http://www.engineeringnews.co.za
  SEARCH
Login
R/€ = 16.31Change: -16.14
R/$ = 14.22Change: -14.07
Au 1292.99 $/ozChange: 1.84
Pt 1079.50 $/ozChange: 3.50
 
 
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 About Us
 
 
 
RSS Feed
Article   Comments   Other News   Research   Magazine  
 
 
Apr 23, 2004

Klipheuwel shows the way in renewable energy

Back
Africa|CoAL|Engineering|Eskom|Gas|Gearboxes|Generator|Generators|Industrial|Lighting|Power|Renewable Energy|Renewable-Energy|Resources|Solar|System|Systems|Technology|Turbines|Water|Africa|Energy|Maintenance|Systems|Wind Energy|Environmental|Turbines|Operations
Africa|CoAL|Engineering|Eskom|Gas|Gearboxes|Generator|Generators|Industrial|Lighting|Power|Renewable Energy|Renewable-Energy|Resources|Solar|System|Systems|Technology|Turbines|Water|Africa|Energy|Maintenance|Systems|Wind Energy|Environmental|Turbines|Operations
africa-company|coal|engineering|eskom|gas|gearboxes|generator|generators|industrial|lighting|power|renewable-energy|renewable-energy-company|resources|solar|system|systems-company|technology|turbines-company|water|africa|energy|maintenance|systems|wind-energy|environmental|turbines-person|operations
Most countries, including South Africa, currently rely on fossil fuels, such as coal, oil and natural gas, for energy.

These are nonrenewable, meaning they draw on finite resources that will eventually dwindle or become too expensive or environmentally damaging to retrieve.

In contrast, renewable energy resources, such as wind and solar energy, are constantly being replenished and will never run out.

Renewable-energy technologies are clean sources of energy that have fewer environmental consequences than conventional energy technologies.

Eskom has a long association with the implementation of renewable-energy technologies.

Thousands of rural schools, clinics and houses have been supplied with electricity from solar power, while extensive research has been conducted to diversify Eskom’s grid-connected supply. This is achieved through the cost-effective implementation of renewable energies such as wind, solar energy and hydroelectric power.

Wind turbines, like windmills, are mounted on a tower to capture the most energy. The kinetic energy of wind is used to turn a wind turbine to generate electricity.

The most advanced programme that Eskom’s research development and demonstration division is currently involved in is the R42-million Klipheuwel wind-farm research facility, near Cape Town, reports its research operations manager Dr Louis van Heerden He tells Engineering News that it is a 3,16 MW facility that is built around three different types of turbines. The Klipheuwel research station houses two Danish Vestas and one French Jeumont unit.

According to Van Heerden, the Danish units incorporate conventional induction generators with gearboxes, whereas the French unit has a permanent magnet synchronous generator without a gearbox.

Research on the potential of wind energy as an electricity-generating option is being conducted, as well as an evaluation of different wind-based technologies, and their economic viability.

“The aim of this demonstration facility is to introduce and expose the technology to the country, making people aware of how the facility works and what benefits it could provide if the plant is commercialised.

“Since the facility was commissioned in February last year, it has had 803 escorted visitors at the plant,” comments Van Heerden.

Eskom is currently analysing how the different types of technologies perform under South African conditions.

The research programme at the plant will run for three years. To date, it has noted that the two Danish units at the plant are more commercial and, as a result of this, they have experienced fewer teething problems than the French unit, he explains. The ongoing research at the plant is looking into turbine operational and maintenance issues, which are critical to understand when looking at any future forecasts or future planning for this technology.

Other ongoing research topics include looking at the vibration in the structure, the conditioning monitoring and the voltage control of the plant.

The Klipheuwel wind-farm has a total capacity of 3,16 MW and is expected to generate at a load factor of 20% to 26%.

Wind generators have an expected lifetime of at least 20 years, and the largest wind turbine at the plant, the Vestas V66, has the capacity to supply about 200 First World homes, or as many as 1 000 homes in deep rural areas, explains Van Heerden.

He says that, because the unit generator creates power from wind pressure, the voltage generated is not always constant and, therefore, it is not a stable supply of energy.

In an attempt to overcome this problem, Eskom installed a power quality device system, that was developed by the utility, which regulates some of the output generated by the turbines. This system is currently being tested at Klipheuwel.

After the three-year research has come to an end, the plant will either be handed over to Eskom Generation, which is currently the operator of the plant, to be operated as a commercial facility, it could be decommissioned or moved, Eskom could run it in partnership with another party, or it could be sold, acknowledges Van Heerden. These are all options; the final decision will be made based on the findings of the research.

Meanwhile, ocean waves are one of the world’s most abundant sources of renewable energy, essentially comprising a concentrated form of solar energy.

Ocean energy is energy that could be derived from waves, tides, currents or varying thermal layers in the ocean.

The ocean covers more than 70% of the earth’s surface, making it the world’s largest solar collector. Van Heerden notes that Eskom completed an ocean-energy-resource assessment in 2002.

“The study concluded that South Africa has a sufficient ocean resource available to explore this option further.

“Currently, a technoeconomic study and a technology evaluation are being performed. This study aims to identify those ocean energy conversion technologies that should be researched further for possible application in South Africa,” says Van Heerden.

