Research shows how common plastics could passively cool and heat buildings with the seasons
Researchers at Princeton and UCLA have developed a passive mechanism to cool buildings in the summer and warm them in the winter.
Jun 27, 2024
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Energy & Green Tech
Researchers at Princeton and UCLA have developed a passive mechanism to cool buildings in the summer and warm them in the winter.
Jun 27, 2024
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54
Engineering
As energy and environmental crises rampage, sustainable solutions like ground source heat pump (GSHP) systems gain traction. GSHP systems use consistent geothermal energy below the earth's surface to provide heating and cooling ...
Jun 27, 2024
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Energy & Green Tech
Painting roofs white or covering them with a reflective coating would be more effective at cooling cities like London than vegetation-covered "green roofs," street-level vegetation or solar panels, finds a new study led by ...
Jul 4, 2024
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152
Energy & Green Tech
Hydrogen fuel cells, devices that can convert the chemical energy stored in hydrogen into electrical energy via an electrochemical reaction, are promising solutions for electrifying large vehicles. Fuel cells based on low-temperature ...
Energy & Green Tech
High-capacity lithium-ion batteries (LIBs) could play a crucial role in the electrification of vehicles and other large electronics. To successfully deploy these batteries on a large scale, however, engineers will first need ...
Engineering
For those living in cities, space to play sports outside can be a scarcity. Recently, natural grass in parks or public sports courts has often been replaced with more durable artificial turf to allow heavy consecutive use.
Jul 9, 2024
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38
Engineering
A team of South Korean researchers has developed an innovative haptic (tactile) display technology that is attracting global attention. This innovation allows users to physically experience 3D shapes and various textures, ...
Jun 26, 2024
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67
Energy & Green Tech
Electric vehicles, large-scale energy storage, polar research and deep space exploration all have placed higher demands on the energy density and low-temperature performance of energy storage batteries. In recent years, lithium ...
Jul 2, 2024
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35
Engineering
Power plants, factories, car engines—everything that consumes energy produces heat, much of which is wasted. Thermoelectric devices could capture this wasted heat and convert it into electricity, but their production has ...
Jul 2, 2024
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63
Electronics & Semiconductors
An engineering research team led by Professor Yue Chen from the Department of Mechanical Engineering at the University of Hong Kong (HKU) has achieved a remarkable milestone in the realm of thermal transport in crystals.
Jun 25, 2024
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In physics, temperature is a physical property of a system that underlies the common notions of hot and cold; something that feels hotter generally has the higher temperature. Temperature is one of the principal parameters of thermodynamics. If no heat flow occurs between two objects, the objects have the same temperature; otherwise heat flows from the hotter object to the colder object. This is the content of the zeroth law of thermodynamics. On the microscopic scale, temperature can be defined as the average energy in each degree of freedom in the particles in a system. Because temperature is a statistical property, a system must contain a few particles for the question as to its temperature to make any sense. For a solid, this energy is found in the vibrations of its atoms about their equilibrium positions. In an ideal monatomic gas, energy is found in the translational motions of the particles; with molecular gases, vibrational and rotational motions also provide thermodynamic degrees of freedom.
Temperature is measured with thermometers that may be calibrated to a variety of temperature scales. In most of the world (except for Belize, Myanmar, Liberia and the United States), the Celsius scale is used for most temperature measuring purposes. The entire scientific world (these countries included) measures temperature using the Celsius scale and thermodynamic temperature using the Kelvin scale, which is just the Celsius scale shifted downwards so that 0 K= −273.15 °C, or absolute zero. Many engineering fields in the U.S., notably high-tech and US federal specifications (civil and military), also use the kelvin and degrees Celsius scales. Other engineering fields in the U.S. also rely upon the Rankine scale (a shifted Fahrenheit scale) when working in thermodynamic-related disciplines such as combustion.
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