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Questions tagged [compressed-air]

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Calculate volume of compressed air tank given several variables

For context, I've started drafting an idea for a submarine simulator game, and I want to make as realistic as possible; but this obviously requires doing a lot of math that I'm unfamiliar with. I've ...
Massimo Asteriti's user avatar
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11 views

How to handle air pressure circuit with very different setpoint values

I'm a hw/sw guy, with a very limited knowledge about pressure/pneumatic circuits. For my new job I have to design a closed-loop controller to inflate and maintain two chambers with a given pressure. ...
Mark's user avatar
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I would like to know about the composition of a compressed air system

I am a graduate student and I am planning to conduct high-speed flow experiments using a high-pressure tank. The equipment we currently have is a compressor, air tank, and regulator, and the regulator ...
user43593's user avatar
1 vote
1 answer
89 views

Why are double-acting reciproating compressors more efficient than single-acting ones?

On many websites, I read that double-acting reciprocating compressors are more efficient than single-acting compressors. These sources say it's because they complete two compression cycles on each ...
Daniel's user avatar
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How much air pressure is needed to push liquid out of a tank

I want to use compressed air to push diesel out of a 100 gallon rectangular tank for fueling equipment. Tank is 24” tall with a 30’ 3/4” hose reel on top. Height of the nozzle would be 6’ ft from the ...
Henry Lich's user avatar
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1 answer
212 views

Pros and Cons of Carbon Fibre High Pressure Tank

What are the advantages and disadvantages of using carbon fibre for pressure vessel construction? Carbon fibre has a very high tensile strength and is very light-weight. According to this calculator ...
Yassin's user avatar
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Would there be a flame front in this case of combustion

Suppose a piston enclosing an amount of air-fuel mixture and then this piston compresses the mixture to the point of auto ignition, if every part of the mixture ignite simultaneously is it safe to say ...
user42922's user avatar
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69 views

Atlascopco screw compressor unload abnormal sound

We are facing an issue in our GA 75 FF model compressor. During the unload time the compressor is making some abnormal noise, but during the load it is working fine. When the machine is unloaded after ...
user42477's user avatar
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1 answer
41 views

Piston Compressed Pneumatic Cannon

During an discussion with friends regarding pneumatic cannons, I came up with this gem :). Piston power pneumatic cannon. My friends however, didn't share my excitement regarding this revolution in ...
Haggis2.0's user avatar
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12 views

Does drierite produce particles when drying and filtering compressed air?

I need to dry and filter some air for an air-driven rotary tool. I have an in-line drierite container but wonder if it will itself produce particles. Because of the fittings I have available it would ...
user391339's user avatar
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Opposing orientation of multi-stage particulate filter in Nitrogen separation/purification system

I recently purchased an assortment of parts taken out of a Nano Purifications Nitrogen Generator, one of the parts included was a two stage filter for removing particulates from the air stream. The ...
J H's user avatar
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-1 votes
1 answer
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Why is there a MIN and MAX marking on a car coolant bottle?

This question was initially posted in physics stack exchange, then the mechanics stack exchange but I think it's more appropriate for engineering section instead. I've always thought the minimum and ...
Aden's user avatar
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1 answer
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How long it takes to fill an inflatable to a certain pressure?

I am trying to figure out the inflation/how to calculate the time it takes to fill something to a certain pressure. I have an inflatable dock I am filling with a portable pump. The dock is 7ft x 7ft x ...
nk13's user avatar
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1 answer
121 views

Can Vortex tubes be used in cooling rooms?

Vortex tubes have been used extensively to some extent in cooling small areas. However, can they be used to cool larger rooms. Through some research, I found out that an average vortex tube may take ...
Mythqrss's user avatar
1 vote
3 answers
207 views

Can air compressors be used to boil water?

I was just reading an article about how air compressors can be used as an energy source. As the air is compressed, its temperature increase significantly, and this energy stored as heat can be used to ...
Belal Bahaa's user avatar
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35 views

A 40L compressed air cylinder at 100 bar is emptied in pulses at the rate of 41kg/s. How many such cycles would it take to empty the cylinder? [closed]

I am constructing a blowback gas system where clogged debris needs to be removed with compressed air using compressed air cylinder. 40L compressed air cylinder at 100bar pressure is available as ...
Yadunandan's user avatar
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1 answer
33 views

Pneumatic pressure sensing in a moving air compressor line

I am building an automatic control system for an compressor that stops at a designated pressure. Here's a rough sketch of the system: The compressor should receive the on signal from the ...
Alex's user avatar
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2 answers
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Question about oblique shock and expansion fans

Hi I am an engineering student. I have a question about oblique shock and expansion fans. In my understanding, oblique shock and expansion fans could happen on supersonic airplane foil. But how often ...
jjk's user avatar
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3 answers
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Releasing compressed air with the loudest pop

Due to the dry summer I've been thinking about theory of making cracker/banger without fire. Would connecting a nozzle (de Laval?) to quick release valve from small cylinder with the pressurised air ...
Filip Matyja's user avatar
18 votes
4 answers
5k views

Why are train brakes so complicated?

