Hydraulics & Pneumatics July/August 2022

APPLICATIONS Air power for RRS Sir David Attenborough As a practical example of the need for custom solutions to marine air power needs, shipbuilders Cammell Laird Construction installed Atlas Copco marine-duty compressors aboard one of the most advanced polar research vessels in the world, RRS Sir David Attenborough. The vessel’s full spectrum of compressed air duties was met from Atlas Copco’s MAS range of marine compressors, technically advanced solutions fully optimised for shipborne use. The MAS family of 5-90 kW oil- injected screw marine compressors, derived from its premium GA range of stationary industrial units, sets the standard in marine compressed air production, combining low cost of ownership with reliable, energy-efficient performance. However, even the most advanced compressors offering long maintenance intervals and service lives still need attention. That is why Atlas Copco offers parts and services packages which provide peace of mind while vessels are at sea. Worldwide marine service support Service support for the RRS Sir David Attenborough installation was provided in a seamless transition from inception and commissioning to full-time operational duties across the world. Atlas Copco's global presence meant that while consultation, engineering and design could be carried out in the UK, servicing, spare parts supply, training, and technical support was to be supplied locally wherever it was required. With Atlas Copco’s Marine Compressor Parts & Service operation, Atlas Copco compressor parts, and OEM non-Atlas Copco parts, can be ordered from the UK and delivered direct to freight forwarders or anywhere on the planet, such as within 24 hours to Europe, 48 hours to America, and 72-96 hours to the rest of the world. Customised parts plans are specifically created for marine customers by building a maintenance schedule that offers genuine parts, and timely parts delivery, with less administration hassle involved. Over 3600 Atlas Copco field service engineers in 180 countries are ready to attend onboard when assistance is needed for major services and overhauls. The range of marine maintenance services available includes oil sampling, inspection service onboard ship once a year in major hubs around the world, and provision of crew training. The role of SmartLink Knowing the status of marine compressed air equipment at all times is the surest way to spot any developing problems, uncover potential energy savings, and achieve maximum uptime of the compressed air systems. These insights can be realised through SmartLink, Atlas Copco’s remote data monitoring system that works via a vessel’s internet (satellite) network, and where compressor data will be continuously updated. Alternatively, SmartLink can rely on passing through network coverage areas and data can be uploaded from there. Conclusion When it comes to marine compressor applications it is evident that there is no one-size-fits-all solution. Each machine installation requires matching specification and performance to the shipborne equipment and the operational profile. Equally, the hardware installation has to be supported by a worldwide onshore service and parts support network. In making equipment choices there is no doubt that shipyards and shipowners will give preference to suppliers who can offer a wide range of compressor options, a 24/7 global support network of marine experts, based in all major industrial ports, together with an immediate OEM parts supply backed by informed maintenance procedure guidance. www.atlascopco.com/en- uk/compressors/air-compressor- repairs/marine-air-compressor-parts- and-service 36 HYDRAULICS & PNEUMATICS July/August 2022 www.hpmag.co.uk notations; environmental performance monitoring; and Green Passports (Inventory of Hazardous Materials). All ships also have to comply with the Annex IV of MARPOL 73/78 Regulations for the Prevention of Pollution by Sewage from Ships and have to be equipped with sewage plants. To keep them in proper working condition and good balance, the sewage plant needs air to stimulate the growth of the bacterial culture. This application requires low pressure, clean and guaranteed oil-free air, best delivered by the latest low- pressure compressor screw blowers whose energy requirement is on average 30% more energy efficient than conventional Roots-type lobe blowers. Energy efficiency Finally, the ultimate goal is for marine compressor equipment that demonstrates significant energy efficiency. Much has been achieved by the advanced design of key components, such as the non-contact intermeshing screw elements of an oil- free compressor, the sophisticated control algorithm of the electronic regulator used to control the speed of a compressor’s induction motor. But the most significant benefit of all is VSD technology that closely follows the air demand, automatically adjusting the motor speed, and results in achieving energy savings of up to 35% and even more. Linked to this goal is the overriding requirement for marine compressor installations whose design and efficiency generates sustainable onboard productivity for the owners and operators yet presents no risk for the global environment.