Boland Hydropower

  The central province of Quang Nam has scrapped plans for building four hydropower plants, the province People's Committee said. Nguyen Hong Quang, its deputy chairman, said Monday the People's Council decided to remove four small and medium-sized projects -- A Vuong 4 in Tay Giang and Dong Giang districts, Song Bung 3 in Nam Giang District, A Banh in Tay Giang District, and Dak Di 4 in Nam Tra My District – from the list of planned hydropower plants as they have low capacity, severely impact the environment, require large tracts of land, and bring low economic benefit. The fact their investment procedures were tardily completed impacted the planning and construction of other infrastructure and caused disapproval in the community, he said. "The scrapping of these hydropower projects is also to re-evaluate the impacts of small and medium-sized hydropower plants." Two other plants in Nam Giang District, Cha Val and Dak Pring 2, are also being considered for removal, ac...

  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...