The concept is simple enough: no pressure in the train line has the brakes locked, full pressure is loose, and partial pressure drags accordingly. So if pressure is lost for any reason, the train ...
AaronD's user avatar
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2 votes
3 answers
118 views

Is there a good way to passively dry air in the input of a vacuum pump?

I'm using an a/c compressor as a vacuum pump for small projects that don't need a good vacuum pump, and I'm looking for a way to dry the air in the input, to prevent water from mixing with the oil ...
user2934303's user avatar
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0 answers
32 views

Air Filtering using a Air Tank

I just got a theory, However I don't know if it would work the way I wanted it to, though I still have hope and want to see if you agree with me. As we all know, CO2 Slowly sinks as it is heavier than ...
Joseph Casey's user avatar
2 votes
1 answer
990 views

Out of the three types of Stirling Engines, which one is the most efficient and delivers the most amount of power?

I was thinking that the beta Stirling engine would be the most efficient as it has a displacer to block heat transfer from the hot to cold regions in between thermodynamic cycles. However, I heard ...
ARJ's user avatar
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1 vote
0 answers
56 views

What's the most efficient air compressor to reliably deliver up to 15 litres per second at 10 bar? [closed]

Suppose I wanted to continuously supply up to 15 litres of air per second, compressed to 10 bar - what would be the most efficient type of compressor, i.e. the type requiring the least energy input in ...
it's a hire car baby's user avatar
1 vote
1 answer
184 views

How to calculate rock permeability in m^2 from gas flux in m/s?

I am studying rock caverns lined with concrete for compressed air storage. I would like to know if it's possible to convert the permeability coefficient from m/s to m^2 or Darcy. Thank you.
Davide's user avatar
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4 votes
3 answers
446 views

Specific heat at constant volume used in non constant volume processes

I have commonly seen that the work for an isentropic compression is written as: $$ W_{in} = c_{v}(T_1 - T_2) $$ What confuses me is that since it is a compression (volume is changing) why do we use ...
RMS's user avatar
  • 275
1 vote
1 answer
753 views

Is using your mouth and lungs to blow away dust inside your computer somehow bad for the computer?

Bottles of compressed air are very expensive where I live. While it would be nice and ideal to have and do a "proper" cleaning, I've always used my mouth and lungs to blow air onto the dust ...
D. Madrueno's user avatar
0 votes
0 answers
73 views

Is there a miniture atmospheric water vapor condenser?

I am looking to add a condenser for a plant preserving container. The plants need water and I was wondering if I can have a passive method to condense atmospheric moisture to water. My container is ...
Anwar Elhadad's user avatar
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0 answers
24 views

Can't Find Regulator for 16G CO2 Cartridge (800 PSI to 400-200PSI)

I am trying to make a Paintball Gun that works off of 16G CO2 Cartridges(800 PSI). I can't find a compact regulator that drops 800 PSI down to 400-200 PSI. If anyone knows of such a regulator could ...
user29946's user avatar
1 vote
0 answers
31 views

Why does use with air or water reduce the maximum temperature of certain high temperature / pressure hoses?

This example is a Parker Hannifin model 426/436 "SAE 100 R1 AT / SAE 100 R16 High Temperature Hose". Here are the temperature specifications: (Full data sheet) Although there is an asterisk ...
StayOnTarget's user avatar
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1 answer
158 views

How to make a 500+ psi water gun staff

I would like to create a life size lego Bionicle Aqua axe(gali nuva Type or gali master of water Type). The problem is unlike The trident in this video: https://m.youtube.com/watch?v=NK6MWt7vpVE&t=...
user29142's user avatar
0 votes
2 answers
78 views

What is the maximum temprature that could be achieved by compressing air?

We know that compressing air produces heat but is it possible to achieve temprature of 700degree C just by compressing air. If not what will be the maximum temprature that could be achieved?
Tank's user avatar
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2 votes
1 answer
484 views

Why air compressing mechanism "Trompe" is not popular in usage?

