Articles tagged with Heat
Mice lacking the cold-sensing ion channel TRPM8 consumed more food during the day when they should be asleep, leading to obesity and high blood sugar in adulthood. This study reveals a previously unrecognized link between thermal sensing systems, thermoregulation and food intake.
Urban heat islands are caused by cities trapping more heat than surrounding areas due to their structure, affecting energy consumption and air quality. Researchers studied 50 cities and found that well-organized cities with straight streets retain more heat at night, leading to increased energy bills in hot climates.
Researchers detect heat produced by Alfvén waves in a sunspot, shedding light on the Sun's extremely high temperatures. The discovery opens up new understanding of this phenomenon and its potential applications in energy reactors and medical devices.
The Russian National Technological Initiative aims to intensify heat transfer using nanomodified composite materials and nanostructures, aiming to remove high-density heat fluxes at low temperature differences.
Scientists have developed CONTISOL, a solar reactor that can run day and night using concentrated solar power. The reactor uses air as the heat transfer medium and achieves stable temperatures round the clock.
The project aims to convert waste heat into cooled water, offering potential cost and energy savings to U.S. manufacturers. The innovative turbo-compression cooling system has numerous large-scale practical applications, including dairy producers transforming waste heat into chilled milk.
A recent study by the Joint Research Centre reveals that changes in global vegetation cover from 2000 to 2015 have made the planet warmer. The research found that the removal of tropical evergreen forests for agricultural expansion is the most significant factor contributing to local increases in surface temperature.
Scientists have discovered a simple method to harness the thermoelectric effect by combining a graphite pencil with a conductive coating on paper. The resulting voltage is comparable to expensive nanocomposites, offering potential applications in flexible electronics and wearable devices.
A novel system, called a thermal resonator, converts daily temperature swings into electrical power. The device takes advantage of the ambient temperature fluctuations that occur during the day-night cycle, making it suitable for remote sensing systems without requiring batteries or other power sources.
Researchers at the University of Tsukuba have developed a new kind of thermoelectric system that can harness small energy differences at low temperatures, producing an electrical energy of 2.3 meV per cycle. The device has shown promising prospects for large-scale heat energy recovery and could help industries become more efficient.
A study by University of Cambridge biological anthropologists reveals that muscle mass is key to regulating heat loss from the hands in cold conditions. Volunteers with higher muscle mass experienced faster rewarming of their hands after exposure to ice-cold water.
Researchers propose a novel method to cool quantum devices by leveraging quantum interference, effectively cancelling heat flow and mitigating thermal noise. This innovative approach has the potential to significantly enhance the performance and stability of quantum computers.
Researchers discovered that heat flow behaves like a viscous fluid when transitioning from metal to substrate, causing temperature spikes in electronic devices. This finding paves the way for better thermal management, improving processor performance and preventing 'hot spots',
Researchers found that changes in humidity determine how much snowpack contributes to streams, lakes, and groundwater as the climate warms. Cloudy, humid winter days cause snowpack to warm faster, increasing melt during winter months. In contrast, clear skies and low humidity preserve the snowpack until spring. The study highlights the...
Researchers at Friedrich Schiller University Jena developed smart windows that can change light permeability with a button press, while also harnessing solar heat. These 'large-area fluidic windows' offer a cost-effective alternative to traditional air conditioning systems and daylight regulation.
Researchers from Ural Federal University and Karaganda State Technical University developed a mathematical model to optimize the operation of an autonomous heat supply unit. The study found that adjusting parameters such as blade size in the Cavitator increased cavitation intensity and temperature, improving efficiency.
The University of Illinois Chicago has received a $4.2 million grant from the U.S. Department of Energy to evaluate and install highly efficient combined heat and power technologies. This technology produces both thermal energy and electricity, achieving typical efficiencies of 65-75% compared to conventional systems.
Chinese physicists manipulate heat transfer to reduce waste and create invisible thermal cloaks. Their experimental results confirm equations predicting thermal conductivity of periodic materials.
Researchers used video cameras to capture footage of cars accelerating through a traffic light, finding that packing tightly doesn't increase passing chances. Drivers should maintain a safe distance from the car in front when stopped at a light to reduce rear-end collision risks.
Physicists at Bielefeld University discovered a new material that can generate magnetic signals, known as 'spin currents', from heat, increasing efficiency. The researchers tested various combinations of thin films and found that materials with special electronic structures produced stronger spin currents.
