121 Mount Vernon St., Boston, MA 02108, USA
Phone: +1617 242 2204 Fax: +1617 242 2205
ww.mavel.com
4.6 Turbine Service Differences
The Vendor shall state the method (Ex: Hutton Formula, Moody Formula, etc.) utilized in stepping the model efficiencies to the
guaranteed prototype efficiencies.
The Vendor shall state any differences in the turbine model and the prototype unit.
Does the turbine model test include the effects of the turbine shaft in the water passage? (yes orno) No. Because shaft is
not inside the
water profile.
Does the turbine model test include actual cavitation testing? (yes or no) Yes
Was the turbine model test witnessed by an independent third party? (yes or no) (If so, Vendor shall
identify said party) Yes
The Vendor shall estimate the cost of conducting a witnessed model test if the prototype turbine It shall be discussed
does not meet its guaranteed performance data? if the prototype
turbine does not
meet guaranteed
data.
4.7 Turbine Service Requirements
ls the turbine designed to facilitate inspection of the runner without disassembling the draft tube? (yes or no) Yes
Is the turbine designed to facilitate removal and replacement of a blade without complete removal of the Yes
shaft? (yes or no)
Is the turbine designed to remove and replace runner blade seals without removing the blades? (yes or no) No
Is the upstream turbine guide bearing removable without complete removal of the shaft? (yes or no) No
Does the turbine rotor contain convenient provisions for balancing the unit in the field? (yes or no) No
Project No. 0-29029.Rev.3 www.imavel.com Jackson Mills Upgrade
