Articles tagged with Heat Transport
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Researchers from Shanghai Polytechnic University developed new efficient phase change microcapsules for storing solar energy, demonstrating superior photothermal conversion and thermal conductivity. The study found that the novel PCM microcapsule shells showed a 54.9% photothermal conversion efficiency, significantly higher than non-do...
A new method to improve solid-state hydrogen fuel cell charging times has been developed by researchers from the University of Technology Sydney. The study used a semi-cylindrical coil heat exchanger, which significantly improved heat transfer performance and reduced charging time by 59%. This innovation has the potential to revolution...
University of Washington researchers have created a flexible, wearable thermoelectric device that converts body heat into electricity. The device's stretchable and efficient properties enable seamless integration into wearables and soft robotics.
Researchers at ORNL developed a theory that thylakoids help plants tolerate harsh conditions, while a digital platform informs on hydropower development. AI-powered neutron scattering can also accelerate experiments, and e-waste recycling is being explored.
A new AI system predicts heat transfer coefficients with higher accuracy than existing methods, providing reliable results and uncertainty analysis. The system combines deep learning and Gaussian process regression to tackle the challenges of mini-channel heat transfer.
By pairing two waveguides, one with an ill-defined topology and another with a well-defined one, researchers created a topological singularity that can halt waves in their tracks. This phenomenon has potential applications in energy harvesting and enhancing nonlinear effects.
New research reveals that low model horizontal resolution leads to discrepancies in simulated surface heat fluxes over the North Atlantic. Increasing resolution improves surface heat flux simulations and inferred heat transport, helping the research community better interpret historical simulations and projections.
Researchers found rocket exhaust gases can remain high in altitude, producing thermal nitrogen oxides and carbon dioxide that can affect the Earth's climate. The team modeled fluid dynamics of rocket exhaust gases to understand the impact on atmospheric pollution.
New research suggests that 62% of warming in the subtropical North Atlantic is stored in the deep ocean below 700m. The study estimates a further 0.2°C warming in the next 50 years due to climate change.
The study reveals significant information on the thermal properties of electric double-layer capacitors, which can help create safer and more reliable energy storage devices. The research team found that charging and discharging alter the heat capacity of EDLCs, leading to a decrease in capacitance.
The study reveals that superconductors can transmit spin currents between magnets, allowing for controlled magnetic interactions and modifying the magnetic response. This breakthrough enables new approaches to information processing using magnetic materials at low temperatures.
Scientists at Wuhan University developed a non-contact optical characterization method to detect negative water pressure in microfluidic systems. By analyzing the deformation of hydrogel surfaces, they derived the exact value of negative pressure. This innovation has potential applications in mapping dynamic flow and heat transfer.
Physicists have made a peculiar discovery in which energy moves from a colder to a hotter region, creating counterintuitive edge currents. The research, published in Physical Review Letters, shows that these currents are remarkably robust and can occur in topologically trivial systems.
Scientists at Osaka University developed a new numerical technique to visualize heat flux at the atomic scale for the first time. The team found that sub-atomic stresses in solid and liquid structures determine the direction of heat flux, enabling more efficient nanoscale manufacturing.
A new drag model for powder-particle spouted beds has been developed and tested, achieving higher accuracy in simulating the desulfurization process. The model's structure-activity relationship has been shown to improve predictions of particle velocity, water vaporization rates, and mass fractions.
Geoff Wehmeyer has been awarded a National Science Foundation CAREER Award to deepen understanding of nanoscale heat transfer and improve device performance. He will use scanning transmission electron microscopy nano-thermometry experiments to better understand interfacial heat transport.
Researchers have designed a novel thermal armour that successfully inhibits the Leidenfrost effect up to 1,150°C and achieves efficient liquid cooling across a wide temperature range. The breakthrough has significant implications for applications in aerospace, space engineering, and next-generation nuclear reactors.
Researchers found that levitating ice requires a significantly higher temperature threshold than liquid water, with the meltwater layer creating a temperature differential that consumes most of the surface's heat. This results in a larger temperature window for boiling, leading to better heat transfer compared to using a liquid alone.
Marine heat waves in the Chesapeake Bay are projected to increase by half a year by 2100, causing devastating impacts on marine life and coastal economies. The study found a significant upward trend in frequency and intensity of marine heat waves within the Bay.
