Re: Screw Compressor Work Done
Dear prash1820
0.504 kg/sec equals 0.504 * 1.2 = 0.6048 m3/sec
is 605 lts/sec
is 36.29 m3/min
is 2177 m3/hr
Intake pressure 1.025 bar(absolute)
Outlet pressure = 10.2 bar(absolute)
Pressure rise = 9.15 bar
From the link :
http://productpagesct.atlascopco.com...=ZZ&Category=1
you can select an Atlas Copco compressor:
GA 315-VSD-10
710 ltrs/sec
10 bar
290 kW
For the outlet temperature, you can select an air cool dryer.
Easy as that
It is an oil screw compressor with after cooling and of course an oil separator.
For an oil free compressor you will need a multi stage setup. (also possible)
success ■
Teus
Re: Screw Compressor Work Done
hey thanks a lot for the suggestion.
just wanted to know the equation to find out the power required for the above specifications given. ■
Re: Screw Compressor Work Done
Dear prash1820,
The thermo dynamic calculation should be with a compression exponent close to isothermic (internal cooling by the oil) plus auxiliary power requirements.
As this is common practice for compressor manufacturers, it is best and the easiest way to leave those precise calculations to them.
Keep in mind that there are more suppliers, but they all have to obey the same rules of physics.
take care
teus ■
Teus
Re: Screw Compressor Work Done
Hello,
as usual Teus has made great suggestions. Please find attached a line up of standard oil free compressors that may be of help in your design phase. The options of so called "plant air" type 7-10BarG compressors is overwhelming, e.g. Boge and many, many more. Pick one you trust and that can supply this level of technical know how and ask them for the engineering details.
Attachments
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Re: Screw Compressor Work Done
thanks a lot sir...
i wanted to install an air heater . the required temperature output i want is 450 degrees. how many kW of air heater should i use? ■
Re: Screw Compressor Work Done
Dear Sir,
would that be 450C or F? Either way, if you chose an oil free compressor you could eliminate the after cooler which would render an outlet temp of 200-250C and you would reduce the amount of heat you would have to introduce to your air stream. ■
Relation Between Built-In Volume Ratio And Specific Power
The thermo dynamic calculation should be with a compression exponent close to isothermic (internal cooling by the oil) plus auxiliary power requirements.
As this is common practice for compressor manufacturers, it is best and the easiest way to leave those precise calculations to them.
Keep in mind that there are more suppliers, but they all have to obey the same rules of physics.
take care
teus
SIR
i want to know the relation between built in volume ratio and specific power for a screw compressor.
im doing a project on 5/6 dry crew compressor ad is planning to optimise the built in volume ratio
Photo added by Administrator as an example only:
Re: Screw Compressor Work Done
A screw compressor is operating at the highest possible energetic efficiency when the outlet pressure matches the internal compression ratio.
(actual compression ratio = internal compression ratio)
The screw compressor compresses then adiabatically.
When the screw compressor is operating at a higher or lower actual compression ratio, the compression diagram is then completed with a isochoric compression or expansion section, causing a lower energetic compression efficiency.
The internal compression ratio can (only) be lowered by enlarging the outlet opening, which is a job for the manufacturer.
The operating process conditions (mainly the average pressure) have a great influence on the overall energy consumption.
Have a nice day ■
Teus
Screw compressor work done
hello sir,
im working on a screw compressor for which intake is 1.0125 bar and required exit is 10.2 bar with temperature being 27degrees, ie, ambient.and mass flow rate is 0.504 kg/s
with this info i need to find out the work done ..can u plz help me out...its very very urgent! ■