6 Matching Annotations
  1. Aug 2023
      • for: energy storage, battery storage, pumped hydro, PSH
      • description
        • Recent studies indicate that pumped hydro can play a significant role in energy storage for a 100% renewable energy system
    1. According to the International   Hydropower Association, or IHA, a  facility with two reservoirs roughly   the size of two Olympic swimming pools, and  a 500-metre height difference between them,   would have an energy capacity of about three and  a half megawatt hours. And they last for decades,
      • for: pumped hydro storage capacity, pumped hydro, PSH
      • paraphrase
        • According to the International Hydropower Association, or IHA,
          • a facility with:
            • two reservoirs roughly the size of two Olympic swimming pools,
            • a 500-metre height difference between them,
          • would have
            • an energy capacity of about three and a half megawatt hours and
            • they last for decades,
  2. Jan 2023
    1. Energy Storage Cost and Performance Database

      Energy Storage Cost and Performance Database. U.S. Department of Energy

    1. Expansion is led by focus. By taking time to edit, carve up, and refactor our notes, we put focus on ideas. This starts the Great Wheel of Positive Feedback. All hail to the Great Wheel of Positive Feedback.

      How can we better thing of card indexes as positive feedback mechanisms? Will describes it as the "Great Wheel of Positive Feedback" which reminds me a bit of flywheels for storing energy for later use.

  3. Mar 2022
    1. The steel tower is a giant mechanical energy storage system, designed by American-Swiss startup Energy Vault, that relies on gravity and 35-ton bricks to store and release energy.

      Like pumped hydro with rocks