Corning's Gorilla Glass, known for its durability in smartphones, is making inroads into the architectural and home building industries. While more expensive than traditional glass, its strength, scratch resistance, and potential for slimmer, lighter designs are attractive features. Uses include windows, doors, facades, railings, and interior partitions, offering benefits like increased natural light, improved energy efficiency, and enhanced security. Though adoption is currently limited by cost, Corning is betting on growing demand for premium, high-performance building materials to drive wider acceptance of Gorilla Glass in residential and commercial construction.
Solar energy harnesses sunlight using photovoltaic (PV) panels or concentrated solar power (CSP) systems. PV panels directly convert sunlight into electricity via the photovoltaic effect, while CSP uses mirrors to focus sunlight, heating a fluid to generate electricity through conventional turbines. Factors influencing solar energy production include solar irradiance, panel efficiency, temperature, shading, and the system's angle and orientation relative to the sun. While solar offers numerous benefits like reduced reliance on fossil fuels and decreased greenhouse gas emissions, challenges remain, such as intermittency, storage limitations, and the environmental impact of manufacturing and disposal.
Hacker News users generally praised the clarity and comprehensiveness of the linked article on solar energy. Several commenters highlighted the helpful explanations of concepts like energy payback time (EPT) and the levelized cost of energy (LCOE). Some discussed the declining costs of solar and its increasing competitiveness with other energy sources. A few users pointed out the article's focus on crystalline silicon panels while briefly mentioning other technologies like thin-film. There was also discussion around the importance of considering the full lifecycle impacts of solar, including manufacturing and disposal. One compelling comment thread debated the realistic lifespan of solar panels and the factors that might influence their degradation over time. Another interesting exchange focused on the potential for integrating solar into existing infrastructure and the challenges related to energy storage.
Researchers at Linköping University, Sweden, have developed a new method for producing perovskite LEDs that are significantly cheaper and more environmentally friendly than current alternatives. By replacing expensive and toxic elements like lead and gold with more abundant and benign materials like copper and silver, and by utilizing a simpler solution-based fabrication process at room temperature, they've dramatically lowered the cost and environmental impact of production. This breakthrough paves the way for wider adoption of perovskite LEDs in various applications, offering a sustainable and affordable lighting solution for the future.
HN commenters discuss the potential of perovskite LEDs, acknowledging their promise while remaining cautious about real-world applications. Several express skepticism about the claimed "cheapness" and "sustainability," pointing out the current limitations of perovskite stability and lifespan, particularly in comparison to established LED technologies. The lack of detailed information about production costs and environmental impact in the linked article fuels this skepticism. Some raise concerns about the toxicity of lead used in perovskites, questioning the "environmentally friendly" label. Others highlight the need for further research and development before perovskite LEDs can become a viable alternative, while also acknowledging the exciting possibilities if these challenges can be overcome. A few commenters offer additional resources and insights into the current state of perovskite research.
Transit agencies are repeatedly lured by hydrogen buses despite their significant drawbacks compared to battery-electric buses. Hydrogen buses are far more expensive to operate, requiring costly hydrogen production and fueling infrastructure, while battery-electric buses leverage existing electrical grids. Hydrogen technology also suffers from lower efficiency, meaning more energy is wasted in producing and delivering hydrogen compared to simply charging batteries. While proponents tout hydrogen's faster refueling time, battery technology advancements are closing that gap, and improved route planning can minimize the impact of charging times. Ultimately, the article argues that the continued investment in hydrogen buses is driven by lobbying and a misguided belief in hydrogen's potential, rather than a sound economic or environmental assessment.
Hacker News commenters largely agree with the article's premise that hydrogen buses are an inefficient and costly alternative to battery-electric buses. Several commenters point out the significantly lower lifecycle costs and superior efficiency of battery-electric technology, citing real-world examples and studies. Some discuss the lobbying power of the fossil fuel industry as a driving force behind hydrogen adoption, framing it as a way to preserve existing gas infrastructure. A few offer counterpoints, suggesting niche applications where hydrogen might be viable, like very long routes or extreme climates, but these are generally met with skepticism, with other users arguing that even in these scenarios, battery-electric solutions are superior. The overall sentiment leans heavily towards battery-electric as the more practical and environmentally sound option for public transit.
