Duvha Power Station in Mpumalanga, South Africa, is a coal-fired power plant operated by Eskom. The 300 metres (980 ft) tall chimneys at Duvha are the second and third tallest structures in Africa, only a chimney located at the Secunda CTL plant is taller. Duvha Blade Root Failure - Free download as Word Doc (.doc / .docx), PDF File (.pdf), Text File (.txt) or read online for free. Duvha Blade Root Failure May 30, 2018 | Author: Nalise Hahn | Category: Turbine , Medical Ultrasound , Power Station , Electric Generator , Applied And Interdisciplinary Physics DOWNLOAD PDF Plant process parameters revealed instrumentation errors and discrepancies between plant gauges and the operator’s mimic across all units. Eskom … The combined generating capacity of the six units is 3 600 MW, enough power to supply a city three times the size of Johannesburg with electricity on a winter’s night. Destruction of the plant as it fell from the Niagara Gorge wall and collapsed into the Niagara River, caused by water seeping into the back wall of the power station. Email. The 300 metres (980 ft) tall chimneys at Duvha are the second and third tallest structures in Africa, only a chimney located at the Secunda CTL plant is taller. In April 2017 General Electric filed a court application accusing Eskom of rigging the tender to install a new boiler at the station so that Dongfang Electric would get the contact even though their bid was R1 billion (US$76 million) more than the General Electric bid. “This is a statutory test that is carried out in every power station. [3] On 9 February 2011 another unit failed catastrophically while performing over speed testing. Various parameters were also found not to be correctly set to design specifications. In 1993 Duvha became the first power station in the world to be retrofitted with pulse jet fabric filter plants on three of its six units. It is not yet clear how long Eskom’s embattled Duvha power station will be limping after “an apparent over pressurisation incident” rendered its unit 3 out of action on Monday night. Turbine Overspeed Test Failure. "This is a statutory test that is carried out in every power station. “Eskom is taking comprehensive action to address the findings of the report,” Dames said. Duvha Power Station in Mpumalanga, South Africa, is a coal-fired power plant operated by Eskom. Construction of Duvha Power Station started in November 1975 and the last unit came into operation in 1984. In 1993 Duvha became the first power station in the world to be retrofitted with pulse jet fabric filter plants on three of its six units. History. The station is a twin sister to Tutuka Power Station. “We are now in maintenance season and we normally take advantage of low demand (to do maintenance) but these days South Africans all have air conditioners so demand is not that low any more,” he said. In 1993 Duvha became the first power station in the world to be retrofitted with pulse jet fabric filter plants on three of its six units. History []. The trouble at Duvha would take 575MW out of the system for more than a year, Eskom said previously. On 8 January 2003, Unit 2 generator exploded while being returned to service after a malfunction. Duvha has six units each with a sent out capacity of 575 MW, so as a base load station it represents 3450 MW on the national grid. [6], Location of Duvha Power Station in South Africa, "Cost comparisons between electrostatic precipitators and pulse jet fabric filters and inherent challenges of both technologies at ESKOM's 6 X 600 MW units at Duvha Power Station", "GE claims Eskom favoured Chinese firm's bid, with backing of Trillian", President of South Africa Residence Nkandla, https://en.wikipedia.org/w/index.php?title=Duvha_Power_Station&oldid=995326378, Coal-fired power stations in South Africa, Infobox mapframe without OSM relation ID on Wikidata, Thermal power station articles using Infobox power station, Creative Commons Attribution-ShareAlike License, This page was last edited on 20 December 2020, at 12:41. Duvha Power Station in Mpumalanga, South Africa, is a coal-fired power plant operated by Eskom. Duvha power station is a coal fired power station built between 1978 and 1984, it is situated near eMalahleni (Witbank) in Mpumalanga. They found the root cause of the failure was a modification of the electro-hydraulic governor controller done in 2004 while the direct cause was operator error. Shortly afterwards the bolts keeping the turbine № 2 cover in place were broken. Before the bearing failure occurs, the temperature change rate is abnormal in most cases. Well, in the worst case, all the Duvha turbines are faulty and the African National Congress company, Chancellor House, buys 25% in a turbine company to replace them at five times their actual cost. 6x600 MWe Coal Overspeed Test Failure: 9 February 2011. All rights reserved, Please visit the official Government information portal for Coronavirus by clicking HERE. Duvha Power Station in Mpumalanga, South Africa, is a coal-fired power plant operated by Eskom. Duvha power station details. Duvha was a major setback in an already tight supply system. The incident happened when the 600 MW units at Duvha had been taken off load to perform a required turbine test. Construction of Duvha Power Station started in November 1975 and the last unit came into operation in 1984. The 300 metres (980 ft) tall chimneys at Duvha are the