Pollupalai and Vallimunai Wind Farms

The Pollupalai and Vallimunai Wind Farms are two wind farms built together by Joule Power and Beta Power, on the north-eastern shore of the Jaffna Lagoon, in Pachchilaipalli, Sri Lanka. Both wind farms are owned by the parent company WindForce, and have an installed capacity of 12 megawatts each, and an annual production of approximately 60 GWh. The wind farms are the first-ever to be constructed in the Northern Province of Sri Lanka.

Wind turbines
Both wind farms utilizes a total of sixteen ReGen V82 wind turbines, which has an installed capacity of 1.5 MW per turbine. The turbines operate at 9–17.3 RPM, and has a rotor diameter of 82 m and a swept area of 5325 m2. The tubular tower section has a hub height of 85 m, and is made up of four sections.

The wind turbine's operating wind speed is 12.5 m/s, with cut-in and cut-out wind speeds of 3 m/s and 22 m/s respectively. The turbines can survive wind speeds of up to 52.5 m/s. All 16 turbines are placed 400 m apart in a single row, facing the lagoon. The site's average wind speed is 7.5 m/s, with an air density of 1.18 kg/m3.