Water Power and Dam Construction. Issue October 2010
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INTERNATIONAL WATER POWER & DAM CONSTRUCTION OCTOBER 2010
OCTOBER 2010
Serving the hydro industry for over 60 years
LiDAR technology for dam inspections
How predictable are water resources?
LiDAR technology for dam inspections
Underwater forestry
Removing submerged trees from reservoirs
INTERNATIONAL
& DAM CONSTRUCTION
WWW.WATERPOWERMAGAZINE.COM
OCTOBER 2010
& DAM CONSTRUCTION
WWW.WATERPOWERMAGAZINE.COM
Water Power
001wp1010fc.indd_CS.indd 1 13/10/10 16:46:38
INTERNATIONAL
& DAM CONSTRUCTION
Water Power
WWW.WATERPOWERMAGAZINE.COM
CONTENTS
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*/5&3/"5*0/"-8"5&3108&3%".$0/4536$5*0/t*44/97olumeNumbertOCTOBER 2010 3
DAM
ENGINEERING
ModernPowerSystems
COMMUNICATING POWER TECHNOLOGY WORLDWIDE
COVER: Learn more about the
removal of trees from reservoirs on
p34. Photograph courtesy of Triton
Logging
29
10
24
16
38
PROFESSIONAL DIRECTORY
40
WORLD MARKETPLACE
REGULARS
4
WORLD NEWS
8
DIARY
FEATURES
NEW TECHNOLOGY
10
Taking care of turbines
Detailing new turbine technology from CARE Electric
11
Products and applications
Information on the latest product releases in the industry
INSIGHT
12
How predictable are water resources?
Some water resources might be more predictable than
previously thought, writes Dr Peter Mason
CONSTRUCTION
16
A quiet revolution
UK renewable energy legislation has driven innovative
new applications of hydropower technology
20
Building Jinanqiao Dam
Detailing the design and construction of the Jinanqiao
RCC gravity dam in China’s Yunnan Province
DESIGN
23
Standard approach to turbine R&D
Research looks at small, standardised pump-turbines
INSPECTION
24
Fault finding at Martis Creek Dam
LiDAR technology was used during a major inspection
SPILLWAYS
26
New spillway for Ulley Dam
Rehabilitation works included the addition of a new
spillway in the centre of this UK dam
29
Glorious spillways
Learn more about the morning glory type spillway
30
Investigating Val Noci
Physical model investigations were carried out on the
morning glory spillway at Val Noci dam in Italy
ENVIRONMENT
34
What lies beneath
Underwater forestry put to use at reservoirs
37
Seeing is believing
Addressing community fears at Allain Duhangan, India
4 OCTOBER 2010 INTERNATIONAL WATER POWER & DAM CONSTRUCTION
WORLD NEWS
I
NVESTOR-OWNED WATER AND
wastewater utility California
American Water has filed an
application with the California
Public Utilities Commission (CPUC)
requesting permission to remove
San Clemente Dam on the Carmel
River in what has been described as
a ‘landmark’ project.
California American Water is
partnering with the National Oceanic
and Atmospheric Administration’s
(NOAA) National Marine Fisheries
Service and the California State
Coastal Conservancy to imple-
ment the dam removal project in
order to resolve seismic safety
concerns associated with the
dam and restore critical habitat
for the steelhead trout. The util-
ity has committed $49M and the
dedication of 928 acres where the
dam is located as parkland. The
Coastal Conservancy and NOAA com-
mitted to raise the additional $35M
needed for the removal project
through a combination of public
funding and private donations.
The San Clemente Dam is a 106ft
high concrete-arch dam built in 1921,
eighteen miles from the ocean on the
Carmel River, to supply water to the
Monterey Peninsula’s then-burgeoning
population and tourism industry.
Today the reservoir is over 90% lled
with sediment and has a limited water
supply function.
In 1991, the California Department
of Water Resources, Division of
Safety of Dams agreed with a
California American Water consult-
ant’s assertion that San Clemente
Dam did not meet modern seismic
stability and ood safety standards.
The Department of Water Resources
and Army Corps of Engineers studied
many ways to ameliorate the safety
issues including strengthening the
dam and removing the dam.
T h e J a n u a r y 2 0 0 8 F i n a l
Environmental Impact Report and
Environmental Impact Statement
regarding San Clemente Dam’s stabil-
ity contains analysis of a Reroute and
Removal Project, which would address
the seismic and flood safety risks
associated with San Clemente Dam
by permanently re-rerouting a portion
of the Carmel River and removing the
dam. Under this proposal, the Carmel
River would be rerouted to bypass
the 2.5 million cubic yards of silt that
have accumulated behind the dam,
thereby avoiding dredging, which has
been deemed infeasible.
