The first refrigeration system with a separate compressor has been installed in a cash and carry market in Switzerland. The system, delivered by the Italian manufacturer enEX, combines five normal compressors with one parallel compressor and reduces energy consumption by removing flash vapour. As a result, this special technology significantly increases energy efficiency.
The natural refrigerant R744 in general shows veryhigh efficiency in cold climates where the ambient temperature is not too high in summer. The thermodynamic losses that occur when it gets too hot outside can be compensated by an improved process, such as multi-stage compression and decompression.
Increase performance and decrease costs
The concept of parallel compression has already saved several thousand kWh of electric energy during the first year of operation. Savings for 2009 might be even higher since the system has been extended and optimised again by Frigo-Consulting AG and a further reduction of the operating costs is expected.
To install the parallel system additional costs for components, such as heat exchangers, frequency converters or other parts are necessary but can be balanced by the increased cooling performance of 3% and therefore smaller compressors. The engineers could be prepared for the new technology with a simple training, so that additional expenses for technical service or intervention are negligible.
About Frigo-Consulting and enEX
Founded in 1988 the Frigo-Consulting AG headquarters are situated in Bern, Switzerland. The well-trained and experienced engineers and specialists working for the company are mainly active in the field of commercial and industrial refrigeration systems. Frigo-Consulting AG has special expertise in sustainable engineering and is supporting the realisation of subcritical and transcritical R744 systems with great success.
enEX is specialized in design, prototyping and manufacturing of environmentally friendly air-conditioning, ventilation, refrigeration, and heat pumps. The Italian manufacturer has expertise in complete systems, units, control and regulation systems to measure and optimize performance.
