Proof-of-concept nanogenerator turns CO₂ into sustainable power
University of Queensland researchers have built a generator that absorbs carbon dioxide (CO2) to make electricity.
13 hours ago
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University of Queensland researchers have built a generator that absorbs carbon dioxide (CO2) to make electricity.
13 hours ago
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Aside from water, concrete is the most-used material in the world, with about 14 billion cubic meters being used every year. Of that, 40% of that is used to build places for people to live.
9 hours ago
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An electricity market analysis found adding battery storage to enhance grid reliability caused power generation markets to favor coal over natural gas.
Apr 11, 2024
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China has extended its manufacturing domination to clean energy industries in recent years, alongside a global push for climate change action, but that is starting to worry the United States, Europe and others.
Apr 5, 2024
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A team of physicists and engineers at Technical University of Denmark reports that it is possible to build a working selenium–silicon tandem solar cell, a combination that could theoretically improve the efficiency of solar ...
Following last week's crackdown on car emissions, President Joe Biden's administration on Friday unveiled finalized pollution standards for trucks, placing vehicle tailpipes at the forefront of his climate crisis agenda.
Mar 29, 2024
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Renovating buildings to improve their energy efficiency is a crucial step towards Switzerland achieving its climate targets. ETH Zurich researchers can now reveal the most effective renovation strategies for reducing greenhouse ...
Mar 21, 2024
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More than 30 countries—including European nations, the United States, Brazil and China—took part on Thursday in the first-ever summit held by the United Nations' atomic energy agency to promote nuclear as a "clean and ...
Mar 21, 2024
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A greenhouse (also called a glasshouse) is a building in which plants are grown. These structures range in size from small sheds to very large buildings. A miniature greenhouse is known as a cold frame.
A greenhouse is a structure with different types of covering materials, such as a glass or plastic roof and frequently glass or plastic walls; it heats up because incoming visible solar radiation (for which the glass is transparent) from the sun is absorbed by plants, soil, and other things inside the building. Air warmed by the heat from hot interior surfaces is retained in the building by the roof and wall. In addition, the warmed structures and plants inside the greenhouse re-radiate some of their thermal energy in the infra-red, to which glass is partly opaque, so some of this energy is also trapped inside the glasshouse. However, this latter process is a minor player compared with the former (convective) process. Thus, the primary heating mechanism of a greenhouse is convection. This can be demonstrated by opening a small window near the roof of a greenhouse: the temperature drops considerably. This principle is the basis of the autovent automatic cooling system. Thus, the glass used for a greenhouse works as a barrier to air flow, and its effect is to trap energy within the greenhouse. The air that is warmed near the ground is prevented from rising indefinitely and flowing away.
Although there is some heat loss due to thermal conduction through the glass and other building materials, there is a net increase in energy (and therefore temperature) inside the greenhouse.
Greenhouses can be divided into glass greenhouses and plastic greenhouses. Plastics mostly used are PEfilm and multiwall sheet in PC or PMMA. Commercial glass greenhouses are often high tech production facilities for vegetables or flowers. The glass greenhouses are filled with equipment like screening installations, heating, cooling, lighting and may be automatically controlled by a computer.
This text uses material from Wikipedia, licensed under CC BY-SA