PETpla.net Insider 05 / 2016

COMPRESSORS 24 PET planet insider Vol. 17 No. 05/16 www.petpla.net ers, it is a powerful tool for boosting productivity and for achieving even greater energy savings. Sectors such as the food and beverage, pharma- ceutical, chemical, pulp and paper, textile and construction materials industries and applications such as wastewater treatment, pneumatic conveying systems and power gen- eration can benefit from this screw blower technology. The EBS blowers are easy to install, are highly reliable for continuous operation and provide outstanding strength and durability. The screw blowers feature an inter- nal cooling concept that makes the energy-wasting use of an oil pump and oil cooler superfluous. They are designed with an effective sealing concept which ensures sealing over the long-term without the need for a vacuum pump. Dispensing with auxiliary equipment and oil lubrication also increases machine service life and reliability. For optimum cooling, cooling air is drawn in from outside the enclosure, which not only boosts performance. It provides greater usable air-mass flow for the same drive power. Rotary blowers available with Sigma Control 2 Kaeser completes its blower product portfolio with the BBC and FBC series. These compact rotary blowers could be connected with integrated mains power supply equip- ment and the proven Sigma Control 2 controller for comprehensive system monitoring and communication. The internal Sigma Control 2 controller makes blower mode selection, such as remote speed control or pres- sure control, by pushing a button. Performance parameters relevant for dependable blower performance are monitored by sensors, and warn- ing or fault signals are automatically generated accordingly. Optional communication via databus (multiple databus systems can be connected) allows operational status read out and enables the machine to be remotely controlled. Kaeser’s rotary blower range covers air deliveries from 2 to 72 m³/ min at up to 1000mbar gauge pres- sure and 500mbar vacuums. Key applications for these blowers include pneumatic conveying and water treat- ment. The complete system packages are CE and EMC certified. The rotary blowers feature a high broadband sound and pulsation damping ensures quiet operation at all times, which applies to both the machine and the pipework. The blower block with its proven Omega profile rotors enhances opera- tional reliability and uptime, whilst adaptive compression reduces energy consumption, and long bearing life minimises maintenance costs. Space-saving component layout results in a compact footprint. As these blowers were designed to allow the service to be carried out from the front of the unit, it is possible with star-delta equipped models to install several blowers side by side. Com- ponents such as control valves and exhaust silencers are integrated. Relevant factors for reducing operation cost are actual pressure and air demand, selection of appro- priate and suitably matched blowers and drive systems, as well as tailored sequencing control. This is where an Air Demand Analysis (ADA) can prove invaluable: With help of detailed ana- lysis it is possible to determine how compressed air demand varies over time, how efficiently a blower station is operating, and to what extent avail- ability and efficiency can be further enhanced. The Kaeser Energy Saving System (KESS) is an optimisation tool. This specialised planning soft- ware enables different system vari- ants to be simulated and compared with one another, and their respective potential savings to be calculated. Transparency of future servicing and maintenance costs is also essential when considering the total life cycle costs of both individual blowers and stations as a whole. The expanded dry-runner range The latest range of dry-running rotary screw compressors is the CSG-2 series. Available with drive powers ranging from 37 to 90kW, these two-stage machines provide free air deliveries from 5.4 to 13.1m³/min for pressures between 4 and 10bar (g). Together with the existing DSG-2 and FSG-2 series, Kaeser‘s dry-runner range covers free air deliveries ranges from 5.4 to 50.0m³/min, and 3.2 to 50.8m³/min for variable speed machines. One can choose between air- and water-cooled versions and have the option of SFC variable speed control for applications with fluctuating air demand. At the heart of these units lies a two-stage compressor airend. The rotors are equipped with “Ultra Coat”, which is resistant to temperatures up to 300°C. Because this cost-reducing coating is highly abrasion-proof, its sealing and protection performance remains virtually unchanged. As a result, compressed air delivery also remains consistent. Air-cooled sys- tems designed for use in ambient temperatures up to 45°C are said to provide further potential for additional long-term savings. The CSG-2 systems are enhanced by the new PC-based Sigma Control 2 internal controller. A precision elec- tronic pressure sensor keeps switch- ing differential to a minimum thereby saving even more energy. It provides greater flexibility through its numerous interfaces and plug-in communica- tion modules. The addition of an RFID reader ensures service continuity, increases security and significantly raises service quality. The Sigma Con- trol 2 is also responsible for compres- sor monitoring. All CSG-2 compressors are pow- ered by IE3 motors. Standard equip- ment includes ‘PT 100’ sensors for measurement and monitoring of the motor winding temperature. This en- ables full use of the maximum motor switching frequency and lower costly idling periods. The use of stainless steel rotors in the second compression stage helps guarantee compressed air quality and enhances service life. As air intake is regulated via a hydraulically oper- ated inlet valve, there is no need for regular replacement of pneumatic diaphragms. This reduces both ser- vice costs and downtime. The use of fibre-free pulse dampers is said to keep pressure loss to a minimum, to maintain consistent air quality and to prevent contamination of the com- pressed air. These systems operate with minimal sound levels. www.kaeser.com