Articles tagged with Heat
Scientists have found a way to harness excess energy from photons that are too energetic for materials to absorb, potentially increasing the efficiency of solar panels. By combining a perovskite with an acceptor material, hot electrons can be readily absorbed, even without slowing down their loss of energy.
Scientists at Vienna University of Technology have developed a new thermoelectric material with a ZT value of 5 to 6, generating electrical current very efficiently from temperature differences. This enables sensors and small processors to supply themselves with energy wirelessly.
Using waste heat helps reduce the cost of producing hydrogen, a key step towards cleaner energy. Researchers developed an approach that uses low-grade waste heat to produce hydrogen, with potential for lower production costs and increased efficiency.
Visualizing heat flow in bamboo reveals its natural structure and thermal properties, enabling the development of sustainable and energy-efficient buildings. The study aims to reduce carbon emissions by using renewable materials like bamboo, which can help mitigate climate change.
Researchers developed new techniques to measure heat tolerance in quinoa, a health food rich in essential amino acids. The method uses spectral reflectance indices to assess plant growth under high temperatures, providing insights into grain production and paving the way for breeding more resilient varieties.
Drexel researchers developed a computational platform that can quickly produce designs for 3D printing carbon-fiber composite materials with an internal vasculature optimized for active-cooling. Microvascular composites offer many advantages over existing liquid and air-cooling systems, including being much lighter and durable.
Researchers have developed porous polymer coatings that can reversibly switch their optical transmittance in solar and thermal wavelengths, enabling dynamic control of light and heat in buildings. The coatings can regulate indoor temperatures and light levels, making them suitable for heating, cooling, and lighting applications.
Researchers analyzed data from Galileo's 1995 fireball and found the recession rate exceeded predictions, highlighting issues with current heat shield models. New fluid dynamics models using faster computers and data from the probe have led to a better understanding of atmospheric entry vehicles.
Physicists at the University of Basel have experimentally verified that the heat generated through friction in topological insulators can be significantly reduced. By regulating voltage, they observed a novel quantum-mechanical dissipation mechanism, enabling targeted control over electronic friction.
A new study finds that heat wave sizes could increase substantially by mid-century, with potential impacts on public health and energy demand. The research suggests that considering the spatial size of heat waves is crucial for informing management decisions and planning for the future.
A new thermoelectric material has been developed using strontium titanate and titanium oxide, allowing for the transformation of exhaust heat into electrical energy. The material's biphase structure and nanosized grains increase its thermoelectric efficacy, enabling devices to operate at high temperatures without overheating.
A team of scientists found that heat energy can transfer from a node with lower temperature to another node with higher temperature in certain complex network structures. This phenomenon becomes more evident when the network assortativity decreases. The study may shed new light on the search for good thermoelectric materials.
Researchers at Ohio State University have found a new method for harnessing thermal energy by exploiting paramagnetic particles, which can produce spin and generate electricity. This breakthrough could lead to the development of more efficient thermoelectric materials and energy harvesting technologies.
Researchers observe that local thermal perturbations of spins in solids can convert heat to energy, even in paramagnetic materials. This effect, known as paramagnon drag thermopower, has the potential to enhance fuel efficiency and power smart clothing by harnessing body heat.
Researchers develop a low-cost thermoelectric generator that harnesses temperature differences to produce renewable electricity at night, when solar power is not available. The device can generate up to 25 milliwatts of energy per square meter and has the potential to be scaled for practical use.
Researchers at Brigham Young University developed a new wildfire model that uses plant chemistry to predict how quickly wildfires will burn. The study found that the type of shrub species affects the speed of combustion and chemical production, enabling more efficient fire management.
A new model suggests that planting more vegetation may be more effective in drier regions to cool cities, while wetter cities require alternative approaches such as shading or ventilation. The study's findings can provide guidance for climate-sensitive city design and planning heat mitigation efforts.
The study found that TRPV1 heat responses shifted from cool- to warm-adapted species, while TRPA1 activity increased in cool-adapted species, suggesting adaptations for thermal sensing
Researchers developed a tiny thermometer probe to measure temperature inside living cells, revealing quick bursts of heat from mitochondria releasing proton energy. This discovery could lead to new therapeutic targets for obesity and cancer.
A new model of heat transfer in crystals has been developed by a team of Russian scientists from Peter the Great St. Petersburg Polytechnic University. The model describes the distribution of heat in ultrapure crystals at the atomic level, revealing certain directions along which heat rays distribute major energy.
