Month: September 2024

German Professor: Wake Effect Decreases Wind Farm Efficiency, Contributes To Warming

First mocked, then victorious: The turbine slipstream dispute

By
(Translated by P. Gosselin)

Professor Gerd Ganteför was called a lot of names when he reported on the so-called wake effect of wind turbines on the high seas in spring 2024. Wind turbines in wind farms not only take the wind away from each other, they can also have an impact on the wind behind the turbines up to 100 kilometers away.

In the meantime, the realization has also reached the windpark operators. The company Orstedt, which is heavily involved in so-called renewable energies, has some interesting results on its website. In a nutshell, it says that the turbines in the network deliver less yield, which means that the profitability per turbine decreases.

Overall, electricity production increases with more wind farms, but also the time until the investment per turbine pays off. The yield decreases if the calculated 4,000 – 4,500 hours of electricity generation per year are not achieved. The effect is likely to increase with more and more wind farms. It’s like a downward spiral. Let’s see what the German response to this is. It wouldn’t be surprising if it was to pay even more feed-in tariffs.

The size of the German areas is not the decisive factor. ‘Theoretically, much higher capacities than 70 gigawatts could be built there,’ says Martin Dörenkämper from Fraunhofer IWES in Oldenburg.

Admittedly, the wake effects would increase if the wind turbines were planned even closer together than they already are. But overall electricity production would still increase, even if the yield per turbine were lower. The question is therefore not whether Germany has enough space for 70 gigawatts, but how many terawatt hours of electricity can be produced each year – and at what price.

The higher the power density and the lower the yield per turbine, the more difficult it will be for the operator to refinance the construction and generate a return on investment.”

In his video, Ganteför explains that it is now possible to visualize the wake effect with the help of radar images from the Sentinel 2 satellite. In spring, he was ridiculed for this theory.

He points out that the wake effect can have various effects. On the one hand, there are the turbines on land, which could receive less wind, and the possible warming behind the turbines. Also there’s the influence of precipitation. Ganteför calls for more research in this area.

Two years ago, the Fraunhofer Institute Hereon already pointed out another problem. Another effect: disturbing the stratification of the water can have an impact on plankton production, i.e. the start of the food chain.

Another consequence of wake vortices is the reduction of shear-related processes on the sea surface. In other words, the turbulent mixing of the water surface caused by the winds is reduced for dozens of kilometers around the wind farm.

Water is usually stratified, e.g. a layer of warmer water lies on top of a layer of cold water.

The natural stratification is disturbed by the wind farms. Due to the reduced mixing, a more stable stratification of the water is favored. This was particularly noticeable during the decline in summer stratification. The natural stratification of the water is particularly striking in summer and decreases towards the fall. In the area of the wind farms, however, a more stable stratification was calculated outside of the seasonal fluctuation.

What do the results mean for the North Sea?

‘The magnitude of the induced mean changes does not indicate serious local effects, but far-reaching structural changes are occurring in the system,’ says Christiansen. ‘The changes in currents and mixing are likely to affect plankton production and food web structure and may influence the functioning of protected areas. It is therefore important to take these consequences into account when developing marine protection concepts,’ says Prof. Corinna Schrum, and Hereon Institute Director. Schrum provides an outlook for the implementation of the results, adding that further studies are required to analyze possible feedbacks on the air-sea exchange. A change in this exchange has a potential impact on regional atmospheric conditions and ecosystem dynamics and will be the subject of further studies.”

That doesn’t sound like settled science at all.

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September 18, 2024 at 08:40AM

The UN and the Biden Administration Want Net Zero for the U.S.—While China Opts for Energy Realism

By Rupert Darwall

September 16, 2024

Six days after this November’s presidential election, the annual United Nations climate change talks will take place in Baku, Azerbaijan. Unlike the election, no one is holding their breath. Baku will be the twenty-ninth in the series. Climate change regularly draws gatherings of world leaders like no other. When the U.S. president shows up, everyone who is anyone turns up, too. These events often represent milestones in the upward ascent of global climate action. In the beginning, there was the 1992 Rio Earth Summit, attended by President George H. W. Bush. Then came the Kyoto Protocol, with President Bill Clinton shrewdly sending Vice President Al Gore to Japan. The 2009 Copenhagen climate summit (attended by President Barack Obama) is memory-holed; that’s when China, along with India, Brazil, and South Africa, vetoed a binding climate treaty, redeemed by the 2015 Paris climate agreement (President Obama again).

