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Tag: less power

  • This L.A. startup uses SpaceX tech to cool data centers with less power and no water

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    As the artificial intelligence industry heats up, Karman Industries is trying to cool it down.

    The Signal Hill startup says it has developed a cooling system that uses SpaceX rocket engine technology to rein in the environmental impact of data centers, chilling them with less space, less power and no water.

    It recently raised $20 million and expects to start building its first compressors in Long Beach later this year.

    “Our high-level thesis is we could build the best compressor out there using the latest and greatest technology,” said David Tearse, chief executive of Karman. “We want to reduce that electrical consumption of cooling so that you have the most efficient way to cool these chips.”

    The high-end, expensive chips that power AI can slow down or shut off when they overheat. They can reach more than 200 degrees, but need to be below 150 degrees to work best.

    Cooling warehouses packed with tens of thousands of them can require fields full of equipment and huge quantities of water.

    Karman has developed a cooling system similar to the heat pumps in the average home, except its pumps use liquid carbon dioxide as refrigerant, which is circulated using rocket engine technology rather than fans. The company’s efficient pumps can reduce the space required for data center cooling equipment by 80%.

    Over the years, data centers have used fans and air conditioning to blow cold air on the chips. Bigger facilities pass cold liquid through tubes near the chips to absorb the heat. This hot liquid is sent outside to a cooling yard, where sprawling networks of pipes use as much water as a city of 50,000 people to remove the heat.

    A 50 megawatt data center also uses enough electricity to power a mid-sized city.

    As AI has super-sized data centers, adding more and more chips, they have needed increasing amounts of space and power for cooling.

    “It’s kind of a losing battle, especially when you keep densifying your chips,” said Tearse.

    Cooling systems account for up to 40% of a data center’s power consumption and an average midsized data center consumes more than 35,000 gallons of water per day.

    Nearly 100 gigawatts of new data center capacity will be added by 2030 and energy constraints have become the biggest barrier for expansion. U.S. data centers will consume about 8% of all electricity in the country by 2030, according to the International Energy Agency.

    Communities across the U.S. have begun protesting data center construction, fearing that the power and water needs could strain infrastructure and boost costs to consumers. The cooling systems are projected to use up to 33 billion gallons of water by 2028 per year.

    Big tech companies and venture capital investors are spending billions of dollars to replace old-school technologies with energy-efficient solutions. Microsoft announced a new data center design that uses zero water for cooling. It recently vowed to ensure its data centers don’t increase the electricity costs or deny water to nearby communities.

    The data center-cooling market is projected to grow from about $11 billion in 2025 to nearly $25 billion by 2032.

    To serve this seemingly insatiable market, Karman has developed a rotating compressor that spins at 30,000 revolutions per minute — nearly 10 times faster than traditional compressors — to move heat.

    “Three or four years ago, it was very challenging to do just because the motors didn’t exist. Automotive components are getting up to those speeds,” said Chiranjeev Kalra, co-founder and chief technology officer of Karman.

    About a third of Karman’s 23-person team came from SpaceX or Rocket Lab, and they co-opted technologies from aerospace engineering and electric vehicles to design the mechanics for the high-speed motors.

    The system uses a special type of carbon dioxide under high pressure to transfer heat from the data center to the outside air. Depending on the conditions, it can do the same amount of cooling using less than half the energy.

    Karman’s heat pump can either reject heat to air, or route it into extra cooling, or even power generation.

    One of the potentially biggest selling points for the systems is that they don’t require water, which will enable data centers in spots where water is scarce.

    In really hot places such as Texas and Arizona, cooling systems struggle, either using excessive water to cool or having to throttle the chips to stop them from overheating.

    Karman’s latest funding round brings the total money raised to more than $30 million. Major participants included Riot Venture, Sunflower Capital, Space VC, Wonder Ventures, and former Intel and VMware CEO Pat Gelsinger.

    Karman said it will begin customer deliveries in the summer of 2026 from its Los Angeles manufacturing facility that is designed to make 100 units per year. The plan is to eventually quadruple capacity.

