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HONG KONG: Time for Power Companies to Lead the Energy Revolution for a Sustainable City

Photo - illustration: Pixabay
Photo-illustration: Pixabay

Reading the coverage of the latest Scheme of Control Agreements (SCAs) between the Hong Kong government and the power companies, you would be forgiven for thinking the rate of return was the only point at issue.

But the real question is whether consumers will be given the necessary incentives to produce and save energy. Power production is the source of almost 70 per cent of our greenhouse gas emissions. The environmental provisions in the agreements are important weapons against climate change. Their success will determine if our city can join the solar power revolution.

Previous SCAs largely failed to deliver. With the introduction of a feed-in tariff rebate, the new agreements could mark a turning point for renewable energy. The tariff encourages consumers to produce renewable energy. Power firms pay businesses and households that invest in solar a long-term, pre-announced price for the energy they generate. The Legislative Council environmental affairs panel last month discussed the government’s Climate Action Plan 2030+. Let’s set a renewable target: 10 per cent by 2030 so Hong Kong can inspire all with its resolve.

Agreement has yet to be reached on the level of initial rebate the utilities will offer customers. It is time for a frank debate on who can benefit, what technologies are included and the process for applying. The government last week agreed with legislators and the WWF that the level of feed-in tariffs needs to be sufficient to reward investors, and agreed to publish information on how the rates will be set.

The government and power companies will no doubt be studying the feed-in tariff schemes in the UK, Germany and Taiwan, where rebates for small-scale rooftop solar installations were initially around three to four times the prevailing electricity tariff. These provided pioneer investors with the confidence to invest. Rates swiftly fell to below retail price as the industry matured. We know from our experience of installing solar panels in homes in Tai O that it would require a feed-in tariff rate of at least HK$4 per unit for a reasonable payback. It’s a fair rate to become Asia’s most sustainable city.

Photo – illustration: Pixabay

Our study on the cost of Hong Kong adopting solar power shows introducing German or British style feed-in tariffs would, at worst, add HK$20 a month to consumers’ bills, if six per cent of the city’s power were supplied by small-scale solar. This could be absorbed by the power companies. The new SCAs also include a welcome innovation of setting up a system of renewable energy certificates that lets customers buy “green” power without having to install it. We can all join the solar revolution.

The SCAs include new initiatives to encourage power companies to improve customers’ energy efficiency. Despite the idea’s “putting Dracula in charge of the blood bank” feel, experience in other markets shows that, given the right policy framework, such firms are well positioned to deliver energy efficiency to customers.

Decentralised renewables and energy efficiency have been highly disruptive to power companies across Europe. One big challenge is how to align their business models to make low-carbon power profitable. In the next 12 months, as the SCAs’ provisions are debated, we urge the power companies to justify their unique place in our community and history, and help their consumers to decarbonise.

We need to meet our “climate ready” goal of ensuring a 26-36 per cent reduction in greenhouse gas emissions. Our government has so far been very generous to the power companies. Having conceded an 8 per cent rate of return and postponement of competition with the SCAs, the government, community and planet deserve that environmental goals are delivered.

Source: scmp.com

Bangladesh Plans 1.6 Gigawatts Of Solar Projects

Photo-ilustration: Pixabay
Photo-illustration: Pixabay

Bangladesh is planning to to set up some large-scale solar power projects, the biggest in its history, as it looks to diversify its energy mix and enhance self-sufficiency in the energy sector.

According to media reports, the Bangladesh Economic Zone Authority (BEZA) is planning to set up a solar zone which would house the country’s largest solar power project. BEZA is in talks with POWERCHINA to set up a solar power park with total capacity of 1 gigawatt. BEZA is expected to develop a fourth of the capacity, while POWERCHINA would likely develop the balance.

BEZA is also reportedly planning to give away some land to the Bangladesh Power Division to set up 600 megawatts of solar power park.

Bangladesh has virtually no utility-scale solar power projects and its power sector is heavily skewed towards thermal power technologies. Additionally, the country is also dependent of electricity imports from neighboring India.

The government has taken some steps to attract foreign investment in the solar power market but no major progress has been reported on those initiatives so far.

A subsidiary of SunEdison signed an agreement with the government of Bangladesh to set up a 200 megawatt solar project. The power purchase agreement for the project was signed by Southern Solar Power. The company will set up the project in partnership with a local firm — Midland Power — which will have a 20% equity stake in the project.

