Two-Blade Turbines the Future of Offshore Wind Energy? – The Maritime Executive

The benefits of two-bladed turbines include cheaper construction because they require fewer less material to construct and are easier to install. Industry leaders estimate that two-bladed turbines could cost about 20 percent less to construct and install while still generating the same amount of power as three-bladed turbines.

Removing the third blade makes the rotor lighter and allows engineers to place the rotor on the downside of the tower. In addition, two-bladed rotors are often easier to install than three-bladed turbines which must be constructed on-site. Because they often weigh up to 40 tons less than conventional rotors, two-bladed rotors can be built onshore and transported to its designated location on a ship because it is light enough to be lifted onto the tower.   

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See on Scoop.itTurbines Design & Power


Microturbines take on the market – Cogeneration & On-Site Power Production Magazine

COSPP spoke with two microturbine firms at opposite ends of the market spectrum – one the established market leader, with an 85% market share; one a new sector entrant with significant market potential – to discover the commonalities and differences in how each has strategised its market approach.

Jim Crouse, Executive Vice-President of Sales and Marketing at microturbine manufacturer Capstone Turbine, says he ‘would agree with’ Navigant’s analysis. Although increased shale gas availability in the US ‘hasn’t been as impactful on the cogen side,’ he notes, it has ‘certainly been helpful from an oil and gas perspective.’

Once MTT had developed its technology, he continues, ‘we needed to focus on a particular market. We had chosen micro-cogeneration, a common and large market, and also a market where the specific advantages of the microturbine are very important.’ Micro-cogeneration, he says, has ‘been around for 10 to 15 years now with no real breakthrough: the available systems are too expensive and/or the maintenance costs are too high.

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See on Scoop.itMicro generation – Energy & Power systems

Shipboard Waste Heat Recovery Technology – MarineLink

Calnetix Technologies, LLC has published a White Paper describing new processes for producing supplemental power for a ship’s |


Waste heat from the engines is an underutilized source of power that can be harnessed to augment electricity produced by the ship’s generators,” said Calnetix CEO Vatche Artinian. “While heat from the engine exhaust is already being used to generate steam on many ships, it has been difficult to harvest heat from lower-temperature sources, such as the engine coolant. Hydrocurrent™ technology aims to remove this barrier and tap into the low-grade jacket-water heat to generate additional electrical power without increasing fuel consumption.”
“Test data reveal that Hydrocurrent can produce up to 125 kW of electrical power from a temperature source as low as 80⁰C, saving up to 200 tons of bunker fuel and reducing carbon monoxide emissions by 18 tons per year by reducing the load on the ship’s bunker-burning diesel generators,” he added.

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See on Scoop.itHeat energy recovery technology