GEA has launched an innovation that combines the GEA Blu chillers and GEA Red heat pumps in a single product. The new GEA Blu-Red Fusion is a combination of a GEA BluAstrum or GEA BluGenium chiller (low stage) with a GEA RedAstrum or GEA RedGenium heat pump (high stage). It is particularly suited for combined cooling/refrigeration and heating demands at low heat source temperature levels and high-temperature lifts between the heat source and heat sink.
GEA Blu-Red Fusion models are based on the existing Blu chiller and Red heat pump family, which are configured and combined according to manual selection or depending on the capacity, heat source and heat sink temperature requirements. Heat source outlet temperatures are supplied between +15 and -15°C while the maximum supply temperatures at the hot side reach up to +70°C (reciprocating compressor-based heat pump stage with GEA RedGenium); and up to +80°C (screws compressor-based heat pump stage with GEA RedAstrum). Cooling capacities range from approx. 300 to 1,800 kW with heating capacities of approx. 450 to over 2,400 kW (sec. refrigerant at +12/+6°C, heat carrier at +50/+70°C).
The intermediate stage is equipped with one single, efficient ammonia-ammonia ’cascade’ heat exchanger. Not only does the design drastically reduce the capital investment, it also makes an intermediate liquid cycle redundant, which reduces the differential pressure of both stages and does not waste power on glycol or water pumps. The efficiency benefit easily reaches 10% and more. This means a dramatic reduction in energy costs and CO2 emissions.