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Bitzer expands its transcritical CO2 compressor range

Compressor giant Bitzer has expanded its series of semi-hermetic refrigeration compressors for transcritical CO2 applications

Bitzer has expanded its series of semi-hermetic refrigeration compressors for transcritical CO2 applications, including smaller and larger models. With the introduction of the 4PTC-6K model for lower displacements and the 4DTC-25K and 4CTC-30K models for higher displacements, the series now ranges from 4.3 to 25.6 cubic metres of displacement per hour at 50 Hz.

With carbon dioxide, only very small amounts of direct greenhouse gas emissions are released, so with these applications a greater focus is placed on reducing indirect emissions through energy consumption.  Consequently, Bitzer CO2 compressors offer high energy efficiency and exceptional versatility, the firm says.

The manufacturer add that is the only compressor manufacturer to also have its performance data certified by ASERCOM (Association of European Refrigeration Component Manufacturers). All compresseors for subcritical CO2 applications, and most of the compressors for transcritical applications, have been integrated into the certification programme, it said.

At thesame time, Bitzer has extended its Ecoline reciprocating compressors, so that they now operate with propane, hydrocarbons and the new HFO and HFO/HFKW blends, along with R134a the R407 series and the higher-GWP HFCs.  Special versions can also be specified for high-pressure R410A, the firm added.

The Ecolines can be used as a replacement components within existing refrigeration systems.  The coefficient of performance (COP) has been improved throughout the series by 6 per cent in terms of the usual nominal points and as much as 12 per cent for the low condensing temperatures important for seasonal efficiency.  The compressors with motor version 2 are now universal refrigeration compressors for full low and medium temperature applications. 

New Ecolines are compatible with previous generation versions as they feature an unaltered mounting hole pattern and the same pipe connections. 

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