Most renewable energy comes either directly or indirectly from the sun. Sunlight, or solar power, can be used for heating and lighting buildings, generating electricity and a variety of other commercial and industrial uses.

Van Heerden explains that there are currently about five solar-power technologies being researched around the world.

These include photovoltaic systems, concentrating solar systems, passive solar heating and daylighting, solar hot water and solar process heat, as well as space heating and cooling. He says Eskom is investigating two main groups of systems, namely solar and solar-thermal technology options.
Edited by: renay de

To subscribe email subscriptions@creamermedia.co.za or click here
To advertise email advertising@creamermedia.co.za or click here
 
Comment Guidelines (150 word limit)
 
 
 
 
 
 
 
 
Other Electricity News
The World Bank does not expect the recent rise in platinum prices to be sustained for the full year, with its latest ‘Commodity Markets Outlook’ report forecasting a 10% year-on-year price decline in 2016. The report, released on April 26, notes that precious metals...
Article contains comments
Public Enterprises Minister Lynne Brown argued in Parliament on Tuesday that, as a 60% offtaker of coal in South Africa, Eskom should be in a position to command better coal prices and lamented the fact that the State-owned utility’s coal costs were rising at levels...
Article contains comments
More
 
 
Latest News
Environmental Affairs Minister Edna Molewa
Cabinet has extended the contract of Department of Environmental Affairs (DEA) director-general Nosipho Ngcaba and approved the appointment of Limpho Makotoko as the new DEA COO.     “Under the leadership of Ngcaba, the DEA has consistently received clean and...
Mzwandile Masina
The Department of Trade and Industry (DTI) has invited companies to participate in a trade and investment mission to Ghana and Nigeria from August 8 to 12.   Companies in the agriculture and agroprocessing sectors, built environment professionals, automotive and...
Cabinet has approved the Industrial Policy Action Plan (Ipap) 2016/17 to 2018/19, which seeks to achieve a higher-impact industrial policy in difficult economic circumstances, including the difficulties faced by the domestic steel industry and the drought which has...
More
 
 
Recent Research Reports
Automotive 2016: A review of South Africa's automotive sector (PDF Report)
Creamer Media’s Automotive 2016 Report provides an overview of South Africa’s automotive industry over the past 12 months. The report provides insight into local demand and production, vehicle imports and exports, investment and competitiveness in the sector, as well...
Energy Roundup – April 2016 (PDF Report)
The April 2016 roundup covers activities across South Africa for March 2016 and includes details of a North Gauteng High Court Judge’s dismissal of a court application to postpone the 9.4% electricity tariff increase, which the National Energy Regulator of South...
Electricity 2016: A review of South Africa's electricity sector (PDF Report)
Creamer Media’s Electricity 2016 report provides an overview of South Africa’s electricity sector, focusing on State-owned power utility Eskom and independent power producers, electricity planning, transmission, distribution and the theft thereof, besides other issues.
Energy Roundup – March 2016 (PDF Report)
The March 2016 roundup covers activities across South Africa for February 2016 and includes details of the Department of Energy’s plans to announce the preferred bidders for the first tranche of the coal independent power producer procurement programme; the Council...
Steel 2016: A review of South Africa's steel sector (PDF Report)
Creamer Media’s Steel 2016 Report examines South Africa’s steel industry over the past 12 months. The report provides insight into the global steel market and and particularly into South South Africa’s steel sector, including production and consumption, main...
Construction 2016: A review of South Africa's construction industry (PDF Report)
Creamer Media’s Construction 2016 Report examines South Africa’s construction industry over the past 12 months. The report provides insight into the business environment; key participants; local demand; geographic diversification; corporate activity; black economic...
 
 
 
 
 
This Week's Magazine
The two spent-fuel pools at Eskom’s 1 800 MW Koeberg nuclear power station, in the Western Cape, will be full by 2018, increasing the urgency on the State-owned utility to begin pursuing alternative storage options. Koeberg has, over the past 32 years, accumulated a...
South Africa lacks the skills necessary to implement the government’s plan to build 9.6 GWe of new nuclear energy capacity, warns nuclear-qualified Quality Strategies International CEO David Crawford. “Apart from the concern about the affordability of the programme,...
DOROS HADJIZENONOS The 700-series devices provide network security monitoring, app control, URL filtering, VPN security, antivirus, antispam, antibot, and advanced intrusion prevention and detection functionality
Cybersecurity multinational Check Point has released its latest 700-series cybersecurity systems for small businesses, which draw on its international threat intelligence to provide up-to-date cybersecurity, says Check Point South Africa country manager Doros...
Daimler Trucks and Buses Southern Africa (DTBSA) saw a marked slip in new-vehicle sales in 2015 compared with 2014, with sales dropping from 5 897 units to 5 300 units. The decline came as the South African new truck and bus market declined from 31 558 units in 2014...
Group of 20 (G-20) economies threatened to penalise havens that don’t share information on their banking clients after the leak of the Panama Papers provoked a global uproar over tax evasion. The G-20 will consider “defensive measures” against financial centers 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 $149 Close
Subscribe Now for $149