The primary benefits of the
Reroute and Removal Project are
that it improves the Carmel River
environment by removing the dam,
which serves as a barrier to fish
passage, and satises government
agencies’ concerns that strengthening
the dam, as opposed to removing it,
could further threaten the South
Central California Coast Steelhead
and violate the federal Endangered
Species Act.
“From an engineering and
environmental perspective, this is
a landmark project,” said California
American Water president Rob
MacLean. “Our innovative method
for dealing with the sedimentation
behind the dam and the level of
public-private cooperation which has
made this plan a reality will serve as
a template for the removal of other
obsolete dams across the country.”
US utility seeks permission for
‘landmark’ dam removal project
First wave energy device connected to US grid
O
CEAN POWER TECHNOLOGIES,
Inc (OPT), in conjunction with
the US Navy, has completed
the rst-ever grid connection of a wave
energy device in the US at the Marine
Corps Base Hawaii (MCBH).
The PB40 PowerBuoy is part of
OPT’s ongoing program with the
US Navy to develop and test the
Company’s PowerBuoy wave energy
technology. The project began as a
Small Business Innovation Research
(SBIR) program at the Office of
Naval Research (ONR). Key program
goals include demonstrating system
reliability and survivability, and the
successful interconnection with the
grid serving MCBH.
The PowerBuoy was deployed on
December 14, 2009 approximately
three-quarters of a mile off the coast
of Oahu in water depth of 100ft. To
date, the PowerBuoy has operated
and produced power from over 3
million power take-off cycles and 4400
hours of operation. The PowerBuoy
grid interface was certied in 2007
by an independent laboratory, Intertek
Testing Services, as compliant with
national and international standards,
including the safety standards UL1741
and IEEE1547, and also bears the ETL
Listed mark.
The system h as numerou s
on-board sensors that monitor a
wide variety of system performance
variables, external conditions and
lifecycle parameters. Data collected by
on-board computers is transmitted to
a shore-based facility via a ber optic
cable embedded in the submarine
power transmission cable and then
transmitted via the Internet to OPT’s
facility in Pennington, New Jersey.
The Company’s engineers have
collated much of this data and
compared it to OPT’s proprietary
models which analyze the performance
given actual in-coming wave conditions.
This information has provided a strong
correlation between the ‘actual’ and
‘expected’ system performance, which
serves to conrm OPT’s models for its
higher output PowerBuoys, including
the PB150.
The wave power project at MCBH
underwent an extensive environmen-
tal assessment by an independent
environmental firm in accordance
with the National Environment Policy
Act (NEPA) that resulted in a Finding
of No Significant Impact (FONSI).
The FONSI is the highest rating
assigned. The project has utilized
local Hawaiian subcontractors,
including Sea Engineering Inc. for
the installation, test and servicing of
the systems.
Plans for 100MW tidal energy project unveiled
E
SB INTERNATIONAL (ESBI)
AND Marine Current Turbines
(MCT) have agreed to develop
an initial phase of a 100MW tidal
energy project off the Antrim coast in
Northern Ireland.
ESBI and MCT will submit a proposal
to the forthcoming Marine Leasing
Round in Northern Ireland, the first
step in securing an Agreement for
Lease from the Crown Estate to
commence formal consenting of the
project. If successful, the initial phase
of the project, which will use the MCT
SeaGen device, could be in operation
by 2018.
ESBI is currently preparing an
environmental scoping report on the
project as an initial step in undertaking
a full environmental impact assess-
ment. In order to gain a thorough
understanding of the tidal potential,
it has also undertaken tidal resource
measurements off the Antrim coast
over the summer months. This data
is currently being analysed and it is
planned to undertake further surveys
in the coming months.
“We look forward to working with
MCT on this new project. Our aim is
to use our experience and technical
strength to support the development
of a viable ocean energy industry in
Ireland and this project is an important
step in realising that goal,” said ESB
Chief Executive, Padraig McManus.
“Our agreement with ESBI, which
has been a valued shareholder in
MCT for two and a half years, conrms
MCT’s tidal technology at being in the
forefront in the race to harness the
power of tides,” added Martin Wright,
Managing Director of Marine Current
Turbines. “We are pleased that ESBI
has chosen MCT to develop the initial
phase of this project.”
A 1.2MW SeaGen project has
been operating in Northern Ireland’s
Strangford Lough since April 2008 and
last month achieved an operational
milestone by delivering its 2 millionth
kWh of power to the grid.
