Renewable Energy Forum

 With emerging trend of solar power the most fundamental concern is the climate dependency  of the power generation. That is , power is generated when the sun is available and not necessarily when the demand is high.  The electric power grid operates based on a delicate balance between supply (generation) and demand (consumer use). One way to help balance fluctuations in electricity supply and demand is to store electricity during periods of relatively high production and low demand, then release it back to the electric power grid during periods of lower production or higher demand. In some cases, storage may provide economic, reliability, and environmental benefits. Depending on the extent to which it is deployed, electricity storage could help the utility grid operate more efficiently, reduce the likelihood of brownouts during peak demand, and allow for more renewable resources to be built and used. Energy can be stored in a variety of ways, including: Pumped hydroelect...

Solar power is a technology people around the world are keen to perfect. With many governments pledging to reach net-zero over the next 10 to 30 years, securing reliable alternatives to fossil fuels is essential. Researchers at GlobalData  believe that space-based solar power (SBSP) could be the key to a total transition to green energy. SBSP involves using mirror-like reflectors, which are positioned on satellites moving around Earth’s orbit. These reflectors would concentrate the sun’s energy onto solar panels, allowing for power to be harnessed outside of daylight hours. At the moment solar panels collect power for an average of 29 per cent of the day, but SBSP would mean they could be illuminated 99 per cent of the time. For now, SBSP is purely conceptual, but scientists do believe it could be a reality soon. The US Naval Research Laboratory conducted its first test in this field in May last year. Earlier this year scientists in South Korea created  the first fully transpa...

  A material commonly used in solar panels has been found to repair itself when damaged - and scientists think this ability could be vital for the future of clean energy. The substance, called antimony selenide, is what’s known as a solar absorber material. This means it can be used to harness solar energy and convert this power into electricity. The  team at the University of York, UK  who made the discovery are now looking at how this technology could be used to create longer-lasting solar panels, which could potentially 'self-heal' when damaged. One of the biggest hindrances to progress in this type of technology is the reliability and longevity of cells. Currently, solar panels have an average lifespan of between 25-30 years, so developing technology which can repair itself could be a crucial breakthrough. Antimony selenide’s surprising self-healing capability is similar to when a starfish or reptile regrows a limb after an accident, explains Professor Keith McKenna w...

  Wind and solar are intermittent energy resources. Therefore, the energy supply from these resources is not predictable. In theory however, this situation can be solved easily. To get a constant power output from a solar or wind power system, it is only necessary to size the system larger and to store the surplus energy for later use. In practice, however, the solution is not so simple because large-scale Energy Storage Systems (ESS) are currently quite expensive. There are three emerging technologies in ESSs that could become viable for solar and wind in the near future. Smart batteries Thermal energy storage Hydrogen fuel cells Smart Batteries - this is perhaps the first ESS that comes to mind when the concept is mentioned. Moreover, it is in the limelight since the launch of the Tesla Powerwall. The principle is simple: surplus generation from solar or wind power systems is stored in batteries and used when it is needed or when it is considered convenient. Batteries equipp...

 Use this link to view the page :  Commands

December 20, 2019 Jason Svarc  What is AC or DC coupling? AC or DC coupling refers to the way solar panels are coupled or linked to an energy storage or battery system. The type of electrical connection between a solar array and a battery can be either Alternating Current (AC) or Direct Current (DC). AC is when the current flows rapidly forward and backwards (this is what the electricity grid uses to operate) and DC is where the current flows in one direction. Most electronic circuits use DC, while solar panels produce DC, and batteries store DC energy. However, most electrical appliances operate on AC. This is why all homes and businesses have AC circuits. DC can be converted to AC using an inverter but, as explained below some energy is always lost in the conversion. The Solar battery evolution Simple DC coupled solar battery systems were once used only for remote power systems and off-grid homes, but over the last decade inverter technology advanced rapidly and led to the devel...