Technical and Economic Assessment of a 10 MW Wind Farm at Pakphanang District in Nakhon Si Thammarat Province

摘要

This paper presents the technical and economic assessment of a 10 MW wind farm at Pakphanang district in Nakhon Si Thammarat province, southern Thailand. The microscale wind resource map within 10 km is developed based on 3 years recorded wind data at 120 m agl (2012-2014) along with computational fluid dynamic (CFD) wind flow modeling with resolution of 90 m. The 5×2.0 MW and 4×2.5 MW wind farm are parked along the shoreline with parking criteria 5 times rotor diameter. The net annual energy production (AEP) and capacity factor (CF) with wake losses are analyzed. Economic analysis is done based on the current project cost and financial incentive (Adder). Results show that the annual mean speed at 120 m agl is 5.2 m/s. The net AEP and CF are 36.60 GWh/year and 41.78% respectively with wake loss of 0.40%. Under project cost of 75 million THB/MW and 70% debt ratio and BOI tax exemption promotion, the benefit cost ratio is 1.04, the net present value is 65.96 million THB, the financial internal rate of return is 17.70% and the payback period is 4 years. Finally, a 10 MW wind power project could avoid greenhouse gas emission of 19,764 ton CO_2eq.