    If successful, Karman could dent the market share of Trane Technologies and Schneider Electric, the leaders in heat rejection systems.

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    Nilesh Christopher

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  • America’s Teeth Grinders Are Turning to Botox

    America’s Teeth Grinders Are Turning to Botox

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    With the pinch of a needle, cosmetic dermatologists such as Michele Green can make forehead wrinkles disappear and deep-furrowed crow’s-feet puff back out like yeasted dough. Botox is totally magic, a little unsettling, and very in demand: Green’s New York City practice has been swamped as Americans seek to give themselves a “post-pandemic” glow-up. But these days, many of her patients aren’t after eternal youth and sex appeal. When Green reviews her schedule for the week each Monday morning, she told me, “I’m just like, Oh my god.” At least a quarter of her Botox appointments are for people with a different motive entirely: They can’t stop clenching their jaw and grinding their teeth.

    Across the country, patients dealing with the meddlesome condition are now turning to Botox—yes, Botox.  “It’s a very popular treatment” for people who grind and clench their teeth, Lauren Goodman, a L.A.-based cosmetic nurse, told me. Bruxism, the official term encompassing both behaviors, is an involuntary action that tends to happen when people are sleeping at night, for reasons including alcohol and tobacco use, sleep apnea, and stress—perhaps why the condition has soared in the United States during the pandemic. The condition is a tolerable nuisance for many people, but the symptoms can get very real: With bruxism on the rise, dentists are reporting more chipped and cracked teeth in patients, along with jaw pain and facial soreness. In the most severe cases, patients can suffer debilitating headaches and jaw dislocation. The most common treatments, such as mouth guards and lifestyle changes, only sometimes help get rid of symptoms.

    That’s what makes Botox so appealing for the recent flood of teeth grinders. Jaw injections relax the chewing muscles that clench and grind with up to 250 pounds of force—potentially relieving pain and preventing dental issues in the process. It’s not as though every teeth grinder in America is hotfooting it to their nearest Botox clinic, but the procedure seems to have blown up since the start of the pandemic. Five dentists and cosmetic experts told me they’d noticed an increase in teeth grinders and clenchers getting Botox. People who have exhausted more traditional routes are “really just committed to alleviating their pain,” said Samantha Rawdin, a prosthodontist in New York City. “If that means getting a needle to the face, so be it.”

    But even if Botox has some upsides, it’s hardly the permanent, sure-thing solution that dentists and patients have long searched for. That’s been the narrative all along with bruxism: Because there are so many possible causes, treatments are an educated dice roll—and none of them is universally effective. “I don’t tell my patients I can treat them,” Gilles Lavigne, a dentistry professor at the University of Montreal, told me. “I tell them I can help them manage their condition.” So, how do we still not always know how to handle this incredibly common ailment?


    Botox has been creeping onto the teeth-grinding stage since long before the pandemic. Although it has gained noticeable traction over the past few years, research on the efficacy of Botox stretches back to the late 1990s. In the years since, researchers have also discovered that the injections, which temporarily paralyze the masseter muscles responsible for grinding and clenching, can reduce the frequency and intensity of bruxism. It’s one of a slew of non-cosmetic Botox uses that have been identified since the drug hit the market in 1989: Injections also treat issues such as excessive underarm sweating, acne, and migraines.

    Botox for bruxism hasn’t been FDA approved, so it’s still considered off-label—but anyone with a Botox license can legally inject a willing teeth grinder. And at least in theory, Botox has some advantages over other bruxism treatments. Night guards might prevent you from gnashing your teeth into smithereens while you sleep, but they can be ineffective at stopping the behavior and can even make it worse—especially if you have sleep apnea, Jamison Spencer, a dentist and sleep-apnea expert based in Boise, Idaho, told me. Minimally invasive regimes such as yoga, meditation, cognitive behavioral therapy, and physical therapy are hit or miss. Muscle relaxers can be helpful for some patients, but those aren’t universally popular among the dentists I spoke with, some of whom cited America’s opioid crisis as a concern.

