An electrician at Tripolia Hospital in Patna, operates the concentrated solar power (CSP) system on the hospital roof. The system has four large mirror dishes, which reflect the sun's rays onto a header pipe containing water. As the rays are directed onto a single point, the heat transferred is very great, and creates steam from the water. Tripolia's CSP systems now create steam to sterilise all of the hospital's medical instruments, dressings, bedsheets and laundry, using the free and renewable energy of the sun.