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KOBELCO - Model Emeraude-ALE IV -Oil-free Compressors
By optimizing energy efficiency throughout the entire system, we have set a new benchmark for specific energy performance in its class. A mid-range model that paves the way for the future with cutting-edge performance.
Class-leading specific power consumption
With specific power consumption as our primary design criterion, we strive to deliver products that maximize energy efficiency for our customers. The integration of ultra-high-efficiency motors and optimized package design has enabled us to set a new benchmark for specific energy performance in its class.
Wide-range control
Wide range control can deliver higher airflow at lower pressure point. ALE IV senses line pressure and automatically utilizing excess power during low-pressure operation efficiently. At 0.6MPa operation, airflow can be increased by up to 10% (75kW).
High-efficient motor (Fixed-speed: IE4, Inverter: IE5 equivalent)
To pursue energy efficiency, we adopt high-efficiency motors. ALE IV fixed-speed models are equipped with IE4 super-premium motors, and inverter models feature ultra-high-efficiency IPM motors which are IE5 equivalent.
Designed high effiiency screw rotors
A new rotor profile has been designed using advanced analysis technology that KOBELCO has fostered in their long history since developing the first oil free screw compressor in Japan in 1956. KOBELCO has achieved class-leading specific energy consumption thanks to the screw rotors which have been designed superior performance.
- Optimization of the inter stage pressure
- Optimization of rotor clearance
- Improvement of shaft sealing structure
Package design for no wasted energy
Internal piping design, high efficiency motors and fans contribute to energy savings. Moreover, gas coolers' optimization decreases the discharge temperature and downsizes auxiliary equipment such as dryers. This leads energy saving of not only compressors but also clean air systems.
Partial-load performance of Inverter model
Inverter model's partial load performance has been improved thanks to IPM motor and superior rotor design. Inverter model supplies required air volume in appropriate power consumption.
Stable pressure control of Inverter model & Energy saving logic of Fixed speed model
Stable pressure control of Inverter model keeps the line pressure lower. And the pressure fluctuation is kept within 0.01MPa. Energy saving logic of Fixed speed model forcibly switch loading to unloading at every capacity control cycle (min 23sec). Excessive pressure rise is eliminated and energy loss is minimized.