http://www.engineeringnews.co.za
  SEARCH
Login
R/€ = 13.94Change: -0.10
R/$ = 12.58Change: 0.04
Au 1095.91 $/ozChange: -1.15
Pt 982.00 $/ozChange: -2.00
 
 
Note: Search is limited to the most recent 250 articles. Set date range to access earlier articles.
Where? With... When?








Start
 
End
 
 
And must exclude these words...
Close Main Search
Close Main Login
My Profile News Alerts Newsletters Logout Close Main Profile
 
Agriculture   Automotive   Chemicals   Competition Policy   Construction   Defence   Economy   Electricity   Energy   Environment   ICT   Metals   Mining   Science and Technology   Services   Trade   Transport & Logistics   Water  
What's On Press Office Tenders Suppliers Directory Research Jobs Announcements Letters Contact Us
 
 
 
RSS Feed
Article   Comments   Other News   Research   Magazine  
 
 
May 17, 2012

Supplier questions utility’s maintenance procedures, Eskom denies claims

Back
Sekela Bearings technical manager Warwick Steinhobel discusses the company's concerns about Eskom's Grootvlei power station. Cameraperson: Nicholas Boyd. Editing: Darlene Creamer.
 
 
 
Africa|Components|Eskom|Projects|Sekela Bearings|System|Africa|South Africa|Arnot Power Station|Arnot Station|Grootvlei|Grootvlei Power Station|Maintenance|Product|Service|Split Bearings Supplier|Malusi Gigaba|Power|Steinhobel|Warwick Steinhobe|Bearing|Bearings|Cast Iron|Eskom|Floor Vibration
Africa|Components|Eskom|Projects|System|Africa|||Maintenance|Service||Power||Bearing|Bearings|
africa-company|components|eskom|projects|sekela-bearings|system|africa|south-africa|arnot-power-station|arnot-station|grootvlei-facility|grootvlei-power-station|maintenance|product|service|split-bearings-supplier|malusi-gigaba|power|steinhobel-person|warwick-steinhobe|bearing|bearings|cast-iron|eskom-product|floor-vibration
© Reuse this



Split bearings supplier Sekela Bearings says it has a product that will reduce what it claims to be an unusually high bearings consumption at State-owned power utility Eskom’s Arnot power station, in Mpumalanga.


Sekela Bearings technical manager Warwick Steinhobel says bearing consumption at the utility’s Arnot power station is unusually high, owing to floor vibration that causes damage to the cast iron bearing components used in the seal-air fans.

“Seal-air fans are two-stage fans and the bearings sit between the impellers, so you cannot strip it, which is why split bearings are used,” he explains, adding that the bottom part of these bearings cannot be changed, as it cannot be removed from the fan.

Steinhobel alleges that the cast iron bearings base used in the Arnot station’s seal-air fans becomes damaged or breaks, damaging the rest of the bearing parts; however, as Eskom is unable to replace the entire bearing, it replaces only the top part.

“Eskom is fitting brand-new bearings to damaged cast iron, which is why the bearings do not last, resulting in the high bearings consumption,” he claims.


He states that Sekela Bearings has developed its SNQ support bearings to mitigate this problem at the power station.

The SNQ support bearings will, unlike standard support bearings, enable the replacement of the entire bearing, says Steinhobel.

“We believe that, with our product, Eskom’s bearings consumption will be reduced dramatically, which we believe currently amounts to about 15 to 20 bearings a year for Arnot.”

Sekela Bearings has approached the power utility with this solution, but says the utility has not shown an interest in buying the product.

Eskom denies that the utility is wasteful in terms of bearing consumption at the Arnot power station.

“There are 72 seal-air fan bearings in service at Arnot power station. During the last year, the station only had three failures. The bearing replacement cost was R23 000 and the replacement time was about three hours for each incident. These failures had no impact on production, as the spare mill was put in service,” the utility states.

Meanwhile, Steinhobel says Sekela Bearings also offers a type of bearing, which was used in the Grootvlei power station, in Mpumalanga, before it was mothballed in 1989/90


The six units at the Grootvlei power station were mothballed between 1989 and 1990, owing to surplus electricity generation capacity in South Africa; however, its six 200 MW units were demothballed by the end of 2011 as part of Eskom’s return-to-service projects.

“When Eskom closed the Grootvlei power station, it sold off all the spares. I have managed to get my hands on some of the bearing spares.”

Steinhobel claims that one of the spares was specially made for the Grootvlei power station and is not manufactured anywhere else in the world. It is used in the Rothemühle air heater of the power station.

“We believe that the bearings currently in service at Grootvlei have been patched and are damaged.”

Eskom also denies this claim, saying that, while the utility may sometimes switch parts between power stations to save costs, it ensures that all power station components are well maintained.