Researchers at MIT have developed a new chemical composite that can store thermal energy during the day and release it when needed. The hybrid material uses molecular switches to change shape in response to light, allowing for controlled thermal energy storage.
Scientists have identified a novel biological pathway in beige fat cells that burns excess blood glucose to produce heat, suggesting a new strategy for treating metabolic disorders. This discovery could lead to the development of anti-obesity drugs.
Researchers have developed a new material for clothing that can cool people down without external energy needed, using a nanocomposite thread made from boron nitride and polyvinyl alcohol. The fabric is more efficient at moving heat away from the body than pure polyvinyl alcohol or cotton fabrics.
A new technology developed by UTSA professor Samer Dessouky converts heat from paved surfaces into electricity, generating power for rural areas and potential back-up lighting in airports. This innovation uses drones to map concentrated heat sources, enabling efficient energy harvesting from hot pavements.
The devices can be cut to the size needed for specific applications due to their symmetrical fractal wiring patterns. The modular generators could be inkjet printed on flexible substrates like fabric and manufactured using inexpensive roll-to-roll techniques.
Researchers at Ames Laboratory have successfully decomposed lignin into stable components using a phosphate-modified ceria catalyst, producing useful industrial precursors for nylon production. The process eliminates the need for hydrogen from natural gas and uses an energy-conserving alcohol-based hydrogenation process.
New simulations led by PPPL provide positive news for ITER. Researchers estimate a heat flux width of up to 6 millimeters within the divertor plates' capacity to tolerate, far greater than previous projections. This finding indicates ITER can produce 10 times more power than it consumes without damaging the divertor plates prematurely.
The device uses a temperature difference between the hot and cold sides to generate electricity, with a high temperature difference of 20.9 °C, much higher than conventional wearable thermoelectric generators driven by body heat.
Drexel University researchers develop a method to create roads that can deice themselves during winter storms by adding phase change materials like paraffin wax to the concrete mix. The technology has shown promise in melting snow and ice, reducing the need for chemicals and salt.
Researchers at MIT have found a new way to control the adhesion of freezing droplets on surfaces by manipulating their thermal properties. This discovery could lead to improved coatings in industries such as 3-D printing and turbine blade manufacturing.
A recent study published in Nature investigated the Alpine Fault of New Zealand, revealing unusual heat generation and fluid movement. The research team drilled to a depth of 893m into the active fault, discovering a pressure gradient almost 10% greater than expected, and temperature gradients typical of active volcanic regions.
Researchers develop 'dip-and-dry' approach for selective solar absorbers, exhibiting high performance and durability. The new method yields highly efficient SSAs with contrasting optical properties for solar and thermal radiation.
A new technique can change plastic's molecular structure to help it dissipate heat more efficiently, making it suitable for applications like vehicles, LEDs, and computers. The process is inexpensive and scalable, and preliminary tests show a polymer with thermally conductive properties similar to glass.
A new study by Florida State University researchers found that temperature-related tweets increase on Twitter when temperatures rise. Government officials use the platform to disseminate information about cooling centers and energy assistance, with agencies in several states actively using Twitter for this purpose.
Researchers at Aalto University found that solar energy can produce over 80% of domestic heating requirements in Finnish households. The study used various storage methods and found that prices need to be competitive for it to become a viable alternative. This could significantly reduce carbon dioxide emissions in Europe.
Researchers at Oak Ridge National Laboratory have developed a new approach to locate oil and gas in shale, reducing production time and cost. Additionally, the team has discovered a link between electrochemistry and ferroelectricity, enabling new materials for electronics and energy applications.
Thermal comfort has increased in China over the past few decades due to rising temperatures and declining wind speed. The study found an average of 255 very cold and cold days per year, but a decline in cold days, with only 11 hot and very hot days per year.
The new cogen facility will save BMC about $1.5 million in heat and energy costs annually by operating at 70 percent efficiency compared to traditional power plants. The cogeneration plant, located on the Yawkey roof, can heat and power hospital's inpatient units for months if the electric grid goes down.
Nebraska engineers have created a nano-thermal-mechanical device that allows computing at temperatures up to 630 degrees Fahrenheit. This technology has the potential to revolutionize industries such as space exploration, oil drilling, and geology by harnessing heat instead of combating it.