The status of this project remains unknown given the bankruptcy of the SunEdison. There have been no reports about any company replacing SunEdison in the partnership with Midland Power.

In 2015, SkyPower announced plans to build 2 GW of utility-scale solar energy over the next five years in Bangladesh, representing an investment of US $4.3 billion. The company also announced it will be gifting 1.5 million SkyPower Home solar kits to the people of Bangladesh over the course of the next five years. “SkyPower’s $4.3 billion USD investment will create more than 42,000 total job years in Bangladesh and will include 500 MW of fabrication and assembly facilities,” said SkyPower Chief Commercial Officer, Charles Cohen.

The owner of India’s largest solar power project — Adani Green Energy — also recently expressed its intentions to set up large-scale solar power projects in Bangladesh. The company did not share any details but would likely be attracted by high feed-in tariffs available in Bangladesh.

These and the recent plans would be welcomed by environmentalists who have heavily criticized the Bangladesh government for its plans to set up a huge coal-based power plant in the environmentally critical Sundarbans. Bangladesh has announced plans to set up a 1,320 megawatt coal power plant in the world’s largest mangrove forest.

Source: cleantechnica.com

Solar Energy Corp Of India Launches Two Tenders For 750 Megawatts Of Solar

Photo-illustration: Pixabay
Photo-illustration: Pixabay

Following the massive success of two recent auctions at the Bhadla solar power park in the state of Rajasthan, the Solar Energy Corporation of India has announced two new tenders for the expansion of the solar park.

Solar Energy Corporation of India (SECI) will offer 500 megawatts and 250 megawatts through two tenders at Bhadla solar power through the viability gap funding mode. Project developers will be offered the projects at a fixed tariff of Rs 3.93/kWh (6.1¢/kWh) but will have to bid for the capital cost support needed from the government.

Developers, however, will also be free to quote tariffs lower than the benchmark and opt not to take any capital cost support.

The tenders have been launched under the phase II batch IV of India’s National Solar Mission. The SECI had announced a target to auction 5 gigawatts of capacity through the viability gap funding mode. It has so far auctioned 4.5 gigawatts of capacity, of which power purchase agreements have been signed for 2.5 gigawatts. Through these tenders SECI would achieve its target.

The benchmark tariff offered by SECI is at 61% premium to the current lowest tariff for solar power projects. In May this year, ACME Cleantech Solutions secured a project at the Bhadla solar power park at Rs 2.44/kWh (3.8¢/kWh); no capital cost assistance was offered in that auction.

Thus, the higher tariff on offer, along with the capital cost assistance, will act as a double bonanza for project developers. It would not be surprising if developers bid for lower tariff and no capital cost assistance.

We have seen extreme competition among project developers over the last few months in India. Tariff bids in India crashed 26% in a matter of just three months.

Acme Cleantech Solution (200 megawatts) and SB Cleantech (300 megawatts) were the winners in (Bhadla solar park) auction at a tariff of Rs 2.44/kWh and Rs 2.45/kWh (3.8¢/kWh), respectively. The massive jump in competition within two days is evident from the fact that Acme Cleantech Solutions reduced its bid from a losing one of Rs 3.36/kWh (5.2¢/kWh) in the 250 megawatts Bhadla auction to just Rs 2.44/kWh (3.8¢/kWh) for the 500 megawatts auction – a decline of 27.4% in a matter of two days.

Source: cleantechnica.com

India’s Kochi Metro System Will Get 25% Of Its Power From Solar

Photo-ilustration: Pixabay
Photo-illustration: Pixabay

Kochi Metro, recently launched in the Indian state of Kerala, will get a quarter of its total electric supply from solar power systems.

This makes the Kochi Metro project unique, as every station of the project and the coach maintenance yard will have rooftop solar power systems installed. Delhi Metro and Mumbai Metro are the other two prominent subway systems that use solar power.

All 22 stations of the Kochi Metro and coachyard will have rooftop solar power systems installed. The cumulative capacity of these system will be four megawatts and are likely to be partially operational by October this year.

The subway system signed a power purchase agreement for these rooftop systems at Rs 5.51/kWh, which is a highly competitive rate for rooftop projects.