A University of Texas at Dallas physicist has teamed with Texas Instruments Inc. to design a better way for electronics to convert waste heat into reusable energy. Thermoelectric nanoblades have been shown to greatly increase silicon's ability to harvest energy from heat, making it mass-producible.
Scientists at Stanford University have developed an atomically thin heat shield that is effective in preventing overheating in electronic devices. The new material, which consists of four layers just 10 atoms deep, can provide insulation comparable to a sheet of glass 100 times thicker.
A new study by Berkeley Lab researchers found that cool roofs could protect urbanites from heat waves, reducing air temperatures and bringing down heat wave exposures by 35 million each year. The study predicts that heat waves will become two to 10 times more frequent across California's cities by mid-century.
Researchers designed and tested an experimental system that uses a near-infrared laser to actively heat two gold nanorod antennae to different temperatures, defying thermal diffusion. The team measured temperature differences as high as 20 degrees Celsius by analyzing scattered photons from green light.
New research from the University of Sydney suggests that electric fans can be beneficial in hot, humid conditions but detrimental in dry conditions. The study calls into question current guidelines recommending fan use only when temperature rises above 35 degrees Celsius.
Researchers have designed an innovative radiative cooling system that can help cool buildings in crowded metropolitan areas without electricity. The system uses a special material to absorb heat from the air and transmit it into outer space, resulting in temperature reductions of up to 11 degrees Celsius at night.
A Rutgers-led study shows that permeable concrete pavement can reduce pavement temperature by up to 30% and reflect more heat than asphalt pavement. The design improves with high thermal conductivity, further reducing heat output.
The research team derived precise values of enthalpy and entropy of numerous silver compounds, enabling predictions of chemical processes in the gas phase. The findings will help manage thin film and pure sample deposition from the gas phase.
An international team of researchers has successfully measured how heat passes between two gold electrodes through a single molecule. The study employed a scanning thermal microscope to detect the vibrations of atoms in an alkane molecule carrying the heat, providing valuable insights into thermal conduction at the molecular scale.
Numerical simulations reveal that thin films with negative thermodiffusion coefficients increase the absorption of vapour, improving heat recycling. The study offers valuable new insights into enhancing the performance of falling film absorbers.
Researchers at Rice University have created a device that channels waste heat into light, enabling more efficient solar energy systems. The technology, which utilizes carbon nanotube films, aims to simplify the process of turning heat into electricity with high efficiency.
A team of researchers has identified a critical variable that improves the efficiency of polymer-based heat energy harvesting. By exploring this new factor, they hope to design more efficient polymers for thermo-electric devices.
Researchers have discovered a way to produce more electricity from heat than thought possible by creating a silicon chip that converts thermal radiation into electricity. The chip can generate electricity even closer two silicon surfaces are together, potentially increasing battery life by up to 50%.
Researchers from NUS have developed a novel approach to confine heat within a small region of a metal ring, demonstrating the application of anti-parity-time symmetry to thermal diffusion. This breakthrough has significant implications for optimizing cooling systems and efficient heat removal in modern technologies.
A study by Swiss Federal Laboratories for Materials Science and Technology (EMPA) suggests that Switzerland can transition to a low-CO2 energy system by reducing building heating requirements by 42%, electrifying 3/4 of remaining heating needs, and increasing electrification of private car journeys to 20%.
Researchers at Chalmers University of Technology have developed a window film that captures solar energy during the day and releases it as heat at night, helping to regulate indoor temperatures. The film uses a specially designed molecule that changes color when it absorbs sunlight, allowing it to capture energy.
Researchers at CBPF and UFABC used quantum correlations to reverse thermodynamic arrow of time, allowing heat to flow from cold to hot without external energy. The experiment demonstrates a generalized form of the second law of thermodynamics, highlighting the role of quantum correlations in thermal transfer.
Researchers at WMG found that inductive charging can increase temperature in mobile phones, potentially shortening battery lifespan. The study compared normal wire charging with aligned and misaligned inductive charging, finding that misalignment led to higher temperatures and reduced charging efficiency.
A new cooling vest has been developed to help athletes cope with sweltering summer conditions, such as the 2020 Summer Olympics. The vest, designed by Hiroshima University and a Japanese sportswear company, features ice packs and a cooling collar that can reduce heart rate and body temperature.
Researchers at Swansea University have developed a 3D printed thermoelectric device that converts heat into electric power with an efficiency factor of up to 1.7, significantly higher than the previous best for printed materials. The breakthrough could boost energy efficiency in industries with high temperatures, such as steelmaking.
