Posts

Showing posts with the label Pumped Hydro

How can the exhausted coal mines can be used?

Image
Dhanbad Coal mines in India Introduction Coal mining, a practice essential to powering the world’s energy needs, comes in two main types: open-pit (or open-cast) and underground (or closed) mining. These methods of coal extraction have left vast expanses of land transformed by mining activities, and as coal reserves deplete, many mines are eventually exhausted. However, these sites present opportunities for repurposing, particularly for renewable energy projects like pumped hydro storage, which can play a significant role in maintaining energy balance as we transition away from fossil fuels. Globally, coal mining has a significant footprint. As of 2024, 29 countries are actively involved in coal mining, with India being one of the leading producers. However, many mines across these regions have reached the end of their productive lives, resulting in either closures or abandonment. These exhausted mines pose environmental challenges but also provide a unique opportunity for sustainable

What is Energy Storage Systems ?

Image
Energy storage refers to the capture of energy produced at one time for use at a later time. This process allows for greater flexibility and reliability in managing energy supply, particularly with the increasing use of renewable energy sources like wind and solar, which are intermittent in nature. Energy storage systems can store energy in various forms, such as electrical, thermal, chemical, mechanical, and gravitational energy. Types of Energy Storage: Battery Storage : Lithium-Ion Batteries : The most common type of battery storage, widely used in electric vehicles (EVs) and grid storage. They offer high energy density, efficiency, and a long lifecycle. Lead-Acid Batteries : An older technology, still used in some stationary applications, but less efficient and with a shorter lifespan than lithium-ion. Flow Batteries : Store energy in liquid electrolytes, offering scalability and long discharge times, ideal for large-scale energy storage. Pumped Hydro Storage : Uses gravitational p