More importantly, Kochi Metro did not have to make any substantial upfront investment in the rooftop systems. The systems will be set up through a RESCO (renewable energy service company) model wherein Hero Power Private Limited will invest Rs 27 crore. Kochi Metro also received 15% financial assistance from the Ministry of New and Renewable Energy for the project.

Many subway systems in India have moved to rooftop solar power systems, including Delhi and Mumbai. These systems will likely make a substantial contribution to India’s rooftop solar power target.

Delhi Metro has gone a step further. It has signed a power purchase agreement with one of India’s cheapest solar power projects. It will procure around 200 megawatts of power from the Rewa solar power park for 25 years at an average tariff of Rs 3.30/kWh (5.1¢/kWh). The tariff is cheaper than that of many thermal power projects in India.

Source: cleantechnica.com

Reports: Google Gears Up to Receive First Wind Power from Norway

Foto: Pixabay
Photo: Pixabay

Google-owner Alphabet Inc. has said it expects to begin receiving power by early September from what is expected to be Norway’s largest onshore wind farm, according to reports.

The US tech giant last year signed a 12-year deal to purchase 100 per cent of the output from the 160MW project, which is located in the region surrounding the ilmenite mines at Tellenes in the municipalities of Sokndal and Lund in Norway.

Once completed it will encompass 50 turbines and will be operated by Swedish renewables firm Arise.

Reuters reported last week that the project’s first turbine is expected to start generating power this month with the energy initially being sold on to the Nord Pool power exchange.

However, from September, all the power from the wind farm is expected to be used to help power Google’s four European data centres in Finland, Belgium, the Netherlands, and Ireland.

A Google spokesperson told the news agency the firm plans to purchase power from the wind farm as soon as it becomes fully operational “which we expect will take place in early September 2017”.

Meanwhile, Google has also reportedly bought the future output of a 22-turbine wind farm in Sweden, which is due to start operations in 2018 and will bring the total capacity of the tech giant’s renewable power purchases in Europe to 500MW.

Google and parent company Alphabet have been investing heavily in renewables in recent years, and in May Google teamed up with energy supplier E.ON to launch a solar power drive in Germany in order to help simplify and streamline the process for identifying the best rooftop solar sites.

The deals are part of a major trend that has seen a raft of Blue Chip firms, including many of the world’s tech giants, commit to sourcing 100 per cent renewable power over the coming decade.

Advocates of the renewables argue they offer corporate customers financial as well as environmental benefits, as projects allow them to sign long term contracts at guaranteed prices that hedge against future energy price volatility and potential increases in carbon taxes.

Source: businessgreen.com

Gujarat, India, Floats 1 Gigawatt Renewable Energy Tender

Photo: Pixabay
Photo: Pixabay

Perhaps for the first time, the Indian state of Gujarat will auction renewable energy projects under its state policy when it puts on the block 500 megawatts each of solar and wind energy capacity next month.

Gujarat Urja Vikas Nigam Limited (GUVNL) recently issued a request for selection documents for 500 megawatts of solar and 500 megawatts of wind energy capacity. The capacity will be allocated through competitive auctions in mid-July. This will mark the first time Gujarat will auction utility-scale solar power projects, and the first time ever a state would auction wind energy capacity in India.

Gujarat is among the leading states in terms of operational solar and wind energy capacities, yet it has probably never auctioned any projects under the state policy.

Gujarat hosts India’s first and one of the largest solar power projects in the country — the Charanka solar power park. The state’s total installed solar power capacity stands at just over 1,250 megawatts. It is also among the leading states in terms of installed wind energy capacity at 5,339 megawatts.

Power generated from the projects allocated through the auctions will be sold to state-owned power utilities in the states for the fulfillment of the renewable purchase obligation.

Since Gujarat already has substantial renewable energy capacity operational it is very likely that these auctions could see highly competitive bids from project developers. Long-term PPAs with state-owned utilities would also give confidence to the bidders. Gujarat’s power utilities have been ranked among the best performing in the country by the central government’s Ministry of Power.

Public-sector companies will have 15% reserved capacity in solar as well as wind energy tenders. This could possibly mean that 75 megawatts of solar power capacity could be based on Indian-made panels.

Source: cleantechnica.com

South Africa’s Renewable Energy Future At Crossroads Again

Photo - ilustration: Pixabay
Photo-illustration: Pixabay

South Africa’s power utility Eskom has once again refused to sign power purchase agreements with renewable energy project developers, and this time it seems to have the complete backing of the government.

