Underground Pumped-Storage Hydropower Station
 
 In today's world it is essential to recover more and more energy from sustainable sources. This, and the need for a reliable supply of electrical energy at all times, creates a demand for systems that match a variable energy production with the energy demand pattern. This article presents such a system.
In today's world it is essential to recover more and more energy from sustainable sources. This, and the need for a reliable supply of electrical energy at all times, creates a demand for systems that match a variable energy production with the energy demand pattern. This article presents such a system.By A.F.M. van Velsen, Royal Haskoning, The Netherlands
 
             
                 
                


 
   
                

 
                
