Agenda

121 Mount Vernon St., Boston, MA 02108, USA
Phone: +1617 242 2204 Fax: +1617 242 2205

www.mavel.com

Variable Speed, Permanent Magnet Generating Equipment
General

Mavel is not providing a proposal for the variable speed, permanent magnet generating equipment. The experience with this
equipment is it is more expensive and requires additional electrical equipment and control. There may also be interconnection

concerns with the local utility that would need to be clarified.

www.mavel.com

121 Mount Vernon St., Boston, MA 02108, USA
Phone: +1617 242 2204 Fax: +1617 242 2205

Equipment Erection, Start-Up, Commissioning and Performance

The Vendor shall estimate the required installation supervision times required for the following:

(1) Embedded Parts
(2) Turbine, Speed Increaser & Generator
(3) Control System

Estimated time for final commissioning of unit

weeks
weeks
weeks

weeks.

Project No. 0-29029.Rev.3

121 Mount Vernon St., Boston, MA 02108, USA
Phone: +1617 242 2204 Fax: +1617 242 2205

www.mavel.com

Technical Data for Hydraulic System and Governor

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121 Mount Vernon St., Boston, MA 02108, USA
Phone: +1617 2422204 Fax: +1617 242 2205

Technical Data for Speed Increaser

General Description of Speed Increaser Operation and Features:

Mechanical Rating _3_ HP at 240 RPM

INPUT
Rated Torque 431916 In-Lb
Total Weight of Speed Increaser Assembly 12125 Lb

Guaranteed Efficiencies 98.2 % at 100% Load

979 % at 75% Load

97.2 % at 50% Load
95.8 % at 25% Load

121 Mount Vernon St., Boston, MA 02108, USA
Phone: +1617 242 2204 Fax: +1617 242 2205

www.mavel.com

4.8 Technical Data for Generator

Guaranteed generator output and efficiency (at 0.9 power factor and 40°C ambient) (with turbine operating under _19.9
foot net head).

Generator Output (KW) Generator Efficiency
100% Load 1,080.7 95.9
75% Load 839.3 95.7
50% Load 556.5 95.1
25% Load 312.7 92.5

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.

121 Mount Vernon St., Boston, MA 02108, USA
Phone: +1617 242 2204 Fax: +1617 242 2205

www.mavel.com

4.4 Guaranteed Turbine Performance Data

Turbine unit speed ni1 167.27
Turbine model efficiencies, prototype outputs and efficiencies for 21.88 foot net head (NET HEAD PER IEC #41-1965, page 17)

Qu Em Q Prototype Turbine
(Unit discharge) (Model Efficiency) (cfs, prototype discharge) Efficiency Ep KW Output

121 Mount Vernon St., Boston, MA 02108, USA
Phone: +1617 242 2204 Fax: +1 617 242 2205

www.mavel.com

Technical Data for Hydraulic Turbine

The prototype turbine shall be designed for a maximum hydraulic capacity of approximately 800 cfs at 21 feet of net head. The
net head on the turbine shall be defined as Hn per IEC Standard #41-1965, Page 17.

The Vendor shall provide the following specific technical data for the proposed turbine.

121 Mount Vernon St., Boston, MA 02108, USA
Phone: +1617 242 2204 Fax: +1617 242 2205

www.mavel.com

Cavitation

The Vendor shall warrant that all turbine components be free of excessive cavitation damage during
the first 10,000 hours of operation, provided that:

(A) The minimum tailwater elevation does not fall below the 95.686 feet NAVD 88 value present in
Section 6.0.

121 Mount Vernon St., Boston, MA 02108, USA
Phone: +1617 242 2204 Fax: +1617 242 2205

www.mavel.com

SECTION 4

Technical Information

Project No. 0-29029,Rev.3 www.mavel.com Jackson Mills Upgrade