Engineering
As the planet gets hotter, the need for cool living environments is becoming more urgent. But air conditioning is a major contributor to global warming since units use potent greenhouse gases and lots of energy.
Sep 25, 2023
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Energy & Green Tech
According to the World Meteorological Organization, greenhouse gas concentrations have reached a record high. In the case of carbon dioxide (CO2),the growth in 2020 exceeded the average for the last decade; despite a 5.6% ...
Dec 8, 2021
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Energy & Green Tech
Chile on Tuesday inaugurated Latin America's first-ever thermosolar energy plant, a vast complex dubbed Cerro Dominador in the Atacama desert that gives a boost to the country's quest for carbon-neutrality by 2050.
Jun 9, 2021
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Energy & Green Tech
The energy available from sunlight is 10,000 times more than what is needed to supply the world's energy demands. Sunlight has two main properties that are useful in the design of renewable energy systems. The first is the ...
May 25, 2021
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Energy & Green Tech
Smart window technology that can automatically adjust the amount of sunlight entering the room by changing the color of the window depending on the intensity of sunlight has been developed by a domestic research team.
May 28, 2020
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Hardware
Thermal imaging cameras provide important information about differences in temperature in the vicinity. Depending on the application, they can, for example, visualize the body temperature of patients and visitors in hospitals ...
Dec 14, 2022
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Sunlight, in the broad sense, is the total spectrum of the electromagnetic radiation given off by the Sun. On Earth, sunlight is filtered through the atmosphere, and the solar radiation is obvious as daylight when the Sun is above the horizon. Near the poles in summer, the days are longer and the nights are shorter or non-existent. In the winter at the poles the nights are longer and for some periods of time, sunlight may not occur at all. When the direct radiation is not blocked by clouds, it is experienced as sunshine, a combination of bright light and heat. Radiant heat directly produced by the radiation of the sun is different from the increase in atmospheric temperature due to the radiative heating of the atmosphere by the sun's radiation. Sunlight may be recorded using a sunshine recorder, pyranometer or pyrheliometer. Sunlight takes about 8.3 minutes to reach the Earth. The World Meteorological Organization defines sunshine as direct irradiance from the Sun measured on the ground of at least 120 watts per square metre.
Direct sunlight has a luminous efficacy of about 93 lumens per watt of radiant flux, which includes infrared, visible, and ultra-violet light. Bright sunlight provides luminance of approximately 100,000 candela per square meter at the Earth's surface.
Sunlight is a key factor in photosynthesis, a process crucially important for life on Earth.
This text uses material from Wikipedia, licensed under CC BY-SA