Yet the only year that matters for climate realism is 2006, the year of the great cross-over, when China’s emissions of carbon dioxide overtook those of the United States. This helps explain why China wielded its veto three years later at the Copenhagen climate summit. By 2019, America’s carbon dioxide emissions had fallen by 875 million metric tons from their 2005 peak. Over the same period, China’s rose by 3,511 million metric tons. Twelve years of falling American carbon dioxide emissions were erased by three years of rising Chinese emissions.

Source: https://ourworldindata.org/co2-and-other-greenhouse-gas-emissions

This leads to a reality check about America’s climate policy as practiced by Presidents Obama and Joe Biden. In terms of the amount of human-induced carbon dioxide going into the atmosphere, what America does or does not do is of decreasing significance. The emissions math nullifies the claim of solipsistic climate activists that unless the U.S. drives its emissions towards zero, various forms of climate catastrophe will be visited on Americans. But here’s the rub: even though America’s emissions account for a rapidly declining proportion of global emissions, the negative economic impact of climate policy on the U.S. economy, on jobs, and on Americans’ standard of living is growing.

The U.S. could learn from the example of Britain, the poster child of climate leadership. It was the world’s first major economy to adopt binding emissions reduction targets when parliament passed the Climate Change Act in 2008. Initially, the Act required an 80 percent reduction in greenhouse gas emissions by 2050. In 2019, the target was raised to 100 percent by 2050, a target that the Biden administration also adopted in 2021. As in the U.S., the prime target for decarbonization is electricity generation, to be achieved in Britain through a mix of cap-and-trade; huge subsidies for wind and solar power, funded by consumer levies rather than by the taxpayer; and anti-coal regulations, a strategy also adopted by the Obama and Biden administrations.

As a laboratory for net zero, Britain’s experiment with renewable energy provides unambiguous evidence that wind and solar increase the cost of electricity. Although the cost of coal and natural gas used in Britain’s power stations was flat between 2009 and 2020, residential electricity rates in Britain soared by 67 percent, to 17.9p (23.4¢) per kilowatt hour (kwh) – 75 percent more than the average 13.5¢ per kwh American household paid in 2020. These increases were driven by a near tripling of environmental and social levies and increased spending on the infrastructure needed to connect far-flung wind farms to where people actually live and work.

Forcing electricity customers to pay for the extra grid infrastructure and the costs of covering for the intermittency of renewables when the sun doesn’t shine and the wind doesn’t blow can make renewables stupendously profitable for investors. Over the period 2009 to 2020, Britain’s Big Six energy companies received an average price of £112.81 ($147.78) per megawatt hour (MWh) from their renewables portfolio – twice the average £56.22 ($73.65) price per MWh from their coal- and gas-fired power stations. Breathtakingly high renewable profits meant that in one year (2017), renewables’ £54.93 ($71.96) profit per MWh was higher than the £52.47 ($68.74) average price per MWh that the Big Six earned from their thermal power stations.

Aggressive use of carbon taxes to penalize fossil fuel power generation and force coal off the grid (“powering past coal”) saw the Big Six incur £1,603m ($2,100m) in losses and write-downs on their coal and gas power stations in 2014. Over-rewarding renewables led to over-investment in renewables and nearly zero investment in new power stations needed to keep the lights on. In 2009, Britain had 18.6 gigawatts (GW) of non-intermittent (i.e., reliable) generating capacity for every 1 GW of intermittent (i.e., unreliable) wind and solar. Eleven years later, that had fallen to 1.7 GW of non-intermittent capacity for every 1 GW of wind and solar, a dangerous level that will worsen unless and until Britain abandons net zero.