Recently, an inter-governmental team informed the South African Parliament that Eskom is facing some challenges which are preventing it from signing PPAs with renewable energy project developers who had secured projects through competitive auctions.

One of the challenges, as quoted by the team, is oversupply in the grid. This directly highlights the poor planning and foresight of the government which launched, and then expanded, the Renewable Energy Independent Power Producers Procurement Programme.

With its decision not to sign PPAs with planned projects, investments worth $4.45 billion is now stranded. This is the second time that Eskom has backtracked from its commitment to sign the PPAs.

In August last year, Eskom had refused to sign a PPA with a concentrated solar power project backed by SolarReserve with a capacity of 100 megawatts. The project has a tariff of 12.40/kWh and the agreement was supposed to be signed for a duration of 20 years.

Eskom openly stated that it will no longer sign PPAs with any renewable energy projects. The utility stated that there was excess renewable energy going into the grid, which has also increased the cost of power.

Eskom has also expressed concerns over the existing grid’s ability to absorb the new renewable energy projects. However, it received a loan worth $1.34 billion from African Development Bank (AfDB) for the expansion and strengthening of its transmission network.

In January 2017, the South African Renewable Energy Council threatened to drag Eskom to court over its refusal to sign PPAs with renewable energy project developers. There has been no recent update about whether such a lawsuit was ever filed.

In March 2017, energy ministry Tina Joemat-Pettersson said that Eskom would soon sign outstanding PPAs. But the utility missed a deadline set by the ministry.

Source: cleantechnica.com

Aldi Powers Up Solar Strategy with 96,000 Panel Pledge

Photo-illustration: Pixabay
Photo-illustration: Pixabay

Aldi is set to have installed 96,000 solar panels on its stores and regional distribution centres across the UK by the end of 2017, giving the discount retailer enough solar capacity to generate more than 17,500MWh of electricity a year.

The retailer said earlier this week it plans to install an extra 11,000 solar panels by the end of 2017 in order to hit the target, having already deployed 85,000 panels across nine distribution centres and 275 stores in the UK.

In total, Aldi said it will have invested £17m in solar power by the year end, saving 8,100 tonnes of CO2 per annum and generating enough clean electricity to power around 6,200 households.

“We are committed to reducing our carbon footprint and harnessing the power of solar energy is just one of the ways we’re doing that,” Mary Dunn, communications director at Aldi UK, said in a statement, adding that solar deployment is a key plank of the firm’s strategy to cut its greenhouse gas emissions by 30 per cent by 2020.

As part of the 2020 target, Aldi also said it is currently replacing all its chest freezers with greener models, working to cut food waste and using heat recovered from fridges and freezers to slash energy consumption elsewhere in its operations.

“While sustainability is important to us, this isn’t just about reducing our impact on the environment,” Dunn said. “Efficiency is at the core of our business model and green initiatives, such as generating our own electricity and reducing waste, help Aldi provide our customers with the lowest prices on great quality products.”

Source: businessgreen.com

Cutting the Cost of Ethanol, other Biofuels and Gasoline is Pretty Simple

Foto-ilustracija: Pixabay
Photo-illustration: Pixabay

Biofuels like the ethanol in U.S. gasoline could get cheaper thanks to experts at Rutgers University-New Brunswick and Michigan State University.

They’ve demonstrated how to design and genetically engineer enzyme surfaces so they bind less to corn stalks and other cellulosic biomass, reducing enzyme costs in biofuels production, according to a study published this month on the cover of the journal ACS Sustainable Chemistry & Engineering.

 – The bottom line is we can cut down the cost of converting biomass into biofuels – said Shishir P. S. Chundawat, senior author of the study and an assistant professor in the Department of Chemical and Biochemical Engineering at Rutgers University-New Brunswick.

Typically, the enzymes tapped to help turn switchgrass, corn stover (corn stalks, leaves and other leftovers) and poplar into biofuels amount to about 20 percent of production costs, said Chundawat, whose department is in the School of Engineering. Enzymes cost about 50 cents per gallon of ethanol, so recycling or using fewer enzymes would make biofuels more inexpensive.

In the United States, gasoline typically contains up to 10 percent ethanol and corn grain is the primary feedstock of ethanol, according to the U.S. Energy Information Administration. Biorefineries produce about 15 billion gallons of ethanol a year.