    When less invasive treatments don’t work, Botox might be “the next frontier,” Leena Palomo, a professor at New York University’s College of Dentistry, told me. Grinders and clenchers seem to be learning about the injections from a variety of sources. Rita Mizrahi, an oral surgeon in New York who offers Botox for bruxism, told me that her patients are typically referred by their regular dentists. Others discover jaw Botox in online forums such as Reddit and the beauty network RealSelf, where often anonymous discussions of the procedure abound. And some are reading mainstream-media testimonials or hearing about it from friends or family—particularly as more and more Americans embrace Botox for cosmetic purposes.

    At its best, the procedure can really help certain teeth grinders: Studies have indicated that Botox can decrease pain levels. One RealSelf reviewer described trying night guards, stress relief, and cutting out caffeine before getting jaw injections. “Thank goodness for something like Botox to come along in this day and age,” they wrote four months after getting the procedure. The procedure comes with some cosmetic changes too: Grinding and clenching all night can be a workout, which might lead to enlarged chewing muscles and a square, boxy face. The injections slim the jawline for many patients, giving it “more of a V-shape,” Green said.

    But Botox has some real downsides—and plenty of dentists are still hesitant to recommend it. For starters, it’s expensive and impermanent. The procedure typically costs at least $1,000; is not covered by medical or dental insurance; and usually won’t last for more than four months. “This isn’t a onetime thing and you’re good,” Mizrahi said. And like most of the other treatments available, jaw Botox attacks teeth-grinding and clenching symptoms, but not the cause. Because people still need to chew, the masseter muscle isn’t totally immobilized—meaning that patients “will just grind with less power,” Lavigne said.

    And all of the risks associated with the cosmetic use of Botox apply here too, such as bruising at the injection site, headaches, allergic reactions, and less desirable changes in facial expressions due to misplaced Botox. One RealSelf reviewer experienced no improvement in jaw pain but the unfortunate onset of a creepy grin that resembled a “chucky doll smile.” Another said that their headaches disappeared after the procedure, but so did their cheeks: “I couldn’t recognize myself in the mirror and looked like I had aged 10 years within a couple of months.”

    That grinders and clenchers are more frequently turning to Botox is hardly a pure success story. Early mentions of teeth gnashing exist in the Bible, yet we still don’t really understand how to make it stop. I know firsthand how frustrating that feels. In January, after trying (and failing) to open wide enough for a crispy chicken tender, I was finally motivated to see a dentist—who gave me a night guard so I’d quit slamming my teeth together. I meditate like it’s my job, I don’t have sleep apnea or take medications of any sort, and yet I still gnaw on that hunk of plastic like it’s gristle. My jaw doesn’t lock anymore but it’s still tense most mornings. I’m priced out of getting Botox—so, like many teeth grinders, I’m stuck in medical purgatory.

    Teeth grinding isn’t like a broken arm, where cause and effect are obvious and fixable. “Because the origin of [jaw] pain is not singular, you have to attack it from various modalities,” Mizrahi told me: “All the things that potentially contribute to the pain have to be addressed,” and that can involve fields far outside dentistry. Even dentists themselves aren’t always equipped with all the information: “We get virtually no bruxism education” in dental school, Spencer, the sleep-apnea researcher from Idaho, said.

    With all these roadblocks, many patients never find out why they’re clenching or grinding, says Alan Glaros, an emeritus professor of dentistry at the University of Missouri at Kansas City, who’s been researching the issue for more than 40 years. That’s partially because it’s a difficult problem to not only treat, but also study. Bruxism’s many causes intersect “a lot of disciplines,” such as dentistry, sleep health, and psychology, which muddies the research process. Each field is studying the behavior, but the results will only ever tell part of the story. “People act as if this is all solved, but it’s not,” Glaros told me.

    So for now, mouth guards, meditation, and Botox are what we have. The treatment, in all likelihood, isn’t going anywhere. “As people get to know others who have responded well, I predict that we’re going to see an uptick,” Palomo said. Grinders and clenchers will keep chomping on their plastic night guards or forking up thousands of dollars a year for temporary injections, all in a maybe-successful attempt to quell their pain. If only Botox could banish bruxism like it does stubborn wrinkles.

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    Ali Francis

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