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How electric cars and heat pumps can help Switzerland implement its energy strategy

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How electric cars and heat pumps can help Switzerland implement its energy strategy


According to a new report, heat pumps and electric cars could act as key flexibility providers for the Swiss electricity system in the future. Credit: Image generated with AI: Lea Rüfenacht / ETH Zurich

In the future, flexibly operated heat pumps and electric cars could reduce both electricity imports and electricity prices. That is according to a new study by a Swiss research consortium led by ETH Zurich.

Electric cars and could play a major role when it comes to implementing the Swiss Energy Strategy. The Federal Council is aiming for Switzerland’s energy supply to be carbon-neutral by 2050. The plan is for heat pumps to replace oil and gas-fired heating systems and for to gradually replace combustion vehicles. This will result in a significant increase in demand for electricity—from around 56 terawatt-hours (TWh) a year today to around 75 TWh a year by 2050.

A new report by the Swiss “PATHFNDR” research consortium, which is part of the “SWEET” program, has now shown that, alongside hydropower, heat pumps and electric cars could be key providers of flexibility for the Swiss power system in 2050.

Christian Schaffner, Director of the Energy Science Center at ETH Zurich and Deputy Director of the project, explains, “The two technologies serve to better coordinate rising with from renewable energy sources. This relieves the burden on the , reduces imports and brings down wholesale electricity prices—particularly in the winter months.”

Only consume if the grid is not at full capacity

This flexibility is apparent on an everyday basis. For example, at outdoor temperatures of 0°C, intelligently controlled heat pumps can switch off for up to 10 hours in buildings meeting the Minergie standard without a noticeable drop in room temperature. This helps to avoid having too many heat pumps running at the same time and overloading the grid.

Electric cars, too, are often connected to the grid for much longer than is necessary for a full charge—for example if they are plugged in to charge in the garage at the end of the working day. This allows for an optimum charging pattern that is in line with electricity supply. The study claims that the best thing would be to charge the car at work: “During the day, when the sun is shining, many vehicles are parked anyway. Charging them there would make optimum use of photovoltaic production,” explains Siobhan Powell, an energy researcher at ETH Zurich and one of the main authors of the study.

More electricity, less electricity imports

By 2050, Switzerland wants to cover 50 to 60% of its electricity demand (45 TWh per year) with new such as photovoltaics, wind energy or biomass. The researchers’ model calculations now show that this target will be easier to reach thanks to the flexible power consumption of heat pumps and electric vehicles.

If heat pumps and electric cars are coordinated and controlled flexibly on a nationwide basis, around 4% more renewable electricity could be available in Switzerland in 2050. “Most of this is solar power in spring and summer, which would be utilized more efficiently so that it does not need to be curtailed,” explains Powell.

Moreover, flexible heat pumps and electric cars could reduce net electricity imports by around 20% across the whole year, particularly due to higher net exports in spring and summer. “These amount to some 1.8 TWh of electricity, which is equivalent to the annual consumption of around 0.5 million Swiss households,” says Powell. According to the study, Switzerland’s electricity imports would also be reduced by around 0.7 TWh in the winter months. That corresponds to a 4.4% reduction in net imports in winter compared to an energy system without flexibly operated heat pumps and electric cars.

Cheaper electricity and fewer gas power stations

In addition, the study shows that wholesale electricity prices could also be lower due to a more even distribution of supply and demand with the help of flexible heat pumps and electric cars. This reduction in is greatest in the winter months of January to March, when wholesale prices could be reduced by up to 6%.

The researchers also estimate that an electricity system supported by flexible heat pumps and electric cars could be operated with around 4% lower costs than a system without these two flexibility providers.

Moreover, the use of flexibly operated heat pumps and electric cars would also mean the construction of fewer gas power stations and battery storage systems by 2050. Estimates show that the necessary investment in gas power stations and batteries would fall by around a third. “Above all, gas power stations and batteries are necessary to compensate for peaks in electricity demand. If electric vehicles and heat pumps take over this function, we’ll need fewer of them,” explains Powell.