I was amazed when I got to know that there is such a simple mechanism know as Trompe to compress air. It has no moving parts which make it cheap to construct and do not require any servicing. Even the ...
Tank's user avatar
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2 votes
1 answer
58 views

Slow Driving an Air Compressor

Do off-the-shelf air compressors have minimum driving speeds, below which they cannot build the necessary pressure? Reciprocating compressors and scroll compressors are available—is there a difference ...
PProteus's user avatar
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0 votes
1 answer
370 views

Why do high pressure multistage air compressor have different piston diameter sizes? [closed]

I meant like this kind of compressor https://www.bauer-kompressoren.de/fileadmin/_processed_/csm_compressor-block-junior2_b92a76a02e.jpg also would the compressor reach high pressure if the diameter ...
richardo tong's user avatar
-1 votes
3 answers
3k views

Is it safe to use a 125PSI rated auxiliary air tank with a 150PSI air compressor?

I have a small, 5 gallon, pancake compressor which has a maximum 150PSI rating. Unfortunately, it doesn't have the air capacity to power the demands of an HVLP paint sprayer or a die grinder without ...
user148298's user avatar
-1 votes
1 answer
55 views

How to decrease Nitrogen gas consumption in Iron & Steel Plant? [closed]

I need to decrease nitrogen gas consumption in iron & steel plant. Currently it's not possible to measure every dot from steel mill to determine real usage so they use what air separation unit ...
chemeng10's user avatar
-1 votes
1 answer
476 views

Is it possible to connect a car air compressor to a blow out gun?

I have a compressor with this type of outlet: I am not sure how it is called, but it works for my bicycle and car. Then I have a blow out gun to clean electronics by a stream of compressed air. The ...
Martin Drozdik's user avatar
0 votes
2 answers
180 views

Regarding design of a compressed air delivery system based on a screw air compressor

I want to select a screw compressor for my application wherein I need a pressure of about 18 psig, and 300 cfm at the aforementioned pressure. The compressors I'm finding suitable for the system have ...
afterburner77's user avatar
-1 votes
2 answers
186 views

How far can we compress air manually?

I am not sure if such devices even exist, but I'm sure we can improvise. A device in which we could (manually) turn a shaft, screw a screw, or hammer an air-tight follower into a strong walled ...
El Flea's user avatar
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1 vote
1 answer
39 views

Cumulative effect of two axial fans

If I already have a small DC axial 2m3/h fan blowing air at something, what will happen if I add a larger more powerful 6m3/h DC axial fan blowing from behind that one (i.e. its the larger fan first, ...
Oliver Walters's user avatar
1 vote
1 answer
23 views

How do cavity resonators differ from tubes of uniform width?

I read that wine bottle produces sound when u blow sideways onto its rim because some frequencies of the white noise produced in your mouth gets amplified when they match the natural frequency of the ...
never took courses but why's user avatar
1 vote
2 answers
130 views

How can I build a regulated pressurised air supply?

I need a source of air pressure for an air bearing (3D printed cylinder that expands air upwards like an air hockey table). I would like to be able to control the flow of air. I don't have a lab air ...
555's user avatar
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0 votes
0 answers
258 views

Using one electrical pump for multiple hoses

I'm currently trying to figure out a cheap way to build a cocktail machine. For now the machine should have about 20-30 possible input liquids. These liquids should remain in their original bottle ...
Forivin's user avatar
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0 answers
37 views

Are we capable of building bigger high pressure cylinders?

Check out this 200-300 bar cylinders: Is it practically possible to build a bigger cylinder of say: 10m x 1m - and make it hold a pressure of ...
AIon's user avatar
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0 votes
2 answers
124 views

What is the idea behind an expansion valve?

I am watching this video(https://www.youtube.com/watch?v=gVLhrLTF878) and beginning at around the 2:20 mark, it explains the significance of an expansion valve with the following ideas: Restricts ...
TheLast Cipher's user avatar
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0 answers
36 views

Do companies recover CO2 and water from the purification step of cryogenic air separation, and how?

In the 3rd step of cryogenic air separation, filtered air is purified to remove water, CO2, and hydrocarbons from the N2-O2-Ar stream. Im interested in knowing what happens with that CO2 and water. ...
dlight's user avatar
  • 109
1 vote
2 answers
254 views

Compressing gas with liquid

This question, in short, is: Can a gas be compressed with high pressure liquid? As a scenario, imagine a tank full of atmospheric gas at STP. Could something like a pressure washer pump (in this case ...
Gabe's user avatar
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0 answers
62 views

Force of Jet from Air Compressor

I want to use a compressor to create a jet of air. At discharge from compressor how much CFM (Cubic Feet per Minute) are enough to create a force that can turn a heavy object (say 40 kg) at 3 rev per ...
Rehan Jamshed's user avatar
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0 answers
34 views

Is this is a valid estimation for the mass flow required for Hyperloop air-bearings?

In Hyperloop air bearings, the air escapes through the rear cross-sectional area of each ski, you know? Yes, there is a pressure differential, but the air comes out of the skis, crashes into the tube ...
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