WWW.WATERPOWERMAGAZINE.COM OCTOBER 2010 5
WORLD NEWS
T
HE GOVERNMENTS OF PAPUA New
Guinea (PNG) and Queensland
will today sign a Memorandum
of Cooperation with PNG Energy
Developments Ltd (PNG EDL) and Origin
Energy Limited to support the potential
development of a 1800MW hydro
scheme in the Gulf Province of PNG.
PNG EDL, a 50:50 joint venture
between Origin and PNG Sustainable
Development Program Ltd, is evaluat-
ing the hydroelectric potential of the
Purari Hydro Resource at Wabo.
“The PNG Government is proud of
achieving this milestone where the
governments of Queensland and PNG
as well as the private sector can come
together in this strategic partnership
to develop such an important project,”
said PNG Deputy Prime Minister and
Minister for Works and Transport, the
Honourable Don Pomb Polye MP. “The
PNG Government is happy for the PNG
Sustainable Development Program
and Origin to partner with our two
States in realising our potential.”
The proposed project – which
would have the capacity to generate
approximately 1800 MW of renewable
baseload electricity - would provide a
reliable source of power for remote
villages and rural communities in PNG
and transform the area’s economic
development prospects. Electricity
would also be exported using via
Weipa to join the national electricity
grid at Townsville.
“Access to reliable energy such
as this may help open up signicant
industrial development in PNG,” added
Queensland Premier Anna Bligh. “But
for an energy project of this size to
be viable PNG needs a baseload
customer for the power. Under this
partnership Queensland looks to
become that baseload customer.
“Put simply what that means is
if successful this project will be a
massive win/win for both PNG and
Queensland opening up new opportu-
nities for all of us.”
Origin Managing Director, Grant
King said the ongoing assessment
of the project was consistent with
Origin’s pursuit of a portfolio of renew-
able energy opportunities in Australia
and select offshore markets. “This
would be the rst project to deliver
year-round baseload renewable energy
into mainland Australia,” he said.
A series of engineering and
environmental studies undertaken over
the past 30 years have identied the
Wabo site as a favourable location for a
hydropower project, due to its specic
geographic characteristics. The unique
attributes of the catchment combined
with the region’s year round high
consistent rainfall (on average around
eight metres per year) provide river
ows that are well-suited for hydropower
while at the same time maintaining
downstream river characteristics.
The joint venture has reviewed the
existing studies in light of today’s
technical, environmental and social
standards. All ongoing work, including
options assessment and downstream
impacts assessment associated with
the proposed development, is being
undertaken in full collaboration with
the Gulf and PNG governments.
A comprehensive feasibility study
of environmental, sociological and
engineering aspects is expected to
be completed in 2012.
Govts agree to study
hydro project in PNG
From the Editor
Dear readers,
Many of you will no doubt remember that in our special
60th anniversary issue published in May last year, we
compiled a list of the sixty most influential people in
the hydropower and dams industry. The people named
in the list were considered to have helped shape the
course of the global hydro and dams business over the
last six decades and were included as a result of nomi-
nations from contacts and readers around the world.
The team at International Water Power & Dam
Construction were astonished by the amount of interest
generated by the list, we received some great respons-
es both from those people included in the list and other
general readers of the publication, and over the past
few months we have received numerous emails asking
when the next list is due to be published.
As a result, we’ve decided to compile a new listing
along a similar theme, although this time we’ll be
specifically looking for the 20 most influential people in
dam engineering over the last ten years. We wanted to
honour those people who have made a difference to the
industry recently, and include the younger engineers
who are already making their mark, together with the
older generation who are continuously sharing their
experiences and expertise.
This is where we need your help! We need your nomina-
tions to help make the most accurate listing possible.
We want to know the names of the people you think
have helped shape the dam engineering environment
and driven forward the concepts and techniques that
are essential to the sector.
To contribute to this feature, please send an email to
me at: carrieannstocks@globaltrademedia.com, giving
the name(s) of your nominee(s) and briefly describe the
reasons you think they should be included in the list
by 18th November 2010. We will then compile details
of all the nominees and then discuss with a number of
industry experts who they think should be included in
the final 20, with the list to be published in our January
2011 issue.
I look forward to receiving all your emails!
Best wishes
Carrieann Stocks
Editor
Email: carrieannstocks@globaltrademedia.com
On a separate note, on 17 April 2011 our Contributing
Editor, Suzanne Pritchard, is running the London
Marathon in memory of her father to raise funds for
the charity Ataxia UK. If you or your company would
like to offer your support please use the link below.
