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Power & Energy

126 posts
It’s often said that supercapacitors are the future of energy storage, but for that statement to become reality, supercapacitor performance needs to increase greatly, and that is just what researchers at MIT have been working on. In a newly released study, researchers from MIT and a few other institutions have developed a novel class of liquids that could revolutionize how supercapacitors perform by increasing capacity by four or five times, improve reliability, and could reduce the risk o ...
Introduction   More experimenting with MOSFETs. In the last blog I looked at the transfer characteristics but it wasn't very easy to see from the graph I plotted where the threshold was. The threshold is measured at a drain current of 250uA and that is down in the noise for the current probe I was using. So this is a different approach to finding the threshold voltage.   Circuit   Here's the circuit I ended up with.     The current through the MOSFET is turned int ...
By 2050, nearly half of the world’s electricity will be supplied by solar and wind, effectively putting an end to energy created by coal and gas. Owners of EVs will also be able to hook up their automobile to a power grid, transferring energy back and forth between cars and houses, allowing car owners to carry renewable energy wherever they go.   However, it requires storage battery systems. Switching from a system that supplies energy through power plants running on fossil fuels to ...
This is a short follow-up to Experimenting with MOSFETS: Total Gate Charge where I looked at 'total gate charge' for an IRF730, an n-channel power MOSFET.   Since I still had the test board wired up, I thought it might be interesting to see if could get a quick plot of the transfer characteristic - the way that the drain current varies with gate voltage.   I've taken the previous circuit, bypassed the constant current generator in the drain and then plotted the drain current against ...
Introduction   More experimenting, this time with MOSFETs.   If you've ever designed with a MOSFET, I'm sure you've seen the kind of curves that are usually present in the datasheet showing the relationship between the total gate charge and the gate voltage. Here's one such graph from a datasheet for a Vishay IRF730 device:   They always have the same sort of shape to the curve, though the position of the plateau, halfway up, varies in both voltage and the amount of charge to ...
On July 18th, New York’s governor, Andrew Cuomo granted contracts for two offshore wind projects based off Long Island, expecting to reach 1,200 megawatts in capacity. The deal is the largest for offshore wind power in U.S. history, and it’s a vital part of the plan to get all power emissions-free by 2040. Equinor ASA and a joint venture between Denmark’s Orsted A/S and Massachusetts Eversource Energy were awarded the opportunity to construct the farms, creating enough energy t ...
A new study shows the rise of renewable energy and how close it is to dethroning nuclear energy. Renewable energy is growing at a fast pace. Will it be the main source of energy in the future? (Image credit: gong hangxu/iStock)   As concerns about global warming and climate change grow, the call for renewable energy keeps growing. A new article from Forbes tracks the rise of renewable energy around the world. Their findings show that while coal is still the main source of electricity aroun ...
As an engineer, I expect about 10% of everything will fail. Imagining having to fix 320,000 solar panels sounds rough...   On June 29th, the world’s largest solar plant project with 3.2 million solar panels installed across an 8-kilometer site, the Noor Abu Dhabi became fully operational, with a capacity of 1,177MW. There are also differences between this project and a ‘solar park.’ A solar park is usually an area of land marked to harness solar power and usually boast mu ...
Tesla’s secret lab in Freemont, California is currently in the process of developing battery cells. Present and former employees of Tesla have made reports on recent developments, with plans to manufacture them into their own electric vehicles. The company is dependent on Panasonic to develop battery cells at the moment and may affect future production roles, especially since Tesla signed a partnership deal with Panasonic in 2014.   Tesla’s secret battery could cut costs, ad ...
Scottish Power has announced plans to undergo a massive power project in Europe to harness UK’s wind and solar farms. The company will be connecting a massive battery, half the size of a soccer field, to the Whitelee onshore windfarm in early 2020 to acquire more power from its 215 turbines.   Scottish Power’s newest battery will help to power UK and can help with any small power fluctuations. (Image Credit: Danny Lawson - PA Images via Getty Images)   This project will ...
  The demand for electric vehicles has exploded, but supporting infrastructure still has a long way to go to realize the vision of a fossil-fuel-free world.   When is the last time you’ve seen an electric vehicle charging station? If you’re like most Americans, it has probably been a while. That is going to have to change to support the anticipated 3 million electric vehicles (EV) expected to be on the road by 2025.   Image: International Council on Clean Trans ...
The Powerpack units allow trains cutbacks on energy consumption and can be used as a backup power generator if an outage occurs. (Image Credit: Tesla)   Tesla's latest installation of their Powerpack units in Osaka, Japan invites backup power to trains in the region. Installation included 42 Powerpack units that will help to reduce peak energy demands on the grid. If an outage were to occur, trains and passengers would still be able to travel to the nearest station due to the functionality ...
Researchers from Stanford University have figured out a way to create hydrogen fuel by using solar power, electrodes and saltwater from the San Francisco Bay. As reported on March 18th in Proceedings of the National Academy of Sciences, separating hydrogen and oxygen gas from seawater with the use of electricity is a new and improved method. Current methods require the use of highly-purified water which is expensive to produce and is a valuable resource.   The device can generate hydrog ...
24M, an innovative battery company has announced the development and deliverance of commercially viable, high energy density lithium-ion battery cells. Using its SemiSolid design in its facility, the company managed to reach energy densities that exceed 250-watt-hours per kilogram - which is the highest amount for EV applications. The advanced 24M battery has significant improvements that can beat out the current technology. (Image Credit: 24M) Actual cell chemistry in the battery cell or ...
DeepMind trains the AI system on past weather forecast and histories. (Photo via pixabay)   Wind power is a popular option when it comes to clean, renewable energy. But it’s also finicky since wind is often unpredictable making it difficult to use for power grids. Google believes they may have solved that problem by using artificial intelligence. The company announced they have trained an AI system how to predict the energy output of Google’s wind farms by using DeepMind.  ...