Photo-illustration: Pixabay

In the last few years, some refineries began converting the inedible parts of corn plants into ethanol, Chundawat said.

 – The challenge is breaking down cellulose (plant) material, using enzymes, into sugars that can be fermented into ethanol. So any advances on making the enzyme processing step cheaper will make the cost of biofuel cheaper. This is a fairly intractable problem that requires you to attack it from various perspectives, so it does take time – he said.

Biomass contains lignin, an organic polymer that binds to and strengthens plant fibers. But lignin inactivates enzymes that bind to it, hampering efforts to reduce enzyme use and costs, according to Chundawat.

The Rutgers and Michigan State University researchers showed how specially designed enzymes (proteins) can limit their binding to and inactivation by lignin. That would ultimately lower enzyme use and make enzyme recycling feasible for biorefineries in the near future, Chundawat said.

Source: sciencedaily.com

Tesla To Install World’s Largest Grid-Scale Battery In South Australia

Photo-ilustration: Paxabay
Photo-illustration: Paxabay

Tesla has announced that it will install the world’s largest grid-scale battery — 100 MW/129 MWh — in South Australia. The installation will be located in Jamestown in the north of the Australian state and will receive electricity to be stored from a wind farm operated by French energy company Neoen. Tesla broke the news late yesterday and CEO Elon Musk retweeted it out.

The story of how this project came to be is a fascinating tale. On September 28, 2016, freakishly high winds swept across South Australia, home to the city of Adelaide. The storm toppled a number of towers supporting the region’s high-voltage power lines, some of which connected South Australia to generating facilities in nearby Victoria. In the aftermath, members of the Australian government from the prime minister, Malcolm Turnbull, on down inexplicably blamed the blackout on too much renewable energy surging through its electrical grid.

This reaction came despite a statement by Australian Energy Market Operator, the grid operator, which categorically denied that renewable energy had anything to do with the blackout:

“There has been unprecedented damage to the network (i.e., bigger than any other event in Australia), with 20+ steel transmission towers down in the north of the State due to wind damage (between Adelaide and Port Augusta).

“The electricity network was unable to cope with such a sudden and large loss of generation at once.

“Australian Energy Market Operator’s advice is that the generation mix (i.e., renewable or fossil fuel) was not to blame for yesterday’s events — it was the loss of 1000MW of power in such a short space of time as transmission lines fell over.”

That statement was pretty clear, no? Nonetheless, it didn’t stop anti-renewables talking heads and media outlets from politicizing the unprecedented event.

Australia has enormous amounts of coal reserves, enough to meet its energy needs for 1,000 years. Some shortsighted leaders think it would be a great idea to dig up and burn all of that coal rather than fiddle around with newfangled ideas like wind turbines and solar panels.

Ever since last September, blackouts have afflicted the state of South Australia. That prompted Elon Musk in March of this year to offer to fix the area’s energy problem with a massive grid-scale battery. He boasted he could install such a system within 100 days of signing the necessary agreements. If not, the system would be free, Musk tweeted.

On July 7, Musk told the press in Adelaide that the project represented a significant challenge since it would be the largest grid-scale battery installation in the world “by a significant margin.” He added, “When you make something 3 times as big, does it still work as well? We think it will, but there is some risk in that. We’re confident in our techniques and the design of the system.”

Musk’s claim that the system will be 3 times larger than any other in the world represents a bit of hyperbole, something Musk is no stranger to. Tesla installed an 80 MWh system for Southern California Edison last year. That installation was completed in just over 90 days.

A Musk tweet today was more specific, indicating the tripling is in regards to power, not energy capacity.

To clarify, energy capacity (the MWh figure) is how much electricity the battery can store, whereas power capacity (the MW figure) concerns how quickly power can flow in or out of the battery. For more details on this topic, check out: “The Great ‘Power vs. Energy’ Confusion.”

Fed by the nearby wind farm, the Tesla battery system is expected to stabilize the grid and lower the price of electricity for utility customers.

“You can essentially charge up the battery packs when you have excess power when the cost of production is very low … and then discharge it when the cost of power production is high, and this effectively lowers the average cost to the end customer,” Musk said. “It’s a fundamental efficiency improvement for the grid.”