Thank you for your interest.
http://www.virginmoneygiving.com/suerunsforataxia
India’s hydro capacity to
double by 2017, says report
H
ydro capacity in India is set to
double by 2017, market research
and information analysis company
RNCOS says its latest report.
This increase will be largely due to
the planned start-up of new projects,
following huge investment by the
co u nt ry ’ s go v er nm e nt i n t he
Northeastern region, says the
research report ‘Indian Power Sector
Analysis’. New projects funded by the
government are expected to contribute
14,000MW of electricity by 2017.
The report found that only about
910MW of hydropower has been
commissioned in the private sector,
constituting less than 3% of the total
installed hydropower capacity. It states
that Himachal Pradesh has the largest
capacity in terms of small hydro power
potential followed by Uttaranchal, J&K,
Arunachal Pradesh and Chhattisgarh.
The study has also found that India
currently has huge power requirement
and the supply may not be adequate
over the coming years.
For more details visit: http://www.
rncos.com/Report/IM114.htm.
6 OCTOBER 2010 INTERNATIONAL WATER POWER & DAM CONSTRUCTION
WORLD NEWS
In brief
THE GOVERNMENT OF
Tanzania has signed
a memorandum of
understanding with JSC
Zarubezhstroy – part of
Russia’s Borodino Group
– for the development
of the 222MW Rumakali
hydroelectric project, set
to be the largest hydro
development in the East
African country so far. The
project is to be built over
a three to ve year period
by Borodino and its sub-
sidiaries Stroyecologia,
Baltic-CGEM-Komplekt
and ACC Engineering. New
Russian technologies and
construction practices are
to be implemented on the
project. More than 75% of
the project’s preparatory
phase is already complete.
SSE RENEWABLES,
the renewable energy
division of Scottish and
Southern Energy (SSE),
has been given the green
light by Scottish Ministers
to develop a new 7.5MW
hydroelectric power
station at Kildermorie, near
Ardross, Ross-shire. The
hydro scheme will consist
of a new dam and storage
reservoir at the head of
Gleann Mhuire, a buried
pipeline running down
the glen and a semi-buried
powerhouse with associated
tailrace built next to the
Abhainn na Glasa upstream
of Kildermorie Lodge.
COGENTRIX ENERGY
LLC has announced that
its wholly owned subsidi-
ary Masat Enerji Elektrik
Uretim ve Ticaret Limited
Sirketi (Masat) has
placed all three units at the
23.4MW Yavuz hydroelec-
tric generating plant into
service on the Yesilirmak
River in the Turkish province
of Amasya.
WAPDA appoints design engineer
on Tarbela extension, Pakistan
M
OTT MACDONALD, IN A
joint venture with Coyne et
Bellier, has been appointed
by the Water and Power Development
Authority (WAPDA) of Pakistan as
design engineer for the 4th extension
project at Tarbela Dam.
The project, for which finance
has been arranged by the World
Bank, will extend the power
generation facilities at Tarbela Dam
on the Indus River. The extension
is expected to add about 1000MW
of electrical capacity to the national
power system.
The dam, completed in 1974,
was designed to store water from
the River Indus for irrigation, flood
control and the generation of
hydroelectric power. There is
currently an urgent need to add
capacity to the system as the existing
power generation capacity of Pakistan
is not sufcient to meet the country’s
rising demand for electricity.
The 148m high, 3000m long dam
has two gated spillways with a com-
bined discharge capacity of approxi-
mately 42,000m
3
/sec and five
tunnels that provide irrigation releases
and power generation. The dam forms
a lake with a surface area of 230km
2
,
a current gross storage capacity of
9.8Bm
3
and a live storage capacity
of 8.4Bm3 that can be released for
irrigation and power generation during
the low ow season. At the time of
construction the dam tunnels 1, 2
and 3 were scheduled for power
generation and tunnels 4 and
5 were designed exclusively for
irrigation release.
Mott MacDonald has been appoint-
ed on the development of existing
tunnel 4 which is to be used for power
generation and is likely to add two
units of 480MW each to the scheme.
The company will carry out a detailed
feasibility study to manage the imple-
mentation of the 4th extension so
that it does not affect the irrigation
release and sediment management.
This will also include the modication
of intake structure, the construction
of a power house and the penstock
between the outlet of the tunnel and
the new powerhouse.
The project is due for completion
around 2016 and has an estimated cap-
ital value of approximately US$500M.