To try and address wind and solar intermittency, the previous government created a capacity market so that power stations get paid for making their capacity available on demand. Capacity markets turn out to be an astonishingly expensive way of generating electricity. In 2020, electricity consumers paid an average of £224.31($293.85) per MWh to German-owned Uniper for electricity from its coal-fired power stations. This illustrates one reason why a renewables-heavy grid produces more expensive electricity. It requires having two parallel generating systems – intermittent renewables and firm back-up. This is reflected in the deteriorating capital efficiency of Britain’s grid. Between 2009 and 2020, each GW of generating capacity produced 28.5 percent less electricity than it had eleven years earlier because of the influx of wind and solar capacity.

Producing less energy with more capital is the essential fact of the energy transition. This reverses the economic growth paradigm since the onset of the Industrial Revolution. Improved capital productivity – getting more from less – alongside higher labor productivity and product innovation is a key driver of long-term economic growth. In capitalist economies, capital, just like labor and other inputs, is a real cost. Yet the metric commonly used to compare renewables and non-intermittent power stations, the Levelized Cost of Electricity, excludes the negative impact of adding more renewables on the capital efficiency of the whole system – one reason why claims about renewables being cost-competitive should be treated with a pinch of salt.

Having more renewables not only pushes up costs but also has the countervailing effect of degrading the value of the electricity they generate. Because renewables have no fuel input costs, on days when there’s lots of wind or sun, wholesale electricity prices trend towards zero. The way wholesale electricity markets work is that all generators supplying electricity into the grid at the same time get the same wholesale price. The effect of renewables on electricity prices is to kill new investment in conventional capacity.

For this reason, Britain’s decision to power past coal left the country dangerously ill-prepared when Vladimir Putin began to squeeze the price of natural gas ahead of his invasion of Ukraine in February 2022. That year, the average price paid by power stations for natural gas was more than five times higher than it had been two years earlier and 72 percent higher than the cost of coal, pitching Britain into its first energy crisis since the 1970s.

The Obama administration also waged war on coal with environmental regulations. America escaped a similar fate as Britain for one reason only. In 2008, the price of natural gas for power generation had reached $9.26 per thousand cubic feet (tcf); in 2012, it had fallen to $3.54 per tcf. This had nothing to do with Obama’s foresight and was entirely due to fracking and the shale revolution. Despite this fall, coal remains the cheapest source of fuel for power generation. In addition to being cheaper, coal does not require specialized pipeline and storage infrastructure, unlike natural gas. For these reasons, coal is the energy source of choice across the Global South, including China, which has a coal-based economy.

Although American coal consumption peaked in 2005, China’s coal consumption had already surpassed that of the United States by 1985. Since its 2005 peak, U.S. annual coal consumption has fallen by 500 million tons – and China’s risen by 1,245 million tons. The coal America did not burn, China is burning instead. For every one ton of coal that America stopped burning, China burnt an additional two-and-a-half tons.

Source: https://ourworldindata.org/fossil-fuels

In terms of policy, China is energy realism on steroids. Its bureaucrats are even having second thoughts about renewable energy. Writing in the Financial Times in July, contemporary historian Adam Tooze sees a “worrying” gap between the pace of China’s investment in renewable energy in recent years and its plans for the future. “Whereas China’s solar and wind industry installed almost 300 GW of new capacity in 2023, its National Energy Agency envisions a future build-out of barely more than 100 GW a year.” One reason for the slowdown, Tooze suggests, is that China’s energy bureaucrats point to the need for “more smoothly operating pricing systems to make a renewable system reliable.” If true, it would show that China’s communist bureaucrats have a surer grasp of the damaging economics of wind and solar energy than their Western counterparts.

The current architecture of the UN climate process was designed around China’s demands. Its veto of a climate treaty with a legally binding emissions target at the Copenhagen climate conference led the Obama administration to enshrine the Sinatra doctrine of climate action in the 2015 Paris climate agreement: the signatories would do it their way. China’s nationally determined commitment under the agreement has the goal of achieving “carbon neutrality” before 2060. The evidence to date shows that China does whatever advances China’s economic and ultimately its geopolitical interests. That is a lesson for America’s political leaders: if the United States wants to prevail in the geopolitical contest with China, it, too, needs to drop the Biden-Harris goal of net zero and embrace energy realism.

