Hydro Energy Articles

  • Auxiliary Service Units on Large Hydro Facilities - Case Study

    Ossberger Hydro also has technologies that are well adapted to implement on larger hydroelectric facilities to provide power for auxiliary services whether it is mechanical pumps for oil circulation on main turbine bearings, managing auxiliary electric loads, or even provide black start capability in case of emergencies. Project: LG-1 Client: Hydro Quebec Location:  James ...


    By OSSBERGER GmbH + Co. KG

  • Hydro Plant Redevelopment - Case Study

    Many of our recent projects in the United States and Canada have been related to the redevelopment of abandoned structures or related to an existing plant upgrade. Shown below are a few project ...


    By OSSBERGER GmbH + Co. KG

  • Minimum Flow Units - Case Study

    Environmental regulations are becoming more stringent and the minimum by-pass flow requirements are generally increasing in North-America. Many of our small hydro technologies are perfectly suited for this type of application whether it is to replace an existing pressure reducing valve or implement a new turbine upstream of the by-passed reach of an existing hydro plant. Shown below is an example ...


    By OSSBERGER GmbH + Co. KG

  • Case Study - Flow Measurements for Control of 98 MW Hydroelectric Project District of Machu Picchu Peru

    The Santa Teresa hydroelectric project is owned and operated by Luz Del Sur, a subsidiary of Sempra Energy. The plant is located near the world heritage site of Machupicchu, high up in the Peruvian Andes. The intake for the project is on Río Vilcanota, and a flow of up to 61m³ per second passes through a 4km network of tunnels and pipes to two Francis turbines. The ...


  • In safe hands with Rotork

    Satisfying the flow control demands of the oil and gas industry with reliable and innovative actuation solutions has been one of Rotork’s major achievements throughout its 60 year history. In addition to the manufacture of electric, pneumatic, hydraulic and electro-hydraulic actuators, instrumentation, valve gearboxes and valve accessories for new plants, Rotork has also gained unrivalled ...


    By Rotork

  • A conceptual framework for real time estimation of WFP for small hydroelectric power plant

    It is believed that the power sector, particularly hydroelectric power, contributes to a very high consumption of fresh water in terms of evaporation from storage reservoirs. Robust methods of water footprint (WFP) assessment will eventually help in the pricing of water and energy. Conventionally, WFP for hydropower plants is estimated by dividing the gross/net evaporation losses by power ...


    By IWA Publishing

  • Forecasting monthly energy production of small hydropower plants in ungauged basins using grey model and improved seasonal index

    A first-order one-variable grey model (GM(1,1)) is combined with improved seasonal index (ISI) to forecast monthly energy production for small hydropower plants (SHPs) in an ungauged basin, in which the ISI is used to weaken the seasonality of input data for the GM(1,1) model. The ISI is calculated by a hybrid model combining K-means clustering technique and ratio-to-moving-average method, ...


    By IWA Publishing

  • Join a free webinar on Balkans Hydropower investment potential

    Join free webinar on the investment potential of hydropower in the Balkans Learn more about the hydropower investment potential of Balkan countries, as well as industry development plant at the webinar held in the run up to the international Summit and Exhibition "Hydropower Balkans 2017". Register for the webinar: ...


    By Vostock Capital

  • Extended multi-objective firefly algorithm for hydropower energy generation

    Classical methods have severe limitations (such as being trapped in local optima, and the curse of dimensionality) to solve optimization problems. Evolutionary or meta-heuristic algorithms are currently favored as the tools of choice for tackling such complex non-linear reservoir operations. This paper evaluates the performance of an extended multi-objective developed firefly algorithm ...


    By IWA Publishing

  • Research on joint generation scheduling of cascade hydro plants in the dry season

    As more and more reservoirs are built, concentrated water releasing in the dry season will bring about additional flow compensation and the joint operation of cascade hydro plants is quite important. This paper discusses the water level decline strategy of four cascade hydro plants in the Jinsha River and analyses the relationship between guaranteed output and total power generation. ...


