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Thermodynamic renwable energy technology - South Africa

7/14/2017

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Thermodynamic technology developer Heat Recovery Micro Systems owner Johan Enslin will introduce a disruptive new avenue for renewable-energy generation that can significantly lower electricity costs for power utilities and smaller decentralised power generating systems at this year’s POWER-GEN & DistribuTECH Africa.
The regenerative heat of solution (REHOS) thermodynamic cycle is the culmination of ten years of intensive research and development by Johannesburg-based Heat Recovery Micro Systems, and Enslin enthuses that the benefits of the technology will become a common form of power generation globally within the next few years.
​“Finding a solution that meets global demand for affordable, sustainable, baseload power generation with zero emissions has long been the ultimate goal for researchers globally,” says Enslin.
He adds that, with low-cost, emission-free, modular renewable power gaining popularity globally, there is huge demand for technology that can facilitate a rapid, but economically viable, transition from coal power generation to renewable-energy sources. “Heat Recovery Micro Systems has risen to the occasion by developing the REHOS thermodynamic cycle.”
Enslin explains that heat recovery of lower-temperature heat sources, typically below 200 ºC, such as geothermal and solar thermal sources, has led to the introduction of organic refrigerants as operating media in thermodynamic cycles. Up until now, however, waste heat at temperatures lower than 80 ºC has not been considered economically viable to convert to power on a large scale.
The REHOS cycle is a closed-loop binary cycle derived from absorption refrigeration principles. It uses existing, proven process components in a novel interconnected configuration to form a new thermodynamic cycle that is engineered to absorb ambient heat from the environment at below 70 ºC and convert it into power with high-energy conversion efficiency.
Enslin explains that, in essence, the REHOS cycle is a modified absorption refrigeration cycle, with the refrigeration effect replaced by a power turbine and external heat input achieved through using a heat pump.
The binary cycle comprises a pressure pump, heat exchangers, a vapour compressor and an organic turbo generator, all of which have been used for more than 20 years in the absorption refrigeration, geothermal and waste heat recovery power generation fields.
“The REHOS cycle is, thus, based on proven process components. The only novel aspect is the interconnected configuration of these components, which forms a new regenerative, thermodynamic cycle with many highly desirable disruptive attributes.”
Multiple Benefits 
Enslin stresses that the scalability of the REHOS cycle and the combination of refrigeration and power generation without the need for external cooling towers are some of the most significant features of this technology. The high heat-to-power conversion efficiency, as well as the flexibility of using different expander and compression equipment and heat exchangers in the REHOS cycle, also enhances its appeal.
This is a renewable power generation technology that uses freely available, globally abundant waste heat at temperatures well below 30 ºC, he says, adding that “the heat-to-electricity conversion efficiency is more than 80%, compared with current waste heat recovery systems for low temperatures, which struggle to maintain conversion efficiencies greater than 5%”.
In addition, Enslin highlights that the technology requires low capital investment and can deliver utility-scale power at less than half the cost of other renewable power generators such as wind and solar. The REHOS cycle is, moreover, a baseload generator, producing dispatchable power with a capacity factor of more than 80%, which compares favourably with other nonfossil baseload generators such as nuclear and hydropower generators.
The REHOS cycle may also be used for heat recovery from existing cooling water systems, effectively doubling existing power stations’ power output – or halving the primary fossil fuel energy consumption – to facilitate the gradual move from fossil combustion to renewables. Smaller REHOS generators can also be hermetically sealed for decentralised power packs for buildings, shopping centres, schools, hospitals and clusters of rural homes.
Enslin highlights that POWER-GEN & DistribuTECH Africa provides an ideal platform for networking with technology suppliers, consultants and end-users to ensure the best possible exposure of this new technology and facilitate its implementation.
“Despite its significant benefits, we expect some scepticism from the market, owing to the novelty of the concept and in lieu of a physically operational power-generation plant. However, we also expect a keen interest from consultants and power generation process suppliers, who will recognise the significant commercial value of the REHOS cycle. We believe that there will be a definite willingness from renewable power generation suppliers to participate in the project’s commercialisation.”
Enslin will present a paper, titled ‘Introducing the novel thermodynamic cycle for the economic power generation from recovered heat pumped from the huge global thermal energy storage reservoir called earth’, during the geothermal session of the Renewable Technologies and Opportunities track of the POWER-GEN & DistribuTECH Africa conference on July 18 at the Sandton Convention Centre in Johannesburg.

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The CSIR’s outlook for South Africa’s future electricity mix

11/4/2016

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In the absence of an update to the outdated national Integrated Resource Plan for Electricity, IRP2010-2030, the CSIR Energy Centre has presented its own study to re-optimise the South African power capacity and energy mix from 2016 to 2040. By CHRIS YELLAND, investigative editor, EE Publishers.

