Articles tagged with Heat
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.
A team of Australian scientists has discovered that the cassowary's distinctive helmet-like structure acts as a thermal window to regulate body temperature. The research provides new insights into the bird's ability to cope with high temperatures, and may have implications for our understanding of dinosaur physiology.
Researchers develop new mathematical model to optimize geothermal heat exchanger design, ensuring energy efficiency and economic viability. The model avoids unrealistic assumptions, providing accurate predictions for long-term thermal response behavior.
Researchers developed an adaptive textile that self-regulates its thermal properties based on the wearer's body temperature and humidity. The textile, made from infrared-sensitive yarn, can passively cool the body through radiative cooling and alter heat radiation by up to 35%.
Researchers at UMass Amherst have developed a fabric that can harvest body heat to power small wearable microelectronics, such as activity trackers. The fabric uses thermoelectric properties of everyday materials like wool and cotton to generate electricity.
Researchers have discovered a new class of half-Heusler thermoelectric compounds with a record high figure of merit, converting heat to electricity efficiently. The compound composed of tantalum, iron, and antimony demonstrated promising thermoelectric performance without using expensive elements.
A new study reconstructs ocean heat storage since 1871, revealing key changes in temperature history and circulation patterns. The findings suggest that up to half of mid-latitude Atlantic Ocean warming can be attributed to changes in ocean circulation since the 1950s.
Researchers used computer simulations to test the hypothesis that ankylosaurs' nasal passages acted as heat exchangers, warming and cooling air to regulate body temperature. The study found that the nasal passages could have provided energy savings of up to 84% during exhalation simulations.
Researchers from Osaka University developed a large-scale flexible thermoelectric generator module with high mechanical reliability and efficient power generation. The module achieved improved efficiency in recovering waste heat from curved heat sources, enhancing its mechanical reliability.
Researchers at Rutgers University have developed flexible, durable heating patches that are nearly 70% more efficient than similar patches. These patches use intense pulses of light to fuse silver wires with polyester, reducing energy waste and carbon footprint by selectively heating the human body.
Researchers from the University of Konstanz have demonstrated that lossless electrical transfer of magnetically encoded information is possible, enabling enhanced storage density and reduced energy consumption in computing centres. This finding paves the way for novel functionalities in future energy-efficient information technologies.
Researchers create long-lasting rewritable paper by layering blue dye and black toner, which remain legible for more than six months. The material can be reset by cooling it down to 14 F, allowing for over 100 reuse cycles.
Researchers at Ohio University are exploring a protein that naturally occurs in the body to prevent obesity and type 2 diabetes. The protein, Apolipoprotein A-IV, is known to act as a satiation protein, telling the body to stop eating.
Researchers at MIT have developed a heat-rejecting film that can be applied to windows to reflect up to 70% of the sun's incoming heat. This innovative material could significantly reduce air conditioning costs and energy consumption, particularly in hot cities like Hong Kong.
Researchers have created a wearable heater by modifying woven fabric with DuPont Kevlar fiber and nanowires, providing uniform heat and thermal insulation. The material is strong, flexible, breathable, and washable, making it suitable for use in cold-weather clothing.
Researchers at the University of Nottingham have developed a thermally-functional material that can absorb high solar radiation to cool itself autonomously. This innovative material has potential applications in treating burn injuries and withstanding thermal stresses on spacecraft.
A Purdue University-led team developed a new material that enables more efficient solar-powered electricity generation by reducing the cost of converting sunlight into heat energy. The innovation could make solar power a direct competitor to fossil fuels in generating electricity.
A new compact fusion reactor design using high-temperature superconducting magnets can effectively shed excess heat, a longstanding challenge in fusion power plants. This approach makes it possible to open the device's internal chamber and replace critical components.
A study by Columbia University's Mailman School of Public Health found that nearly one-third of Washington Heights residents experienced energy insecurity, leading to breathing problems, mental health issues, and poor sleep. Energy-insecure households were more likely to have children under 18 years of age and lower household income.
Researchers from Tomsk Polytechnic University discovered that straw, chips, sawdust, and peat can generate more heat than they consume during pyrolysis, a process that can be optimized for efficient energy production. This technology has the potential to make energy generation from biofuel more resource-efficient and environmentally fr...