Rupert Darwall is a senior fellow of the RealClearFoundation and author of  The Folly of Climate Leadership: Net Zero and Britain’s Disastrous Energy Policies.

This article was originally published by RealClearEnergy and made available via RealClearWire.

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September 18, 2024 at 08:06AM

Copley DCNN 2122 – Snow Business

54.62360 -1.86919 Met Office Assessed CIMO Class 4 installed 1/12/1995

I feel it is important to see the above local image prior to the Google aerial image below to put this site into context.

Firstly I must clarify I have no intention to disparage the obviously diligent amateur meteorologist who originally installed this manual reporting site and maintains its recording. However, the responsible authority is the Met Office who chose to adopt this site’s data back in 1995 and continue to use it.

There are some rather obvious questions to ask and observations to make but firstly this site has regular “celebrity” status – Copley is billed as the snowiest place in the England and that record has more “Implications“.

The Guardian newspaper recently picked up on Copley and the issue regarding the removal of universal Winter Fuel Payments to pensioners.

There are obvious social/political issues to the withdrawal of such payments that are outside of the remit of my assessing Met Office stations, however, there is one rather puzzling issue that reflects rather badly on the data which the Met Office supplies from poorly sited locations.

Clearly the Met office accepts the weather is harsh in Copley and highly likely to be a location for residents to eligible to receive cold weather payments for those vulnerable people on certain means tested benefits in severe weather. They also have a weather station, in Copley, that records those events. Unfortunately the Copley site is NOT deemed acceptable to trigger such payments. A one hour and a quarter, thirty mile drive away in a much more benign location is the Bainbridge weather station. It is on this latter station that Cold Weather Payment averages trigger payments to Copley (Postcode DL13) residents.

A possible reason for the meteorological exclusion of Copley from such payment authorisation could well come down to the fact that it is a completely unsatisfactory location to record data for the climate record. In a back garden with all the various paraphernalia of normal life such as sheds. garden furniture, climbing frames, walls and tools, it simply cannot be regarded as representative of anywhere outside its own perimeter. If a Private Weather Station (PWS) were so poorly located, any readings would never be considered acceptable for any recording basis. Below are the site requirements that Cambell Scientific instruments advise for PWS siting.

Overview

Wind, air temperature, and water vapor pressure measurements are affected by surface type and roughness, soil moisture, regional topography, and obstructions. Sites selected for their applicability to a broader area should be free from obstructions such as buildings, trees, and steep slopes. Ten meter towers are often used to raise measurement heights above low-lying obstructions. The following table lists the suggested measurement heights and exposure (distance to an obstruction) for each type of sensor.

Suggested Measurement Heights and Exposure

Sensor Type Measurement Height or Depth Exposure Considerations
Wind 3 m ±0.1 m recommended (AASC)
2 m ±0.1 m, 10 m ±0.5 m, optional (AASC)
10 m (WMO & EPA)
No closer than ten times the obstruction’s height
Air Temperature & Relative Humidity 1.5 m ± 1 m (AASC)
1.25-2.0 m (WMO)
2.0 m for temperature only (EPA) 2 m & 10 m for temperature difference (EPA)
The sensor must be housed in a ventilated radiation shield to protect the sensor from thermal radiation. The EPA recommends the sensor be no closer than four times the obstruction’s height and at least 30 m from large paved areas.
Solar Radiation Height should be consistent with the exposure standard (AASC, WMO, EPA). To facilitate leveling/cleaning, CSI recommends installing at a height of 3 m or less. The sky should not be blocked by any surrounding object. However, objects <10° above the horizontal plane of the sensor are allowed.
Precipitation 1.0 m ±0.2 m (AASC)
30 cm minimum (WMO)
AASC & EPA suggest the sensor be no closer than four times the obstruction’s height. The orifice of the gage must be in a horizontal plane, open to the sky, and above the level of in-splashing and snow accumulation.
Soil Temperature 10 cm ±1.0 cm (AASC)
5 cm, 10 cm, 20 cm, 50 cm, 100 cm (WMO)
Measurement site should be 1 m² and typical of the surface of interest. The ground surface should be level with respect to the immediate (10 m radius) area.

