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GE tests new turbine enclosure for MMP

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first_img May 31, 2017 View post tag: US Navy View post tag: LM2500 GE tests new turbine enclosure as part of module modernization program Equipment & technology Share this article GE’s Marine Solutions announced it has completed a series of fire tests on a new composite LM2500 marine enclosure as part of the Module Modernization Program (MMP).According to the company, the tests verified that the composite material reduces weight and improves performance.The MMP is a program that seeks to inject updated technology into the gas turbine module system and reduce enclosure weight by approximately 50%, with the base structure excluded.Participants of the MMP include GE, General Dynamics Bath Iron Works and the United States Navy; the program commenced in 2014.According to GE, the new monolithic composite structure of GE’s LM2500 marine module does not use bolted joints between the walls and ceiling. This feature improves assembly and noise attenuation through the elimination of noise channels. The use of composites also allows the module doors and access panels to be made larger, yet lighter for ease of handling. The use of composites eliminates rusting of doors, hinges and access panels, reducing maintenance, the company added.The assembly of a prototype enclosure is now underway and will be tested in a full-scale gas turbine test cell to confirm noise attenuation and thermal performances predicted earlier by component tests and analysis. The composite enclosure will then be subjected to barge shock testing to U.S. Navy requirements. These tests are scheduled to be completed by mid-2018.The gas turbine module developed under the MMP will be available in 2018 with the first application intended on the U.S. Navy’s DDG-51 Flight III ships. The lightweight composite enclosure and updated components will be available for international navies in 2018, the company said. Back to overview,Home naval-today GE tests new turbine enclosure as part of module modernization program View post tag: GE Marine Solutionslast_img read more

Southampton’s city limit

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Deltares, Wageningen University: New Approach to Hydrological Modelling

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first_imgWater managers are continuously making decisions to guarantee water safety. These decisions relate to the short term, for example ongoing droughts or, precisely, when there is a risk of flooding. But they can also affect the long term given the more extreme events caused by climate change. All these decisions have one thing in common: they are often grounded on results from hydrological models.Researchers from Deltares and Wageningen University studied a new design for a model of this kind for the Rhine. The results were published recently in the AGU journal ‘Water Resources Research’.Designing a model like this and setting it up for a specific river basin involves a lot of challenges. In particular, setting up the parameters of the model is often thought to be a difficulty. Parameters in a hydrological model are used to link the behavior of the model to that of the river for which the model is set up.Current hydrological models are spatially distributed, which means that they divide the river basin into small cells of, for example, one square kilometre. A set of parameters are in place for each cell.“Until now, the parameter values were determined using calibration methods that were applied to all the model parameters. However, with the ongoing increase in spatial resolution that we use to model river basins, this approach is becoming an unattainable multidimensional challenge,” said Deltares.In this study, the parameters of a hydrological model were estimated using experimental functions from the literature that have been derived in laboratories worldwide.The functions use freely available information about the locality – such as soil, vegetation and land use data – to estimate physical properties.last_img read more