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• Porosity is increased to 44% by novel closed spherical pore strucuture. • Bonding strength and abradability are 4 times higher than reported metal-based ASC. • Spherical shell fragmentation improves abradability while retaining high strength. To solve the long-standing contradiction between the bonding strength and abradability of an abradable seal coating (ASC), a novel spherical closed-pore structure was proposed. The new structure consisted of three discontinuous phases, including locally enriched metals, hollow thin-shell spheres, and pores. The results show that the bonding strength of the abradable seal coating reaches 25.4 MPa, and the abrasion ratio between the coating and blade tip, as a characteristic of the abradability of ASCs, is > 5900. The dewetting kinetics of the metal film on the ceramic sphere were calculated. The size of the shrink metal hemisphere is 3.6 times the metal film thickness. The locally enriched metal enables a high bonding strength, while the fragmentation of the hollow thin-shell spheres enhances the abradability, thus simultaneously improving the strength and abradability. The coating is expected to be used in next-generation turbines to improve efficiency and stability. [Display omitted] [ABSTRACT FROM AUTHOR]

Many households and businesses are seeking ways to generate power through their own sources due to the rising costs of electricity. 'The amount of electricity that can be generated by a turbine depends on the speed and direction of the wind, as well as the size and efficiency of the turbine. [Extracted from the article]

TECH & HOW TO Whether you're looking for more power, need to replace a dead VGT, or want a budget-friendly bolt-on, BorgWarner has long offered the lion's share of fixed geometry turbo options in the diesel aftermarket. No different from the Duramax and Power Stroke applications previously listed, a completely new turbo system is required to swap an S400 onto a 6.7L Cummins, and a second-gen turbo swap kit from Fleece Performance Engineering is shown here. On S400SX models alone there are eight different housings to choose from PHOTO (COLOR): The ability to adjust the compressor housing orientation on both S300 and S400 turbos makes them flexible enough to accommodate virtually any hot-side intercooler piping. Right out of the box, a 60mm (68mm turbine), 63mm (68mm turbine), and 66mm (73mm turbine) S300SX3 equipped with a 90-degree compressor outlet cast into the compressor housing will directly replace the factory turbo, so long as the exhaust manifold has been changed or altered to accept BorgWarner's T4 exhaust housing. [Extracted from the article]

Purpose: This paper aims to discuss the results of the performance study of wind turbine blades equipped with winglets. An investigation focusses on small wind turbines (SWTs), where the winglets are recalled as one of the most promising concepts in terms of turbine efficiency increase. Design/methodology/approach: To investigate a contribution of winglets to SWT aerodynamic efficiency, a wind tunnel experiment was performed at Lodz University of Technology. In parallel, computational fluid dynamics (CFD) simulations campaign was conducted with the ANSYS CFX software to investigate appearing flow structures in greater detail. Findings: The research indicates the potential behind the application of winglets in low Reynolds flow conditions, while the CFD study enables the identification of crucial regions influencing the flow structure in the most significant degree. Research limitations/implications: As the global effect on a whole rotor is a result of a small-scale geometrical feature, it is important to localise unveiled phenomena and the mechanisms behind their generation. Practical implications: Even the slightest efficiency improvement in a distributed generation installation can promote such a solution amongst energy prosumers and increase their independence from limited natural resources. Originality/value: The winglet-equipped blades of SWTs provide an opportunity to increase the device performance with relatively low cost and ease of implementation. [ABSTRACT FROM AUTHOR]

Some of these MPPT controllers can also drive diversion heaters to keep the turbine on-load, but if all avenues are exhausted, they will disconnect the turbine to protect the battery. So each PowerSpout turbine will have the highest potential power output (around 1.6kW) when working close to its maximum head, and at lower heads the output might be limited to less than a kilowatt per turbine. After extensive experimentation, testing, and low-level sales of other turbine designs, production of the modern PowerSpout turbine range commenced around 2010, and the units are now sold round the globe. Www.atob.org.uk 22 A to B 129 Aug 20 T T echnolo echnolo gy gy Hands-on Home-made Hydr Hands-on Home-made Hydro o Hugh Piggott Hugh Piggott I seem to have spent my whole life playing with my toys, which seems like an ideal way for anyone to spend their time. [Extracted from the article]

