what’s in that powerhouse? - nwhydro.org · ogood hydroelectric power plant locations = high...
TRANSCRIPT
© 2014 HDR, all rights reserved.
Civil Works (or) What’s holding things together?
What’s in that Powerhouse?
Harness the energy in its raw form (water)
oGood hydroelectric power plant locations = High water energy =
challenging terrain
oPotential energy in water is proportional to the mass (weight) and
head (pressure)
oNeed to get all that mass to the turbine and generator equipment
without losing energy (head)
Provide support and protection for personnel and equipment
Next slides – overview of civil works from upstream to
downstream
The Purpose of the Civil Works –
Intake Includes:
o Trash handling equipment
o Fish handling equipment
o Intake gate or bulkhead
o Support cranes, power supplies, etc.
Getting the water to the machines
Purpose:
o Exclude debris
o Penstock closure
o Minimize head loss
(vortexing,
turbulence,
trashrack plugging)
Penstocks, etc
o Penstock usually means pressurized pipe
o Penstock may be exposed, encased, in a
tunnel
o Tunnel itself may serve as penstock
Goals
o Safety
o Minimize head loss
Getting the water to the machines
Features other than penstock
o Power canal
o Flume
o Surge Tank
Considerations
o Weather
o Safety
Getting the water to the machines
Powerhouse types
o Open
o Enclosed
o Underground
Support the men and machines
Equipment Support
o Turbine
o Generator
o Draft tube bulkheads, step-up transformers,
cranes, etc.
O&M support
o Working environment
o Storage and working space
Support the machines
Equipment Support
o Intake and draft tube cranes
o Step-up transformers and take-off structures
o Gate and bulkhead storage
O&M support
o Working environment
o Storage and working space
Support the ancillary equipment
Tailrace
o Important for turbine performance
• High water impacts powerhouse design and
turbine output
• Low water impacts turbine performance
o Plant operation may have downstream impacts
Getting water away from the machines
All-weather, All-load roads
Warehouse and office space
Electric power step-up, switching yards
Fish passage
Recreation
Access and other supporting features
Thank you for your attention
Closing