Researchers at JAIST have demonstrated a high thermal rectification ratio on suspended asymmetric graphene nanomesh devices at low temperatures. The device shows promise for developing a high-efficiency thermal rectifier based on graphene nanomesh structure.
A study published by UC San Diego researchers found that heat waves significantly increase emergency room visits among people experiencing homelessness. The study highlights the need for heat action plans to protect vulnerable populations from extreme weather conditions.
Researchers at Georgia Tech and collaborators observed interfacial phonon modes, confirming their existence and contribution to heat transfer at interfaces. The discovery opens a new pathway for consideration in engineering thermal conductance for electronics cooling.
Researchers developed a material that automatically responds to changing temperatures, switching between heating and cooling. The glass can regulate both solar transmission and radiative cooling, reducing energy consumption up to 9.5% or ~330,000 kWh per year.
Researchers discover ways to generate clean energy from less-profitable farmland, restore habitat for grassland birds and create sustainable polymers. These breakthroughs could help achieve both renewable energy and conservation goals, as well as reduce future plastic waste.
Researchers develop a new method for characterizing thermal transport properties at the nanoscale, enabling visualization of temperature distribution and molecular interactions. This breakthrough paves the way for advanced nanodevices and deeper understanding of materials.
Scientists develop a new way to control heat flow through ultrathin layers, promising sensitive thermoelectric devices. Weaker coupling between layers reduces heat transport by up to ten times.
New research from the University of Arizona suggests that a slowdown in the Atlantic Meridional Overturning Circulation (AMOC) will intensify extreme cold weather in the US. The study found that without the AMOC, extremely cold winter weather would become more frequent and severe.
Researchers from The University of Electro-Communications and Tokyo University of Agriculture and Technology found that sintering porous media inside heat transfer tubes increases the area available for heat exchange, reducing thermal resistance and enhancing heat transfer performance. Heat transfer in these tubes is five times greater...
Developed a highly efficient boiling immersion cooler using lotus metals, increasing critical heat flux from 200 W/cm² to 530 W/cm² or more. The technology is expected to solve the heat concentration problem of in-vehicle power semiconductors and be applied to CPUs for workstations and large-scale servers.
Researchers from Tokyo University of Science developed a computationally quick approach to predict molten droplet solidification on a solid surface. The model simulates the solidification process by considering the droplet behavior and heat transfer between the hotter droplet and cooler surface, replicating experiments with high accuracy.
Researchers developed kirigami-processed cellulose nanofiber films that dramatically improve cooling functionality, reducing thermal resistance by about one-fifth. These films can be used to create new cooling devices for wearable electronics, addressing bulkiness and inflexibility issues.
Researchers have mapped significant geothermal heat beneath Thwaites Glacier in West Antarctica, revealing a new potential weak spot in the ice sheet's stability. This heat flow, estimated to be up to 150 milliwatts per square meter, could lead to easier sliding of the glacier and potentially accelerate its collapse.
Researchers at MIT have quantified the phenomenon for the first time, finding that boiling droplets on hot oily surfaces move rapidly due to a thin oil cloak coating the outside of each water droplet. This cloak acts as a kind of balloon skin, holding vapor bubbles in place and imparting momentum.
The Antarctic Circumpolar Current flowed more rapidly during the last interglacial period, with a flow speed 10-15% higher than today. This could lead to an increase in global temperatures and a decline in the ocean's capacity to absorb CO2.
A team of researchers has identified key characteristics related to popcorn expansion, enabling more efficient selection and breeding of high-quality popcorn. The study found that kernel outer layer thickness is a critical trait for increased popping expansion.
Researchers at the University of Utah have developed a theoretical method to thermally cloak objects, making them invisible to thermal cameras. Using heat pumps, they can fine-tune heat transfer and mimic heat signatures of different objects.
Researchers from CNRS and universities in France and Austria develop new imaging technique to visualize electromagnetic fields surrounding nanocrystals. This breakthrough enables precise targeting of heat transfers and better understanding of materials properties.
Researchers studying quantum materials aim to design new materials with novel thermal properties, potentially enhancing energy efficiency in devices. Sheila Edalatpour's work may lead to breakthroughs in thermophotovoltaic waste heat recovery, electronic devices, and thermal diodes.
