Articles tagged with Heat
A study found that white rooftops, like those being installed in New York City, can reduce peak temperatures by 43 degrees Fahrenheit compared to traditional black roofs. The low-cost, DIY-friendly option also improves urban albedo and reduces greenhouse gas emissions.
Researcher Xinwei Wang found that spider silk conducts heat better than most materials, including silicon and aluminum, with a rate of 416 watts per meter Kelvin. Spider silk also exhibits an abnormal increase in thermal conductivity when stretched.
A new model, published by Anne Hofmeister and Robert Criss, presents a three-dimensional gas cloud scenario for planetary accretion. The model explains planetary orbits and spins without relying on heat production, conserving angular momentum in a cold environment.
Researchers at Wake Forest University developed Power Felt, a thermoelectric device that converts body heat into an electrical current. The technology has potential uses in various applications, including powering mobile devices during emergencies or boosting battery power in vehicles.
Georgios Vatistas's Swirl Flow-Type Heat Exchanger reduces energy demands and environmental resource usage by 40 times, offering broad industrial applications.
Researchers have found that brown fat in healthy adult men burns energy to generate body heat during cold exposure, but not at warm temperatures. This discovery has significant implications for combating the human obesity epidemic and suggests that increasing brown fat may not lead to weight loss.
Researchers at the University of Texas at Dallas have discovered a new material called graphene that conducts heat 20 times faster than silicon, leading to more-efficient cooling of electronics and potentially longer-lasting computers and cellphones.
Researchers at UC Riverside have made a significant discovery in graphene's thermal conductivity, showing that isotopically engineered graphene can conduct heat more efficiently than natural graphene. This finding has the potential to impact various applications, including electronics, photovoltaic solar cells and radars.
Researchers have developed a technology that reduces air pollutant emissions from chicken and swine barns by up to 79% while recovering heat. The system uses biofiltration and heat exchangers to temper fresh air and generate heat, reducing energy consumption.
Researchers discovered that bundling boron nanoribbons can significantly increase their thermal conductivity. The flat surface structure of the nanoribbons allows for tighter contact between individual structures through van der Waals interactions, enabling efficient phonon transmission and enhanced heat transfer.
Duke University engineers developed a way to produce thermal diodes that can transfer heat in both directions, overcoming existing limitations. The method uses self-propelled water droplets to transport heat, enabling applications in energy-efficient solar panels and compact electronics.
Researchers develop tiny Stirling engine with a plastic bead that performs work and runs with the same efficiency as a macroscopic heat engine under full load. Microscopic processes cause the machine to run rough due to collisions with surrounding water molecules.
Research from Southern Methodist University's Geothermal Laboratory reveals vast geothermal resources across the US capable of producing over 3 million megawatts of green power, outpacing coal plants. The study refines locations for resource exploration using advanced mapping and geological analysis.
Scientists found Asian elephants store thermal reserve by lowering body temperature at night, allowing them to regulate body temperature in hot environments. This mechanism, known as heterothermy, may be more common in mammals than previously thought.
Researchers at Rensselaer Polytechnic Institute have developed a new way to decrease zinc oxide's thermal conductivity without reducing its electrical conductivity by adding aluminum. This innovation could lead to new technologies for harvesting waste heat and creating energy-efficient systems, such as cars, aircraft, and power plants.
Researchers studied individual phase slips in aluminum nanowires, observing the nature and temperature at which they occur. The findings provide information to build ultra-thin superconducting wires without phase slips, which could play a role in ultra-miniaturized electronics.
Researchers at Oregon State University have discovered a way to produce 'skutterudites' using microwave technology, cutting production time from days to minutes and opening doors to efficient thermoelectric energy generation. This breakthrough has huge potential for applications in industries and devices that waste heat.
The University of Cincinnati is testing lightweight, compact sleeping platforms and warm sleeping bags for its geology team working at high altitudes. The goal is to increase work efficiency and comfort while collecting rock and soil samples.
KamLAND collaboration measures radioactive decay of uranium, thorium, and potassium in Earth's crust and mantle to estimate heat energy. The new estimate is precise enough to aid in refining accepted geophysical models, suggesting that radioactive decay supplies only about half the Earth's heat.
A North Carolina State University researcher is working on a project to develop new testing technologies for evaluating gear worn by wildland firefighters. The goal is to create clothing that provides better balance between comfort and thermal protection. The team will use an instrumented manikin called RadMan to study radiant heat and...