Contracts awarded for Minidoka Dam
T
HE US BUREAU OF RECLAMATION
has awarded several supply con-
tracts totalling almost US$2.4M
for equipment needed to repair the
Minidoka Dam spillway and canal
headworks on the Snake River, Idaho.
The largest contract, valued
at US$1.89M, was awarded to
Con-Vey/Keyston Inc for the supply
of 16 radial gates and radial gate
hoists, with the company also win-
ning a $214,600 contract for stop
logs. K & N Electric Motors received a
$115,712 contract for eight cast iron
slide gates, with Airborne Veterans
Service awarded a $99,922 contract
to supply steel pipe. Another $49,70
contract to supply an engine-genera-
tor set was awarded to Millennium
Products Inc.
“Reclamation is purchasing
and storing the equipment before
construction to avoid delays in the
construction sequence which is
critical because most of the work
must be completed during the
non-irrigation season,” said Jerrold
Gregg, Snake River Area Manager.
“The structures must be in-place and
operational for water delivery, hydro-
power, and ood control during and
between construction seasons.”
T h e M i n i d o k a S p i l l w a y
Replacement Project will replace
deteriorating concrete that is over
100 years old and constantly in
need of repairs. The work will also
include the outdated 2237ft long
pier and stop log structure which
is labor intensive to operate. These
repairs will allow USBR to continue
to meet its contractual obligations
for water delivery, power generation,
and compliance with the Endangered
Species Act.
Minidoka Dam was constructed
in 1906 as part of the Minidoka
Project. Minidoka Dam is operated
as one of six storage facilities on
the Snake and Henry’s Fork rivers.
The multi-purpose project provides
irrigation, power production, flood
control, recreation, and fish and
wildlife benets.
The construction contract to repair
the spillway is likely to be awarded in
March 2011.
F
IRST MINISTER ALEX SALMOND
has unveiled plans to allow state-
owned utility Scottish Water to tap
into Scotland’s natural water resourc-
es, helping the country to become the
‘world’s rst hydro economy’.
Putting forward 10 new pieces of
legislation to Parliament the First
Minister set out the Scottish National
Party’s (SNP) ambitions to see
Scotland control its own economy
and benet from natural resources of
water and energy. This includes plans
to allow state owned utility Scottish
Water – the largest consumer of elec-
trical power in the country – to become
a renewable energy generator, utilising
its existing land and pipe network to
build hydropower and wind projects.
“If we give Scottish Water room to
grow, then we have the makings of
a great Scottish company, in public
ownership,” said Salmond. “Scotland
will become the world’s rst hydro-
economy – wisely exploiting our water
to help drive our economy.
“Much as vested interests resisted
the Hydro dams, so there will be those
who resist a new vision for Scottish
Water,” he added. “But Scottish
Water can help transform Scotland’s
prospects today… As [it] expands its
activities it will generate the additional
revenue to become nancially neutral
to the Scottish Government’s books.”
According to national media
reports, the company could generate
over £300M in extra revenues from
renewable power projects.
Scottish National Party outlines plans
for ‘world’s first hydro-economy’
ADVANCING
SUSTAINABLE
HYDROPOWER
14-17 June 2011 - Iguassu, Brazil
WORLD CONGRESS
water
sustainability
climate
investment
energy
WWW.HYDROPOWER.ORG
Main Congress Sponsors:
Media Partner:
Tel: +44 208 652 5290 | Fax: +44 208 643 5600 | Email: congress@hydropower.org | Web: www.hydropower.org
The IHA 2011 World Congress:
Don’t miss this opportunity to attend the hydropower
sector’s most challenging and enriching event of 2011!
Contact IHA today to register your interest in attending.
2010$08$06_IHA_Congress_Advert_1_Final.indd:::1 06/08/2010:::10:01:23
Let IWP&DC’s readers know about your forthcoming conferences and events.
For publication in a future issue, send your diary dates to: Carrieann Stocks, IWP&DC, Global Trade Media Ltd, Progressive House, 2 Maidstone Road,
Foots Cray, Sidcup, Kent, DA14 5HZ, UK. Alternatively, email: carrieannstocks@globaltrademedia.com, or fax:+44 208 269 7804
DIARY OF EVENTS
8 OCTOBER 2010 INTERNATIONAL WATER POWER & DAM CONSTRUCTION
DIARY
November
1-3 November
Gidrostroy 2010 (Exhibition of
Facilities and Technologies of the
Hydro Construction Industry)
Moscow, Russia
CONTACT: Olga L Antonova,
Project Manager, Mir-Expo, Yury
Andropov`s Avenue 22, 115533
Moscow, Russia.