second and third tallest structures in Africa, only a chimney located at the Secunda CTL plant is taller. Sweeping the bullshit as well as the taxpayer’s money under the carpet!! Scary thing is Duvha has a shared turbine hall. It was the first power station in South Africa to have a black power station manager, Ehud Matya. A last stage turbine blades failure was experienced in two units of 660 MW. He warned that electricity supply would continue to be critical for the next two years. Eskom still had a critical maintenance backlog and this could not be put off for much longer. Share. (1) Turbine bearing temperature The turbine bearing temperature changes depending on whether the rotating part and the bearing itself are normal, as well as the amount of cooling water, water temperature, room temperature, oil temperature, and the like. DUVHA POWER STATION FOR A PERIOD OF THREE YEARS C1.1 Form of Offer & Acceptance Offer THE PROVISION INDUSTRIAL CLEANING SERVICES ON BOILER & TURBINE PLANT AREAS OUTSIDE PLANT AREAS AT DUVHA POWER STATION Options A The offered total of the Prices exclusive of VAT is Sub total The offered total of the amount due inclusive of VAT is 1 (in words) These plants contribute largely to the reduction of air pollution by removing 99.99% of the fly ash, which otherwise would be released into the air through the station's chimneys. not for publication – background info. The three units were retrofitted with pulsejet fabric filters in 1993. However, the other five units of the 3 600MW power station were running normally. They are very lucky they didn’t lose the entire station. Conclusion Dhuva Power Station, approved of our presentation and, yes they placed an order for 2 x 300mm the biggest in our range Self-Priming pumps, order value R600K. Siemens are not the OEM and were never involved. Eskom’s Duhva power station in Mpumalanga was extensively damaged in a major accident last month, putting heavy pressure on South Africa’s already precarious power … Transcript Blade Root / Blade Attachment Inspection by Advanced UT and Phased Array Technique Dr. Michael F. Opheys, Hans Rauschenbach, Michael Siegel; Siemens AG Power Generation, D-45466 Mülheim (Germany) Graham Goode; Siemens Power Generation, Newcastle (UK) Detlev Heinrich; Cegelec AT GmbH & Co KG, Nürnberg (Germany) Corresponding Author Contact: Email: [email … 18 Mar 2011. 2 suffered a last stage blade (LSB) failure on 8 January 2003. [4][5] The units are over speed rated at 3600 rpm and the last recorded speed before failure was 4250 rpm. A well-informed, close observer of this photographed turbine-explosion at the 3600MW fossil-fuel power station in Mpumalanga on February 10 2011 writes:“They were doing a test of the turbine overspeed protection system, and in short, the protection did not kick in. One worker was killed and damage was estimated at US$100 … “We are concerned about summer and are urging all our customers to work with us and save electricity,” Dames said. The investigation was conducted by a team of independent experts appointed by the insurers. The insurers had agreed to settle the claim so it would not impact Eskom's financial position. “The direct cause of … – Sapa, © 2021 Independent Online and affiliated companies. Duvha power station’s very big bang 15th April 2011 By: Terry Mackenzie-hoy Just about everybody now knows that the Number 4 turbine at Eskom’s Duvha power station has gone to heaven. The remaining three feature ABB fläkt Optipulse pulsejet fabric filters. Construction of Duvha Power Station started in November 1975 and the last unit came into operation in 1984. Duvha, South Africa. Duvha LSB Failure 2003 • Sister Unit No. unit came into operation in 1984. The 300 metres (980 ft) tall chimneys at Duvha are the second and third tallest structures in Africa, only a chimney located at the Secunda CTL plant is taller. Power utility Eskom has started an investigation into a fire at its Duvha power station in Mpumalanga, after a 600 MW unit at the power station was severely damaged during a routine turbine test. In 1993 Duvha became the first power station in the world to be retrofitted with pulse jet fabric filter plants on three of its six units. The major failure at Duvha power station in Mpumalanga was caused by operator error, Eskom said on Wednesday. assessment and maintenance review has been conducted on Duvha Power Station Units 1 to 6 Generators. • Similar damage as seen on Unit No. History. Duvha coal-fired power station unreported accident . Three of the units use electrostatic precipitators with sodium trioxide injection. Duvha has always been a baseload station and the 2007 blade failure occurred at around six in the morning before the daily activities started, hence the lack of injuries. Remember the Vertical Turbine pump, we would have to remove the pump from both the suction and discharge pipe work, messy. facebook twitter google+ News Kick No comments: Post a … At the time of its construction, Duvha was a giant of. The major failure at Duvha power station in Mpumalanga was caused by operator error, Eskom said on Wednesday. On the day of the accident, turbine № 2 worked as the plant’s power output regulator. “The direct cause of the incident is attributed to an operating error, in that the operator did not follow the set procedure while undertaking (a) test,” CEO Brian Dames said at the release of Eskom's interim results in Joburg.