Feature 2 | YACHT DESIGN AND CONSTRUCTION


says Evac. From an interior designer’s perspective the challenge is


to find


appropriate solutions that combine form and function, and so Evac is also developing solutions such as coloured options in porcelain and the possibility to connect a normal gravity toilet to the vacuum system. Evac explains that small and compact


machinery spaces available to system suppliers and reduced headroom in comparison to conventional vessels mean that pipework arrangements have to be run through tight void spaces and headlining and will share space with domestic electrics, water and heating, ventilation and air-conditioning (HVAC) supplies. Taking these installation challenges


into consideration, Evac has designed the ComVac sanitary system to offer total design flexibility when compared to standard gravity systems. Te vacuum


toilet system transports black and grey water to the collection tank and on to the sewage treatment plant via pressure differential. Evac says that as a result, small-bore pipework ranging from DN40 to DN70 can be run around ductings and within deckheads, where gravity will not permit, aided by the system’s 4m liſt capability. The toilet system is operated using


the OnlineVac system, alongside Evac’s macerating V16 type vacuum pump and uses less than 1litre of water per flush (80% less than conventional systems), while ComVac’s 910 Prestige Silent vacuum toilet for guests only emits 85dB(A) during operation (similar to a normal flushing toilet). In terms of weight savings the system’s


small-bore pipework confers an end saving of up to 25% in overall weight when compared to standard gravity


systems. With an emphasis on creating as small a footprint as possible, ComVac’s Orca III


sewage treatment plant is


designed to be as compact as possible. Te units come in sizes with capacities ranging from 1.5m3


need of most superyachts, up to 20m3


/day, which covers the /


day for larger vessels. Evac also notes that it the plant is ideally suited to waste water treatment for vessels such as superyachts, which remain idle for part of the time, as a result of its physiochemical treatment technology. As part of the company’s range of design


engineering services in support of its waste water systems, Evac is able to aid yards and designers in providing system design/ sizing, technical drawing submittals, onsite surveys and supervision, turn-key supply and installation (depending on location), startup and commission and through-life legacy support. SBI


MARINE & OFFSHORE RENEWABLE ENERGY


26-27 September 2012, RINA HQ, london CALL FOR PAPERS


Marine and offshore renewable energy sources have the potential to make a significant contribution to the increasing total global demand, as well as meeting targets for clean energy. However, the demanding environment in which they are found presents great technological challenges for those who wish to develop such sources.


Wave, tidal and offshore wind energy projects involve a wide range of disciplines and expertise. This conference will bring together the


industry stakeholders to provide a forum for discussion and a means of professional development for those involved with using natural marine resources to generate energy.


The conference will cover a wide range of topics:


• Research, development and testing. • Design and construction of renewable energy systems. • Installation, maintenance and subsea operations. • Transport / lift vessels and associated support infrastructure. • Project management and integration. • Economics and viability. • Marine planning, environmental protection and sustainable development. • Regulations, licensing and future directions for development.


www.rina.org.uk/renewable2012


If you wish to submit a paper or if you would like to receive a full programme brochure and registration form, please contact the conference department at conference@rina.org.uk


30


Ship & Boat International March/April 2012


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