One of many world’s most superior polar analysis vessels is supplied with Atlas Copco marine-duty compressors.
The RRS Sir David Attenborough, commissioned by Pure Surroundings Analysis Council (NERC), constructed by Cammell Laird and operated by British Antarctic Survey, is a analysis platform engineered to rework how shipborne science is performed within the Polar Areas. Its commissioning is a part of a big authorities polar infrastructure funding program designed to maintain Britain on the forefront of world-leading analysis in Antarctica and the Arctic. This £200 million dedication represents the U.Ok. Authorities’s most substantial funding in polar science for the reason that Nineteen Eighties.
As an integral a part of shipboard operations within the engine room or deck web site environments, the marine compressors wanted to be particularly designed for the tough circumstances such because the RRS Sir David Attenborough will expertise whereas working in mid-ocean or sea ice, days or even weeks away from temperate landfall and servicing services.
Inside the sensible constraints of minimal energy consumption and restricted set up area, Cammell Laird had to make sure that the efficiency and construct high quality of the compressed air system might meet its standards for reliability, vitality effectivity, stability, security, and regulatory compliance.
Along with the general requirement for a dependable and strong provide of compressed air for the various routine common air purposes on the vessel, it was equally important that top high quality, clear dry air was obtainable as instrument air for the important bridge devices. This was to make sure their correct efficiency in monitoring and in driving engine management programs. Equally important, there was an additional demand for precision within the provide of high-quality air for the onboard scientific experiments and measurement operations that will be carried out.
This full spectrum of compressed air duties was met from Atlas Copco’s MAS vary of marine compressors, technically superior options which might be totally optimized for shipborne use. The MAS household of 5-90 kW oil-injected screw marine compressors, derived from its premium GA vary of stationary industrial items, units the usual in marine compressed air manufacturing, combining low value of possession with dependable, energy-efficient efficiency.
Atlas Copco’s profitable response to Cammell Laird’s compressed air gear tender noticed the set up of two central compressor programs. For common service and scientific air purposes, two MAS+ 55VSD water-cooled rotary screw compressors and accompanying FD 285 refrigerant dryers, along with filtration, air receivers and digital drains, had been put in. On the similar time, the requirement for prime quality, clear, dry, 7-8 bar instrument air and a provide of scientific air was met by a MAS15VSD air-cooled unit with ancillaries comprising an FD60 refrigerant dryer, 250-liter receiver, filtration and drain items.
Vitality-efficient, low-noise operation
The vitality cost-saving advantages of VSD know-how in compressor design are already well-known. Nevertheless, the MAS+ 55 VSD compressors, as chosen for the RSS Sir David Attenborough, go even additional, providing on common 20% decrease Particular Vitality Requirement (SER) and common 50% much less vitality consumption in comparison with a daily MAS VSD mannequin. On prime of vitality financial savings, there’s a Free Air Supply (FAD) enhance of as much as 12%.
An extra contribution to energy-efficiency is derived from the MAS compressors’ controller. The Elektronikon unit controls the compressor with suggestions from the built-in converter to make sure most effectivity and full safety of the compressor system. The controller options voltage-free contacts for alarms and read-out, and distant management is a regular characteristic. Moreover, all strain and temperature measurements could be monitored through the MAS items’ Elektronikon, controller graphic show.
Low-noise operation too was an necessary issue for Cammell Laird. The MAS compressors onboard the RRS Sir David Attenborough are enclosed in a cover, bringing their noise ranges down by 14dB(A) to 69dB(A)—a further boon for the analysis vessel, which was designed and constructed as a low-noise vessel in accordance with DNV codes ‘R’ and ‘S’.
Compact dimensions and accessibility
The size of the compressor items had been additionally a important characteristic in favor of putting in Atlas Copco marine compressors. With engine room area all the time at a premium, marine customers’ most suitable choice is to match the required efficiency to gear providing the smallest footprint. The MAS compressors’ compact dimensions and distinctive vertical configuration supplied the smallest footprint in the marketplace not just for economical area utilization however, throughout preliminary set up, allowed quick access via normal ship-sized doorways.
For a similar purpose, air connections and ancillaries similar to condensate drains are situated at one facet of every unit to permit most proximity to bulkheads and to offer prepared entry for routine upkeep procedures.
With stability at sea an equally necessary consideration, the MAS compressors’ element configuration has been designed to offer a low middle of gravity that minimizes gear stress even in extreme working circumstances.
Security and regulatory compliance
The onboard compressors and air receivers are topic to inspection and certification by Lloyd’s Register of Delivery. The Atlas Copco compressor idea complies totally with the Lloyd’s Register Guidelines and Rules of working circumstances for foremost and auxiliary equipment—important to the propulsion and security of the ship.
The compressor gear’s development additionally complies with the Inexperienced Passport rules and pointers which determine the hazardous supplies onboard a ship, together with portions and areas. It’s an important a part of the IMO’s activity of selling the protection of employees on ships and whereas lowering the environmental air pollution generated by seagoing vessels.
Worldwide marine service assist
Service assist for the set up is supplied in a seamless transition from inception and commissioning to full-time operational duties internationally. Atlas Copco’s international presence implies that session, engineering and design could be carried out within the U.Ok. whereas servicing, spare components provide, coaching and technical assist could be provided regionally wherever it’s required.
Commenting on the challenge, Raymond Smith, enterprise improvement supervisor at Atlas Copco, mentioned, “Though our compressors are designed for the longest potential service intervals, we have now to make sure service protection is offered the place and when ship house owners and operators want it. That’s why we function an intensive service providing in most harbors in additional than 100 nations world wide.”