Brian Murtha

Engineering for SH Operations
Voith’s new StreamDiver® technology
StreamDiver | B Murtha, NWHA Sisters Oregon | 2014-09-04
1
97% of existing dams in the US are not used for hydropower and similarly with
85% worldwide.
Today the investment costs and projected operating costs are too high for
attractive new development.
Tough environmental regulations prolong the approval process and upfront
increase
the investment costs.
StreamDiver | B Murtha, NWHA Sisters Oregon | 2014-09-04
2
Utilizing New Hydro Power Potential
Hydro Power
Potential
Innovative Plant
Concepts
New Requirements
for E+M Equipment
• submersible
design
• limited
accessibility
• low maintenance
• oil free solutions
• ‘Set-and-forget’
StreamDiver | B Murtha, NWHA Sisters Oregon | 2014-09-04
3
Contents
 Technical highlights
 Plant concepts
 Proof of concept
 Expected operations and maintenance
StreamDiver | B Murtha, NWHA Sisters Oregon | 2014-09-04
4
Potential Sites
• Irrigation canals
• Undeveloped / underdeveloped dams (marginally feasible)
• Remote locations
• Modernization of decommissioned plant
• Complete unit replacement
• Aesthetic restrictions
StreamDiver | B Murtha, NWHA Sisters Oregon | 2014-09-04
5
Key Operational Features
• No powerhouse
• Minimized ancillaries
• Standardized sizes
Basic Design Philsophy of the StreamDiver:
Fewer moving parts means fewer potential failure points.
StreamDiver | B Murtha, NWHA Sisters Oregon | 2014-09-04
6
The StreamDiver Concept
2
1
3
2
4
5
1 Permanent magnet generator
• Water-floated
2 Thrust and guide bearings
• Water-lubricated
3 Turbine bulb
• Water-filled
• No dynamic seals
4 Turbine housing with fixed
guide vanes
5 Propeller runner
High availability, low maintenance and minimal peripheral systems
StreamDiver | B Murtha, NWHA Sisters Oregon | 2014-09-04
7
Standardization
Modular concept with 5 different runner diameter
•
Runner diameter between
790mm – 1310mm
•
Overlapping application range
•
Best combination of
StreamDiver module and no. of
units based on project specific
hydraulic data
Flow[cfs]
450
70
6
Head [ft]
30
StreamDiver | B Murtha, NWHA Sisters Oregon | 2014-09-04
8
Grid Connection Variants
PMG
PMG
Grid
Direct grid connection:
• Synchronization by draft-tube gate
• High efficiency
• No flow rate or reactive power regulation
Grid
Grid connection with reactive power regulation:
• Reactive power regulation possible
• High efficiency
• No flow rate regulation
Grid
Grid connection with frequency converter:
• Reactive power regulation possible
• Flow regulation via variable-speed operation
• Efficiency optimization possible
CB
CB
C
PMG
CB
FC
StreamDiver | B Murtha, NWHA Sisters Oregon | 2014-09-04
9
Contents
 Technical highlights
 Plant concepts
 Proof of concept
 Expected operations and maintenance
StreamDiver | B Murtha, NWHA Sisters Oregon | 2014-09-04
10
Flexible Power Plant Integration
The plant configuration process
will be influenced by local site
condition, the owner/operater and
local regulations.
StreamDiver | B Murtha, NWHA Sisters Oregon | 2014-09-04
11
Development
aSisters
flood-regulating
weir with StreamDiver.
StreamDiver | B Murtha,of
NWHA
Oregon | 2014-09-04
12
StreamDiver | B Murtha, NWHA Sisters Oregon | 2014-09-04
13
The turbines are integrated within a movable frame and regulated (grid
synchronization
and
shut-down) with a gate valve.
StreamDiver | B Murtha, NWHA
Sistersturbine
Oregon | 2014-09-04
14
Both gate and turbine can be retrieved for maintenance works without dewatering of the intake chamber.
StreamDiver | B Murtha, NWHA Sisters Oregon | 2014-09-04
15
Development
ecologically
sensitive regions with the StreamDiver
StreamDiver | B Murtha,of
NWHA
Sisters Oregon | 2014-09-04
16
StreamDiver
retrieval.
StreamDiver | B Murtha,
NWHA Sisters Oregon | 2014-09-04
17
Contents
 Technical highlights
 Plant concepts
 Proof of concept
 Expected operations and maintenance
StreamDiver | B Murtha, NWHA Sisters Oregon | 2014-09-04
18
Full Scale Prototype Nussdorf
• R&D Project between Voith/Kössler, Verbund, EVN and Wienstrom
• Exchange of existing 500 kW turbine by a StreamDiver
• Operating experience since August 2012 with direct grid
connection and frequency converter application
StreamDiver | B Murtha, NWHA Sisters Oregon | 2014-09-04
19
Component Tests
Hydraulic Development:
• Model tested hydraulic profiles
• Currently model test for a new
hydraulic profile ongoing
Bearing Test Rig:
• Test of bearing concept and lifetime
• Service intervals of bearings
investigated within an 16.000 h
operating period
StreamDiver | Hydroenergia 2014 | 2014-05-22
20
Contents
 Technical highlights
 Plant concepts
 Proof of concept
 Expected operations and maintenance
StreamDiver | B Murtha, NWHA Sisters Oregon | 2014-09-04
21
Known and expected maintenance
• Pilot has been in operation continuously* for 16,000 hours
– * One plant load rejection shut down unit
•
Expected maintenance
– Continuous operation expected
– 5 year cycle for unit inspection to inspect / replace wear
elements (bearing pads, shaft ends)
– 50+ years expected lifetime
StreamDiver | B Murtha, NWHA Sisters Oregon | 2014-09-04
22
StreamDiver | B Murtha, NWHA Sisters Oregon | 2014-09-04
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