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Two-Stage Compression Permanent Magnet Variable Frequency Rotary Screw Air Compressor
Two-Stage Compression Permanent Magnet Variable Frequency Rotary Screw Air Compressor
Oil-injected rotary-screw air compressor
Two-stage compression improves the energy efficiency of the compressor. The two-stage compression screw main unit adopts two-stage compression, namely the first stage compression and the second stage compression. After the first stage compression, the oil and gas can be fully mixed between the stages to reduce the suction temperature of the second stage compression, thereby reducing power consumption.
Model 8 Bar | Volume Flow m³/min | Power | Noise | Outlet Pipe Diameter | Overall Dimension mm | Weight | |||||
0.7Mpa | 0.8Mpa | 1.0Mpa | 1.3Mpa | KW | dB | L | W | H | KG | ||
JS-30HP-II | 4.6 | 4.5 | 3.8 | 2.8 | 22 | 68 | G11/4 | 1450 | 850 | 1250 | 580 |
JS-40HP-II | 6.6 | 6.5 | 4.5 | 4 | 30 | 68 | G11/4 | 1600 | 1030 | 1380 | 730 |
JS-50HP-II | 7.7 | 7.5 | 6 | / | 37 | 68 | G11/4 | 1600 | 1030 | 1380 | 780 |
JS-60HP-II | 10.5 | 10.3 | 7.3 | 6.1 | 45 | 70 | G2 | 2100 | 1350 | 1650 | 1200 |
JS-75HP-II | 13.6 | 12.3 | 10.2 | 7 | 55 | 70 | G2 | 2100 | 1350 | 1650 | 1300 |
JS-100HP-II | 16 | 15.6 | 12.8 | 10.2 | 75 | 72 | G2 | 2100 | 1350 | 1650 | 1360 |
JS-125HP-II | 20.7 | 19.5 | 16.2 | 13.2 | 90 | 72 | DN65 | 2520 | 1560 | 1900 | 2550 |
JS-150HP-II | 24.8 | 24 | 20.2 | 15.2 | 110 | 72 | DN65 | 2520 | 1560 | 1900 | 2650 |
JS-180HP-II | 29 | 28 | 23.2 | 18.7 | 132 | 78 | DN80 | 2810 | 1750 | 2050 | 3050 |
JS-220HP-II | 34 | 33.5 | 28 | 23.3 | 160 | 78 | DN80 | 2810 | 1750 | 2050 | 3650 |
JS-250HP-II | 39 | 38 | 33.5 | 27.7 | 185 | 78 | DN100 | 3420 | 2190 | 2250 | 4750 |
JS-280HP-II | 43 | 42.5 | 38.3 | 33.3 | 200 | 78 | DN125 | 3420 | 2190 | 2250 | 5050 |
JS-300HP-II | 51.5 | 47 | 42.4 | 38.3 | 220 | 80 | DN125 | 3420 | 2190 | 2250 | 5300 |
Unique Variable Frequency Control technology
The rotor speed is continuously adjusted within a large range of large rotor low ratio power, automatically matching the changes in gas volume at the gas consumption point, and the pressure fluctuation is controlled within ±0.01MPa; there is almost no energy loss caused by pressure increase.
It saves 45% of no-load power consumption to reduce the energy loss caused by no-load state.
High-performance Variable Frequency Device, small starting impact, avoiding starting overload.
Specially designed VFD control cabinet, large size, optimal ventilation design, the ambient temperature reaches 45C and the performance is still running.
An example of energy saving of permanent magnet synchronous inverter(PSMI) on rotary-screw air compressor: The average gas output of a 37KW ordinary screw air compressor is only 75% of the rated exhaust volume.
Note:The model purchased by the user can produce 6 cubic meters of gas,but the actual average gas consumption is only 75% ,that is about 4.5 cubic meters.If it runs 6,000 hours a year,and the electricity fee is counted by kW·h.
The calculation is as follows:The ordinary machine will produce three losses:
1.No-load loss, 2.Pressure difference loss. 3.Motor efficiency loss.
It is well known that the 37-kilowatt ordinary screw compressor has an inherent service factor of 1.2. 37 kilowatts actually refers to the output shaft power (actual load power),and the unit input power should be about 45 kilowatts!
No-load loss energy saving formula:
No-load loss = 25% unloading time x no-load current loss ( 45%)
No-load loss = 0.25x (0.45x45x6000)= 30375kW·h/year
Pressure difference loss energy saving formula:
Pressure difference loss = 75% loading time x 2 bar pressure difference loss ( 14%)
Pressure difference loss = 0.75x (0.14x 45x 6000)=28350kW·h/year
Motor efficiency loss formula: 37KW permanent magnet motor efficiency is about 5% greater than the efficiency of ordinary induction motors.
Motor efficiency loss = 45x 6000x 0.05= 13500kW·h/year
Total electricity savings = 30375 + 28350 + 13500 = 72225 kW·h/year
The power consumption of an ordinary compressor = 75% (loading time)x 45x 6000 = 202500kW·h/year + 25% (idle time)x 0.45x 45x 6000=30375kW·h/year)=232875kW·h/year
Power saving rate = 72225 / 232875≈ 31%
Conclusion: After using PSMI, the electricity bill Is effectively reduced by 31%!
