Boland Hydropower

  China Three Gorges Corporation (CTG) has announced that its six cascade hydropower plants along the main stream of the Yangtze River put all of their 96 power units into operation on 7 July as part of its efforts to meet the peak demand of the grid in the summer, the first time that all the power generators have been in operation simultaneously. The total power generated from the cascade hydropower plants – Three Gorges, Gezhouba, Xiluodu, Xiangjiaba, Wudongde and Baihetan – reached 52GW on the day. The total power generated by the cascade power stations from June 11 to July 6 reached 17.85 billion kWh, securing electricity supply in Guangdong and Zhejiang provinces. With all the power units of Wudongde hydropower plant and the first units of Baihetan hydropower in operation, CTG now has six hydropower plants on the main stream of Yangtze River, with a total of 96 power units and a total installed capacity of 57.695GW as of June, up from 45.495GW at the beginning of last year. CT...

  THE HAMMER EFFECT (OR WATER HAMMER) CAN HARM VALVES, PIPES, AND GAUGES IN ANY WATER, OIL, OR GAS APPLICATION . IT OCCURS WHEN THE LIQUID PRESSURE IS TURNED FROM AN ON POSITION TO AN OFF POSITION ABRUPTLY. WHEN WATER OR A LIQUID IS FLOWING AT FULL CAPACITY THERE IS A NORMAL, EVEN SOUND OF THE FLOW. YOU CAN TELL WHEN WATER HAMMER OCCURS BECAUSE THERE WILL TYPICALLY BE A BIG THUMP SOUND OR A SERIES OF THUDDING NOISES. THAT NOISE IS THE IMPACT OF THE ENTIRE TRAIN OF WATER COMING TO A QUICK HALT CREATING A SHOCK WAVE. IN THE CASE OF PRESSURE GAUGES, THIS SHOCK CAUSES A SPIKE THAT CAN DAMAGE THE GAUGE EVEN IF THE GAUGE IS THE CORRECT PRESSURE RANGE FOR THE PARTICULAR FLOW APPLICATION. ORDINARILY PRESSURE SYSTEMS SHOULD HAVE AIR CHAMBERS (OR CUSHIONS) INSTALLED THAT SOFTEN THE IMPACT AND PREVENT THE HAMMER EFFECT. ESSENTIALLY, AN AIR CHAMBER IS A VERTICAL SECTION OF PIPING WITH A CAP ON THE END THAT IS ATTACHED TO THE SUPPLY LINE NEAR THE SHUTOFF VALVE. IT IS FILLED WITH ...

  ueensland’s largest hydropower station, the 570MW Wivenhoe Pumped Storage Hydroelectric Power Station, will undergo a $14 million overhaul to ensure it continues to produce cleaner, cheaper energy for years to come. Major maintenance works will start at the Wivenhoe station this month, creating 100 jobs under the Palaszczuk Government’s COVID-19 Economic Recovery Plan. The plant is owned by CleanCo Queensland. Minister for Energy, Renewables and Hydrogen Mick de Brenni said Wivenhoe was incredibly valuable to the reliability of Queensland’s electricity network. “All our publicly-owned energy generators have worked around the clock to respond to constraints in the network in these last few weeks,” de Brenni said. “When Callide C Power Station went offline in May, we were able to ramp Wivenhoe up to the point it was generating 530 megawatts over a four-hour period, helping to meet demand and stabilize the network. Never has it been more important to invest in fast ramping...

 T he Investment Board Nepal this week approved foreign investment worth Rs97 billion for two hydropower projects, the 285MW Tamor and 139.2MW Lower Manang on the Marsyangdi. India’s SJVN is also being issued a survey permit for a detailed feasibility study of the 679MW Lower Arun project in Sankhuwasabha. Likewise, the meeting directed the Ministry of Energy, Water Resources and Irrigation to improve the laws to address the ambiguity regarding the survey permission for the Tamor Reservoir Hydropower Project (756 MW). It also formed a committee to study and prepare a blueprint for the development and investment of the West Seti and SR-6 joint hydropower projects.

  All units of the Wudongde Hydropower Station will officially be put into operation on Wednesday, reducing carbon dioxide emissions by 30.5 million tons per year, China Central Television (CCTV) reported on Wednesday.  Becoming the seventh largest hydropower station in the world with the largest single unit capacity in operation, the power station is equipped with a capacity of 10.20 million kilowatts, CCTV reported, adding that the annual growth rate will reach 38.91 billion kilowatt-hours once the hydropower station being fully put into operation, the equivalent of saving 12.20 million tons of standard coal and reducing 30.50 million tons of carbon dioxide emissions every year.  Wudongde Hydropower Station is designed as a concrete double-curved arch dam with a maximum height of 270 meters. The foundation bed of the dam is only 51.41 meters thick, which makes the hydropower station the thinnest 300-meter arch dam in the world at present. The first series generator sets...

  Tunnel construction of 140MW Tanahun Hydropower Project in Nepal has been completed.The hydropower project is being built in Jhaputar of Rishing Rural Municipality, Tanahun.  According to project Chief Achyutbabu Ghimire, construction of 2.5-km access road from Byas Municipality, Chapaghat, to the project site has already been completed. "We are very glad to have completed this challenging task of tunnel road construction. Completion of these roads have now made it easier for us to start dam construction," said Ghimire.Further, Ghimire said they were able to complete a significant portion of the project as they continued the work even during the COVID crisis.Earlier, the project had suffered some early hiccups due to delay in selecting the contractor and then scrapping the existing contractor and selecting a new one. The project chief said they had adopted all safety health measures to make sure that no worker got infected. Some 45 staffers of the project and the consultant...

  Baihetan Hydropower Station, the world's second largest after the Three Gorges Dam, is expected to have its last reservoir completed on Monday in Southwest China.  The station, with a total installed capacity of 16 million kilowatts, is expected to generate more than 62 billion kilowatt-hours of electricity per year, which would reduce carbon dioxide emission by about 51.6 million tons, according to experts.  The Baihetan station is located downstream of the Jinsha River, in the upper section of the Yangtze River, in Ningnan county of Southwest China's Sichuan Province, and Qiaojia county in neighboring Yunnan Province.  The construction of the main body of the station is expected to be finished on Monday. Its first unit is scheduled to start operations on July 1. The station will be in full operation by the end of 2022.  The Baihetan hydropower station is the world's first to have a power unit with a capacity of 1 million kilowatts with 111 revolutions per mi...