Small Hydro

CPFL repowers six plants,plans to sell carbon credits

Brazil utility CPFL Energia plans to sell carbon emissions credits from the repowering of six small hydroelectric projects in Sao Paulo State. Repowering consists of replacing original equipment installed between 1910 and 1930, when generation efficiency was about 65 percent. CPFL said new turbine-generators would increase efficiencies more than 80 percent with no changes in water use.

The result of the increased power is an offset of 31,190 metric tons of carbon emissions a year. In August 2007, the United Nations’ Clean Development Mechanism agency approved an application by CPFL to sell emissions credits.

When the repowering is complete, total capacity of the six plants will increase to 35.6 mw from 25.6 mw and generation will increase by 866 gigawatt-hours annually.

Projects, new capacities, and rivers are:

Kenya utility invests inupgrading 14.4-mw Tana

Kenya Electricity Generating Co. Ltd. (KenGen) says it will spend US$40 million to upgrade a 14.4-mw hydropower plant to meet rising demand for power in the east African nation.

KenGen said it would increase capacity at the Tana hydroelectric project to 20 mw with installation of four new generators in a new powerhouse.

Farab International of Iran will do the upgrade work. Construction is to be completed in June 2009.

KenGen, which produces about 80 percent of Kenya’s power capacity of 1,060 mw, said the upgrade would benefit from the United Nations-backed Clean Development Mechanism.

Velcan Energy develops14.7-mw Rodeio Bonito

Work continues on the 14.7-mw Rodeio Bonito hydroelectric project in Brazil’s Santa Catarina State, being built by France-based developer Velcan Energy.

Velcan signed a 30-year concession to build Rodeio Bonito. Site work began August 20, 2007. Commercial operation is expected in the first quarter of 2009, one quarter earlier than once scheduled, the company said.

Velcan said net income from the project is expected to range from 1.7 million euros (US$2.3 million) in 2009 to 2.4 million euros (US$3.3 million) in 2012. Part of that income is to come from sale of 36,000 tons of carbon emissions reductions per year.

Funds approved forUganda’s 6.5-mw Ishasha

The board of the World Bank’s In-ternational Finance Corp. (IFC) approved a US$4 million loan for Uganda’s 6.5-mw Ishasha River hydroelectric project and the leveraging of another US$4 million investment in the project.

The project includes a small reservoir and power plant on the Ishasha River outside Uganda’s Bwindi Impenetrable Forest National Park. It features a 1,140-meter penstock, a powerhouse with a head of 90 meters, and a 10-kilometer transmission line to Uganda’s main transmission grid.

The investment provides a ten-year US$4 million loan for the total US$12 million project.

IFC also introduced project sponsor Eco Power Ltd. of Sri Lanka to another development financial institution that is to lend an equal amount on similar terms.

The run-of-river project is to be built in Kanungu District; it will take about two years to build. It is expected to produce power for 12 US cents per kilowatt-hour (kwh), falling to 9 US cents/kwh after 2014. That compares to 20 US cents/kwh for thermal generation. It also is to avoid production of 22,100 tons of carbon dioxide per year.

Ishasha is being developed under Uganda’s Energy for Rural Transformation program.

Austrian, German firmsto equip 7-mw Lernbo

Swedish generator Vasterbergslagens Kraft AB (VB Kraft) named a consortium of Kossler of Austria and Lloyd Dynamowerke of Germany to supply turbine-generator equipment for refurbishment of the 7-mw Lernbo hydroelectric project near Ludvika.

Under a US$6 million contract, the firms are to supply two 3.5-mw Kaplan turbines with direct-coupled synchronous generators of 428 revolutions per minute and 10.5 kilovolts. The equipment is to be designed to enable local “islanding” during rare regional grid outages.

VB Kraft said it would invest US$13 million in the 1899 station to replace equipment from 1912 and 1944, install new systems for control and machine cooling, and perform necessary civil work. Construction is to begin in March 2009, with recommissioning in October 2009.

Lernbo is to produce 28 gigawatt-hours (gwh) annually due to enhanced efficiency, compared to previous generation of 23 gwh. The refurbished plant is to receive “green certificates” for 15 years of production that will help pay for the investment.

The new equipment is to have environmentally friendly features, VB Kraft said. Additionally, reservoir levels and discharge will remain the same as stipulated in its previous permit. Lernbo will be run in peaking mode to meet demand.

Kossler and Lloyd Dynamowerke previously received a contract to supply a Kaplan unit to the 3.7-mw Ludvika project.

Briefly …

Angola’s Ministry of Energy and Water Affairs is preparing pre-feasibility studies for 1.2-mw Kaquima and 2.7-mw Chafinda. Funding comes from a technical assistance grant of US$626,850 approved by the U.S. Trade and Development Agency … A consortium of ICF Consulting Ltd. of the United Kingdom, COWI A/S of Denmark, and Institute of Global Problems of Energy Efficiency and Ecology of Russia is helping the Russian government develop a policy and plan for increased use of renewable energy sources … A program, funded by the German government, is implementing and monitoring a renewable energy and energy efficiency program for Southeast Europe that includes small hydropower. Germany’s Kreditanstalt fur Wiederaufbau is administrator; consultants are Frankfurt School of Finance and Management and the consortium of DECON GmbH/ EUtech Energie und Management GmbH, both of Germany. The first phase includes a loan facility to Serbia, providing 8.5 million euros (US$11.75 million) for investments and 1.5 million euros (US$2 million) for technical assistance.

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