Why we need a seal oil system , the Mechanical Seal is it enough to do the sealant ?
the rpm is to high to use mechanical seal
options are gas seal or oil seal
Why we keep it above the suction pressure not the discharge pressure?
because normally a compressor is designed to have suction pressure...
as opposed to an oil seal?
if you have a N2 grid available then I would go for a gas seal (opex=N2 usage and maybe requirement for flare connection depending on procesgas pressure)
oil seal might be a bit more capex intensive and maybe some opex for degassing oil equipment
it is not that easy:
off coarse there is the basics:
gas outside of tube,liquid inside the tube (gas opposes the biggest heat transfer resistance,therefore on outside of tube, biggest contact area)
inside the tube:
boundry layer (google suggestion):a film of liquid in contact with the tube...
I dont think the problem lies with how to connect PLC from supplier A to SMC from supplier B
build up your knowledge:
1 set up SMC with motor,power supply and laptop (with SMC programming software):build up some confidence in how the SMC works
2 figure out how the programming of the SMC works...
normal operation:upstream pressure increases,control valve opens (dumps the pressure)
the pressure measurement only sees pressure,the valve operation only does what it is designed to do
so if pressure rises as a result of pressure rise downstream, the valve opens
to calculate based on operating parameters:inlet pressure/temperature,outlet pressure/temperature,torque measurement,RPM,tensile strenght of shaft and its dimensions (to convert torque measurement to kW)steam tables/mollier diagram, understanding of basic thermodynamic cycles
to calculate based...
I would go with the little inch solution and either control the number of strokes or strokelength (pneumatic actuator,4 2 control valve,lineair position electric feedback,cheap PLC)
above certain pressure N2 will dissolve in barrier liquid and might cause foaming, therefore separation of barrier gas and barrier liquid by means of bladder/piston
possible causes:
hanging of seal (can be observed if seal is renewed) investigate old seal, look for carbon deposits
is seal buffer tank connected to N2 net? any process parameters available (pressure buffer tank constant?)
since you running back en from a storage tank, adding a cooler to the filtration unit makes it heat neutral.I am not familiar with your type of filtration unit, does it boil out water under vacuum (vacuum chamber/ejector)?if so you need to heat up the oil to about 80degC, storing oil this hot...