Terence Tao's blog post explores how "landscape functions," a mathematical tool from optimization and computer science, could improve energy efficiency in buildings. He explains how these functions can model the complex interplay of factors affecting energy consumption, such as appliance usage, weather conditions, and occupancy patterns. By finding the "minimum" of the landscape function, one can identify the most energy-efficient operating strategy for a given building. Tao suggests that while practical implementation presents challenges like data acquisition and model complexity, landscape functions offer a promising theoretical framework for bridging the "green gap" – the disparity between predicted and actual energy savings in buildings – and ultimately reducing electricity costs for consumers.
HN commenters are skeptical of the practicality of applying the landscape function to energy optimization. Several doubt the computational feasibility, pointing out the complexity and scale of the power grid. Others question the focus on mathematical optimization, suggesting that more fundamental issues like transmission capacity and storage are the real bottlenecks. Some express concerns about the idealized assumptions in the model, and the lack of consideration for real-world constraints. One commenter notes the difficulty of applying abstract mathematical tools to complex real-world systems, and another suggests exploring simpler, more robust approaches. There's a general sentiment that while the math is interesting, its impact on lowering electricity costs is likely minimal.
A Penn State student has refined a century-old math theorem known as the Kutta-Joukowski theorem, which calculates the lift generated by an airfoil. This refined theorem now accounts for rotational and unsteady forces acting on airfoils in turbulent conditions, something the original theorem didn't address. This advancement is significant for the wind energy industry, as it allows for more accurate predictions of wind turbine blade performance in real-world, turbulent wind conditions, potentially leading to improved efficiency and design of future turbines.
HN commenters express skepticism about the impact of this research. Several doubt the practicality, pointing to existing simulations and the complex, chaotic nature of wind making precise calculations less relevant. Others question the "100-year-old math problem" framing, suggesting the Betz limit is well-understood and the research likely focuses on a specific optimization problem within that context. Some find the article's language too sensationalized, while others are simply curious about the specific mathematical advancements made and how they're applied. A few commenters provide additional context on the challenges of wind farm optimization and the trade-offs involved.
Researchers at the University of Stuttgart have developed a bioinspired adaptive shading system that responds to changing weather conditions without electricity. Mimicking the pine cone's humidity-driven scale movement, the system uses a bilayer material composed of wood veneer and a bacterial cellulose layer. When humidity increases, such as during rain, the cellulose swells, causing the shading elements to close. Conversely, in dry conditions, the cellulose shrinks, opening the elements and allowing light to pass through. This passive system offers a sustainable and energy-free solution for climate control in buildings, reducing the need for energy-intensive air conditioning and heating.
Hacker News users discussed the practicality and scalability of the bioinspired shading system. Several commenters questioned the cost-effectiveness compared to existing solutions like motorized shades or electrochromic glass, expressing skepticism about its real-world application. Others pointed out potential maintenance issues with the delicate pine cone-inspired design, especially concerning dust accumulation and insect infestations. The longevity and durability in various weather conditions were also questioned. Some appreciated the elegance of the biomimicry, but the overall sentiment leaned towards cautious interest with significant concerns about practical implementation. A few suggested exploring alternative materials beyond wood for improved durability and scalability.
Enterprises adopting AI face significant, often underestimated, power and cooling challenges. Training and running large language models (LLMs) requires substantial energy consumption, impacting data center infrastructure. This surge in demand necessitates upgrades to power distribution, cooling systems, and even physical space, potentially catching unprepared organizations off guard and leading to costly retrofits or performance limitations. The article highlights the increasing power density of AI hardware and the strain it puts on existing facilities, emphasizing the need for careful planning and investment in infrastructure to support AI initiatives effectively.
HN commenters generally agree that the article's power consumption estimates for AI are realistic, and many express concern about the increasing energy demands of large language models (LLMs). Some point out the hidden costs of cooling, which often surpasses the power draw of the hardware itself. Several discuss the potential for optimization, including more efficient hardware and algorithms, as well as right-sizing models to specific tasks. Others note the irony of AI being used for energy efficiency while simultaneously driving up consumption, and some speculate about the long-term implications for sustainability and the electrical grid. A few commenters are skeptical, suggesting the article overstates the problem or that the market will adapt.
Lightcell has developed a novel thermophotovoltaic (TPV) generator that uses concentrated sunlight to heat a specialized material to high temperatures. This material then emits specific wavelengths of light efficiently absorbed by photovoltaic cells, generating electricity. The system aims to offer higher solar-to-electricity conversion efficiency than traditional photovoltaics and to provide energy storage capabilities by utilizing the heat generated within the system. This technology is geared towards providing reliable, clean energy, particularly for grid-scale power generation.
