"Future on board. Today": GEA at SMM in Hamburg

With the reciprocating compressors of the GEA Bock HG44e and GEA Bock F76 series, GEA proves that high efficiency does not have to be at the expense of longevity.

The semi-hermetic reciprocating compressors represent a wide range of suction gas-cooled compressors with maximum flow rates of approx. 6.5 to 337.5 m³/h (at 60 Hz). The series thus covers the entire cooling and air-conditioning requirements on ships, from cabin and provisions cooling to process cooling. The optimized semi-hermetic compressors benefit from a state-of-the-art valve plate system, highly efficient electric motors and an improved gas flow compared to its predecessors.

The F-series comprises open, single-stage compressors with 2, 4, 6 or 8 cylinders, which are designed for common synthetic refrigerants (e.g. R134a, R404A, R507, R407C, R22, R448, R449). The maximum flow rates range from 12.6 to 337.5 m³/h (1,740 l/min). They are driven either directly via a coupling or with a V-belt. Due to the large-volume oil sump and the reliable oil pump, which is independent of the direction of rotation, it can be used over a wide speed range. A stable drive, successful mass balancing and low pulsation contribute to robustness and smooth running. The F-series runs smoothly on both axles even at short gradients of up to 30°, making it ideal for use at sea. The four new models in the F76 series replace the proven F14 and F16 compressors.

With the development of the mexxFlow plate system, GEA was a pioneer in the field of highly efficient valve plates for higher capacities. With the knowledge gained from practical experience over the past decade, GEA has consistently improved and further developed the system. The result, mexxFlow 2.0, has already been tried and proven in GEA's large semi-hermetic compressors. The new mexxFlow 2.0 valve system is available for GEA's revised F series F76 and F88. The second generation of the valve plate system shows even greater resistance with a consistent high efficiency. This makes it suitable even for the toughest requirements of marine applications.