Power & Energy Solutions

The premier renewable energy publication

Staffing solutions: giving clients room to breathe in a global marketHeadquartered in Berlin, with offices all over Germany, DAL Zeitarbeit is a recruitment and staffing company that operates in the power industry – particularly within the wind sector.In this exclusive interview, company owner Dr. Ansgar Lauterbach explains how the firm alleviates the human resources burden by offering trusted staffing solutions.{pagebreak}PES: Can you give us a basic overview of DAL Zeitarbeit as a company and how it operates, both in European and world-wide sectors?Dr. Ansgar Lauterbach: DAL Zeitarbeit GmbH is a German-based recruitment and staffing company, which mainly operates in fast-growing business sectors like the power plant and wind turbine industry. In these specific sectors, we supply our customers with highly-qualified and experienced personnel all over the world, particularly for the erection and maintenance of wind turbines as well as to give support for the production and repair of rotor blades. In 2007, almost one third of our total sales in the wind energy sector were generated outside Germany. Dozens of companies in the wind energy industry appreciate that DAL meets their HR demands in a quick and accurate manner.PES: How is your operation tailored towards the wind energy sector specifically?

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Taking on the challenge of grease lubrication in wind turbinesHave you ever stopped at a wind turbine and been impressed at the sheer scale of the engineering challenges of constructing such a large harvester of wind energy?Developing and selecting the correct lubricant for these engineering monuments requires not only knowledge of lubrication solutions, but also a deep experience of the factors present in the turbine during the full range of operations. So why is correct grease selection so critical in tribological terms?{pagebreak}Recent moves to harsh environments and scaling up of the energy output puts every component under extreme operating conditions. Take the main bearing in the wind turbine for example. Large, heavy loaded, remote, high moisture atmospheres - none of these are new conditions, but wind turbines have proven to be extremely difficult to master from a lubrication viewpoint. With pressure to capture return on investment and safety being a top priority, getting grease lubrication right is essential for operators. Mobil Industrial Lubricants has sound experience in wind turbine lubrication since more than 15 years helping customers unleash productivity in the very competitive power generation market. That is why equipment builders and operators rely on Mobil SHC Grease 460 WT

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Bolt securing system slashes costs and increases safetyDuring the past decade it has become extremely important to optimise all aspects of product design. Competition is tougher than ever and steel costs have skyrocketed. For economic reasons each component must be utilised to its maximum capacity. Bolted joints became the centre of attention after recent findings that they are often used to as little as 30 per cent of their capacity. Moreover, a failed critical bolted joint could lead to expensive warranty claims or maintenance costs. Control of the clamp load in a bolted joint is vital. {pagebreak} However, when faced with a problem joint, it is not surprising that the design engineer will not have an answer if asked about the clamp load. Torque calculations must always be based on the existing conditions that often are very vague. Unless all parameters are correct, the calculation will be unreliable. Examples of parameters are: •Thread condition of the fasteners•Hardness of contact surface•Material (steel, aluminium, copper, etc.)

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With oil prices reaching record levels and natural gas doubling in price over the last two years, the main beneficiaries are wind power and the environment. Manel Romeu Belles, of Danish turbine company Vestas, looks at how the harnessing of the wind is becoming a complement to oil and gas. {pagebreak}Over the last few months, oil prices have reached their highest level, in real terms, since the end of the seventies. The price of oil is changing the economics of the energy market, making wind power not only valued for its environmental merits, but also competitive in cost with fossil fuels.From 2003 the price of oil increased steadily, followed by an abrupt rise in 2007–a trend that has continued until today. This change is largely due to a structural shift in global oil supply and demand, which has its roots in the ever-increasing demand for oil, especially in China and India. Global energy consumption is expected to increase by 50 per cent by 2030. Other temporary factors such as the weakening of the dollar, market speculation and the political instability of the Middle East have simply worsened the situation.

