Green tech refers to a type of technology that is considered environmentally friendly based on its production process or its supply chain. Green tech—an abbreviation of "green technology"—can also refer to clean energy production, the use of alternative fuels, and technologies that are less harmful to the environment than fossil fuels.
Although the market for green technology is relatively young, it has garnered a significant amount of investor interest due to increasing awareness about the impacts of climate change and the depletion of natural resources.
Biofuels have emerged as a promising alternative to traditional fossil fuels, offering a renewable and potentially carbon-neutral way to power our world. Derived from organic material — or biomass — biofuels can be generated from a surprising variety of sources, many of which are considered waste products.
One such source is used cooking oil. Rather than discarding this byproduct of the food industry, innovative technologies are turning it into biodiesel. This form of biofuel can be used in regular diesel engines with minimal modifications, making it a practical and environmentally friendly solution for transportation.
Similarly, agricultural waste — everything from crop residues to manure — can also be transformed into energy-dense biofuels. The fermentation of these materials produces bioethanol, a type of biofuel that can replace or supplement traditional gasoline in vehicles.
Algae is another unlikely source being tapped for biofuel production. Algae-based biofuels are not only renewable but also beneficial in that algae absorb carbon dioxide as they grow, helping to offset emissions. Additionally, growing algae doesn’t compete with food production like some other biofuel sources do, making it a more sustainable choi
2.Green Hydrogen
What is green hydrogen an how is it obtained? This technology is based on the generation of hydrogen — a universal, light and highly reactive fuel — through a chemical process known as electrolysis. This method uses an electrical current to separate the hydrogen from the oxygen in water.
“Green hydrogen” is a hot topic and is quickly becoming a major component of the world’s clean energy mix. The challenges to date have been the high cost and serious safety issues associated with producing hydrogen energy. Advances in electrolyzer and fuel cell technology are narrowing the gap on the cost issue. Plus, new sensor technology is making it safer to produce, transport and use hydrogen energy in either combustion or electrochemical processes.
3.Artificial photosynthesis
Artificial photosynthesis is a process that mimics a very famous biochemical reaction: natural photosynthesis. The artificial photosynthesis system includes an enzyme bed reactor to fix CO2 in the air (or any other source needing CO2 to be removed). This reactor is fueled by hydrogen energy and bioelectric transducers
Artificial photosynthesis as a chemical process replicates natural photosynthesis to reduce anthropogenic carbon dioxide (CO2), increase fuel security, and provide a sustainable global economy (Faunce et al., 2013). Because of the development of some suitable technologies, we can develop artificial photosynthesis using artificial leaves for the efficient conversion of solar energy into H2 and other fuels (Centi & Perathoner, 2010, 2011). This method may be a potential technology for H2 production by mimicking natural photosynthesis by green leaves
The variable thermal loads resulting from the different IC engine and electric motor propulsion system duty cycles and load profiles creates a need for thermally responsive controllable variable cooling output.
The CVF system can be applied to both the high and low temperature circuits to provide efficient variable flow to achieve optimal thermal management and can be either mechanically or electrically driven and actuated. Figure 12depicts a fully electrically driven (variable speed) dual pump system. The alternative dual CVF system in Figure 13 is depicted with electric drive and mechatronic variable output actuation, although the mechanical drive and actuation version as depicted in Figure 11 may also be used as a lower cost and mass alternative.
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