Articles tagged with Heat
Researchers found that roofs with shorter peak heights (less than three feet) should be wider to minimize heat loss, while taller peaks require equilateral triangles with a specific height-to-width ratio. These findings are similar to those seen in ancient architecture across the world.
KTU researchers have discovered an innovative solution to store excess heat underground, reducing heat loss and increasing energy efficiency. The ground-based heat accumulator stores heat in the soil, making it available when demand peaks, and can even reduce carbon dioxide emissions.
A new study reveals that many residents in Miami-Dade County face dual challenges of dangerously hot homes and unaffordable cooling costs, driving health and well-being risks. The research identifies four pathways explaining which households are burdened by poor building or air conditioner quality, low income, or household factors.
Researchers at Kyoto University develop thermomajorization theory to unify different distance measures, eliminating ambiguities in previous studies. The approach reveals the Mpemba effect is not restricted to specific temperature ranges, but can emerge across a wide spectrum of thermal conditions.
A new study from the University of Illinois explores how heat stress affects US dairy production, finding a 1% decline in annual milk yield due to high heat and humidity. Small farms are hit harder than large farms, with yields declining by 1.6% annually.
Researchers from Shinshu University investigated erythritol slurry as a promising heat transfer medium for thermal storage and transport. Their findings could help guide the design of industrial waste heat recovery systems, advancing energy efficiency and carbon neutrality.
Researchers discovered that hot and burning droplets can bounce off cool surfaces due to the formation of an invisible air cushion. This phenomenon has potential applications in slowing fire spread and improving engine efficiency.
Researchers have developed a new technology that can turn thermal radiation into electricity in a way that exceeds the physical limit of Planck's law. The breakthrough could revolutionize manufacturing industries by increasing power generation without high temperature heat sources or expensive materials.
Researchers have developed a compact thermoelectric generator system that efficiently converts exhaust waste heat from high-speed vehicles into electricity. The prototype achieved an output power of 40 Watts, with enhanced efficiency under high airflow conditions.
A recent study by Ritsumeikan University researchers analyzed the durability of flexible perovskite solar cells under damp heat conditions. The findings revealed that high humidity leads to degradation, while a high-quality barrier film retained most power conversion efficiency, making it crucial for long-term stability.
A cohort study from JAMA Network Open reveals an association between temperature exposure and increased psychiatric symptoms among adolescents in the Netherlands and Spain. The findings suggest a possible link between climate change and mental health, warranting further research across diverse climates.
Researchers at Osaka Metropolitan University have found key indicators for assessing chemical activity and temperature of active bubbles generated by ultrasonic waves. The study provides new insights into the relationship between bubble temperature and chemical activity, enabling more precise control of chemical reactions.
A new smart window technology combines liquid crystals with nanoporous microparticles and a patterned vanadium dioxide layer to simultaneously control visible light and infrared radiation. The device offers fast, efficient heat and visibility management, marking a significant step forward in energy-efficient building design.
A research team at Hokkaido University developed novel cerium oxide-based thermal switches, surpassing prior benchmarks with high efficiency and sustainability. The switches feature a new benchmark for electrochemical thermal switches, offering broad applications in industries such as electronics cooling and renewable energy systems.
Researchers at Osaka Metropolitan University identified clogging in a geothermal well due to accidental venting, highlighting the need for regular inspection and monitoring of water quality. The study emphasizes the importance of geochemical analysis of groundwater for stable and widespread use of aquifer thermal energy storage systems.
Researchers at Princeton Plasma Physics Laboratory have developed a technique to prevent unwanted waves that siphon off needed energy, increasing the efficiency of fusion reactions. Positioning a metal grate at a slight angle enhances heat put into the plasma and reduces slow modes, leading to more powerful and efficient fusion heating.
Researchers developed a novel 3D-printed hierarchical micro/nano-structured surface to improve spray cooling's high heat transfer coefficient and critical heat flux. The new surface coordinates liquid film boiling and capillary evaporation, resulting in record-breaking heat transfer performance.
The integration of ground source heat pump (GSHP) systems with energy piles offers a promising solution to address the growing urban heat island effect and reduce electricity consumption in smart cities. This technology provides efficient heating and cooling, reduces carbon emissions, and promotes sustainable urban development.
A QUT-led research team developed an ultra-thin, flexible film that converts body heat into power, enabling sustainable energy for wearable electronics. The technology also offers efficient cooling methods for chips, potentially improving smartphone and computer performance.