Flexibility yes, but also convenience

According to a representative survey carried out as part of the study, about 70% of the Swiss population is willing to contribute to grid stability through flexible heating and charging, provided their convenience is not impacted and operation is automatic. About 30% of respondents even said they would accept minor inconveniences if this would bring down their electricity costs.

Lower peak loads in neighborhoods and reduced grid expansion

If a large number of households are charging their cars or running their heat pumps at the same time, there is a risk of bottlenecks in the distribution grid. Many of today’s power cables and transformers are not designed for these loads and would need to be reinforced.

The researchers analyzed about 50 grid areas in Switzerland and concluded that flexibly operated heat pumps and electric cars would reduce peak loads in neighborhoods and could therefore delay and reduce the need for expensive reinforcement work on distribution grids. The actual size of these effects also depends on whether the areas in question are urban or rural.

Electricity tariffs that reward citizens

So that electrical vehicles and heat pumps can actually act as flexibility providers by 2050, they must be equipped with the necessary control and communication technology. At present, this is not the case across the board. The authors of the study therefore recommend that further systems only be subsidized if they allow flexible and intelligent operation.

In addition, the operators of electric vehicles and heat pumps should be incentivized to change their heating and charging behavior. To this end, the study recommends measures including dynamic electricity tariffs that reward flexible charging and heating. However, significant local differences in tariffs and feed-in payments would hinder this measure’s implementation in Switzerland, states the study.

The researchers also point out that the promotional instruments in Switzerland are very heterogeneous and that there is, as yet, no national “right to charge” for tenants with electric vehicles—something they say ought to be resolved quickly.

More information:
Flexibility provision from electromobility and buildings – Synthesis Report (2025). DOI: 10.3929/ethz-c-000787060

Citation:
How electric cars and heat pumps can help Switzerland implement its energy strategy (2025, November 11)
retrieved 11 November 2025
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The Catastrophic Swatch x Audemars Piguet Launch Was Entirely Predictable and Utterly Avoidable

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The Catastrophic Swatch x Audemars Piguet Launch Was Entirely Predictable and Utterly Avoidable


The note from the communications team then, quite remarkably, lists some stats in an attempt to paint the launch in a positive light, as opposed the retail bin-fire it seemingly was: “We have received millions of clicks on our website. This new collaboration is literally making social media explode, with over 6 billion views within one week; by now, it is already 11 billion. All in all, the Royal Pop Collection is captivating the entire world, not least because the Royal Pop is, quite surprisingly, not a wristwatch.”

Audemars Piguet seems unhappy with how Swatch has handled the launch of its collaboration on the Royal Pop. AP told WIRED that “we understand the questions around the Royal Pop launch experience. As retail operations are handled by Swatch and their local teams, Swatch is best placed to comment on the operational handling of the launch. From AP’s perspective, safety and a positive experience for clients and teams remain the priority.” The brand did not respond when asked if it considered Swatch’s handling of the Royal Pop launch a “safe and positive experience”.

The madness of the Royal Pop launch is that, considering all that could have been learned from the MoonSwatch release in 2022, Swatch decided to repeat the playbook that went so badly wrong four years ago. This is a move, according to experts, that was entirely avoidable and utterly unnecessary.

Hype With No Control

“Luxury drops cannot rely on surprise, scarcity and social frenzy as the strategy, then act surprised when human behaviour follows,” says Kate Hardcastle, author of The Science of Shopping and advisor to brands including Disney, Mastercard, Klarna and American Express. “Retailers are already dealing with heightened tensions around theft, aggression and crowd management globally. Add a highly restricted product, long queues, resale economics, social media amplification and the emotional intensity attached to luxury access, and the environment can escalate very quickly if not expertly managed.”