Tim Flannery of The Climate Council said South Australia was taking a leading role in Australia’s transition to renewable energy and storage technology. “South Australia is tackling climate change head on and should be congratulated for its innovation and leadership as it transforms our energy system into one that’s clean, affordable, efficient and secure. South Australians are witnessing first hand how swiftly this technology can be built and used, with the battery expected to be up and running this summer.

“South Australia joins the likes of California as a world leader in demonstrating how renewable energy and storage technologies can power our economy cheaply and cleanly. Renewables like wind and solar are now the cheapest power source available. We need to roll out this technology swiftly in a bid to tackle climate change.”

Source: cleantechnica.com

The End of the Combustion Engine? Volvo to Go All-Electric By 2019

Foto - ilustracija: Pixabay
Photo: Pixabay

Swedish carmaker Volvo has become the first traditional automotive firm to announce a full shift away from the internal combustion engine, as it today unveils plans for every Volvo car to have an electric engine from 2019.

In a move it described as a “new chapter in automotive history”, the company today promised that from 2019 all Volvo cars will either be fully electric, plug-in hybrid, or a “mild hybrid”, boasting a small petrol engine and a large battery.

“This is about the customer,” Håkan Samuelsson, president and chief executive, said in a statement. “People increasingly demand electrified cars and we want to respond to our customers’ current and future needs.”

The firm, which was bought by Chinese carmaker Geely in 2010, said it would also announce five fully electric new models between 2019 and 2021. Three will be manufactured under the Volvo brand and two under Polestar, the carmaker’s performance car arm.

Last month, Volvo confirmed Polestar would become a separate brand from Volvo, making high end EVs.

Alongside the new fully electric cars, a range of petrol and diesel plug-in hybrid and ‘mild hybrid’ 48 volt options will be available for all models.

“This announcement marks the end of the solely combustion engine-powered car,” Samuelsson added.

Today’s move provides more detail on how the carmaker plans to meet a target it set last year of selling one million electrified cars by 2025.

“When we said it we meant it,” Samuelsson said of the target. “This is how we are going to do it.”

As part of its original goal Volvo also promised to “promote acceptance” of EVs over the coming years by lobbying for more charging infrastructure and educating consumers on the benefits of the technology.

The global market for electric cars remains small, at just under one per cent of total new vehicle sales, but is growing rapidly. Across Europe registrations for new EVs grew 38 per cent in the first quarter of 2017, according to the European Automobile Manufacturers’ Association, and now command 3.2 per cent of the European market. Meanwhile, the US saw a 49 per cent jump in EV sales in the first quarter of 2017, according to Bloomberg New Energy Finance.

While Volvo is the first carmaker to announce plans to fully shift production away from pure combustion engine cars, many other major carmakers are pivoting their business models to focus more on the electric market. Jaguar, Audi, Aston Martin and Mercedes have all announced plans to launch new EV models in recent weeks, while Tesla has emerged as a global brand thanks to its focus on 100 per cent electric vehicles and clean energy.

Meanwhile, earlier this week Japanese carmaker Honda and Hitachi Automotive Systems announced plans to establish a new joint company focused on electric cars.

The company, backed with around five billion yen (£34m) of investment, will produce its own cars and sell electric vehicle parts to other carmakers.

Hitachi will have a controlling stake of 51 per cent of the new firm and Honda will have a 49 per cent share.

Source: businessgreen.com

Hopes of Mild Climate Change Dashed by New Research

Photo-illustration: Pixabay
Photo-illustration: Pixabay

Hopes that the world’s huge carbon emissions might not drive temperatures up to dangerous levels have been dashed by new research.

The work shows that temperature rises measured over recent decades do not fully reflect the global warming already in the pipeline and that the ultimate heating of the planet could be even worse than feared.

How much global temperatures rise for a certain level of carbon emissions is called climate sensitivity and is seen as the single most important measure of climate change. Computer models have long indicated a high level of sensitivity, up to 4.5C for a doubling of CO2 in the atmosphere.

However in recent years estimates of climate sensitivity based on historical temperature records from the past century or so have suggested the response might be no more than 3C. This would mean the planet could be kept safe with lower cuts in emissions, which are easier to achieve.

But the new work, using both models and paleoclimate data from warming periods in the Earth’s past, shows that the historical temperature measurements do not reveal the slow heating of the planet’s oceans that takes place for decades or centuries after CO2 has been added to the atmosphere.

“The hope was that climate sensitivity was lower and the Earth is not going to warm as much,” said Cristian Proistosescu, at Harvard University in the US, who led the new research. “There was this wave of optimism.”

