Dans Energy Pvt. Ltd. , an independent power producer signed an MOU with the Sikkim Government on 5th Dec 05 for the implementation of the 96 MW Jorethang Loop Hydro-Electric Project (JLHEP) on a Build, Own, Operate and Transfer (BOOT) basis. The operational period extends for 35 years from commercial operation date of the project. Dans Energy Pvt. Ltd is promoted by the DANS Group and is a special purpose vehicle for the implementation of JLHEP. Seeing the vast potential present in the hydro power generation sector, the group ventured into private power generation on BOOT basis in 2005.
Jorethang Loop HEP received registration under Kyoto Protocol’s ‘Clean Development Mechanism’ of the United Nations Framework Convention on Climate Change on 28th Feb 2008 (http://cdm.unfccc.int/Projects/DB/DNV-CUK1188881385.79/view). In doing so, JLHEP received registration for 465,961 carbon credits, the second largest hydro power project in India and the fourth largest hydro power project in the world registered under the CDM.
The Jorethang Loop Hydroelectric Power Project, a Run-of-River hydro-electric project is the terminal project in the cascade development of five projects (the upstream four projects conceived by CWC are the Rangit Stages I to IV) planned on the Rangit River in Sikkim, which is a tributary of the Teesta River (the main river of the State of Sikkim). It is located in South / West District of Sikkim about 5 km upstream of Jorethang town. The closest airport is at Bagdogra which is 96 km from Jorethang and the nearest railhead is at Jalpaiguri, at a distance of 94km from Jorethang. The project sites are well connected by all weather SPWD road from Melli and Melli is connected by NH - 31 A with Siliguri/ New Jalpaiguri/ Bagdogra.
The Project envisages a Barrage with Silt Excluder arrangement on the main Rangit river near the village Pipley, a Power Intake on the left bank to divert the flows into a 6.8 km long Head Race Tunnel along the chord of the Jorethang Loop to create a gross head of about 86 m, Surge Shaft of 25 m diameter, Pressure Shaft, a surface Powerhouse at the confluence of the Rangit river with Bhari Khola with installation of 96 MW (two units of 48 MW capacity each), about 30 m length of Tailrace, an outdoor 220 KV Switchyard just above the Powerhouse, and 220 KV Single Circuit Transmission line of 14 km length to evacuate the power to the grid station at Melli. The Net head of the scheme is 74 m and the design discharge is 140 cumec. However, during the monsoon months when the discharge is substantially higher than the design discharge, the turbines will be run under 15% overload capacity drawing a discharge of 165 cumecs. Based on these parameters the plant will have an installed capacity of 96 MW and a total average annual energy generation (50 % dependable Year) of around 535 GWh (Million Units).