Despite its almost celebrity status in national media the site is clearly not meeting any appropriate standards, not even the somewhat “optional” ones the Met Office seems to use.

And who is ultimately losing out? Apart from the longer term issues of an unreliable national temperature record, the local less affluent residents may not receive due payments because the Met office seem unable to supply an accurate weather station.

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September 18, 2024 at 05:32AM

Antarctic krill ‘valuable’ in the oceanic carbon cycle, say researchers

Ocean carbon cycle
Regardless of doubts over the climate fixation with trace gases in the atmosphere, the workings of nature’s oceanic carbon cycle are worth investigating. The study says ‘The carbon sequestration potential of open-ocean pelagic ecosystems is vastly under-reported compared to coastal vegetation ‘blue carbon’ systems’, and ‘it is likely that Antarctic krill is amongst the world’s most important carbon-storing organisms.’
– – –
Small marine crustaceans are as valuable as key coastal habitats for storing carbon and should be similarly protected, according to new research.

The study shows that a single species, Antarctic krill, store similar amounts of carbon to key ‘blue carbon’ habitats such as mangroves, saltmarshes and seagrasses, says Eurekalert.

However, krill are also impacted by global heating and potential overfishing, so should be considered for similar protections as other important habitats, say the researchers.

Krill are eaten by larger animals in the Southern Ocean around Antarctica such as whales, seals and penguins, but are also fished for food and fishing bait, and for use in aquaculture and dietary supplements.

Lead author Dr Emma Cavan, from the Department of Life Sciences at Imperial College London, said: “For the past decade we have been piecing together the role krill have in carbon cycling, finally resulting in this amazing finding that krill, and their poo, store similar amounts of carbon as some coastal marine plants.

“I hope this means we can now work towards conserving krill and their valuable Southern Ocean ecosystem with the same gumption as we are seagrasses and mangroves.”
. . .
Serious value

Marine life has an important role in locking carbon away from the atmosphere in ocean systems, and the term ‘blue carbon’ was coined over a decade ago to describe the important role of coastal marine plants in this process.

However, the ocean has other ways to store carbon, away from the coasts, and one of these is through animals like krill. Krill are small (around 6cm) but extremely numerous crustaceans that live in the Antarctic seas.

They eat phytoplankton – microscopic plants that take carbon out of the atmosphere as they perform photosynthesis. When krill poo or moult their exoskeletons, the carbon they have absorbed sinks into the deep sea where it can stay for a very long time.

The new study shows that Antarctic krill lock at least 20 million tonnes of carbon into the deep ocean annually, which equates to $4-46 billion of storage value, depending on the price of carbon.

Co-author Professor Angus Atkinson, from Plymouth Marine Laboratory, said: “Antarctic krill are well known for being at the centre of the unique Southern Ocean ecosystem and supporting an important fishery. But this study paints another picture of krill – on their key role in storing carbon.”

Krill power

The power of krill for storing carbon comes from their huge populations, forming swarms of up to 30 trillion individuals that produce showers of large, fast-sinking faecal pellets and other waste products.

Co-author Dr Anna Belcher, based at the UK Centre for Ecology & Hydrology, added: “One of the amazing things about krill is that they form massive swarms, which can be over a kilometre in length. This drives a huge ‘rain’ of krill poo after feeding, making krill globally important for locking carbon away from the atmosphere. So, let’s make sure we look after these amazing crustaceans!”

The study also revealed that the depths that these waste products need to reach to remain stored away for at least 100 years were surprisingly shallow (average depth 381 metres), further enhancing their potential. In combination, these factors make the carbon storage from krill similar to that from coastal blue carbon plant stores.

Full article here.
– – –
Image: The ocean carbon cycle [credit: IAEA]

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September 18, 2024 at 04:49AM