This article discusses a study conducted by the Center for Drug Evaluation and Research (CDER) on the aerodynamic efficiency of a Savonius vertical-axis wind turbine. The study used computational simulations to evaluate the impact of different blade shapes on the turbine's efficiency. The results showed that a rotor with elliptical blades had the highest aerodynamic performance, with an 80% increase in power coefficient compared to the classic semi-circular profile. Additionally, a twin-rotor configuration using elliptical blades further enhanced the power coefficient, reaching 110% compared to a single rotor with semi-circular blades. The research provides valuable insights into improving the efficiency of wind turbines. [Extracted from the article]

The Saudi Power Procurement Company (SPPC) has approved the expansion of the Rabigh Power Plant in Western Saudi Arabia. The expansion project will add 1.2GW combined-cycle units and will include the installation of high efficiency gas turbines. The project aims to enhance generation capacity, meet electrical system needs, and ensure the reliability of power supply. The $2.5 billion Rabigh IPP, commissioned in 2013, is owned by ACWA Power, KEPCO, and the Saudi Electricity Company. The facility was refinanced in 2016 and has received financial and legal support from Citigroup, Baker Botts, Allen & Overy, and White & Case. [Extracted from the article]

Health monitoring of nonlinear systems is broadly concerned with the system health tracking and its prediction to future time horizons. Estimation and prediction schemes constitute as principle components of any health monitoring technique. Particle filter (PF) represents a powerful tool for performing state and parameter estimation as well as prediction of nonlinear dynamical systems. Estimation of the system parameters along with the states can yield an up-to-date and reliable model that can be used for long-term prediction problems through utilization of particle filters. This feature enables one to deal with uncertainty issues in the resulting prediction step as the time horizon is extended. Towards this end, this paper presents an improved method to achieve uncertainty management for long-term prediction of nonlinear systems by using particle filters. In our proposed approach, an observation forecasting scheme is developed to extend the system observation profiles (as time-series) to future time horizon. Particles are then propagated to future time instants according to a resampling algorithm instead of considering constant weights for the particles propagation in the prediction step. The uncertainty in the long-term prediction of the system states and parameters are managed by utilizing dynamic linear models for development of an observation forecasting scheme. This task is addressed through an outer adjustment loop for adaptively changing the sliding observation injection window based on the Mahalanobis distance criterion. Our proposed approach is then applied to predicting the health condition as well as the remaining useful life (RUL) of a gas turbine engine that is affected by degradations in the system health parameters. Extensive simulation and case studies are conducted to demonstrate and illustrate the capabilities and performance characteristics of our proposed and developed schemes. [ABSTRACT FROM AUTHOR]

The article discusses wind power sector in India. Topics include wind power company Suzlon Energy starting to sell the new turbine S111 from June, 2015, which produces 29 per cent more efficient than the conventional ones, hurdles faced in setting up new wind farms and views of Sumant Sinha, CEO of wind power company Renew Power.

Elisabet Wahlstedt, project leader at Cloudberry, added: "At Cloudberry, ESG is at the centre of everything we do. Norwegian renewables developer Cloudberry Clean Energy has acquired Swedish onshore wind project Munkhyttan Vindkraft for an undisclosed sum. Cloudberry is in final-stage discussions with German wind equipment supplier Eno-Energy for the supply of 3 x 6MW turbines to the project. [Extracted from the article]

The article focuses on an increased manufacturing and assembly costs involved in the designing of drone microturbines. It highlights the efforts of drone makers in using AM (advance metal) equipment to build lightweight and efficient engines at low costs. It discusses the designing of a support-free AM technology by the digital manufacturing firm Velo3D, which improves performance by optimizing air flow, reducing air friction and reducing surface roughness.

(Bloomberg) -- With the right gear, wind turbines can keep on generating through the harshest winter weather. For added protection Skelleftea Kraft maintenance workers ride on armored vehicles when visiting wind sites in the winter. [Extracted from the article]

The article focuses on the risks imposed by the manufacturing processes like turning, milling and grinding on turbine engines. It suggests the use of high-resolution optical 3D (three dimensional) metrology in the manufacturing of turbine blades and turbine discs or blisks (Blade Integrated Disk) for high accuracy, traceably and repeatably. It discusses the impact of using cobots (collaborative robots) by the firm MTU Aero Engines AG on its manufacturing processes.

The article reports on the project Transverse Horizontal Axis Water Turbine (THAWT) of University of Oxford to develop a tidal technology of low production cost. It highlights that capacity of THAWT to perform underwater in low velocity and shallow water and high amount of tidal energy using blockage effect. It mentions the truss design developed to reduce the stress in device rotor using the turbine blade. It states that the device can work in variable weather condition.