%0 Journal Article
%T Roughness Coefficient of a Highly Calcinated Penstock
%A Kutay £¿ELEB£¿O£¿LU
%J -
%D 2019
%X When highly calcinated water is transferred through the penstock of a hydropower plant it leaves a residue on the pipe surface. Accumulated residue over time causes a change in the roughness of the pipe surface thus friction losses in the system. The effect is a change in head and discharge relation for the turbines. A multimethodology is proposed for determining the apparent surface roughness value (¦Å) by means of friction factor f and measuring arithmetic mean deviation of the roughness profile (Ra), root mean square roughness (Rq) and peak and valley roughness (Rz). It is found that a surface roughness value (¦Å) of 0.3mm can be used for calcinated surfaces which is much higher than steel surfaces but smaller than concrete
%K Friction factor
%K Surface roughness
%K Calcination
%U http://dergipark.org.tr/tekderg/issue/40564/447265