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In this technical article, Soren Qvist Vestesen of Vestesen A/S – a veteran PES contributor – further outlines the benefits of a Danvest wind–diesel system.Danvest Wind Diesel SystemsWith reference to my earlier PES article from earlier this year, I should like to further describe the efficiency of the Danvest system for high wind penetration and fuel savings. I can illustrate this for a commercial operating plant, by referring to two graphs:

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UPS solutions for wind turbines - high performance in all weathersThe performance and profitability of a wind turbine stands and falls with its operational reliability. Any fault or outage can cost the operator dear while also potentially impacting on safety; costly servicing puts an extra strain on budgets. Therefore, it is all the more important for the operator to have full confidence in each individual component. A continuous power supply plays a crucial role in this and UPS systems from AKI Power Systems can provide the security of an uninterruptible power supply – 24/7, in all winds and weathers, in both onshore and offshore turbines.{pagebreak}Well-founded expertise for high availability and premium powerAKI Power Systems has specialised in UPS systems for more than 20 years. This expertise has also been brought to bear in the area of wind turbines where absolute availability and enormous resilience and reliability of turbine components are as crucially important as is their maintenance-friendliness. The bar is set particularly high with offshore turbines as these must be able to withstand extreme weather conditions. The specialists at AKI develop solution concepts which are specifically adapted to cater for these complexities.

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BBC Chartering is a recognised global leader in providing tailor-made shipping solutions for both heavy lift and project cargoes. It was founded ten years ago and now operates more than 140 vessels from a network of 21 offices. In recent years the company has come to be known as a leading shipper of wind turbines. In this article, we discover how the company operates in this growing field and catch up with Chief Executive, Svend Andersen, to find out more about the logistics of moving these unique structures.{pagebreak}As countries around the world search for clean, renewable energy sources that reduce greenhouse emissions, more and more decision makers are choosing wind power. In terms of CO2 emissions, wind power is currently the cleanest and best option. As the technology has advanced, wind power has become a viable and reliable source of energy generation. The price is competitive and predictable and the supply of wind is relatively unlimited and free. Short construction times offer the potential to meet the booming world energy demand more quickly than building coal or nuclear facilities, and wind power provides the energy independence that many countries desire.According to the International Wind Energy Industry, global wind power

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New Logo Reflects Dedication to Finding Simple Solutions to Complex Shipping Challenges.Leer, Germany - May 27, 2008 BBC Chartering, a recognized global leader in providing tailor-mad flexible shipping solutions for both heavy lift and project cargoes, introduced a new logo and graphic identity this week. This new design is a reflection of the company's dedication to finding simple and effective solutions to the complex challenges of today's global shipping community.{pagebreak}According to Svend Andersen, CEO of BBC Chartering, "This new face for the company is a fresh fit for today's increasingly complex global shipping market. Our new logo communicates our commitment to keeping our approach to shipping simple in the face of growing complexities in our worldwide markets.""A decade ago, BBC began as a small, reliable shipping partner with high performance standards and astrong sense of stewardship with each job," says Andersen. "As we expand our fleet and our operations, it's essential that we maintain the same simplicity and flexibility of a smaller company.""As the company grew, we became more widely known through powerful alliances," says Andersen."These include partnerships with Asia Project Chartering (APC), Caytrans Project Services (Caytrans BBC), and Mediterranean Project Chartering (MPC). These partnerships helped the company expand our

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Wind as a modern energy source: The Vestas View.Wind is an energy source which can help the world's largest and fastest growing economies to reduce their dependence on fossil fuels and on imported energy.{pagebreak}Over the past couple of years, Vestas, the world's largest wind turbine manufacturer, has experienced tremendous growth, and the company vision of wind alongside oil and gas is gaining momentum. Wind power has developed from being an alternative form of energy to its status as a large-scale reliable source of energy integrated in the energy mix along with oil and gas. It's fair to say: wind energy has become an important player in the world's energy markets. 

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