Tel: +7 499 618 0565
Fax: +7 499 618 0565
Email: build@mirexpo.ru.
www.mirexpo.ru/eng/exhibitions/
gidrostroy10.shtml
2-3 November
Forum on Hydropower 2010
Ontario, Canada
CONTACT: Canadian Hydropower
Association.
Tel: +1 613 751 6655.
Email: info@can-hydropower.org.
www.can-hydropower.org.
2-4 November
Renewable Energy World Asia
Singapore
CONTACT: Amy Nash, Conference
Manager, PennWell Publishing UK,
Warlies Park House, Horseshoe Hill,
Upshire, Essex EN9 3SR, UK.
Tel: +44 1992 656621.
Fax: +44 1992656735.
Email: amyn@pennwell.com.
www.renewableenergyworld-asia.
com.
2-5 November
Hydro 2010
Rostock-Warnemunde, Germany
CONTACT: DHyG, c/o Sabine
Muller, Schutower Ringstr 4,
D-18069 Rostock, Germany.
Email: info@hydro2010.com.
16-17 November
Flood Management 2010
London, UK
CONTACT: Flood Management
Conference Registration,
Emap Networks, First Floor,
Greater London House,
Hampstead Road, London,
NW1 7EJ.
Tel: +44 0845 056 8069.
Fax: +44 20 7728 5299.
constructconferences@emap.com.
www.nceoodmanagement.com
23-24 November
4th International Tidal Energy
Summit & Awards Ceremony
London, UK
CONTACT: Tidal Today, 7-9
Fashion Street, London, UK E1
6PX
Tel: +44 20 7375 7575.
Fax: +44 20 7375 7576.
Email: register@tidaltoday.com.
http://www.tidaltoday.com
24-26 November
16th International Conference on
Hydropower Plants
Vienna, Austria
CONTACT: Dr. Eduard Doujak,
Institute for Waterpower and
Pumps, Karlsplatz 13/305, Vienna
Austria, A-1040.
eduard.doujak@tuwien.ac.at.
www.viennahydro.com.
25-27 November
RENEXPO Austria
Salzburg, Austria
CONTACT: REECO Austria
Gmbh, Josef-Schwer-Gasse 9, A -
5020 Salzburg, Austria.
Tel: +43 (0) 662 8226 - 3.
www.renexpo-austria.at
26-28 November
Workshop on Optimization of
Construction Method for CFRDs
Yichang, China
CONTACT: HydrOu China, No.
41-210 Three Gorges Community,
Zhenping Road, Yichang city, Hubei
443002, China
Tel: +86717 672-1379
Fax: +86717 672-1379
Email: mail.chenqian@gmail.com
http://www.hydrou.com/index.
php?option=com_content&task=vi
ew&id=166&Itemid=1.
29 November - 1 December
World Infrastructure Summit
Barcelona, Spain
CONTACT: EMAP Networks.
Tel: +44 (0)207 554 5816.
Email: wis@emap.com.
www.worldinfrasummit.com.
December
6-7 December
Small Hydropower USA 2010
Washington DC, US
CONTACT: G r een P owe r
Conferences, London, UK.
Tel: +44 20 7099 0600.
Email: info@greenpowerconfer-
ences.com.
www.greenpowerconferences.com
14-16 December
Power-Gen International
Orlando, Florida, US
CONTACT: Jan Simpson, Power-
Gen International, UK.
Tel: +1 918 831 9736.
Fax: +1 918 831 9875.
pgiconference@pennwell.com.
www.power-gen.com.
January 2011
18-21 January
World Future Energy Summit
Abu Dhabi, United Arab Emirates
CONTACT: Reed Exhibitions FZ
LLC, PO Box 60799, Abu Dhabi,
United Arab Emirates.
Tel: +9712 444 6113.
Fax: +9712 444 3768.
Email: ara.fernezian@reedexpo.ae.
www.worldfutureenergysummit.
com.
February 2011
15-17 February
6th International Conference on
Dam Engineering
Lisbon, Portugal
CONTACT: Eliane Portela , LNEC,
Concrete Dams Department,
LNEC, Av. Brasil 101, 1700-066,
Lisbon, Portugal.
Tel: (351) 218443361.
Fax: (351) 218443026.
Email: eliane@lnec.pt.
http://dam11.lnec.pt.
22-24 February
Underwater Intervention 2011
New Orleans, LA, US
C O N T A C T : U n d e r w a t e r
Intervention 2011 Committee ,
5206 FM 1960 West, Suite 202
Houston, TX 77069 USA.
