Energy and enviroFiciency

The efficient use of energy; linking electricity and control to environmental issues.


 

Articles in this Section

Stabilising the power supply at Joburg’s Bara

Outreach Engineering’s ‘Heal Baragwanath’ project aims to improve the reliability of the power supply at the main operating theatre complex of the Chris Hani Baragwanath Academic Hospital in Soweto.
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Future of diesel-generated power

Manufacturers of diesel gensets are making steady technology gains that reduce capital intensity and emission levels and enhance power output and efficiency.
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Rapid African growth results in dire need to understand the Water-Energy-Food Nexus

Insight into the African growth story and the subsequent Water-Energy-Food nexus; the interdependence of resources and planning functions.
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Design and construction management technology for complex engineering facilities

Multi-D model technology was developed as a result of clients requesting a comprehensive approach to NPP designs as well as a digital model of all the processes and facilities.
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Dynamic structure of microgrids

Modelling electrical networks with the Object Oriented (OO) models proposed in this article - and the implementation of Dijkstra’s algorithm on it - will make microgrid management easier from many aspects.
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Generation III+ VVER nuclear reactors

The common name for the Water-Water Energetic Reactor (VVER) is Pressurised Water Reactor (PWR). It is the most widely used nuclear power reactor technology in the world today.
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Seeking cleaner and safer energy solutions

This article summarises a panel discussion that was co-hosted by SACSIS and the Friedrich Ebert Stiftung South Africa Office (FES) on 25 May 2015.
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Managing the UAV data explosion

Embedded database technology, such as the data management system described, provides a solution in challenging Unmanned Aerial Vehicle (UAV) applications.
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Lowering operational costs through optimised energy consumption

Effective energy consulting services allow operations to witness real savings in their actual plant environment.
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Instant data management enables smart grids to maximise power distribution efficiency

More people are using the power supply network causing multiple pressures.
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Climate change and the grid

Adaptation is necessary to adjust to the various effects of the planet’s evolution. A smarter, resilient grid could play a major role in adapting to climate change
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Uganda’s energy sector: challenges and opportunities

In the developed world, it has become a given that power from the electric grid must be available and stable. This, however, is still a dream in so many developing countries.
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New world of energy - Digital, local and consumer focused

The two main factors causing transformation in the energy world are − the introduction of information technology in the energy sector, and the emergence of alternative energy generation sources at scalable levels.
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Cities: People before Project

The Existing Building Performance Rating Tool for the Green Building Council of SA (GBCSA) promises to break the myth of going green equating to greater costs.
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Ester-based dielectric coolant for distribution transformers

Envirotemp FR3, the ester-based dielectric coolant for distribution transformers, is a fire-resistant ester-based dielectric coolant for distribution transformers.
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South Africa: Electricity pricing paralysing the poor

Eskom’s tariff structures and tariff increases have affected typical South African households –the poor, in particular.
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Karoo fracking… on our watch?

Factors to bear in mind when exploring the possibility of exploiting potential shale gas reserves in South Africa’s quiet, magical Karoo.
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Solar technology for vehicles is ‘r r revving’ up

One of the most popular challenges is the South African Sasol Solar Challenge to be held - this year from 27 September to 4 October.
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Cogeneration – utilising available energy otherwise wasted

Cogeneration is the simultaneous production of more than one type of energy from a single fuel source.
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Large scale solar water heating for Care Centre in KZN

A solar thermal system, designed for the Blessed Gerard’s Care Centre in Mandeni, KwaZulu-Natal, has reduced the carbon footprint as well as costs.
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Embedded databases help make grids smarter

Embedding controllers around a grid helps to measure power flows, demand requirements and leads to real-time management for best performance.
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Does South Africa have the talent to compete among the best young scientists in the world?

Eskom Expo inspires learners to discover their passion to explore.
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Where is the South African Photovoltaic (PV) market heading?

A recent survey by PV Insider on the commercial development and sustainability of the South African Photovoltaic (PV) market reveals surprising results.
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Environmental Thermodynamics - relationship between energy, emergy and biomass

Environmental Thermodynamics traces the relationship between energy and biomass and the transforming of one type of energy into another.
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12L - what it will mean to your company

Section 12L is a support mechanism implemented by government as an alternative to the Eskom rebates, to motivate the implementation of energy efficiency projects.
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Encouraging efficient utilisation of energy

The Regulation dated 9 December 2013 and the requirements it sets for claiming an allowance for energy efficiency savings, as well as what is not claimable, in terms of section 12L of the National Treasury, Income Tax Act No. 58 of 1962.
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To VSD or not to VFD … that is the question

The VSD has no moving parts - thus mechanical wear and tear is virtually non-existent - this ensures reliability and longevity.
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External costs of power generation

The social benefits of power so far exceed the social ‘external’ costs that one can conclude that power generation is well-merited, even from coal.
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Drivers for renewable energy – environment or economy?