The new research, published in the journal Science Advances, has ended that. “The worrisome part is that all the models show there is an amplification of the amount of warming in the future,” he said. The situation might be even worse, as Proistosescu’s work shows climate sensitivity could be as high as 6C.

Prof Bill Collins, at the University of Reading, UK, and not part of the new research, said: “Some have suggested that we might be lucky and avoid dangerous climate change without taking determined action if the climate is not very sensitive to CO2 emissions. This work provides new evidence that that chance is remote.” He said greater long term warming had implications for melting of the world’s ice sheets and the rise of sea levels that already threatens many coastal cities.

The reason the historical temperature measurements indicated a lower climate sensitivity than models or paleoclimate data is because the Earth has a fast and a slow response to increases in carbon emissions, Proistosescu said.

Land, mostly in the northern hemisphere heats up quickly. But there is also a slow response, he said: “This is mostly associated with warming over the oceans. They are big and full of cold water, especially at depth, and take a long time to heat up.” Furthermore, when the slow warming does kick in, it is likely to reduce the cloud cover that shades the Southern ocean and the eastern tropical Pacific, amplifying the heating.

The new research shows the 4.5C upper limit for climate sensitivity is real and means projections for global temperature rises cannot be reduced. The global temperature is likely to be 2.6C to 4.8C higher by the end of the century if emissions are not cut, according to the Intergovernmental Panel on Climate Change, or 0.3C to 1.7C if sharp emissions cuts begin in the next few years.

The world may already be seeing the increasing rises in temperature, said Prof Piers Forster at the University of Leeds, UK: “It may already be happening – the rapid increase in temperatures since 2014 could be partly due to the eastern Pacific catching up.”

Reconciling all the estimates of climate sensitivity has also shown that climate models are not flawed. “Historical observations give us a lot of insight into how climate changes and are an important test of our climate models,” said Prof Peter Huybers, a colleague of Proistosescu’s at Harvard University. “But there is no perfect analogue for the changes that are coming.”

Source: businessgreen.com

Sol Voltaics Raises $21.3m to Roll Out Solar Efficiency Breakthrough

Photo: Pixabay
Photo: Pixabay

Swedish solar technology firm Sol Voltaics has raised $21.3m to help commercialise its new technology for boosting solar panel efficiency, delivering the largest finance raise for a European solar technology company since 2015.

The cash will be used to accelerate the rollout of the firm’s solar efficiency technology, SolFilm, which it claims can boost the efficiency of a conventional solar panel by up to 50 per cent.

“This latest round of finance gives us the critical capital required to commercialize our efficiency boosting technology for the solar market,” said Erik Smith, Sol Voltaics CEO, in a statement. “I’d like to thank our investors, both existing and new, for backing our vision and helping bring this revolutionary technology to the mass market.”

Solar panels generally achieve efficiencies of roughly 20 per cent, depending on their manufacturer and the environment in which they are deployed.

SolFilm is a thin film technology that uses specially designed nanowires to help solar manufacturers deliver panel efficiencies of up to 27 per cent.

The technology is in the “final stages” of commercialisation, according to Sol Voltaics, with samples expected to be sent to partners by the end of next year.

Investors in the latest finance round include Norwegian firm Watrium AS, Blue Marlin AB, and Nano Future Invest. It takes the total raised for Sol Voltaics over the last 12 months to $38m.

Source: businessgreen.com

DONG Energy Signs 752 MW Wind Turbine Supply Agreement With Siemens Gamesa For Borssele 1 & 2

Photo-ilustration: Pixabay
Photo-illustration: Pixabay

Danish wind energy giant DONG Energy has announced that it has signed a contract with wind turbine manufacturer Siemens Gamesa for the supply of 752 megawatts worth of wind turbines for the Borssele 1 and 2 offshore wind farm set to be developed in the Netherlands.

DONG Energy was awarded the right to build the Borssele 1 and 2 offshore wind farm back in July of 2016, which would have a capacity of 700 megawatt (MW). Located 22 kilometres off the coast of the Dutch province of Zeeland in water depths between 14 to 38 metres. At the time, the strike price for the project was an impressive €72.70 per MWh, however, as we’ve seen of late, prices have only continued to fall.

