Articles tagged with Heat
Researchers studied vibrational energy flow through a water-surfactant-organic solvent system, finding that the shape of molecules plays a crucial role in heat transfer. The study reveals that different excitations travel along different paths and rates, leading to significantly longer energy transfer times.
Researchers have designed a traveling-wave engine that converts 18% of heat source energy into electricity, outperforming current thermoelectric devices. The device's high reliability and efficient energy conversion make it suitable for deep space probes.
Scientists have created a better thermal insulator by introducing structure on the nanometer length scale in materials. The new nanolaminates exhibit a three times lower thermal conductivity than conventional insulators, due to the strong impediment of heat transfer at the interfaces.
Researchers developed synthetic jets that produce two to three times as much cooling with two-thirds less energy input, overcoming fan limitations. Vibration-induced droplet atomization technology also uses tiny cooling liquid droplets to carry heat away from components.
Researchers have developed a novel method to measure the energies involved in DNA synthesis, providing insights into DNA damage and its repair mechanisms. The study's findings can inform the development of targeted external agents to halt incorrect DNA synthesis.
Researchers found that carbon nanotubes exhibit lower thermal conductivity when integrated into other materials due to interfacial resistance. Despite this, they remain optimistic about using nanotubes to improve insulating materials.
The new material has up to five times the fracture toughness of conventional alumina, making it more forgiving under dynamic loads. It also exhibits high electrical conductivity ten trillion times greater than pure alumina, with interesting thermal properties that make it suitable for thermal barrier coatings.
Scientists using NASA's Global Climate Model found that oceans are storing more heat due to rising atmospheric temperatures. The study predicts significant ocean warming in the Eastern Pacific Ocean and increased precipitation over the North Atlantic, with potential biological consequences for ocean life.
The EVAP-COND software simulates the performance of evaporators and condensers with various cooling agents, enabling engineers to optimize designs. This tool helps conserve energy while reducing laboratory testing and design-to-production time.
Researchers found that radioactive elements like potassium could supply enough heat to maintain the magnetic field, contradicting previous studies. The discovery helps explain Earth's long-lasting magnetic field and may shed light on the planet's core composition.
Researchers have developed a prototype device that can cool solid steel in just two minutes, outperforming conventional refrigerators. The innovative technology uses superlattices to achieve unprecedented cooling efficiency, paving the way for CFC-free and reliable electronic heat pump systems.
Researchers have developed thin layer silicon with improved lattice vibrational frequency, leading to a 30% increase in thermal conductivity. This breakthrough enables faster charging and more efficient heat conduction in digital semiconductor devices.
A new NASA-funded study reveals that human-caused land-use changes significantly contribute to climate change, potentially more so than greenhouse gas emissions. The research proposes a method for comparing different climate change factors, highlighting the importance of land surface changes in redistributing heat and affecting regiona...
Recent research suggests that West Antarctic ice streams are experiencing normal variability, contrary to predictions of imminent shutdown and sea-level rise. The study found that local conditions, such as geothermal heat and frictional forces, drive the slowdown or speeding up of ice streams.
Researchers have developed a semiconductor technology that converts waste heat into electricity with unprecedented efficiency. The new device, called 'thermal diodes,' operates at high temperatures and has the potential to revolutionize power generation and recovery of waste heat from power plants and automobiles.
Researchers found a significant difference in movement on each side of the Eastern California Shear Zone, with one side moving more than the other due to varying heat flow properties. This discovery provides a more accurate method for modeling earthquake data and could be applicable in many places.
Researchers from the University of Pennsylvania discovered that carbon nanotubes can conduct heat exceptionally well, potentially addressing overheating issues in microchips. The discovery could lead to applications in various fields, including electric motors and aircraft components.
University of Illinois researchers have developed a theory that explains how glassy materials behave and predict the speed of molecular motion changes with temperature. The theory, based on thermodynamic measurements of heat capacity, provides a universal form for expressing glass transition phenomena.
Scientists at PPPL have achieved a significant breakthrough in fusion research, producing the highest plasma current ever recorded in a spherical torus device - 1 million amperes. This milestone is crucial for understanding the physics of fusion and potentially leading to more efficient development paths for fusion energy.
Two scientists suggest that satellites' waste heat could be causing distant spacecraft to slow down faster than expected. The heat is emitted in a direction opposite to the Sun, giving the spacecraft a small push towards the Sun and slowing them down.
Urban Heat Island Pilot Project measures city cooling with urban forests. Cities like Sacramento & Salt Lake City use trees to reduce surface heating, improving air quality & mitigating heat stress. The study helps develop planning strategies for cities worldwide.
Researchers are studying the impact of Atlanta's growth on its air quality and temperatures over two decades. Trees have been found to reduce temperatures, with a difference of up to 31 degrees between paved areas and tree-lined spaces. The study aims to provide insights for cities reshaping themselves for comfort and lower heating bills.
The Oak Ridge National Laboratory has developed a new wall testing and rating procedure to determine the thermal performance of entire walls, rather than just insulation. This approach accounts for increased heat leakages in corners, doors, windows, and studs, providing more accurate measurements of building energy performance.