The main argument from the developing world against exaggerated environmentalism appears to be an economic one. Governments and people generally do not support issues that they cannot afford.
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Copper: The ‘green’ material for energy efficiency

Copper, which has the second highest electrical conductivity of all metals, is essential for building the energy systems of the future.
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VSDs – power saving in cooling pump systems

By replacing conventional ac motor starter equipment with variable speed drives (VSDs) and a simple control system in plant, substantial energy savings can be realised.
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VSDs as electrical savings devices on centrifugal irrigation pumps

Wherever an electrical motor is in operation on a farm, the application of a variable speed drive as an energy saving device should be thoroughly investigated.
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Coega air separation plant

Emphasis on energy efficiency is vital in the design and operation of an air separation plant such as that recently developed at the Coega Industrial Development Zone in the Eastern Cape.
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Smart metering showcase - Nelspruit High School

A case study at a school in South Africa has smart metering showing that it is safer to trust technology than it is to trust people!
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Reduce energy wastage by minimising compressed air leakages

The wastage of electrical energy used to compress air for industrial applications has prompted the need for more compressed air management systems.
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Load-shifting opportunities for typical South African cement plant

A computer simulated load-shifting investigation on a South African raw mill produced favourable results – indicating that electrical costs could be reduced by shifting the loads of the raw mill to off-peak periods.
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Small-wind energy, reducing grid reliance

For properties not connected to the grid, reliability and efficiency are key for the end user.
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Journey to green technology in established structures

Retrofitting old buildings to make them modern, energy compliant structures could be considered a ‘journey to green’.
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Oxygen enrichment and cryogenics for rubber recycling

Rubber recycling methodologies and the use of oxygen enrichment are becoming popular in reducing carbon footprint.
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Sustainable energy efficient management

An aligned commitment between organisational behaviour at all levels is necessary if we are to subscribe to the new culture of energy efficiency in South Africa.
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The Green Hour

A community radio station in Port Elizabeth, South Africa, hosts a weekly one hour programme to create an awareness of the importance of conserving energy and protecting the environment.
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Solar thermal - on South Africa’s energy map

Solar could be a near-term solution for South Africa - the country with the most sophisticated solar thermal market in Africa.
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Fuel cell technology for enviroFicient ships

When discussing ‘emissions’… generally we tend to focus more on land emissions than those at sea. But what about emissions from shipping?
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Heating water in a geyser

There are three ways to heat water in a geyser: You can use an electrical resistance element, a solar collector or a heat pump.
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Passive design makes University residence enviroFicient

A highly effective system reduces this facility’s environmental impact by avoiding 450 tons of C02 and saving 600 980 litres of water annually.
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‘Peak Demand Management’

Benefit from the efficient use of the network and generation – without negatively affecting the environment.
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Solar water heating - Monash campus in South Africa

Sunshine on this university campus brings with it savings of approximately R400 000 in electricity annually!
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'Big picture' approach to saving energy

‘Baby’ steps are fine when it comes to saving energy… but there also has to be a big picture with long-term objectives.
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Lead and light the way

Eskom encourages customers to save energy – and takes internal steps to ‘lead and light’ the way.
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Sugar cane potential in Africa

Underlying reasons why the sugar industry in Sub-Saharan Africa (SSA) is diversifying into fuel and power.
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Wave energy machine

A milestone in wave energy, the Wave Star machine has been working day in and day out for more than three years with minimum maintenance.
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Benefits of renewable power for Africa

While carbon dioxide emission reduction does not carry the same punch for Africa as it does in developed countries, it does not mean that the renewable energy sector does not offer key benefits to the African continent.
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Energy management – exciting, challenging and evolving

The key challenge that engineers face when dealing with energy management issues is the careful balance between energy efficiency and production.
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Standards to achieve sustainability

Standards exist that point us in the direction of a ‘sustainable energy future’. Awareness of what is required, as well as training throughout a company or organisation, will help us achieve this ideal.
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Benefit from carbon trading by 31 December 2012

The Carbon Development Mechanism (CDM) is widely regarded to be the most significant outcome from the Kyoto Protocol, but is intrinsically linked with carbon credit and finance.
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Energy efficiency - a priority

Standards like ISO 50 001 (2011: Energy Management Systems Certification) have been developed with the purpose of encouraging, facilitating, developing and measuring the impacts of energy efficiency interventions, globally.
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Waste not... Convert garbage into fuel

Organic waste like bio-, municipal- and agricultural waste can be converted into fuel by a ‘laptop’ waste conversion plant.
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PV grid-tied system saves Bulembu

A town in the far North-West of Swaziland, Bulembu, was effectively shut down overnight when the Chrysotile mine closed in 2001.
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Nuclear power - on the agenda

A nuclear power conference, designed and chaired by nuclear physicist, Dr Kelvin Kemm, was held in Johannesburg in February.
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Nuclear power in South Africa - Why?

Nuclear power provides about 14% of the world’s electricity. In South Africa, 6% of our electricity comes from Koeberg, our only nuclear station, and 92% from coal.
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Income Tax Act-based allowances for energy efficiency

Part 1 explains the financial, technical and organisational support afforded by local government through the Income Tax Act of 1962 for energy efficiency tax incentives. Part 2 outlines the concurrent benefits of standardised energy efficiency practices.
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Energy savings - in comfort

Among the findings in a white paper on the measurement and management of energy performance in office buildings, there is confirmation of the ‘massive’ advancement of energy efficiency activity between now and 2020.
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Steps towards efficient footprint

One of the greatest challenges faced by the ‘Centurion Mall’ was that energy use was not being measured in real time and without this information truly efficient energy savings management was not possible.
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Electrical energy efficiency

The first prize in energy efficiency contributions comes from individual lifestyle changes.
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Charging to stop

Using an electric vehicle on a regular basis requires safe and easy-to-use charging installations.
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Aluminium smelting and the environment

As an extractive industry, the aluminium industry faces specific environmental challenges. Acknowledging these, the industry has committed itself to minimising environmental and climate impact.
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