The CSIR study by Dr Tobias Bischof-Niemz, Jarrad Wright, Joanne Calitz and Crescent Mushwana was presented at the Windaba 2016 conference in Cape Town on November 3, 2016.
The capacity and energy mix re-optimisation by the CSIR takes into account the considerably lower electricity demand forecast for the years ahead, the significantly reduced cost of electricity from solar photovoltaic (PV) and wind capacity, and South Africa’s international commitments to constrain CO2 emissions following the country’s “peak-plateau-decline” objectives.
Following a similar modeling exercise, and using the same software platform as that used by the Department of Energy and Eskom planners to prepare the IRP, the CSIR study in effect does what the long-awaited 2016 IRP Update should have done ages ago.
As such, the CSIR presents what it calculates to be the re-optimised, least-cost mix for new electricity generation capacity technologies for the years ahead to 2040, taking into account and updating all the necessary economic, electricity demand, technology cost and other assumptions.

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EXCITING NEWS FROM POWERING AFICA

9/30/2015

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Powering Africa announces the availability of Financial Support for the acquisition of Alternative Energy for domestic and commercial use. Powering Africa, in promoting Alternative Energy, has partnered with Greenfin Finance to make it possible for many households to become less dependent on the State Utility.
It is now possible to purchase our equipment and pay for it on a monthly basis over a five year period. Given the annual increases for Electricity over the next five years, installing a Powering Africa Plug & Play System is an obvious "no brainer" Making provision for an alternative Energy Source is no longer "a nice to have gadget" around the house, but a "must have" in response to the monopoly of supply, and the frightening increase in cost in the years to come. For more information go to our Website and "click" on "Finance" or click on the image on the left.


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NEW SERVICE OFFERED
ENERGY AUDITS
Powering Africa, can now do a detailed analysis of your Energy Consumption for both Domestic/Commercial and Industrial Buildings, and recommend Turnkey Solutions to make you more "energy efficient". Long term savings in efficiency, coupled with alternative power sources will astound you. Do something about it today, call us for a quotation. 
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ENERGY SOLUTIONS FOR MEDIUM- AND RETAIL SIZED CONSUMERS

8/20/2015

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ENERGY SOLUTIONS FOR MEDIUM- AND RETAIL SIZED CONSUMERS
Early registration deadline: 11 September 2015!
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Registration
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UWC Energy Storage Innovation Lab researchers tackle SA’s energy crisis

5/9/2015

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The University of the Western Cape has merged expertise in advanced battery development, manufacturing and validation to form the new Energy Storage Innovation Lab (ESIL), launched on campus on 6 May 2015.

ESIL is the culmination of many years of research, development and innovation at the South African Institute for Advanced Materials Chemistry at UWC, especially in the field of Lithium-Ion and Sodium-Halide batteries, battery modules and integrated energy storage systems.

The strength of the lab lies in the development, validation and localisation of wide range energy storage systems for South African industry and communities. The lab also has an extensive network of energy storage developers, and manufacturing and system integrators from South Africa, China, India, USA, Germany and other countries.

Speaking at the launch, Dr Phil Mjwara, Director General of the Department of Science and Technology​​, noted that the partnership between UWC and DST is appreciated, and that ESIL’s technological innovations have a vital role to play in South Africa’s future..

“It is important for us to find these technologies in the marketplace in the future,” he said. “They need to be commercialised - and we will help with finding funding for these projects. It is very important to ensure the public will have their hands on them in the future as well.”

Eskom’s General Manager of Research Testing and Development, Barry MacColl, agreed. “These inventions are not only important for South Africa’s energy needs, but also for job creation in our country,” he said. “We hope to have a good partnership with UWC and DST for many more years.”

Energy storage can mitigate the negative effects of power outages, assist in improving national grid stability, and enabling South Africa to tap into its vast renewable energy potential, specifically from wind and solar sources.

Of course, for the inventions to have a real impact, they need to work - and they need to work at the right price. “Our sun quality is far better than California’s, and these products could rival those of Elon Musk,” MacColl remarked, invoking the South African-born tech entrepreneur who founded Tesla Motors and who has made significant advances in energy storage technology.

ESIL boasts high-tech battery integration and production facilities, and has been involved in the development of a number of advanced storage systems. ESIL’s modular battery system (MBS) is scalable and modular, with series and parallel connection capability, and is stackable and easily integrated for a range of applications, including (thus far) golf carts, battery electric vehicles, backup power solutions, off-grid power systems and grid-connected storage.

The production of pouch (15-20 Ah) and cylindrical cells (2 Ah) suitable for energy storage applications includes solar and wind applications. The lab also develops low-cost thermal cells for grid scale stabilisation and energy storage.

Professor Bernard Bladergroen, Head of ESIL, noted that with the current strain on the electricity grid in South Africa, and the growing deployment of renewable energy to meet energy needs while mitigating the effects of climate change, there is a clear need for reliable and cost-effective energy storage solutions.

“Now is the right time for customers, innovators, researchers and entrepreneurs in the energy storage arena to get together and work towards sustainable energy solutions,” he said.