A new study by University of Exeter expert Richard Lowes found that lobbyists and campaigners were the most influential group in shaping UK Renewable Heat Incentive policy. Strengthening lobbying regulations could provide more visibility and control over their influence.
Researchers use graphene to improve loop heat pipes, essential for satellites and equipment in space. The Graphene Flagship project aims to integrate these devices into satellites and the international space station in the next few years.
A Stanford geophysicist discusses how a geothermal energy project in Pohang, South Korea, caused a magnitude 5.5 earthquake that injured dozens and forced residents into emergency housing. The study highlights flaws in common methods for minimizing earthquake risk when harnessing Earth's heat for energy.
A new microscopic theory describes heat transport in general ways, applying to ordered or disordered materials like crystals or glasses. The equation allows accurate prediction of thermoelectric material performance, which is crucial for efficient energy conversion and cooling.
Researchers developed a wearable patch that cools or warms a user's skin to a comfortable temperature, reducing the need for heating and cooling systems. The patch is powered by a flexible battery pack and can be integrated into clothing, promising to save energy on personal thermal comfort.
Researchers at Linköping University developed a sensor that combines pyroelectric and thermoelectric effects with nano-optical phenomena, enabling rapid and stable detection of temperature variations from warm objects or sunlight. The sensor is also pressure-sensitive and can distinguish between different materials.
Researchers at KAUST found that eddy-induced transport is more active in the central and northern Red Sea, influencing surface heat flux and salt dispersion. This mechanism balances fluctuations in both heat and salt, highlighting its role in the Red Sea's circulation.
A team of scientists successfully controlled induced seismicity during a deep geothermal stimulation in Finland using near-real-time monitoring. The approach allowed for prompt adjustment of pumping rates and pressure, ensuring the successful completion of the project.
The Arctic Ocean's seasonal memory mechanism explains how atmospheric circulation causes the Eurasian Arctic to melt faster than the American Arctic. The researchers found that different seasonal patterns are at play depending on region, with the Eurasian Arctic losing ice in winter and the American Arctic only losing ice in summer.
MIT engineers have developed thin polymer films that conduct heat better than many metals, including steel and ceramic. The films, which are thinner than plastic wrap, exhibit high thermal conductivity due to the untangled molecular structure of polyethylene.
Physicists at the University of Zurich have created a device that can cool objects to below room temperature without external power supply. The process involves oscillating heat currents and temporarily flows from cold to warm objects, increasing entropy over time.
Researchers studied L-carnitine's thermodynamic properties to optimize its transformation into a pharmaceutical agent. The study aimed to improve the production methods and dosage forms of this substance, which is popular among athletes due to its energy metabolism correcting effects.
A Pittsburgh research team has been awarded $500,000 by the NSF to develop a thermoelectric semiconductor using tungsten disulfide. The goal is to improve thermoelectric efficiency and pave the way for widespread use of these devices in various applications.
Researchers developed a new type of transparent wood that absorbs, stores and releases heat, potentially saving energy costs in eco-friendly homes. The material is biodegradable, strong and can bear heavy loads, opening the door for its eventual use in modern architecture.
Researchers at MIT have developed a material that can be tailored to reflect or absorb infrared radiation independently of its visible light properties. The new polymer material can be designed for various applications, including colorful, heat-reflecting building facades and light-absorbing covers for solar panels.
Scientists have observed a new mode of heat transport in graphite, known as second sound, which behaves like sound when moving through the material. At temperatures above 80K, heat travels through graphite as a wave, cooling points instantly and carrying heat away at close to the speed of sound.
Research reveals that sea ice loss in the Arctic causes rapid warming, which will persist even after melting is complete. The study suggests that this phenomenon is more pronounced during certain periods, particularly during cloud season, due to seasonal sea-ice melting and its impact on atmospheric heat transfer.
Researchers at NYU Abu Dhabi have successfully achieved solid-state thermochemiluminescence with crystals, a process that generates light through heat application. This fundamental discovery opens up unexplored directions in chemiluminescence research and has potential applications in solar energy harvesting technologies and sensing.
Researchers have fabricated a film using DuPont Kevlar fibers and polyethylene glycol that absorbs heat and releases it slowly, making objects invisible to thermal cameras. The composite film performs comparably to other stealth films but is simpler and cheaper to make.
Researchers found that when compressed, cubic boron arsenide's heat conductivity improves initially but then deteriorates due to competition between different processes. This behavior has never been predicted or observed before and challenges conventional understanding of heat conduction.