Researchers create high-performance exterior PDRC polymer coating with nano-to-microscale air voids, which reflects sunlight and radiates heat to the sky. The coating can be fabricated, dyed, and applied like paint on various surfaces, achieving cooling capabilities in both desert and tropical climates.
Michigan State University has been awarded a $2 million grant to develop new designs for long-duration storage on the US power grid. The project, called Scalable Thermochemical Option for Renewable Energy Storage (STORES), aims to create modular thermal storage systems that can store heat energy in the form of chemical energy.
Researchers have developed a solar steam generator that approaches 100% efficiency for producing clean water from seawater. Inspired by origami, the device uses a 3D photothermal material to capture sunlight and evaporate water more efficiently than traditional flat devices.
Researchers at the University of Edinburgh discovered that tiny vibrations can be used to heat small amounts of liquid, potentially improving systems that prevent ice build-up on aeroplanes and wind turbines. The findings could also lead to more efficient drying of clothes in appliances.
New results show up to 100 times more heat can flow between nanoscale objects than predicted, with implications for solar cells and materials. The discovery could enable new ways to control heat in devices, such as heat transistors and diodes.
MIT researchers have developed a passive, solar-powered system to prevent ice buildup on surfaces, using a three-layered material that absorbs sunlight and spreads heat to melt boundary layers of ice. The system has been tested extensively and shows great promise for commercial use in various applications.
Researchers at Carnegie Mellon University have developed a low-cost actuation technology that can bend, fold or flatten specially prepared paper on command. The technology uses a thin layer of conducting thermoplastic applied to common paper, which can be heated to expand and cause the paper to change shape.
Researchers at UVA have invented a material with the ability to switch between insulating and cooling, making it suitable for applications such as smart fabrics and active wear. This technology has potential game-changing applications in various fields, including athletics and energy production.
Scientists have found a way to control spin currents using magnetic fields and temperatures, significantly improving the efficiency of fundamental spintronic components. This breakthrough has the potential to revolutionize the design of storage devices like hard disks and create new technologies such as spin current switches.
Researchers investigated natural refrigerants as replacements for CFCs, HCFCs, and HFCs in geothermal heat pumps to reduce energy consumption and operating costs. They found that ammonia and n-butane are the most economical and environmentally friendly alternatives.
Researchers at ETH Zurich explore the coupling between heat and particle currents in a gas of strongly interacting fermionic atoms. They found an order of magnitude below predictions of the Wiedemann-Franz law, indicating separation of mechanisms responsible for particle and heat currents.
Researchers from EPFL and ENS Paris have discovered that highly pressurized water in the vicinity of an earthquake can reduce its intensity. This finding contradicts previous theories and highlights the importance of considering fluid pressure in geothermal models to accurately predict earthquake behavior.
A NASA scientist has mapped the heat escaping from beneath Greenland's ice sheet, revealing a thermal track that records the movement of a continent through Earth's history. This heat map exposes a diagonal scar of warm, dense rock below the surface, created by a mantle plume that has fueled volcanic eruptions.
Researchers found that urban areas stayed warmer than surrounding suburbs and country during a 2014 cold wave, with temperature differences greatest at night. The study suggests that heat released from buildings can help cities reduce heating demand and make being outdoors more tolerable during extreme cold.
The Parker Solar Probe will travel closer to the Sun than any mission before it, providing unprecedented observations of the corona. Despite temperatures exceeding a million degrees Fahrenheit, the spacecraft will withstand due to its custom heat shield and autonomous system.
Defect-free boron arsenide has a record-high thermal conductivity, drawing heat away from hotspots much faster than current materials. This breakthrough could improve performance and reduce energy demand in various electronic devices.
Researchers from Sandia National Laboratories have developed a tiny silicon-based device that can harness waste heat and turn it into DC power. The device, called an infrared rectenna, has the potential to power compact devices in space missions and hybrid cars.
A team from Aalto University creates a miniature 'heat valve' in a quantum system, enabling the controlled exchange of energy with external surroundings. This breakthrough aims to improve the efficiency of quantum heat engines and refrigerators.
