If a steam power plant with csp (central reciver) that gives 10 MWe with tower long 100m and want to scale-up the plant to produce 20 MWe , the change in the plant is to make the hilostate filed biger and incrase the tower tall , or we increase the hilostate filed and change the hilostate driven and elimenate the change in the tower diamention (100m) to reduce the cost.