Power & Energy Solutions

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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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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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With the steadily increasing share of wind power in the world's total energy consumption, windmill fabrication is maturing as an industrial sector. Marcel Stemvers, European Marketing Manager of ESAB Nederland B.V, discusses the challenges that producers of wind turbine towers face today and the solutions that are being developed to address them.{pagebreak}Having originated within industries such as offshore and pressure vessel fabrication, many fabricators have converted to fully-fledged producers of windmills, often operating internationally. Today, the windmill industry exists in an extremely competitive environment where fabricators are constantly forced to reconsider their production facilities in order to remain competitive. In welding - one of the most important elements of fabrication - increased productivity is a top priority, along with meeting increased weld quality requirements. ESAB is a leading supplier of welding and cutting solutions that closely follows the progress of the windmill industry, working with fabricators to find solutions for welding demands.Wind tower production is a typical welding intensive industry segment. The products are voluminous, identical and require a high structural integrity. The production volume needs to pass pre-defined production steps and a limited number of production stations are available. Commonly, each next (welding) step depends on the tolerances and

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The brainchild of Beluga Shipping and Sky Sails heads for success.MV "Beluga SkySails", a multipurpose heavy-lift project carrier new-build that was christened on December 15th, 2007, and recently enjoyed its maiden voyage, is the world's first modern merchant vessel to be co-powered by wind energy. {pagebreak}The 10,000-tdw carrier is owned, managed and operated by Beluga Shipping GmbH, a project and heavy lift carrier based in Bremen, Germany. Through the company's initial

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Stephan Golz is a representative of wind energy recruitment specialist of Stegmann Personal, an agency under the umbrella of the 7 (S)-Group, and one of the first companies of its kind to specialise in this sector. PES finds out what new demands the rapid growth of wind energy is placing on his firm, and how it keeps afloat in an increasingly competitive market.{pagebreak}PES: To begin, can you provide us with a brief overview of the services your company provides?Stephan Golz: As an employment agency, Stegmann Personal arranges and supervises work contracts and temporary placements for clients across Europe. With more than 160 subsidiaries, 7 (S)-Group has around 8000 employees - with more coming on board every day. Under a multibrand strategy, the group has seven areas of expertise, including wind energy, industry and technology, aviation, engineering, information technology, medical care and logistics.PES: What are staff levels like in the renewable energy industry?Stephan Golz: Currently, around 200 engineers and blue-collar workers have placements in the renewable energy sector, taking care of project development, operation and maintenance, specifically the repair and upkeep of rotor blades.PES: HR is an expense that some companies might choose to cut back on - what are the

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Taking wind turbines to new heights Wind turbines are highly engineered and sophisticated machinery which may operate in wide ambient operating temperatures and extreme environments such as offshore. As a vital asset, it makes good business sense to protect it and prolong its life. Correct lubrication is a critical factor that has been recognised by both component manufacturers and the wind turbine builders as a key success factor for trouble-free operations.{pagebreak}ExxonMobil continues to recognise the increased demands in this market with ongoing investment for research and development to ensure the correct balanced lubricants are available as the sector evolves. Backed by more than 40 years of experience in developing synthetic lubricants and more than 15 years expertise in lubrication of wind turbines, ExxonMobil doesn't just make wind turbines run. They make them fly. How? By helping get the most out of the equipment.Mobil SHC synthetic lubricants and greases Ã

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