BITZER at Climatización in Madrid

• High-pressure innovation: CO₂ compressors
• Expanded product portfolio: the new OS.A95 for industrial ammonia applications
• It’s all about flexibility: combining uneven scroll compressor sizes in a parallel circuit for use in air conditioning and heat pump systems
• Intelligent, systematic cooling: BITZER ECOSTAR condensing units

Madrid/Sindelfingen, 24 February 2015. Compressor specialist BITZER showcases pioneering innovations in refrigeration and air conditioning technology at this year’s Climatización trade fair in Madrid from 24 to 27 February (Hall 6, Stand D09).

One of the BITZER highlights at Climatización is the eight sub-critical CO₂ reciprocating compressors of the CME series, which are versatile and can be used as boosters or in water cooled systems in low and medium temperature applications.

Because they accommodate a displacement between 1.7 and 9.22 m3/h and are available with two different motor versions, they’re exceptionally versatile and can be adjusted in line with any capacity requirements. At the same time, the new cylinder head facilitates an extremely low pressure pulsation.

Evaluated and certified by ASERCOM with a rating of very good
BITZER is the only compressor manufacturer whose performance data has been certified by the Association of European Refrigeration Component Manufacturers (ASERCOM). Nearly all compressors for sub-critical CO₂ applications and most of the compressors for trans-critical applications have been integrated into the certification program. The efficiency of the system and thus the compressor itself are worth taking a look at.

While motor version 2 primarily boasts higher standstill pressures, motor version 1 expands the range of applications of the CME two-cylinder in terms of evaporation and condensing temperature. The CME series also combines the proven efficiency and the reliable drive gear technology of BITZER SL compressors with an exceptionally high strength pressure of 100 bar standstill pressure, while maintaining operating reliability at all times. Additional improvements include an optimised oil barrier and new suction gas guidance. With a maximum condensing temperature of 25°C, the CME series is also ideal for use with chilled water distribution nets.

BITZER is presenting the new OS.A95 screw compressor, which is specially designed for industrial ammonia applications, to a specialist audience at Climatización. With a displacement of up to 1,015 m3/h at 50 Hz, the application spectrum of the OS.A95 models ranges from air conditioning and medium temperature application to the low temperature refrigeration range, thanks to the enhanced carriage profiles with optimised flow cross sections.

OS.A95: electronics for perfect slider control
A key component of the OS.A95 is the integrated smart electronics CM-SW-01, which in conjunction with the Vi slider can be used to efficiently and infinitely adjust the volume ratio in a wide range of applications. This is made possible with integrated sensors and a slider position indicator. The electronics also reliably monitor the application limits, the allowable temperatures of the compressor and the oil supply. There are also Modbus-based communication interfaces to the master system controllers.

The integrated seamless slider control with position indicator optimises compressor capacity adjustment in line with system requirements. Internal oil management, which stems from the CSH series, is also employed here, using exceptionally low oil circulation rates and differential pressures to ensure reliable and extremely efficient oil lubrication for the compressor.

It’s all about flexibility: combining uneven scroll compressor sizes in a parallel circuit for use in air conditioning and heat pump systems
The patent-pending BITZER Advanced Header Technology (BAHT) is designed for scroll compressor tandems and trios and makes it easier to combine uneven compressor sizes in a parallel circuit in air conditioning and heat pump systems. The newly developed suction gas header with integrated oil distribution plays a key role in this improvement, directing oil to one of the compressors in the tandem and trio units, from which it is distributed among the other compressors. What makes the BAHT system so unique is that it also works with uneven scroll compressors in one unit or when adjusting the frequency of a single compressor. And the system offers another major advantage: active oil management with an oil separator and oil level regulators is no longer necessary. Even when a compressor is shut off, the BITZER Advanced Header Technology maintains oil distribution in the unit.

Intelligent, systematic cooling
Trade fair visitors can see an air cooled BITZER ECOSTAR condensing unit, which adapts the cooling capacity to best suit actual requirements using the speed control of the compressor and fan. The new ECOSTAR generation LHV7E already fulfils the more stringent requirements of the EU Ecodesign Directive, which goes into effect in 2016. Precise temperature control increases the efficiency of the refrigeration system and reduces operating costs, while the sound-optimised airflow ensures a low noise level.