Hardcastle confirms that what is particularly difficult for Swatch here is that the MoonSwatch launch already provided a live blueprint of the risks. “Once a brand has experienced scenes involving crowd surges, disappointment and policing,” she says, “the obligation shifts from reacting to proactively engineering a safer customer experience. Successful luxury houses increasingly control the experience with far greater precision.”

Neil Saunders, managing director of retail at Global Data, is even more candid. “The chaos does not reflect well on Swatch, and it probably makes Audemars Piguet wonder what on Earth it has gotten itself into,” he says. “Wanting to create some hype is understandable, but not being able to control it becomes damaging both commercially and for the brand image. Swatch should understand this better than most as it has been through this before with MoonSwatch.”

Not only Saunders and Hardcastle, but scores of commenters on Swatch’s Instagram post, point out well-known and obvious solutions that would have mitigated or entirely avoided the Royal Pop’s shambolic release.

“We have seen other premium or limited launches use staggered collection windows, verified appointment systems, geo-ticketing, VIP allocation tiers, timed QR access, private client previews and controlled queue technology to reduce volatility while preserving excitement,” says Hardcastle, adding that some combine digital ballots with curated in-store experiences so consumers feel part of an occasion rather than participants in a scramble.



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The Backward Logic of Chickenpox Parties

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The Backward Logic of Chickenpox Parties


Anyone who has had chickenpox shares one distinct memory: the relentless, all-consuming itch.

Ciara DiVita was only 3 years old when she caught the virus, but she remembers it well—along with the oven mitts she was made to wear to stop herself scratching. She also recalls being taken to hang out with her cousin while covered in blisters, in the hopes of deliberately infecting them.

DiVita, now 30, was actually the second in the chain, having been taken by her parents to catch chickenpox from an infectious friend. “I imagine the chain continued and my cousin gave it to someone else at a chickenpox play date,” she says.

A lot has changed over the past three decades, most notably the development of a chickenpox vaccine, meaning the virus is no longer the childhood rite of passage it once was.

Thanks to the vaccine’s success, children today are much less likely to be exposed to the infection at school or on the playground.

Chickenpox parties are also largely considered a relic of the past—a strategy many Gen X and millennial children were subjected to before vaccines became routine. But much like the virus itself—latent, opportunistic—they haven’t disappeared entirely.

Before a vaccine existed, chickenpox, which is caused by the varicella-zoster virus, felt unavoidable. In temperate countries like the UK and the US, around 90 percent of children caught the virus before adolescence (in tropical countries the average age of infection is higher).

It’s nothing to do with chickens. The splotchy, scratchy, highly contagious disease is possibly named after the French word for chickpea, pois chiche, according to one theory, because the round bumps caused by the virus resemble their size and shape. While most infant cases are mild, adolescents and adults are more likely to develop severe complications.

This is where the idea of “getting it over and done with” emerged from, according to Maureen Tierney, associate dean of clinical research and public health at Creighton University in Omaha, Nebraska.

“You were trying to have your child get the disease when they were at the greatest chance of not having complications,” Tierney says, explaining that, generally speaking, the older the patient, the more severe the infection can be.

While varicella-zoster is usually a mild, self-limiting disease in children, it can be much more severe—and sometimes life-threatening—in adults.

“I had an otherwise healthy adult patient who died of chickenpox pneumonia when I was first practicing,” Tierney says. “You never forget those scenarios.”

The virus spreads rapidly through respiratory droplets and contact with fluid from its characteristic blisters, meaning if one child contracts it, siblings and classmates are likely to be next, if unvaccinated.

Before the existence of social media, the idea that children should deliberately infect each other spread just as rapidly around communities—in conversations in the school yard, church groups, and pediatric waiting rooms—leading to the popularity of so-called chickenpox parties.

Parents swapped advice about oatmeal baths and calamine lotion and arranged to bring children together when one was thought to be infectious—despite the practice never being an official medical recommendation.

“They thought, well, if it’s going to happen to my kid anyway, it might as well happen in a controlled environment,” says Monica Abdelnour, a pediatric infectious disease specialist at Phoenix Children’s Hospital. “The families were ready to encounter this infection, deal with it, and then move on.”

