Your current location: 首页 >News center >> Company dynamics >> LD Oil-free screw compressor for Atlas Copco LNG transport ship
Article source:"Compressor netWechat public number, if there is infringement, please contact to delete!
LD oil-free screw compressors and centrifugal compressors are suitable for LNG carrier cargo tank systems to fuel the main engine of LNG carriers while keeping the pressure in the cargo tank within limits。
Atlas CopcoThe Gas & Process Division can provide oil-free screw compressors for this application。
LD oil-free screw compressor vs centrifugal compressor technology comparison:
|
_
|
Oil-free screw compressor |
Centrifugal compressor |
|
Range of regulation |
The frequency conversion speed control mode is adopted, and the flow adjustment range can reach 40-50% under the condition of keeping the outlet pressure constant |
Under the condition of keeping the outlet pressure constant, the adjustment range is about 20%
|
|
喘振 |
Positive displacement, no surge |
Centrifugal, air test requires complex surge regulation
|
|
Arrangement mode |
In the overall skid arrangement, the return valve, the return line and its instrument, the cooler and its inlet and outlet lines are arranged on a chassis |
Semi-skid installation arrangement, the site scattered pieces
|
LD oil-free screw compressor vs. centrifugal compressor operation comparison:
1. LD oil-free screw compressor
All components are integrated into the skid, easy installation, only need to connect the external pipe。Easy to operate, no cumbersome start-up preparation procedures。
The whole unit meets the explosion-proof requirements, the explosion-proof ZONE is ZONE 1, there is no bulkhead wall, and no welding work is required on site。Simplified cargo machine The design of the room saves a lot of construction hours
2、Centrifugal compressor
Need to be installed on site: anti-surge valve, anti-surge pipeline and its instrument, interstage cooler and its import and export pipeline。
The main motor is in the non-explosion-proof area with a bulkhead wall, and welding work needs to be performed on site。