MIT researchers have developed a novel method for storing solar energy by modifying carbon nanotubes with azobenzene, resulting in an efficient and cost-effective solution. The new material has a high volumetric energy density comparable to lithium-ion batteries, making it promising for applications such as heating and energy storage.
Researchers develop multiferroic alloy that converts heat into electricity with no carbon dioxide emissions. The material can capture waste heat from various sources, including cars and industrial plants, to produce electricity.
A team of students has developed a system that harnesses heat from the sun and attic to operate a clothes dryer, reducing electricity bills by up to 16 percent. The system is expected to save homeowners nearly $6,500 in 20 years, with additional energy savings through space heating applications.
Researchers at Oregon State University have successfully prototyped a new energy technology that captures and uses low-to-medium grade waste heat from various sources. The system achieved an impressive 80% conversion efficiency in turning wasted heat into cooling capability, outperforming current approaches.
Researchers discovered that light-capturing pigment molecules can be triggered by heat, producing false alarms. The study found that red-sensing pigment triggers false alarms most frequently.
Researchers have discovered that quantum entanglement can create a cooling effect when deleting data, which could be used to mitigate heat generation in supercomputers. By understanding the connection between information theory and thermodynamics, they found that entropy is a lack of knowledge that can be exploited for cooling purposes.
Researchers at NASA's Goddard Space Flight Center have developed an electrohydrodynamic (EHD)-based thermal control technology that promises to make it easier and more efficient to remove heat from small spaces. The technology, which uses electric fields to pump coolant through tiny ducts, could benefit a wide range of applications, in...
Researchers at MIT have found a way to manipulate the electrical and thermal properties of materials by changing external conditions such as temperature. The technique can change electrical conductivity by over 100 times and heat conductivity by threefold, making it suitable for various applications including electronic circuitry and t...
Researchers at MIT have developed a new system for harnessing the sun's heat to generate electricity, producing power with an efficiency roughly eight times higher than previous devices. The system uses flat, stationary panels and eliminates the need for tracking systems, making it potentially less expensive to produce.
Assistant Professor Tom Vandervelde of Tufts University has been awarded a $400,000 NSF Career Award to continue his research on thermophotovoltaics. His goal is to make these cells more efficient at lower temperatures, enabling applications in medical devices and sustainable energy solutions such as cooling data server farms.
A team of researchers from Denmark and Japan have developed a new technology to convert waste heat into electricity using oxide materials. The project aims to integrate the technology into existing systems and reduce CO2 emissions, potentially enabling the use of thermoelectric material in various applications such as cars and stoves.
Researchers at Northwestern University have developed a material that can harness electricity from heat-generating items with 14% efficiency, a scientific first. The material, composed of nanocrystals of rock salt in lead telluride, reduces electron scattering and increases energy conversion efficiency.
The measured magnetic field strength of 25 Gauss is significantly stronger than the 5-Gauss weak field or the 100-Gauss strong field that would imply large radioactive decay contributions. The result constrains heat sources in the core, with the outer core likely producing 60% of the planet's power.
Scientists have discovered a class of materials that can convert heat to electricity and vice versa exhibit an 'opposite-direction' phase transition at the nanoscale in response to temperature changes. This phenomenon is linked to the emergence of fluctuating dipoles, which impede the movement of heat through the material.
Researchers propose a new branch of aerothermodynamics to study attached boundary layer flows, focusing on unsteadiness in vehicular environments. They have explored principles using simple models and investigated interaction characteristics between temperature and velocity fields.
Scientists have demystified glasses by analyzing the behavior of a metallic alloy as it cools down. The findings suggest that glassy states can be unfrozen and refrozen by changing temperature, contradicting previous theories on strong and fragile liquids.
A system is being developed to capture heat from a car's exhaust, reducing fuel consumption by up to 10% through thermoelectric generators. The technology uses heat difference to generate electricity, promising improved fuel economy and reduced emissions.
Saturn's southern hemisphere emits more energy than its northern one, with variations seen in the planet's seasons and years. The Cassini CIRS instrument reveals Saturn is not losing power evenly, providing a new understanding of the planet's internal heat source.
Researchers at MIT have made a major step forward in fusion energy by studying the plasma edge. By reducing the steady-state power conducted to the wall, they have found that redistributing exhaust power through impurity radiation is a viable option for future fusion reactors.
