Compressors are the biggest energy consumers in a refrigeration system, such as a chiller or direct refrigeration system. To meet carbon reduction targets, the refrigeration industry is being encouraged to adopt using the latest, most efficient compressors.
ICS Cool Energy, a temperature control specialist, believes the refrigeration industry is going to have a tough time reducing energy consumption from compressors without affecting productivity.
“A compressor’s basic function will always expend a certain amount of energy, and as the principles of vapour compression will remain the same, it is the compressor technology which must change in order to achieve the greater target efficiencies outlined by the Ecodesign Directive.”
“Ultimately one of the most accessible methods of improving energy efficiency in the refrigeration market is to use built-in optimised variable speed drives (VSD),which in essence the Turbocor does.”
“Many compressors are currently running on one fixed speed regardless of demand, and generally achieve a co-efficient of performance (or energy efficiency rating) of 3kw of cooling to 1kw of power. However, applying part-load optimisation through a VSD to scroll and screw compressors could allow operators to achieve a ratio of 4.5-5kw of cooling to every 1kw of power: an improvement of circa 50-60 per cent.”
But, to meet the EU energy efficiency targets, Brent stated, the industry must make wider use of the new, advanced compressors in chillers within the next 10 years.