COMPRESSED AIR FEATURE
GUIDE TO OIL-FREE COMPRESSED AIR
BOGE Compressors has published a comprehensive guide to oil-free compressed air. It explains the key differences between types of air compressors as well as important factors that should be considered for the reliable production of absolutely 100% oil-free compressed air. Available as a free download, this
guide is a must-read for professionals especially those responsible for the reliable supply of compressed air in sterile and clean environments. It highlights the most important
considerations when selecting a unit that meets the requirements of a specific application including key differences between oil-free and oil- injected systems, the varying ranges of oil-free compressors available and the significant benefits of ‘dry running units’ in comparison with their lubrication-aided counterparts. The guide includes information on key areas where businesses can improve the energy efficiency of their compressed air systems such as through using VSDs and installing heat recovery technology.
BOGE Compressors
www.boge.co.uk
ADVANCED TECHNOLOGY COULD SAVE UP TO 60% ENERGY
With the shadow of the EU’s 2021 energy saving legislation looming over the UK’s refrigeration market, the industry is being urged to proactively target compressor efficiency in order to fulfil its carbon reduction obligations. Compressors are by far the largest energy consumer within a refrigeration system and the technology has been highlighted as an area that needs improving. The refrigeration industry faces an enormous challenge over the coming years to reduce compressor power consumption without affecting productivity, according to ICS Cool Energy. “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 technology which must change in order to achieve the greater target efficiencies outlined by the European Commission’s Ecodesign Directive,” comments technical manager Brent Hall. Operating processes of larger
compressors should serve as inspiration for the industry, according to ICS. One such example would be oil-free compressors such as the Turbocor range which use magnetic bearings to offer improved efficiency and reliability levels by reducing moving parts. However, such compressors are not suitable for all applications therefore a decision should
be made as part of the system design stage, not afterward. “Ultimately one of the most accessible
Technical manager Brent Hall
methods of improving energy efficiency in the refrigeration market is to use built-in optimised variable speed drives (VSDs) which in essence the Turbocor does,” says Brent. “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 50-60%. “On the whole it appears that the technology is not too far away as VSDs are currently available as optional extras on larger plant and both inverter-driven screw compressors and digital scroll compressors have been introduced to the market. However for the industry to realistically achieve the savings mandated by the EU such advances must become commonplace across all chiller equipment within the next 10 years.”
ICS Cool Energy T: 0800 774 7426
www.icscoolenergy.com
Reliability & Effi ciency without Compromise
New L160 – L290 Fixed & Regulated Speed (RS) Rotary Screw Compressors
CompAir - setting standards in compressed air technology
www.compair.com
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