microsoft powerpoint - air receivers
DESCRIPTION
materi mesfluTRANSCRIPT
Marine Engineering Dept.
Compressor
Sutopo Purwono Fitri (Marine Eng. Dept – ITS Surabaya)
MMS [email protected]://mmslab.ne.its.ac.id
Ver. 1.0 09/2012
EAISS2012 2
Marine Engineering Dept.
Air Receiver
• Functions:• Equalization of pressure variation in the supply
lines• Storage of compressed air to meet heavy
demands in excess of the compressor capacity• A source of additional cooling, and a collection
point for residual condensate and oil droplets• Prevention of rapid loading and unloading of the
compressor in short cycle duties
Ver. 1.0 09/2012
EAISS2012 3
Marine Engineering Dept.
Air Receiver
• Storage capacity• Useful storage capacity:
• Volume of free air which can be drawn from thereceiver over the required / permissible workingpressure range
= ×Pa = working pressure, absoluteCo = compressor output
Ver. 1.0 09/2012
EAISS2012 4
Marine Engineering Dept.
Air Receiver
• Storage capacity• Constand demand:
• Volume of air receiver output of compressor (at workingpressure)
• The size need not be proportioned to the output ofcompressor
• Receiver volume matched to compressor= minimum sizerequired (calculated on the basis of compressoroutput/minute)
• Air receiver only operate as a pressure damper to maintainuniform pressure( ) = 6 × ( ) < 9 bar( ) = ( )( ) < 9 bar
Ver. 1.0 09/2012
EAISS2012 5
Marine Engineering Dept.
Compressors Installation
Ver. 1.0 09/2012
EAISS2012 6
Marine Engineering Dept.
Air Receiver
• Storage capacity• Variable demand:
• Larger air receiver volume than compressor output• To adjust demand and damp out pressure fluctuations• V 3 × VR
Ver. 1.0 09/2012
EAISS2012 7
Marine Engineering Dept.
Air Receiver
• Storage capacity• Storage capacity and time over the capacity can
be delivered( ) = . .
Vd = air volume requirement (volume of air drawn)t = time in minutes for air drawning
Ver. 1.0 09/2012
EAISS2012 8
Marine Engineering Dept.
Air Receiver
Ver. 1.0 09/2012
EAISS2012 9
Marine Engineering Dept.
Air Receiver