Scientists at MIT find molecular mechanism for storing and releasing heat on demand, enabling potential for rechargeable batteries and fuel, and opening door to more abundant materials.
Virginia Tech engineers have received funding to investigate ways to reduce emissions from vehicles and improve fuel economy. They aim to develop thermoelectric materials that can convert waste heat into electricity, increasing gas mileage and reducing pollution.
Researchers detected a massive star's supernova in 2007, which appeared as a hot dust cloud instead of the typical explosion. The astronomers suspect this was more common early in the universe and may be related to the brightest star system in our galaxy.
Scientists have observed Alfvén waves in the solar wind that point perpendicular to the magnetic field, efficiently transferring energy to protons. These waves play a crucial role in heating protons and explaining the solar wind's temperature changes.
Physicists at the University of Arizona have developed a new way to convert waste heat into electrical power using quantum physics. The technology holds great promise for making various devices more efficient and reducing ozone-depleting chemicals.
Researchers have developed tiny devices that convert waste heat into electricity using pyroelectric nanowires. The devices can generate an electrical current in response to temperature changes, offering a potential solution for powering small devices and biological applications.
The new technology, thermo-spintronics, could enable integrated circuits that run on heat instead of electricity. Researchers discovered that two pieces of the material do not need to be physically connected for the effect to propagate from one to the other.
Researchers at NIST create a laser power detector coated with the world's darkest material, a forest of carbon nanotubes that reflects almost no light. The new detector will be used for precision measurements in advanced technologies like optical communications and solar energy conversion.
A new solar energy conversion process called photon enhanced thermionic emission (PETE) has the potential to surpass existing photovoltaic and thermal conversion technologies. The process excels at higher temperatures, making it ideal for use in solar concentrators.
Researchers have developed a new ultrathin cooling technology that can efficiently cool 'power electronics' in military and automotive systems. The miniature device uses copper spheres and carbon nanotubes to passively wick a coolant, handling up to 550 watts per square centimeter of heat.
A new study using a global model confirms that implementing cool roofs and pavements in cities can cancel the heating effect of up to two years of worldwide carbon dioxide emissions, equivalent to taking 300 million cars off the road. This can help delay warming and mitigate global climate change.
Researchers at Purdue University have developed a new type of heat pump that can maintain efficiency in extreme cold climates, cutting heating bills in half. The innovation uses a scroll compressor and precise refrigerant flow control to reduce energy losses.
A new high-temperature heat pump technology has been developed to tap into geothermal energy sources, providing a renewable and inexhaustible energy supply. The system uses waste water from geothermal wells, reducing dependence on fossil fuels and CO2 emissions in European towns.
Researchers are creating a Subsurface Thermal Energy Storage (STES) system to store waste energy underground, cutting heating and cooling costs and reducing carbon emissions. The system uses natural insulating properties of underground sediments and conventional heat pumps to achieve higher efficiency than traditional HVAC systems.
Researchers at NCAR suggest that half of the heat believed to have built up on Earth is unaccounted for due to inadequate measurement tools. The scientists call for additional ocean sensors and better data analysis to track the flow of energy through the climate system.
Researchers found that supported graphene retains exceptional thermal conductivity of up to 600 watts per meter per Kelvin near room temperature. This is significantly higher than copper and silicon thin films currently used in electronic devices.
Researchers at MIT have developed a method to transform polyethylene into a thermally conductive material, outperforming some metals in thermal conductivity. The new process involves aligning polymer molecules to enhance heat transfer efficiency.
Researchers at MIT have discovered a new phenomenon that causes powerful waves of energy to shoot through carbon nanotubes, enabling the production of electricity. The discovery has led to the creation of a system that produces energy about 100 times greater than an equivalent weight of lithium-ion battery.
The James Webb Space Telescope's five-layer sunshield was subjected to a series of tests using a 1/3-scale model to verify its ability to block and redirect solar heat. The experiments aimed to match computer models with test data, ensuring accurate thermal performance predictions for the full-size sunshield.
A city can mitigate urban heat island by employing shade, smart material choices, and digital simulations. Canopies, lighter colors, and thermal properties are key tools in alleviating the UHI.
Phononic Devices partners with OU for breakthrough thermoelectric technology, promising increased efficiency in power generation and waste heat removal. The $3M ARPA-E grant enables further development and commercialization of the tech.