    By IWA Publishing

  • Modified Sine Wave Inverters vs Pure Sine Wave Inverters

    Most everyday appliances and commercial tools run on AC power. This is fine if you’re connecting the device to a wall outlet that provides AC power. But what if you want to use power from a DC source, like a solar-powered generator or a car battery? In such cases, individuals need to use an inverter – a device that converts DC power to AC power. There are several types of ...


    By Larson Electronics LLC

  • Framing the Brahmaputra River hydropower development: different concerns in riparian and international media reporting

    Development of the Brahmaputra River, which links China, India and Bangladesh, has been hindered by significant challenges, particularly political challenges. News reports can mirror the perceptions of political actors, but are, owing to the complexity of the issue, complicated and unstructured. We present a comparative content analysis of the overall framing in news reports of the Brahmaputra ...


    By IWA Publishing

  • How to make hydropower more environmentally friendly

    Hydropower provides 85 percent of the world’s renewable electricity, but comes with a hefty environmental price tag. Here’s what some are doing to fix that. Humanity got its first large-scale electricity thanks to hydropower. On Aug. 26, 1895, water flowing over Niagara Falls was diverted to spin two generators, producing electricity to manufacture aluminum and carborundum. Since ...


    By Ensia

  • Study: 100% Renewable Electricity System is the Cheapest Option for South America

    Transitioning to a fully renewable electricity system is possible for South America by 2030. A study by Lappeenranta University of Technology (LUT) and VTT Technical Research Centre of Finland Ltd. also shows that a 100 percent renewable system (100% RE) is the cheapest electricity production option and can be achieved with very little energy storage. "South America has a unique renewable energy ...


    By Smart Grid Observer

  • WorldWaves wave energy resource assessments from the deep ocean to the coast

    Abstract WorldWaves is a global wave and wind climate package developed through EU and industry sponsorship over many years. The offshore data incorporates global hindcast and operational wave and wind data from ECMWF, validated and calibrated with independent satellite and buoy data worldwide. These data, which may comprise full directional wave spectra time series, are used as ...


    By Fugro OCEANOR AS

  • Wind Energy Production Estimates: Moving Beyond Time Averages

    No need to be a statistician to see that averages are often useful to compare different things. And yet, they often fall short as a true measure of performance. For instance, we use averages to compare the current weather against the climate normals or to get a sense of how our favorite sport team or player is doing. Team (player) statistics are a concise way of combining the scores from many ...


    By AWS Truepower, LLC

  • Environmental impacts of ocean-energy systems: a life-cycle assessment

    Ocean-energy technologies — which harvest renewable energy from the sea — will have a significant role to play in a future low-carbon society. A recent life-cycle analysis of different ocean-energy devices has found that life-cycle environmental impacts are caused mainly by the materials used in the mooring, foundations and structures. Improving the efficiency and lifespan of the ...

  • Want to Address the Driver Shortage? Get Connected.

    The reasons drivers are giving for leaving fleets and the industry are very similar to why any employee changes jobs: Pay. Respect. Problems with a supervisor. Time away from home. Lack of communication. Bad equipment. No opportunities for advancement. Or the job just isn’t what was expected. But if you look deeper you’ll see that drivers may be saying those are the reasons, but ...


    By Omnitracs, LLC

  • Case Study - 6MW Non-Condensing Power Plant

    Lihir Island, Papua New Guinea – 2003 First Geothermal Power Station in PNG: Press Release, April 16, 2003 Lihir Gold Limited “Gold company Lihir Gold Limited is turning its vast geothermal resource into an opportunity. In April, the company started commissioning a 6MW geothermal power station, the first in Papua New Guinea to use natural geothermal ...

  • Power Inverter Basics

    Basic knowledge of power inverter Power inverter mainly adopts the PWM at present, controller switch to DC rapidly in a pulse-period to ensure that the DC integral value is equal to the sampling values of AC sine wave at the same time. After filtered, more than 96% sine wave output can be realized. Pulse inverter is self-excited inverter that output voltage is pulse modulation. This kind ...


    By GoHz Inc

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