Researchers at UVA School of Engineering have challenged the traditional heat transfer paradigm in semiconductor design. They discovered a new mechanism called ballistic thermal injection that allows for independent optimization of optical, electrical, and thermal behavior without impacting device performance.
Researchers from Oak Ridge National Laboratory have made groundbreaking discoveries in climate science, providing unprecedented data to improve global environmental models. Additionally, scientists have uncovered a mechanism that disease-causing bacteria use to anchor their protective outer membranes, which could inform strategies to c...
Swimming microparticles have the potential to improve coolant performance by accelerating heat transfer from hot surfaces. This innovative technology could lead to faster, smaller devices with reduced energy consumption, benefiting industries such as electronics, automotive, and renewable energy.
Researchers created a personal cooling fabric that efficiently transfers heat away from the body while allowing sweat to evaporate. The new material, made from nanofibrous membranes coated with boron nitride nanosheets, has high thermal conductivity and potential uses in solar energy collection and electronic device management.
Researchers developed a wood-based steam generator that harnesses solar energy to separate pure water from contaminants. The device uses light-absorbing, water-evaporating top layers and insulating glass bubbles for efficient purification.
Researchers studied ocean water properties beneath Ross Ice Shelf, revealing four distinct water column regions with varying temperature and salinity structures. The findings suggest the presence of enhanced diffusion, potentially modifying cavity circulation, which is tidally modulated.
Intensifying tropical cyclones strengthen ocean eddies feeding the Kuroshio Current, accelerating it and transferring more heat energy to mid- and high-latitude ocean waters. This phenomenon highlights a positive feedback loop between TCs and climate warming, potentially impacting future climate predictions.
Researchers found that fluid flow across flat surfaces has three distinct zones, including a lengthy transitional zone, which significantly affects heat transfer calculations. This discovery could improve the accuracy of heat exchanger designs and engineering practices in various industries.
Researchers found that atmospheric tidal waves formed from solar heating on the planet's dayside and cooling on its nightside maintain Venus' super-rotation. The study also reveals a dual circulation system that transports heat across the globe.
Researchers at University of Michigan developed nanoscale thermal switches that can control the flow of heat at the nanoscale. This discovery has the potential to revolutionize thermal management in devices such as transistors and diodes.
The system uses multiple layers of flat solar evaporators and condensers to harness sunlight and produce fresh potable water. It achieves an overall efficiency of 385 percent, surpassing previous records by two times.
Sangyeop Lee, a Pitt engineer, has received a $500K NSF CAREER Award to develop machine learning models that predict material conductive properties. The project aims to create more efficient heat management in electronic devices and energy storage systems.
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 found that different shapes of micropillars affect liquid retention, with triangular pillars showing reduced critical burst volume for high surface-tension liquids. The study aims to develop an evaporative heat exchange device.
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.
A West Virginia University chemical engineer is developing an online monitoring tool using AI to predict boiler behaviors and optimize power plant operations. The project aims to reduce forced outages, increase flexibility and profitability, and improve the nation's existing coal-fired power fleet.
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.
Researchers from SISSA and UC Davis develop a new methodology that bridges different approaches for crystals and glasses, enabling predictive modelling of heat transport in complex disordered materials. This breakthrough empowers scientists to understand and design heat transport for various applications.
Researchers discovered that adding an organic solvent to common water-based turbulent heat exchange systems can boost their capacity to move heat by 500%. This approach achieves 10 times more improvement than other methods, revolutionizing heat exchange in HVAC and large-scale applications. The additive is non-corrosive, non-flammable,...
Scientists have successfully measured thermal transport through single-molecule junctions for the first time, revealing that heat transfer is length-independent. The breakthrough uses custom-developed calorimetric-scanning-thermal-microscopy technique to determine thermal conductance, which originates from atomic vibrations or phonons.
A team of researchers has successfully measured the rate of heat transfer through a single molecule, a key step towards building molecular computers. The study found that the heat transfer rate was relatively constant across different chain lengths, with rates of up to 20 picowatts per degree Celsius.
A new method of condensation, using lubricant-infused surfaces (LIS), has been found to promote more efficient heat transfer and droplet movement. The erratic movement of water droplets is caused by unbalanced capillary forces acting on the droplets.