Tel: +1 281-893-8539.
Fax +1 281-893-511.
Email: rroberts@adc-int.org.
www.underwaterintervention.com.
March 2011
8-9 March
PTK 2011: Norwegian Power
Production Conference
Oslo, Norway
CONTACT: Energy Norway, PO
Box 7184 Majorstuen, N-0307
Oslo, Norway.
Tel: +47 23 08 8900.
Email: ptk@energinorge.no.
15-16 March
Case Studies Workshop: Learning
from International Dam Incidents
and Failures
Las Vegas, Nevada, US
CONTACT: CEATI International,
1010 Sherbrooke St W, Suite 2500,
Montreal, QC, Canada, H3A 2R7.
Email: workshops@ceati.com.
www.ceati.com/Meetings/DS2011/
index.html.
28-30 March
HydroVision Russia
Moscow, Russia
CONTACT: Mathilde Sueur,
Conference Manager, PennWell.
Tel: +44 1992 656 634.
Fax: +44 1992 656 735.
E: mathildes@pennwell.com.
www.hydrovision-russia.com.
April 2011
11-15 April
United States Society on Dams
20 1 1 Ann u a l M e e t i n g an d
Conference
San Diego, California, US
CONTACT: United States Society
on Dams, 1616 Seventeenth Street
#483, Denver CO 80202, US
Tel: +1 303-628-5430.
Fax: +1 303-628-5431.
15-17 April
Energy Efciency and Renewable
Energy Sources for South-East
Let IWP&DC’s readers know about your forthcoming conferences and events.
For publication in a future issue, send your diary dates to: Carrieann Stocks, IWP&DC, Global Trade Media Ltd, Progressive House, 2 Maidstone Road,
Foots Cray, Sidcup, Kent, DA14 5HZ, UK. Alternatively, email: carrieannstocks@globaltrademedia.com, or fax:+44 208 269 7804
DIARY OF EVENTS
WWW.WATERPOWERMAGAZINE.COM OCTOBER 2010 9
DIARY
Europe
Soa, Bulgaria
CONTACT: Via Expo Ltd, 3
Chehov Square, Plovdiv 4003,
Bulgaria.
Fax: +359 32 945 459.
Email: ofce@viaexpo.com.
http://viaexpo.com.
May 2011
16-20 May
2 5 t h E u r o p e a n R e g i o n a l
Conference of ICID
Groningen, The Netherlands
CONTACT: Bert Toussaint, Chairman
of the Organizing Committee, Ministry
of Transport, Public Works & Water
Management, Rijkswaterstaat Centre
for Corporate Services, PO Box 2232,
NL-3500 GE Utrecht, Netherlands
Tel: +31 62 079 1372
Email: bert.toussaint@rws.nl.
www.nethcid.nl.
23-26 May
Hidroenergia
Wroclaw, Poland
CONTACT: European Small
Hydropower Association (ESHA).
Tel: +32 2 546 1945 .
Fax: +32 2 546 1947.
Email: info@esha.be
www.esha.be.
29 May - 3 June
79th Annual Meeting of ICOLD
Lucerne, Switzerland
CONTACT: Swiss Committee
on Dams, c/o Stucky Consulting
Engineers.
Email: swissdams@stucky.ch
http://www.swissdams.ch
June 2011
7-9 June
Power-Gen Europe 2011
Milan, Italy
CONTACT: PennWell Publishing UK
Ltd, Warlies Park House, Horseshoe
Hill, Upshire, Essex, EN9 3SR, UK.
www.powergeneurope.com.
14-17 June
IHA’s 2011 World Congress
Iguassu Falls, Brazil
C O N T A C T : I n t e r n a t i o n a l
Hydropower Association.
Tel: +44 20 8652 5290.
Email: congress@hydropower.org.
September 2011
5-7 September
3rd Australasian Hydro Power
Conference
Queenstown, New Zealand
CONTACT: John Schurink.
Tel: +64 3 3646607.
Email: schurinkj@mace-eng.co.nz.
www.hydroconference.co.nz.
25-29 September
Dam Safety 2011
Washington DC, US
CONTACT: Association of State
Dam Safety Ofcials.
info@damsafety.org.
www.damsafety.org.
