Local News Nepal
April 2021: HPP Upper Tamakoshi, Nepal - Successful pressure test of penstock
In February 2021, the pressure test of the lower horizontal penstock for the Upper Tamakoshi hydropower plant in Nepal was successfully completed to the utmost satisfaction of the customer.
A penstock portion of 377 m length along with six bifurcators and branch pipes was subjected to 115.1 bar for 30 minutes with water volume of 1.4 million cubic meters. The complete test was conducted over a period of 10 hours. It is worthwhile to mention that the entire lower vertical and horizontal penstock was 100% weld repaired on-site and the bifurcators were repaired, modified, and aligned also on-site.
The penstock of Upper Tamakoshi HEP is designed for a water pressure of 905 meters, the diameter is varying from 1.47 meters to 3.6 meters with two vertical and two horizontal shafts. The upper vertical shaft has a depth of 310 meters and the lower vertical shall has a depth of 370 meters.
After the successful supply, installation and dry commissioning of the entire electro-mechanical equipment for the Upper Tamakoshi hydropower plant, ANDRITZ also received the contract to take over the refurbishment and commissioning of the gantry crane, 100% weld replacement of already supplied pipes by another contractor and installation of lower vertical and horizontal penstock.
The work was very challenging considering the quality issues of the preliminary delivered equipment and the difficult site conditions. However, the on-site team from ANDRITZ Hydro did an excellent job to not only execute this additional order in time and with top-tier quality, but also to strengthen the confidence of the client in the work of ANDRITZ.
This order once again underlines ANDRITZ' strong market position in Nepal as one of the leading suppliers of equipment and services to the HYDRO industry as well as highlighting the company's expertise in project execution and project management.
Upper Tamakoshi is the largest hydropower plant in Nepal with an underground powerhouse. It has a total capacity of 456 MW to meet the country’s growing power demand.
Total output: 456 MW
Penstock length: 760 meters.
Penstock diameter: 1.47 to 3.6 meters
January 2021: HPP Sanjen Khola, Nepal - Contract for supply of Pelton units in Nepal
ANDRITZ has received an order for the Sanjen Khola hydropower plant, located in Bagmati District Rasuwa City, North of Katmandu, North Central of Nepal on Dec. 18th, 2020 in Zhengzhou, China. The scope includes the supply of three 26 MW Pelton turbines and governors. Currently, Sanjen Khola is the second hydropower constructed by our client in Nepal.
Under the context of the Belt and Road Initiative, the project was facilitated by the new bilateral partnership between Nepal and China. This project is part of the China–Nepal Economic Corridor's, Road and Belt program. The EPC contract was signed between China Harbour Engineering Company Limited (CHEC) and Sinohydro Bureau No.11(SH. No.11) already in 2018. ANDRITZ has now signed the contract for the supply of three 26 MW Pelton turbines and governors, operating with a water head of 952 m. Commissioning and start of commercial operation is scheduled for July 2023.
The order is an important further step to intensify our cooperation with Sinohydro and to consolidate our market leadership in Pelton turbine technology.
The project is developed by CHEC with BOOT mode in four years’ construction duration and thirty years’ operation cycle. The hydropower plant will be developed as a run-of-river power station with a normal water storage level of 3,391 m and a total installed capacity of 78 MW. Average annual electricity production is 412.7 GWh. After completion, Sanjen Khola will greatly address the long-standing issue of power shortage and improve the living standard of people in Nepal.
ANDRITZ has supplied more than 1,300 Pelton turbines with a total capacity of approx. 65,000 MW worldwide. Award of this contract is further proof of ANDRITZ’s leading position for Pelton technology in the important region of Asia.
Total output: 78 MW
Scope output: 3 x 26 MW
Head: 952 m
Speed: 750 rpm
Runner diameter: 1,710 mm