A UH-led team has reported synthesizing a crystal grown from boron and arsenic elements with far higher thermal conductivity than any other semiconductors and metals. The discovery could address technological challenges in cooling electronic devices, which is crucial for high power density electronics.
Scientists have created high-thermal-conductivity crystals of boron arsenide that could help manage heat in computer chips. The new material's properties make it comparable to silicon, a key component of current chip technology.
Researchers at Georgia Institute of Technology have developed a new co-design technique that merges the design of antenna and electronics, resulting in improved modulation and reduced waste heat. The innovation enables longer talk time and higher data rates in millimeter wave wireless communication devices for future 5G applications.
The Spins and Heat in Nanoscale Electronic Systems (SHINES) center at UC Riverside has received an additional $1.9 million in funding from the Department of Energy to pursue fundamental advances in energy production, storage, and use. The new funding supports the completion of valuable research still in progress.
Researchers at Oak Ridge National Laboratory have discovered a new mechanism for heat transfer in solids, supported by Einstein's 1911 theory. This 'heat-hopping' process occurs in thermal insulators and may be present in other crystalline solids.
Researchers at Chalmers University of Technology have developed a graphene assembled film with over 60% higher thermal conductivity than graphite film. The graphene film's high thermal conductivity is attributed to its large grain size, high flatness, and weak interlayer binding energy.
The Sandia National Laboratories' solar tower facility is conducting a year-round test of the thermal response of various materials to intense heat and cooling. Researchers are using this setup to evaluate material durability for the Air Force, with the goal of establishing material response thresholds after exposure.
A new study published in Nature Communications has more than doubled the ability of a material to convert heat into electricity, a significant step towards reducing wasted fossil fuel. By significantly narrowing the space through which spread electrons move, researchers improved thermoelectric energy conversion rates.
Researchers found that golden snub-nosed monkeys increase their energy intake from fats and carbs in winter to counteract elevated thermoregulatory costs. This adjustment enables the monkeys to balance their macronutrient content and meet specific nutritional needs, suggesting a key adaptation for survival in cold environments.
Researchers used deuterium to estimate heat flow in Yellowstone hot springs, accounting for both visible and subsurface water flows. The new method provides an important step towards understanding the complex processes driving Yellowstone's volcano and geothermal features.
Atomically thin nanowires have been found to convert heat to electricity with unprecedented efficiency. This breakthrough could lead to the creation of new thermoelectric generators and exploration of alternative candidate materials for thermoelectrics.
Researchers at Sandia National Laboratories are working on a project to refine a specific type of utility-scale solar energy technology that can supply renewable energy without batteries for storage. The goal is to reach temperatures greater than 700 C, which would boost efficiency and lower electricity costs.
Scientists at Oak Ridge National Laboratory made the first observations of supersonically propagating phasons through a vibrating crystal lattice. This discovery may revolutionize heat management in future electronics devices by providing a shortcut to send energy through materials.
Researchers at Tokyo Institute of Technology have created a micrometer-wide thermometer that can measure small and rapid temperature changes in real time. The device is sensitive to heat generated by optical and electron beams, enabling its use in various fields such as photo-thermal cancer treatment and advanced research on crystals.
Researchers at Purdue University have demonstrated the theoretical existence of thermoacoustics in solids, which could lead to the development of solid-state engines and refrigerators. The technology harnesses temperature oscillations and sound waves to generate energy, making it suitable for harsh environments like outer space.
Researchers at the University of Illinois have developed a new polymer-curing process that uses minimal energy and cuts manufacturing time in half. The breakthrough could lead to cost-effective production of high-performance polymers for aerospace and automotive industries.
Scientists have discovered that sarcoptic mange causes significant loss of body heat and increased metabolic rate in Tasmanian wombats, leading to reduced foraging and increased mortality. The research suggests that dietary supplementation may help address these issues, offering new hope for the management of wombat mange.
Engineers at UC Berkeley developed a thin-film system that can convert low-quality waste heat into electricity, achieving unprecedented energy density and power density. The technology has potential applications in various industries, including electronics and manufacturing.