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"Unused" South African Green fund

1/20/2015

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It is claimed a fund of more than R300m for renewable energy projects is unused at a time when the country is grappling with load shedding.
 
The unspent millions are stashed away in the Industrial Development Corporation coffers as part of the €40m (R559m) loan from the French Development Agency (AFD) being disbursed to successful applicants.
 
An official who declined to be named at the IDC said there were available funds for more renewable energy efficiency projects to be utilised.
 
The IDC is expecting about R150m of the money borrowed from its coffers to be paid back to the corporation by March. The money will be 
 
used to fund new projects.
 
“So the money falls under the Green Energy Efficiency Fund (Geef), the AFD and money that the IDC received as a loan from the German Development Bank. The Geef is the facility that remains underspent We have about R300m,” the IDC official said.
 
IDC PRO Mandla Mpangase disputed the figure said to have been unspent.
 
“To date, the IDC has funded a number of businesses who have implemented green energy initiatives. About R40m is still available. We plan to raise more capital to fund viable energy efficiency projects that provide significant energy savings.” 
 
He said they had spent R13.7bn funding 22 renewable projects.
 
“We have, in addition to concentrated solar power projects, supported a number of projects under government’s Small Renewable Energy Programme,” said Mpangase. 
 
The Department of Energy’s Independent Power Producer Programme has resulted in a number of success stories of renewable energy projects which includes, among others, three wind farms in the Northern Cape and one in Jeffery’s Bay in the Western Cape.
 
A number of renewable energy projects, which includes solar, wind and hydro power, are currently under way and are expected to help alleviate the country’s power problems over the next years.
 
While the focus is on smallscale renewable energy projects, the IDC also funds largescale projects but finances are capped at R50m.
 
“We have seen and funded plenty projects in the R10m-R20m region,” Mpangase said.
 
Green energy activists however feel that more coud be done to invest in renewable energy as an alternative.
 
“We are disappointed that Eskom and the Department of Energy continues to refuse to use the crisis as an opportunity to accelerate the renewable energy programme in South Africa. Renewable energy projects are coming online faster and, in some cases, cheaper than Eskom’s perpetually delayed coal plants to allow net metering and to expand the solar water heating programme,” Earthlife Africa’s Makoma Lekalakala said.
 
Environmentalists want an energy revolution that would speed up projects to attain at least 49% renewable energy by 2030.

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BNatrl Announces Partnership With All Green Energy To Market Renewable Energy & Water Products in South Africa

9/6/2014

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While best known for their advanced nutritional supplements, and emergency preparedness solutions, BNatrl is also well respected for their Off Grid brand, providing alternative energy and water solutions for off-the-grid needs. Their recent announcement that they have entered into an agreement with All Green Energy to sell renewable energy and water products in South Africa makes items available that are sorely needed in that region of the world. These items include: solar generators for eco-homes to provide power for small refrigerators, LED light bulbs, and to charge mobile phones, and portable generators for RV’s and camping. Their solar water generator produces potable water from the humidity in the air while powered by the sun.

The BNatrl Off Grid Water Generator has been viewed as a "Game Changer" in areas without natural access to clean water, or for use in a sudden emergency catastrophe. The Atmospheric Water Generator produces potable water from the moisture in the air by pulling in water vapor from the air, turning it into a liquid, and running it through a series of purifying filters before being deposited into a reservoir. The system also has a microcomputer which re-pumps the water through filters rather than allowing it to stagnate.

The BNatrl Off Grid Solar Power Generator was designed as an alternative to generators that use gasoline, propane or other fossil fuels for different emergency situations or remote operations. It is able to run any type of hand-held device or laptop as well as larger appliances such as refrigerators and washers. The system is very portable at around 40 lbs, and can be taken almost anywhere. It’s also silent, which should be taken literally, as it makes almost no noise, as well as no gas smells/messes or other harmful emissions.

During a recent press conference, the principals of this new partnership made comments as follows: Jacques Fullard of All Green Energy, had this to say: "There is tremendous potential for BNatrl's Off Grid products in South Africa; energy costs are rising rapidly and many areas of the country have inconsistent power, if any power at all, and many parts of South Africa and Mozambique also do not have access to clean water. BNatrl has developed products to address these needs at a low cost to fit the developing market." 

Lis Herrey, CEO of BNatrl: "BNatrl has come up with solutions to provide alternative energy and clean water at a low cost for developing areas in Africa, while also providing alternative energy and water products suitable for the middle class. We look forward to continuing to grow in Africa together with All Green Energy"

Bo Gustafsson, BNatrl’s Head of Product Development, "We continue to look for partnerships with NGOs, for-profit businesses, and government organizations in developing countries to innovate and create low cost products that meet the needs of the local population. All Green Energy is a great fit because of its complementary products and its network of alternative energy experts and architects working to implement green solutions. This partnership will enhance both of our offerings in the African market."

For complete information, please visit: BNatrl's Off Grid products



Read more: http://digitaljournal.com/pr/2167250#ixzz3CWDndo48

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