Announced on Thursday, DONG Energy revealed that they had signed a contract with newly-merged wind turbine company Siemens Gamesa for the supply of 94 of its 8 MW wind turbines, the nacelles of which will be assembled in Siemens Gamesa’s new factory in Cuxhaven, Germany. Meanwhile, the blades for the turbines will be produced in Hull, England. Both Borssele 1 and 2 are expected to be completed and fully operational by the end of 2020.

“With the signing of the wind turbine contract, we pass a key milestone in this project, which will be a landmark in the Netherlands’ shift to renewable energy,” said Jasper Vis, Country Manager for DONG Energy Netherlands. “This is an important step on our way to reducing the cost of renewable electricity in the Netherlands.”

“We are pleased that DONG Energy has selected Siemens Gamesa for the Borssele1 and 2 offshore wind power plants in the Dutch part of the North Sea,” added Michael Hannibal, CEO Offshore at Siemens Gamesa. “The advanced model of our proven direct drive offshore wind turbine platform and our advanced services will leverage the energy output of this lighthouse project and help to move offshore wind into the energy mainstream in Europe.”

Source: cleantechnica.com

Study Of Owl Wings Could Lead To Quieter Wind Turbines

Foto-ilustracija: Pixabay
Photo: Pixabay

The owl is one of nature’s stealthiest hunters. It flies through the air at great speed but in nearly total silence, giving its prey no clue that it is about to become a midnight snack. Scientists in Japan and China were curious about how owls can fly without making a sound. Their conclusions may have important implications for the renewable energy industry by helping to tame the slight noise wind turbines make as their giant blades slice through the air.

“Owls are known for silent flight, owing to their unique wing features, which are normally characterized by leading edge serrations, trailing edge fringes and velvet-like surfaces,” says Professor Hao Liu of Chiba University in Japan. “We wanted to understand how these features affect aerodynamic force production and noise reduction, and whether they could be applied elsewhere.” The study was published this week in the journal Bioinspiration and Biomimetics. The findings could lead the way to quieter operation of wind turbines, propeller driven aircraft, and multi-rotor drones.

The research required the use of advanced computer modeling. It analyzed mathematical models of owl wings with and without leading-edge serrations using large eddy simulations used in computational fluid dynamics to simulate air flows. They also used particle image velocimetry and force measurements in a low-speed wind tunnel. Very sophisticated stuff and evidence of the hidden wonders of nature that are all around us, largely invisible to mere mortals.

The studies revealed that leading-edge serrations can passively control the transition between laminar and turbulent air flow over an owl’s upper wing surface at angles of attack between zero and 20 degrees, which means they play a critical role in aerodynamic force and sound production.

“We found, however, that a tradeoff exists between force production and sound suppression. Serrated leading edges reduce aerodynamic performance at lower [angles of attack] than 15° compared to clean leading edges, but can achieve noise reduction and aerodynamic performance at [angles of attack] above 15°, which owl wings often reach in flight,” Professor Liu reports.

“These owl-inspired leading edge serrations, if applied to wind turbine blades, aircraft wings or drone rotors, could provide a useful biomimetic design for flow control and noise reduction. At a time when issues of noise are one of the main barriers to the building of wind turbines, for example, a method for reducing the noise they generate is most welcome.”

I don’t know much about computational fluid dynamics, but I did find this stunning video of an owl in flight that clearly shows the leading edge of its wings in action. Frighteningly beautiful stuff that may help make wind turbines more amazing in their quietude and help them get located closer to population centers.

Source: cleantechnica.com

Welsh Water Invests £250m to Produce Green Energy

Photo: Pixabay
Photo: Pixabay

Welsh Water is investing £250m to help produce its own energy needs and cut its £44m annual utility bill.

It has agreed the figure in a loan with the European Investment Bank (EIB) to cover some of its investment costs.

Bosses are meeting in Wrexham on Thursday at a waste water works it is turning into an energy park.

It is investing £36m to harness solar and hydro power at Five Fords, Marchwiel.

The company said it was also developing an advanced anaerobic digestion plant on the site, which will use waste to generate enough energy to supply about 3,000 homes.

Welsh Water, which serves Wales and Herefordshire, generates 20% of its own energy needs through wind, hydro, solar and anaerobic digestion technology.

It said the majority of its power was spent on pumping water and waste water through thousands of miles of pipes.

It has pledged to invest £1.7bn in its businesses between 2015-2020.

Source: bbc.com