However, existing PCC plants are limited to a maximum efficiency of about 40 per cent, with further improvements only being achieved by upgrading to new supercritical boilers.
Cependant, l &apos; efficacité maximale des usines de CCP se limite à d &apos; environ 40 %; elles ne peuvent accomplir d &apos; améliorations qu &apos; en passant aux nouvelles chaudières supercritiques.