Hacker News users express significant skepticism regarding Lightcell's claims of a revolutionary light-based engine. Several commenters point to the lack of verifiable data and independent testing, highlighting the absence of peer-reviewed publications and the reliance on marketing materials. The seemingly outlandish efficiency claims and vague explanations of the underlying physics fuel suspicion, with comparisons drawn to past "too-good-to-be-true" energy technologies. Some users call for more transparency and rigorous scientific scrutiny before accepting the company's assertions. The overall sentiment leans heavily towards disbelief, pending further evidence.
UK electricity bills are high due to a confluence of factors. Wholesale gas prices, heavily influencing electricity generation costs, have surged globally. The UK's reliance on gas-fired power plants exacerbates this impact. Government policies, including carbon taxes and renewable energy subsidies, add further costs, although their contribution is often overstated. Network costs, covering infrastructure maintenance and upgrades, also play a significant role. While renewable energy sources like wind and solar have lower operating costs, the upfront investment and intermittency require system balancing with gas, limiting their immediate impact on overall prices.
HN commenters generally agree that UK electricity bills are high due to a confluence of factors. Several point to the increased reliance on natural gas, exacerbated by the war in Ukraine, as a primary driver. Others highlight the UK's "green levies" adding to the cost, though there's debate about their overall impact. Some argue that the privatization of the energy market has led to inefficiency and profiteering, while others criticize the government's handling of the energy crisis. The lack of sufficient investment in nuclear energy and other alternatives is also mentioned as a contributing factor to the high prices. A few commenters offer comparisons to other European countries, noting that while prices are high across Europe, the UK seems particularly affected. Finally, the inherent inefficiencies of relying on intermittent renewable energy sources are also brought up.
Summary of Comments ( 69 )
https://news.ycombinator.com/item?id=43456936
HN commenters are skeptical of Gorilla Glass's viability in home construction, citing cost as the primary barrier. They argue that while technically feasible, it's significantly more expensive than traditional materials like double-pane windows and offers little practical advantage for the average homeowner. Some suggest niche applications like skylights or balconies where the added strength is beneficial, but overall the consensus is that widespread adoption in residential buildings is unlikely due to the price difference. A few comments also point out the potential issues with replacing broken panes, which would be considerably more costly and time-consuming than with standard glass.
The Hacker News post "Using Gorilla glass for home building" (linking to a WSJ article about Corning's Gorilla Glass) has several comments discussing the potential applications and challenges of using such glass in construction.
Several commenters express skepticism about the cost-effectiveness of Gorilla Glass for large-scale applications like home building. They point out that while Gorilla Glass excels in impact resistance for small devices, its cost would be prohibitive for larger surfaces like windows and walls. One commenter highlights the existing availability of tempered and laminated glass options that already provide adequate strength and safety at a lower price point. Another user mentions the potential difficulties and costs associated with replacing large panes of Gorilla Glass in case of damage.
Durability and practicality are also questioned. One commenter raises concerns about the long-term durability of Gorilla Glass against environmental factors like wind, debris, and temperature fluctuations, wondering if it would be more susceptible to scratches and haze over time compared to traditional glass. Another user points out the issue of cleaning large Gorilla Glass surfaces, particularly in high-rise buildings.
Some commenters discuss alternative applications where Gorilla Glass might be more suitable. Suggestions include interior partitions, skylights, railings, and other smaller architectural features where the enhanced strength and unique properties of Gorilla Glass could justify the higher cost. One comment specifically suggests using Gorilla Glass for balconies in high-rise buildings, arguing that the added strength and safety would be worth the investment in such a scenario.
A few commenters express interest in the potential aesthetic benefits of using Gorilla Glass in architecture, imagining sleek and modern designs. However, others counter this by highlighting the potential for glare and reflections, which could be problematic in certain settings.
One user brings up the manufacturing and logistical challenges associated with producing and transporting large sheets of Gorilla Glass. Another questions the feasibility of cutting and shaping such large panes to fit specific architectural needs.
Overall, the comments on Hacker News reflect a generally cautious and pragmatic view of the prospects of using Gorilla Glass in home building. While acknowledging the material's impressive strength and potential aesthetic appeal, many commenters express concerns about cost, practicality, and long-term durability. They suggest that niche applications and further development might be more realistic pathways for Gorilla Glass in the construction industry.