Feasibility study of offshore wind energy on the coast of Sri Lanka

Abstract

ABSTRACT Sri Lanka's energy issue is caused by underinvestment in renewable energy, resulting in rationing and power outages. Given its power output, offshore wind energy is a possible solution for a sustainable energy future. This study investigates the viability of an offshore wind farm by scrutinizing three potential sites, chosen based on wind speed, direction, and allied variables. Wind speed data from the ERA-5 repository and bathymetry information from the General Bathymetry Chart of Oceans support energy potential assessment for these locations. Employing the WAsP software, a technical analysis was performed to determine the energy output potential for water depths up to 50 m. Of the three sites, the western site emerged as the most productive, estimating an energy yield of 24.36 GWh from an 8 MW turbine. This calculation took into account a capacity utilization factor of 34.76%, with the levelized cost of energy approximating INR 7.70. The northern and southern sites trailed marginally, with estimated energy outputs of 20.31 GWh and 22.36 GWh, respectively. As evidenced by these findings, offshore wind energy holds promise as a dependable and steadfast energy source for Sri Lanka. It also highlights Sri Lanka's first offshore wind farm and future plans.