An international team of scientists found that strongly nonlinear systems can reach equilibrium, provided certain conditions are met. The breakthrough was made by examining the collisions between solitary waves in a chain of solid spheres and comparing the results with dynamical computer simulations.
Researchers have developed a new reconfigurable device that can emit thermal infrared light in a fully controlled manner, enabling efficient energy harvesting from waste heat. The technology has potential applications in thermophotovoltaics and could be used to convert heat into energy for various purposes.
Researchers at Duke University have developed a new 'jumping droplet' technique that effectively cools mobile hotspots by harnessing the power of surface energy. This breakthrough method, reported in Applied Physics Letters, enables efficient heat dissipation in all directions, outperforming existing methods.
Joe Feser's $500,000 NSF grant will focus on manipulating heat transfer by phonons using embedded nanoparticles. The research aims to engineer materials with improved thermal properties for applications such as nanostructured electronic and optical materials.
Researchers discovered a new, eco-friendly thermoelectric material made from calcium, cobalt, and terbium that can generate electricity through temperature differences. The material has the potential to power implantable medical devices, charge mobile devices, and even reuse waste heat in power plants.
The new study reconstructs historical ocean subsurface temperature change with improved accuracy, revealing larger ocean energy accumulation and increased confidence in climate change assessments. This advances our understanding of global warming driven by the Earth's energy imbalance.
Scientists have reinvented abandoned heat energy converter technology using graphene, making it seven times more efficient. The new prototype can convert heat into electricity with an electronic efficiency of 9.8%, a significant improvement over traditional methods.
Researchers at UC Davis have discovered new types of cage-like compounds called clathrates that can convert waste heat into electricity. The compounds, which trap an atom inside a larger cage, show promise for improving thermoelectric devices.
Researchers developed an experiment to detect quantum events in ultra-thin films, enhancing understanding of basic phenomena in nano-sized systems. The study uses a novel 'nano-trampoline' setup to measure specific heat and demonstrate the existence of quantum criticality.
A new film developed by Yao Zhai and colleagues can dissipate the sun's thermal energy, resulting in a cooling effect. The material is lightweight, easily conforms to curved surfaces, and relatively easy to mass produce, making it a promising solution for passive radiative cooling.
Scientists have found that electrons in vanadium dioxide move in unison, making it a poor conductor of heat. The material's unique properties make it suitable for applications like thermoelectric systems and window coatings.
A team of researchers at Ohio State University has developed a device that converts waste heat into electricity, producing a voltage output 10 times higher than previous results. The innovation uses a composite material of nickel and platinum to amplify the voltage output through magnetism.
Researchers at UNIST have created a new type of high-performance thermoelectric material that can be directly painted onto any surface. This innovation enables the efficient collection of heat energy from industrial waste, potentially powering vehicles and other applications.
New research investigates how native California wild mustard species respond to temperature stress, highlighting natural variation in thermotolerance. The study identifies the Boechera genus as a tractable system for studying thermotolerance and gaining insights into heat stress mechanisms.
Scientists have found that the UVR8 receptor in Chlamydomonas reinhardtii activates a safety valve to dissipate excess energy as heat. The study reveals a second protective role of these receptors, producing an anti-UV 'sunscreen'.
Researchers found that amphetamine slows down body temperature rise and masks fatigue in rats, allowing them to run longer. However, this mechanism can lead to dangerous overheating of muscles, posing a significant health risk.
Scientists have developed a new solar smart window that can turn opaque on demand for added privacy, while also powering other devices using excess energy. The innovative window uses liquid crystals and an amorphous silicon layer to achieve this functionality.
Scientists have created a new thermoelectric material that can convert waste heat into electricity at an unusually high rate, producing 22 watts per square centimeter. This breakthrough could lead to more efficient energy conservation and reduced CO2 emissions by harnessing abundant and free fuel sources.
Researchers from the University of Extremadura and Sapienza University of Rome have discovered a new type of convection in granular fluids. This lateral-wall thermal convection is produced by inert walls and exhibits distinct properties compared to traditional fluid dynamics.
Researchers at UCR have discovered a way to control the flow of heat in electronic devices using semiconductor nanowires. By confining acoustic phonons to these nanostructures, they can alter their energy spectrum and improve thermal management.
A team of scientists has determined a more precise version of the second law of thermodynamics and applied it to small quantum systems. The study found that violations of the law are rare, but can occur with significant probability in small quantum objects.