While the majority of children who develop chickenpox feel well again within a week or two, around three in every 1,000 infected experience a severe complication such as pneumonia, serious bacterial skin infections, encephalitis (inflammation of the brain), or meningitis.



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A Danish Couple’s Maverick African Research Finds Its Moment in RFK Jr.’s Vaccine Policy

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A Danish Couple’s Maverick African Research Finds Its Moment in RFK Jr.’s Vaccine Policy


In 1996, Guinea-Bissau seemed like an ideal research post for budding pediatrician Lone Graff Stensballe. Her supervisor, a fellow Dane named Peter Aaby, had spent nearly two decades collecting data on 100,000 people living in the mud brick homes of the West African country’s capital.

Aaby and his partner, Christine Stabell Benn, believed that the years of research in the impoverished country had yielded a major discovery about vaccines—and what they described as “non-specific effects”: The measles and tuberculosis vaccines, which were derived from live, weakened viruses and bacteria, they said, boosted child survival beyond protecting against those particular pathogens.

But, the scientists said, shots made from deactivated whole germs, or pieces of them, such as the diphtheria-tetanus-pertussis (DTP) shot, caused more deaths—especially in little girls—than getting no vaccine at all.

The World Health Organization repeatedly and inconclusively examined these astonishing findings. They tended to elicit shrugs from other global health researchers, who found Aaby’s research techniques unusual and his results generally impossible to replicate.

Then came Donald Trump, Covid, and the administrative reign of anti-vaccine advocate Robert F. Kennedy Jr.

Suddenly, Aaby and Benn weren’t just sending up distant smoke signals from a far corner of the planet. They were confidently voicing their views and policy prescriptions online and in medical journals. The “framework” for “testing, approving, and regulating vaccines needs to be updated to accommodate non-specific effects,” their team wrote in a 2023 review.

And the Trump administration has taken notice.

“They became more strident in saying that their findings were real and that the world needed to do something about it,” said Kathryn Edwards, a Vanderbilt University vaccinologist who has been aware of Aaby’s work since the 1990s. “And they became more aligned with RFK.”

Kennedy, as secretary of the Department of Health and Human Services, cited one of Aaby’s papers to justify slashing $2.6 billion in US support for Gavi, a global alliance of vaccination initiatives. The cut could result in 1.2 million preventable deaths over five years in the world’s poorest countries, the nonprofit agency has estimated. Kennedy has frozen $600 million in current Gavi funding over largely debunked vaccine safety claims.

Kennedy described the 2017 paper as a “landmark study” by “five highly regarded mainstream vaccine experts” that found that girls who received a diphtheria-tetanus-pertussis, or DTP, shot were 10 times more likely to die from all causes than unvaccinated children.

In fact, the study was far too small to confidently make such assertions, as Benn acknowledged. In a study of historical data that included 535 girls, four of those vaccinated against DTP in a three-month period of infancy died of unrelated causes, while one unvaccinated girl died during that period. A follow-up published by the same group in 2022 found that the DTP shot by itself had no effect on mortality. Critics say the 2017 study, rather than being a landmark, exemplified the troubling shortfalls they perceive in the Danish team’s research.

As Aaby and Benn’s US profile has risen, scientists in Denmark have set upon the work of their compatriots. In news and journal articles published over the past 18 months, Danish statisticians and infectious disease experts have said the duo’s methods were unorthodox, even shoddy, and were structured to support preconceived views. A national scientific board is investigating their work.

Stensballe, who worked with Aaby and Benn for 20 years, has been among those voicing doubts.

“It took years to see what I see clearly today, that there is a strange concerning pattern in their work,” Stensballe said in a phone interview from Copenhagen, where she treats children at Rigshospitalet, the city’s largest teaching hospital. She said their work is full of confirmation bias—favoring interpretations that fit their hypotheses.



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