MAN Diesel & Turbo’s longstanding Spanish customer, Cogeneración de Navia S.A., celebrated 100,000 operating hours at their cogeneration plant in January 2011. MAN PrimeServ attends and supports the power plant and its two MAN 12-cylinder 48/60 engines under a comprehensive service contract, which has been running since the commissioning of the engines.
On average, the four-stroke engines at the cogeneration plant are in operation more than 8,000 hours per year at 95% load. They generate power and heat for ILAS’s (Industrias Lácteas Asturiana S.A.) local dairy-product factory, Reny Picot. The engines operate on heavy fuel oil with a sulphur content of less than 1%, and have a total output of 25.2 MW.
At the commisioning in 1998, MAN PrimeServ, MAN Diesel & Turbo’s after-sales division, signed the initial EMC maintenance contract with the customer, Cogeneración de Navia, to attend and support the power plant. The contract has since been extended for a second period of 6 years and is still in force. This continuity has enabled PrimeServ to gather long-term operational experience and extensive measurement data in cooperation with the customer, including performance parameters of the Navia power plant and specific wear and tear rates of engine components. This long-term experience has had direct influence on the effective advancements of the successor engine, the 48/60B type engine.
“I remember the day when the two MAN engines landed for a project called Navia Cogeneration. From that moment I knew that I would have strong support from a leading company like MAN. Thanks to the good cooperation, we have already reached 100,000 hours in service. Since the beginning of our cooperation, everything has improved, and I'm sure that we will continue this close collaboration for many more years.” said power plant manager José María García.
The 48/60 engine
For power generation applications, the well-proven 48/60B heavy fuel engine is available in a nine-cylinder, inline version, and 12-, 14- and 18-cylinder vee-configuration versions. The 480-mm bore and 600-mm stroke engine has an output of up to 1,150 kW per cylinder. As a result of the upgrade, the engines now benefit from better combustion chamber geometry, higher density ratio, and more accurate injection and valve timing. These features reduce fuel consumption and improve ignition, even with poor fuel qualities. As with all MAN Diesel & Turbo engines, the L and V48/60 engines comply with the World Bank guidelines for exhaust emissions. In particular cases, even lower NOx emissions can be achieved for specific plants to fulfil local emission standards worldwide.
About Reny Picot
An Asturian family business, with its main centre of activity in the Anleo Valley, ILAS was founded in 1960 and manufactures many of its products under the Reny Picot brand. Initially concentrating on different types of soft cheeses, ILAS subsequently diversified into powdered milk and the broad range of products that characterise it today, such as standard dairy products, desserts, dietary products, baby food and supplementary products for the pharmaceutical industry. Since its inception, ILAS has grown and diversified through a combination of acquiring existing firms and establishing its own new manufacturing centres. These are found both domestically and abroad in the USA, France, China and Poland, among other locations.
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