珠江冠纜DNV GL船用電纜首個(gè)型式認(rèn)可證書(shū)是什么？

航運(yùn)和海工職業(yè)面臨著不斷加重的競(jìng)賽和經(jīng)濟(jì)壓力，船東、運(yùn)營(yíng)方和船廠正尋覓每一個(gè)增效的時(shí)機(jī)。為了支撐客戶，DNV GL開(kāi)發(fā)了榜首個(gè)船用鋁質(zhì)電纜和接觸器的型式認(rèn)可計(jì)劃。

“這一型式認(rèn)可代表了DNV GL標(biāo)準(zhǔn)的又一個(gè)榜首，表明晰咱們致力于推動(dòng)船級(jí)服務(wù)以協(xié)助咱們的客戶，”DNV GL 海事部高檔副總裁、船只入級(jí)和技能總監(jiān)Geir Dugstad說(shuō)。“電氣化在船只推動(dòng)中起著越來(lái)越重要的效果，這一新的型式認(rèn)或許夠協(xié)助下降本錢(qián)、進(jìn)步可持續(xù)性。”

DNV GL有關(guān)船用鋁電纜和接觸器的型式認(rèn)可使得貴重的銅能夠被鋁替代。節(jié)約的本錢(qián)是巨大的——2018年鋁的價(jià)格約為銅的三分之一。

“傳統(tǒng)上，船用電纜都是用銅做的，”DNV GL 海事部的Ivar Bull解說(shuō)說(shuō)，“銅當(dāng)然是抱負(fù)的導(dǎo)電體，但銅的價(jià)格在曩昔幾十年里一直在急劇上漲，這給海工作帶來(lái)了越來(lái)越大的本錢(qián)壓力。與此同時(shí)，電力推動(dòng)在航運(yùn)中越來(lái)越遍及，因而尋覓更經(jīng)濟(jì)的電纜就顯得尤為需求和重要了。”

鋁的低導(dǎo)電性意味著需求更厚的電纜，但其全體較低的分量能夠補(bǔ)償。例如，一艘典型的海工船或許需求裝置60噸的銅電纜。假如換成鋁，分量就會(huì)削減到30噸。但即使考慮到特別的高質(zhì)量終端的價(jià)格，用鋁替代銅的全體本錢(qián)估量也能節(jié)約50%。更輕的電纜便利船廠裝置，并下降資料運(yùn)輸本錢(qián)。最終，鋁質(zhì)而非銅質(zhì)電纜的船只更輕、更省油，然后下降了運(yùn)營(yíng)本錢(qián)。

鋁電纜的運(yùn)用在曩昔三年中在一艘名為Olympic Artemis的多功能海工船上進(jìn)行了測(cè)驗(yàn)，該艘船由Bibby Offshore公司一切、Olympic Offshore辦理。這些電纜被用來(lái)為船上的一個(gè)推動(dòng)器供電。該檢驗(yàn)證真實(shí)11000多個(gè)營(yíng)運(yùn)小時(shí)后電纜的銜接無(wú)缺，由此DNV GL頒發(fā)了型式認(rèn)可證書(shū)。

DNV GL issues first type approval for aluminium cables onboard ships 

As the competitive and economic pressure on the shipping and offshore industries continues to grow, owners, operators and yards are searching for every efficiency. To support its customers, DNV GL has developed the first type approval scheme for the use of aluminium cables and connectors onboard vessels.

“This type approval represents another first for the DNV GL rule set and demonstrates our commitment to moving classification forward to help our customers,” says Geir Dugstad, Senior Vice President, Director of Ship Classification & Technical Director at DNV GL - Maritime. “Electrification is playing an increasingly important role in ship propulsion and this new type approval can help to reduce costs and improve sustainability.”

DNV GL’s new type approvals for aluminum cables and connectors allow expensive copper to be replaced with aluminum. The cost savings can be significant – with the price of aluminium in 2018, approximately one third that of copper.

“Traditionally, power cables for marine use have been made with copper,” explains Ivar Bull, DNV GL – Maritime. “Copper is an ideal electrical conductor of course, but the price of copper has been rising sharply over the last several decades – putting increasing cost pressures on the maritime industry. At the same time, electric propulsion is becoming more widespread in shipping, which will increase the demand and importance of finding more economical power cables.”

Aluminum’s lower conductivity means that a thicker cable is required, but this is compensated for by an overall lower weight. For example, a typical offshore support vessel may have 60 tons of copper cables installed. If these were replaced with aluminum, the weight would fall to 30 tons. But even with the price of special high quality terminations factored in, the overall estimated saving from switching to aluminum from copper is 50 per cent. Lighter cables also result in easier installation for the ship builder and lower material transport costs. Finally, a vessel with aluminium rather than copper cables, is lighter and more fuel efficient – resulting in lower operational costs.

The use of aluminium cables has been tested for the past three years in a pilot installation onboard the Bibby Offshore owned, Olympic offshore managed, Olympic Artemis, a multi-purpose offshore support vessel. The cables have been used to supply power to one of the vessel’s thrusters.

Recently, DNV GL experts, together with representatives from the cable manufacturer Amo Specialkabel AB, checked the aluminum cables onboard Olympic Artemis with a thermographic camera. Urban Sandberg, Technical manager at Amokabel, said: “Amo Specialkabel’s ambition is to be innovative and market leading when it comes to environmental and technical solutions for the marine market.”

The survey confirmed perfect connections after more than 11,000 operating hours and DNV GL was then able to issue the type approvals.