The new HG46 CO2 T

The new semi-hermetic 6-cylinder piston compressor GEA Bock HG46 CO2 T is now available.   With a displacement of 21,8 to 30,2 m³/h, it is the biggest semi-hermetic compressor for transcritical CO2 applications with operating pressures of up to 130 bar currently available on the market.   At normal cooling – gas cooler outlet conditions +35°C (90bar), evaporation temperature -10°C, superheat 10 K – it has an outstanding COP (coefficient of performance) of more than 1,85.

The GEA Bock HG46 CO2 T is characterized by its robust engineering design that enables maximum standstill pressures of 150 bar on the high pressure side and 100 bar on the low pressure side.   The compressor is based on the already established HG34 CO2 T and is used in numerous industrial heat pumps as well as classical refrigeration applications such as supermarkets.   With semi-hermetic GEA Bock compressors for the sustainable refrigerant CO2, GEA Refrigeration Technologies offers a broad portfolio for subcritical and transcritical CO2 applications and more than 20 years of experience in this technology.

Biggest semi-hermetic compressor for CO2 at operating pressures up to 130 bar

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GEA increases energy efficiency of compressors by around 15 %

thanks to mexxFlow® technology

More refrigerating capacity and lower power consumption – this is the motto of the new mexxFlow® valve plate system, which will form the heart of all new GEA Bock compressor generations in future.   Concerning the increase in energy efficiency of semi-hermetic reciprocating compressors, one focus of compressor manufacturers has always been on the valve plate system. It is necessary to release the energy, which is applied by an electric motor, efficiently to the refrigerating circuit while realizing minimal energy losses.

GEA Refrigeration Technologies has also put its focus of continuous development of reciprocating compressors on the valve plate system – the mexxFlow® system now reflects the result of this development work.   GEA was successful in increasing the efficiency of its compressors by around 15 % thanks to a flow-optimized double ring fin construction of the valve plate in combination with a cylinder head, which is specially adapted to the valve plate. Thus, open as well as semi-hermetic GEA Bock compressors achieve new records in terms of efficiency.

Starting from October, the compressor Bock F18, an open-type reciprocating compressor with 8-cylinders and a displacement of up to 280 m³/h, will be the first compressor which is equipped with the mexxFlow® valve plate system. The semi-hermetic 8-cylinder model HG88e and the 6-cylinder compressor HG7e will follow at the end of the year.

An animated movie about the GEA Bock mexxFlow® system can be found here.

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Open type piston compressors in new dimension

In industrial as well as maritime applications, system operators often use open type piston compressors with an external drive when a high degree of reliability, flexibility and operational safety is required. Especially for these application fields, GEA Technologies now presents the new GEA Bock compressor models F18 of the established GEA Bock F-series.With F18 compressor GEA now closes the gap between the GEA product lines GEA Bock and GEA Grasso.

The construction of the new 8-cylinder compressor models GEA combines the know-how in the small and medium output range with know-how in the higher output range. To meet the high quality demands of open-type compressors in this capacity range, GEA focuses on uncompromising quality. A plasma-nitrocarburized crankshaft for example drives the eight pistons of the compressor.   At the same time, the F18 compressor sets new benchmark standards for open-type piston compressors.For the first time, the GEA Bock mexxFlow valve system is used in this compressor.

The mexxFlow system is a flow-optimized double-ring design of the valve plate in combination with a cylinder head especially designed for the valve plate. Due to the use of this valve system, GEA is able to increase the efficiency of the compressor by 15%, compared to the use of standard valve plate technology. With these results, the F18 reaches a new level of efficiency for compressors of this type.When it comes to size and weight of the compressor, the F18 is also significantly smaller than competitors in this capacity range. A fact that makes the compressor much easier to handle, for instance for transportation or when taking it into a machine room.   The F18 compressor is available for standard refrigerants with the start of the Chillventa. A special version for the established refrigerant for industrial systems NH3 (Ammonia) will follow in 2013.

• An animated movie about the F18 compressor can be found here.

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