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Log jam at flood control dam in Pennsylvania (USA)
NEW TECHNOLOGY
Taking care of turbines
A new technology developed by Brazilian company CARE Electric utilises river ows and
allows for installation in practically any location, regardless of river width, depth and current
A
USTRIAN inventor Johann Hoffman has combined
forces with Brazilian company CARE Electric to design
a turbine system to capture energy from the natural ow
of rivers; eliminating the need for dams, reservoirs and
ooding of land. In acknowledgement of their work, CARE was
one of 26 companies to be named as 2010 Tech Pioneers by the
World Economic Forum.
The modular designed concept involves suspending turbines across
the river and it is possible to place units successively downstream. The
only real restriction or guideline is that each unit must be placed at a
sufcient distance from the proceeding unit, allowing the river which
was highly oxygenated by the turbine blades, to return to its natural
state. Models can be designed to be adapted according to the size and
ow of a river. The generating capacity is directly dependent on the
volume of water ow and river conditions. The volume of energy to
be installed is currently a multiple of 167kWh which is the installed
capacity of the slow speed rotation generator available. Larger capac-
ity generators are being developed.
INSTALLATION
In order to initiate installation, reinforced concrete is placed in the
riverbed to support the structure. Partial blockage of the riverbed is
required which is then eliminated as the installation is assembled.
Integral parts of the system are the supports placed on the river-
banks or, in wider rivers, also placed in the river. Hydraulic cylinders
are xed to these supports and serve to raise, lower and adjust the
turbine position in relation to the height of the water. This hydraulic
lifting system permits raising the turbines out of the water, totally
liberating river ow in the event that there is an excess of water, when
the height should be adjusted or when it is necessary to inspect the
units, or perform preventive or corrective procedures.
The height of the riverbanks should be at least 1m above water
level. The reason is that if ooding occurs the turbines can be totally or
partially lifted out of the current ow avoiding excess pressure on the
unit. If the riverbank is higher than what is recommended, larger units
can be installed to increase the volume of power generated. As the
water level rises or falls the turbines are automatically adjusted to the
condition, which avoids ooding and adjusts pressure on the system.
When the turbines are in the operating position they rest on the
concrete structure that is placed transversal to the riverbed. The posi-
tioning (lowering of the turbine) causes a temporary reduction in the
area of the river ow and consequently the water level is backed up
until it reaches the height of the submerged turbines. When it over-
ows it continues on its natural course.
The height of the water is regulated by steel plates which permit the
control or adjustment of the speed of the turbine rotor as well as the
control of the potential power force. This column of water added to
the hydraulic potential and the river ow creates a hydraulic force on
the blades when the steel port (door) is opened. The basic function
of the ports or doors is to regulate the opening, and consequently the
volume of water ow, which can be increased or decreased according
to generating requirements.
The volume of water that passes through the port (opening) is
determined by the project design. It increases in velocity at a rate
proportional to the height of the water column. This volume creates a
perpendicular hydraulic force or pressure on the surface of the blades
attached to the axel of the rotor of the turbine, thereby creating the
spinning motion of the rotor.
ADVANTAGES
One of the most noteworthy points about the system is that by using
50% of the hydraulic energy contained in the river ow, the CARE
system generates at a minimum of 90% of installed capacity. Other
advantages are:
r T he module nature of the turbine system means it is relatively fast
and easy to build, especially in remote places where there is no
distribution network. In areas like Africa, India, many countries in
the Far East, Central and South America it offers signicant advan-
tages for quickly improving social conditions, health and education.
Other markets include irrigation and mining operations.
r T he normal ow of material contained in any river bed or current
does not constitute a problem since the blades attached to the rotor
are exible allowing the passage of any material.
r T he system is totally automatic; no staff are required since sensors
control water ow, speed of rotation, water height etc. Cameras
provide long distance monitoring via the internet.
r U nits can be installed close to the source of consumption therefore
the costs of a distribution net is negligible or not a consideration.
r All units provide sh runs.
r Canals can be installed in locations where there may be river trafc.
r Detailed planning associated with hydroelectric dams is not neces-
sary and various installations may be conducted simultaneously.
FUTURE PLANS
Generating units can be installed in any river which provides the min-
imum conditions necessary to rotate the generators. In cases where ice
is a consideration it may be necessary to install heating solutions.
The technology is in its initial phase; however larger units of 5MW are
being developed. Recognition by the World Economic Forum is seen as
international conrmation of the validity of the technology due to the repu-
tation of forum and the rigorous evaluation process it adopts.
The authors are Eng. Wilson Pierazoli and Frank de
Luca. Email: frank@careelectric.com.br or visit www.
careelectric.com.br for more details.
10 OCTOBER 2010 INTERNATIONAL WATER POWER & DAM CONSTRUCTION
Simulation of operating conditions
IWP& DC