Agricultural PV (or agrivoltaics) is the simultaneous use of land for both agriculture and solar power generation. This year‘s Intersolar Europe in Munich will put a major focus on this topic.
About 750 million people in the world do not have access to electricity at night. Solar cells provide power during the day, but saving energy for later use requires substantial battery storage.
In Applied Physics Letters, researchers from Stanford University constructed a photovoltaic cell that harvests energy from the environment during the day and night, avoiding the need for batteries altogether. The device makes use of the heat leaking from Earth back into space—energy that is on the same order of magnitude as incoming solar radiation.
At night, solar cells radiate and lose heat to the sky, reaching temperatures a few degrees below the ambient air. The device under development uses a thermoelectric module to generate voltage and current from the temperature gradient between the cell and the air. This process depends on the thermal design of the system, which includes a hot side and a cold side.
My sister is in the process of building a house in Ohio, and I’ve been having conversations with her about how to make it green. She and my brother-in-law both consider me to be eco-crazed (arguably rightly so given the climactic and political stakes) and so tend to raise eyebrows when I make one of my many helpful suggestions.
For example, I suggested they install a central heat pump instead of inefficient electric resistance heating, but only after consulting their HVAC guy, who is a fan of heat pumps, did they decide to install one (Woo-hoo! They’ll save thousands of dollars and pounds of CO2 with that choice). They are also making their home solar-ready and plan to install panels in the next couple of years — this is mostly because solar offers a sense of self-reliance that is perennially popular across political and geographic boundaries.
However, when I tried to talk them into installing a heat pump water heater, I ran into serious resistance. If you haven’t heard about heat pump water heaters, they are an enormously powerful energy/CO2 reduction technology lying hidden in plain sight in the most humble of appliances — the water heater.
While standard solar panels can provide electricity during the day, this device can be a “continuous renewable power source” during the day and at night.
The British James Dyson Foundation presented the first Sustainability Award to Carvey Ehren Maigue, an electrical engineering student in the Philippines. He was awarded for creating new material from recycled crop waste that has the ability to transform ultraviolet (UV) rays from the sun into electrical energy. The technology could soon be turning the windows and walls of buildings into a rich new source of electricity.
The invention of the Filipino university student is called AuREUS (Aurora Renewable Energy and UV Sequestration). Both AuREUS devices (Borealis Solar Window and Astralis Solar Wall) use the same technology used in the beautiful Northern and Southern lights. High energy particles are absorbed by luminescent particles that re-emit them as visible light. A similar type of luminescent particles (derivable from certain fruits and vegetables) were suspended in a resin substrate and is used as the core technology on both devices.
Up to 50% of the energy absorbed by a solar cell is lost as heat. Scientists are now developing a third generation of “hot carrier” solar cells that take advantage of this heat, potentially breaking the Shockley-Queisser limit of silicon-based PV.
Get in, we’re going to the threshold. Solar power is undoubtfully one of the most preferred renewable energy sources of the day. As the need for energy rises with the improving technology and the rising population, companies try to come up with the most efficient solutions that promise to meet the energy demand of the world.
Taiwan’s forthcoming Sun Rock could supply excess energy to the power grid
Taiwan’s government-owned power company, called Taipower, commissioned Sun Rock, with plans to use it as a visitor facility, in addition to a storage and maintenance center for renewable energy devices. But the most obvious and impressive feature of the forthcoming project is the facade, which will be almost totally smothered in solar panels (don’t worry, there will also be vents and windows to promote the natural exchange of light and air). But 1 million kWh is a lot — the U.S. government has found that an average household uses roughly 11,000 kWh annually, which will rise (because of course it will) before the Sun Rock is finished.
Continue reading “Taiwan’s New Solar Panel ‘Sun Rock’ Will Deliver 1 Million kWh Per Year” »
Need to get 24/7 solar panels up and running.
Inspired by the cognitive science theory, we explicitly model an agent with.
Both semantic and episodic memory systems, and show that it is better than.
having just one of the two memory systems. In order to show this, we have.
designed and released our own challenging environment, “the Room”, compatible.
Continue reading “Harvesting Energy at Night: Solar Cell Keeps Working Long After Sun Sets” »
There’s still a long way to go, but it’s an important milestone.
Ten years ago, solar and wind didn’t even make up 1% of our global energy mix. Now, in just a decade, they’ve reached 10%. It may not seem like much, but becoming such a significant part of the global energy mix in such a short time is remarkable — though there’s still a long way to go.
The past couple of years have been horrendous in more ways than one, but that doesn’t mean all is bad in the world. In fact, renewable energy continued its impressive growth, according to research from Ember, a climate and energy think tank.
Continue reading “Wind and solar energy amounted to 10% of the global energy consumption in 2021” »
It is intended to be scalable and adaptable to a variety of settings, such as on the rooftops of inner-city buildings. The aim was to design and build a system that could be replicated in both rural areas and on roofs of urban building spaces.
The 130-square-foot structure is constructed from Aleppo Pine (Pinus halepensis) that was milled, dried, processed, and pressed into laminated wooden elements on-site at Valldaura. The glass roof, carefully arranged in a heliomorphic ‘diamond’ shape, allows for full solar capture both by the plants inside and the semi-transparent solar panels integrated within the glass to power the entire structure. The greenhouse only uses about 50% of the energy it produces, leaving the other half for the nearby Valldura Labs facility.
The solar-powered greenhouse also features a fully functional nutrient delivery system consisting of storage tanks, nutrient inflows, tubing to feed the plants directly, and a matrix of LED strip lights to facilitate longer growth cycles. The ground floor will be used for germinating the seedlings that will be planted in the gardens, while the upper level will generate a sizable harvest using advanced hydroponic techniques. All planting beds will use a sawdust substrate, a former waste product of the Green Fab Lab at Valldaura put to imaginative reuse.