Researchers at UVA confirmed a key principle governing heat flow in thin metal films, providing a breakthrough in understanding thermal conductivity. The validation of Matthiessen's rule paves the way for refining materials that interconnect circuits in advanced computer chips.
A UCF researcher is developing a thermochemical energy storage system to reserve solar energy for future use and contribute to the global transition to clean energy. The system uses chemical reactions to absorb or release heat, making it an advantageous way to store energy at high temperatures.
A University of Cambridge-led study found that urban trees can lower pedestrian-level air temperature by up to 12°C. However, the study also revealed that the introduction of trees can have varying cooling effects in different climates and tree species traits.
The university's refurbishment project uses waste heat to provide heating to the Joseph Priestly Building and district heating system, reducing fossil fuel consumption and carbon emissions. The initiative is expected to yield substantial energy cost savings and enhance the data center's capacity for high-performance computing.
Researchers at CiQUS developed a new technique to create thermal circuits in certain oxides, enabling localized control of heat flow. By applying electric fields, they reduced thermal conductivity by up to 50% in micrometric regions, paving the way for efficient heat management in microelectronics.
Researchers demonstrate transverse thermoelectric conversion in WSi2 for the first time, using mixed-dimensional Fermi surfaces to enable TTE effect. The study paves the way for developing new sensors and efficient thermoelectric materials.
Researchers on the ISS National Lab have leveraged microgravity to study fundamental physical phenomena, such as heat transfer, combustion, and fluid dynamics. These discoveries hold potential for advances in pharmaceuticals, energy production, materials manufacturing, and more.
Researchers identify a quantum mechanism as key to accelerating ocean temperatures, which current climate models fail to predict. The study proposes a new paradigm that factors in non-thermal energy, suggesting a revised approach to understanding ocean thermal stability and climate change.
Rice engineers create a new thermal emitter that achieves efficiencies of over 60% despite practical design constraints, opening possibilities for more sustainable industrial processes and renewable energy growth. The technology could inform the development of grid-scale alternative storage solutions and power space applications.
Scientists have created a thermoacoustic engine that converts thermal energy into acoustic energy, which can be transformed into mechanical or electrical energy. The device has the potential to generate power ranging from tens to thousands of watts and could be used for camping, backpacking, and emergency situations.
Thermochemical materials show potential for load flexibility in building heating systems, enabling reduced electrical requirements and load shifting. The technology's performance is significantly impacted by humidity levels, making indoor air a key factor in its integration.
A new Harvard study finds humans possess higher metabolic rates than primates and apes, allowing for bigger brains, longer lifespan, and increased reproduction. Humans have 'escaped a tradeoff' between resting and active metabolism due to unique sweating ability.
A time-series study found heat waves associated with increased adverse health events among 65-year-olds, highlighting the need for heat adaptation strategies. Dually eligible individuals face vulnerable outcomes without such measures.
The paper reviews thermal design of SiC power modules for motor drives in electric vehicles, focusing on optimizing irregular Pinfin structures and collaborative design with DC bus capacitors and motors. Irregular Pinfin arrangements can enhance heat transfer efficiency and reduce pressure drops compared to regular layouts.
Researchers at the University of Virginia have confirmed a key principle governing heat flow in thin metal films, paving the way for advancements in technology and more efficient devices. The study validated Matthiessen's rule in ultra-thin copper films, providing a blueprint to mitigate thermal bottlenecks.
Researchers developed a new index combining human comfort and social vulnerability with heat island mitigation strategies. Trees were found to provide the best relief from heat in vulnerable areas, while cool roofs and green roofs were preferred in less vulnerable neighborhoods.
A new study from Chalmers University of Technology presents a technology that can destroy bacteria on implants using gold nanorods and near-infrared light. The method heats up the gold rods, killing bacteria without damaging surrounding tissue.
Professor Patrick E. Hopkins of UVA School of Engineering and Applied Science has secured a $289,830 Small Business Innovation Research grant to develop a precise tool for measuring heat movement in microchips. The technology will enhance cooling and prevent overheating in next-generation devices.
Researchers analyzed a thermophotovoltaic system paired with phase-change materials for energy storage and found slight reductions in costs. The study identified key factors affecting TPV system costs, highlighting the need for future research to improve adoption and efficiency.
Researchers developed a novel approach to regulate temperature based on gold structure concentration, improving spin wave transfer efficiency. This innovation has promising potential for future applications using spin waves and addresses the persistent issue of heat generation in electronic devices.
Older adults exposed to extreme indoor heat showed small reductions in end-exposure core temperature and heart rate when using electric fans. However, these changes were of questionable clinical importance and did not exceed previous suggestions for significance.