In January 2011, Eskom launched its quarterly State of the Power System briefings, in line with its commitment to keep stakeholders informed about the state of South Africa’s power system


Public Enterprises Minister Malusi Gigaba said, in February, that the utility had a highly developed maintenance policy designed to ensure that areas at risk are dealt with in order of priority through a consistent schedule of maintenance and inspection work across its fleet of power stations.

Edited by: Chanel de Bruyn
Creamer Media Senior Deputy Editor Online
© Reuse this Comment Guidelines (150 word limit)
 
 
 
 
 
 
 
 
Other Electricity News
Supermarket chain Pick n Pay has vowed to create 20 jobs every day through a new 20, 20, 20 by 2020 programme that would also see the firm simultaneously cut energy use and reduce waste. The newly launched “war on waste” campaign would target food waste, energy...
Article contains comments
Southern African Development Community (SADC) Energy Ministers have called on member countries to produce roadmaps for transitioning their electricity supply industries towards cost-reflective tariffs by 2019 in an effort to improve the sustainability of the sector...
Article contains comments
More
 
 
Latest News
Updated 2 hours 53 minutes ago This eight-page brief is a synopsis of key developments in the construction industry over the past 12 months. It provides an overview of South Africa’s construction sector and includes details thereof in the public and private sectors, as well as labour and skills...
Supermarket chain Pick n Pay has vowed to create 20 jobs every day through a new 20, 20, 20 by 2020 programme that would also see the firm simultaneously cut energy use and reduce waste. The newly launched “war on waste” campaign would target food waste, energy...
Global steel companies will have to balance efforts focused on globalisation while maintaining an eye on customisation if they are to survive and prosper in a market characterised by excess supply, market concentration and digitalisation, professional services firm...
More
 
 
Recent Research Reports
Real Economy Year Book 2015 (PDF Report)
There are very few beacons of hope on South Africa’s economic horizon. Economic growth is weak, unemployment is rising, electricity supply is insufficient to meet demand and/or spur growth, with poor prospects for many of the commodities mined and exported. However,...
Real Economy Insight: Automotive 2015 (PDF Report)
Creamer Media’s Real Economy Year Book comprises separate reports under the banner Real Economy Insight and investigates key developments in the automotive, construction, electricity, road and rail, steel, water, gold, iron-ore and platinum sectors.
Real Economy Insight: Water 2015 (PDF Report)
Creamer Media’s Real Economy Year Book has been divided into individual reports under the banner Real Economy Insight and investigates key developments in the automotive, construction, electricity, road and rail, steel, water, coal, gold, iron-ore and platinum sectors.
Real Economy Insight: Construction 2015 (PDF Report)
Creamer Media’s Real Economy Year Book has been divided into individual reports under the banner Real Economy Insight and investigates key developments in the automotive, construction, electricity, road and rail, steel, water, coal, gold, iron-ore and platinum sectors.
Real Economy Insight: Electricity 2015 (PDF Report)
Creamer Media’s Real Economy Year Book has been divided into individual reports under the banner Real Economy Insight and investigates key developments in the automotive, construction, electricity, road and rail, steel, water, coal, gold, iron-ore and platinum sectors.
Real Economy Insight: Road and Rail 2015 (PDF Report)
Creamer Media’s Real Economy Year Book has been divided into individual reports under the banner Real Economy Insight and investigates key developments in the automotive, construction, electricity, road and rail, steel, water, coal, gold, iron-ore and platinum sectors.
 
 
 
 
 
This Week's Magazine
Alternative funding models could be expected to begin coming to the fore in South Africa’s renewable-energy sector as the market becomes more competitive and domestic development finance institutions (DFIs) begin scaling back their direct involvement in projects....
DIMITRI MARKOULIDES An innovation champion must involve employees in innovation projects and keep them updated to enable them to support and drive innovation and create the future of the business
An innovation champion course that trains executives to manage innovation in their organisations aims to help companies grow revenue streams and tap new markets, says business change management consultancy BMGI South Africa innovation practice lead Dimitri...
Future digital workplaces will require employees to continuously learn new “literacies”, including new media, information and technical skills, to help their company thrive and spur personal growth. Information technology (IT) research firm Gartner, thus, suggests...
Only 25% of large construction projects surveyed in KPMG’s Global Construction Project Owner’s Survey, released in June, were concluded on time and within budget over the last three years. “Every project owner wants predictability when it comes to large projects, and...
The R27-billion Gautrain project has contributed around R20-billion to the provincial gross domestic product (GDP) over the six years it took to build the rapid-rail link, notes a KPMG Gautrain economic impact report. Construction also sustained 121 800 jobs, and...
 
 
 
 
 
 
 
 
 
Alert Close
Embed Code Close
content
Research Reports Close
Research Reports are a product of the
Research Channel Africa. Reports can be bought individually or you can gain full access to all reports as part of a Research Channel Africa subscription.
Find Out More Buy Report
 
 
Close
Engineering News
Completely Re-Engineered
Experience it now. Click here
*website to launch in a few weeks
Subscribe Now for $96 Close
Subscribe Now for $96