sometime (say 30 seconds) and the source if ...
2
votes
1answer
165 views

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 ...
0
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1answer
40 views

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 ...
3
votes
2answers
674 views

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 ...
2
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0answers
72 views

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 ...
0
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2answers
39 views

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 ...
1
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2answers
48 views

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 ...
0
votes
1answer
40 views

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 ...
1
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0answers
14 views

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 ...
0
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2answers
76 views

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 ...
1
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0answers
25 views

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 ...
2
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0answers
65 views

Thermal Conductivity [closed]

So a product of me being a bored mechanical engineering student and my love of camping has prompted me to attempt to make my own Seebeck generator. It will be powered by a simple wood fire in a can ...
1
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1answer
1k views

CFM needed to ventilate a Ethereum mining rig? [closed]

I am planning to deploy two Ethereum mining rig in my store room. Both rigs will have a total of 14 RX 570 GPU's and rest of usual suspects. The GPUs and PSU will be running at full usage while other ...
1
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0answers
124 views

Calculating heat transfer in a cooling loop

Imagine a closed pipe like below, filled with a liquid. The pipe is copper. Then imagine a small point heat source of X watts applied to the outside of the pipe in the position shown. Heat warms the ...
1
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3answers
114 views

Most efficient airflow pattern to cool a recessed shelf

I have a recessed shelf which holds three components that each generate heat: A projector A computer An audio power amp The shelf is located at the top of the wall and open at the front but closed ...
1
vote
1answer
115 views

Is evaporative cooling for a pool effective?

Hot humid east TX; Large subdivision pool is warm ,92F. A plan is being make to cool it with evaportive spray . One data point is : dry bulb= 82.0 , wet bulb = 79.7 F. This is likely typical average ...
2
votes
1answer
807 views

Is a metal Prince Rupert's drop possible?

Can a Prince Rupert's drop be made of metal instead of glass?
2
votes
1answer
585 views

How to design a cooling chimney for a computer server?

I'm building a server type computer consisting of integrated motherboard, CPU, RAM and hard disk. There will also be a standard power supply unit. This is to be a Steam Punked computer, so... I ...
1
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3answers
324 views

Should an auxiliary cooling fan blow air or draw it?

I have a Li-Po battery charger that comes with its own cooling fan which, like most of the cooling fans, blows hot air out of the charger to cool the charger down. I have a spare fan and I was ...
4
votes
2answers
311 views

Can I control latent/sensible heat changes in a counter-flow, induced draft cooling tower using climate?

Some extensive background information to start I'm attempting to reduce water consumption at 25+ production facilities, and I've identified that the largest consumption of water (60+%) comes from ...
-1
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1answer
211 views

Some questions about liquid nitrogen cooling [closed]

I am currently tinkering with a railgun experiment, and I was thinking of using a liquid nitrogen loop to cool the rails down to very low resistance, and inject some nitrogen into the barrel between ...
7
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5answers
4k views

Radiators in series or parallel?

So let's say I have some heat generating machine be it a combustion engine or a fridge cooled by a fluid. I don't have a single radiator that is big enough for the amount of heat being generated but I ...
1
vote
1answer
743 views

How much does an evaporative cooler cool down a room

So I'm trying to create a system that automatically runs evaporative coolers to keep a warehouse at a desired temperature, given the internal and external temperature and humidity. I can get the ...
5
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2answers
568 views

Do heat pipes work in any orientation?

I think I understand how heat pipes work, and thus the following one has me flummoxed:- It's from a typical bulk order Chinese web site, but I've seem many similarly contorted arrangements. They are ...
3
votes
1answer
82 views

How do you actually control the cooling level of AC?

I'm hoping this is a relatively simple question to answer, but I just couldn't find it on Google. With regard to air conditioning (or any cooling system that relies on compressing/evaporating), how ...
1
vote
1answer
45 views

How small can coolers get? [closed]

Ive been wondering about how small of a cooler you can build. Although this probably is just really low-level engineering, i have a rather particular question. For my idea, the cooler has to be as ...
6
votes
2answers
84 views

What's more energy efficient: fewer air conditioners working at max capacity or more working at part capacity?

The central heat and air in the house I'm renting is unable to keep the house below 80 °F during the hot summer here (100 °F days). We've had 3 HVAC techs out to look at it and they all say there's "...
5
votes
2answers
95 views

How effectively would a typical liquid CPU cooler cool a 15“x15”x1/8" sheet of aluminum?

I'm curious about whether a typical liquid CPU cooler (like, e.g., this Corsair H60) would be able to effectively cool a square sheet of aluminum with 15" sides and a thickness of 1/8". I'm not even ...
0
votes
1answer
115 views

What is the most cost efficient way to cool a tank of oil with water?

I have a tank of oil which I plan to heat 24/7 with constant 15 kW. I want to dissipate this energy using water as a coolant. I have the outside unit of an out of order split type air conditioner that ...
1
vote
1answer
108 views

Simulation of Automotive Radiators

I'm going to simulate an automotive radiator . The method called $\varepsilon$- NTU , suggests following steps to calculate the heat rejection,$Q$, of a heat exchanger: 1-calculate $U$(overall heat ...
1
vote
1answer
199 views

Rapid Cooling System for Commerical Freezer [closed]

I have a bit of an ambitious project on hand and was looking for some advice/ideas. My team and I are working on a project that involves retrofitting a commercial grade freezer (model MasterBilt ...
5
votes
1answer
239 views

What happens to silicone gaskets (siloxane rubber) in presence of ethylene glycol?

Normal sealings and gaskets are made from NBR for use in conjunction with aqueous solutions of ethylene glycol which are common coolants for various purposes. However to keep sulphur out of a ...
4
votes
1answer
371 views

What are heat sink options for a circulating-water cooling vest?

I am in a first-year engineering design group where we are in the process of designing a cooling vest for motorcyclists for use in the city (1-2h length). Water will circulate through the vest, ...
3
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2answers
563 views

Why is minimum pressure specified on a PSU water cooling circuit?

I work in consultancy and I am designing a product for a customer. The customer has requested a specific PSU. I have contacted this PSU manufacturer and they request 6 L/min of coolant flow and ...
4
votes
1answer
227 views

How much pipe would I need in the ground to cool an outbuilding?

I want to experiment with geothermal cooling, and have an r-10 insulated workshop which I'd like to cool during the worst of the summer heat this year. The workshop is about 400 square feet (37 m2), ...
3
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1answer
253 views

Ratio between heat transfer coefficient and thermal conductivity

Consider the Robin boundary condition for the diffusion/heat equation $\mathrm{u_t=a(t)u_{xx}+f(x,t)}$: $$\mathrm{-k(t)u_x(0,t)=h(t)u(0,t)}$$ or $$\mathrm{u_x(0,t)+\frac{h(t)}{k(t)}u(0,t)=0}$$ ...