Scientists at Osaka Metropolitan University have synthesized aza-diarylethenes that exhibit both photoswitching and thermal switching properties. These new molecules can be used as rewritable recording mediums, written with light or heat, and erased with visible light.
A WSU-led study found that older adults tend to experience more discomfort in high heat, but it doesn't affect their mood as much as younger adults. Emotional responses to heat are highly individualized and moderated by age.
Next-generation passive radiative cooling technology offers an electricity- and refrigerant-free cooling solution, potentially reducing surface temperature by at least 2°C. The innovation has promising application potential in buildings, roads, and clothing, addressing issues such as urban heat islands and greenhouse gas emissions.
Dragonfly species with darker wing coloration have evolved to tolerate higher temperatures, possibly a decisive advantage in a warming world. This finding could help predict which species are vulnerable to extinction and preserve biodiversity.
Researchers developed a heat-adjusting material inspired by squid skin, allowing for user-adjusted warmth and breathability. The fabric is breathable, washable, and can be integrated into flexible clothing, making it suitable for cold weather applications.
A new study estimates that cool roofs could have saved up to 249 lives in London during the 2018 record-setting hot summer. If widely adopted, cool roofs would reduce the city's ambient temperature by about 0.8 degrees C on average.
Researchers at UCF are developing materials that allow electricity to move through devices without creating heat, potentially transforming how technology is built and powered. If successful, this could lead to a long-term solution for humankind and the way we consume our natural resources.
A new study suggests that using state-of-the-art energy efficiency technologies can enable Europe's construction sector to almost eliminate its carbon emissions by 2060. Employing technologies like solar energy and heat pumps can reduce total energy used for heating and cooling buildings by up to 97%.
Researchers at Kyushu University developed a new organic thermoelectric device that can generate power from ambient temperature. The device, composed of copper phthalocyanine and fullerenes, achieved an open-circuit voltage of 384 mV and a short-circuit current density of 1.1 μA/cm².
Researchers at UW have created a flexible, durable electronic prototype that converts body heat into electricity, powering small electronics like batteries or sensors. The device is also resilient and can be used in various applications, including wearables and data centers.
Researchers developed a new type of temperature-adaptive radiative cooling device with improved performance, reducing solar absorptance by 7.54% and increasing emissivity by 13.3%. This advancement holds promise for optimizing energy use and advancing sustainable thermal management solutions.
Researchers at POSTECH have developed an innovative approach to enhance the efficiency of thermoelectric materials by altering their geometry to resemble an hourglass shape. This breakthrough could lead to widespread applications in thermoelectric power generation, converting waste heat into electricity.
Researchers at PolyU have developed a new type of thermally-insulated and breathable soft robotic clothing that can automatically adapt to changing ambient temperatures. This innovative clothing uses soft actuators to trap a layer of air and increase thermal resistance, reducing heat stress and discomfort in high-temperature environments.
Researchers at Nagoya University developed a loop heat pipe that can transport up to 10 kW of waste heat without electricity, surpassing previous records. This technology has significant implications for energy efficiency and sustainability, particularly in the electric vehicle industry where it can reduce the need for electrical power.
Research highlights the need for further study on the impact of sustained heat exposure on hormone release and action. Heat exposure is associated with decreased fertility, increased risks of pregnancy complications and menopause symptoms, as well as worsened conditions like thyroid disorders and diabetes mellitus.
A study published in PLOS Climate found that childhood home temperatures and community connectedness can help predict how U.S. residents set their thermostats. The researchers surveyed 2,128 participants and found that those who grew up in cold-winter locales tend to dial up their thermostats higher than those raised in warmer homes.
Researchers at Norwegian University of Science and Technology have developed a technology that can harness surplus heat from industrial processes to produce drinking water and generate electricity. The technology, called membrane distillation, uses thermal osmosis to separate water from impurities.
Researchers found that older female mice receiving daily whole-body heat treatment gained less weight and showed improved insulin sensitivity. The therapy also mitigated weight gain induced by a high fat diet and reduced fat accumulation in key areas.
Researchers have developed a computer model that sheds light on extracting renewable energy from superhot, super deep rock. The model shows the formation of microscopic cracks creating a dense 'cloud of permeability' throughout the affected rock, which can lead to higher power delivery and efficiency.
A new heat-switch device developed by Nagoya University's team enhances lunar-roving vehicles' operational lifespan under harsh Moon conditions. The innovative technology reduces power consumption while maintaining efficient daytime cooling performance and nighttime insulation, making it a critical component for future lunar missions.