Feasibility study of CETO wave energy converter in Iranian coastal areas to meet electrical demands (a case study)

Abstract

Using wave energy to supply the electrical demand of the coastal population is an exciting idea. In recent years, many wave energy converters (WEC) have been invented, researched, and used in different parts of the world. These WECs can be used alone or in a hybrid system with other renewable resources. Also, they can be used stand-alone or grid-connected to generate electricity. Iran has access to the sea from the north and south. Using wave energy to provide power can be a good solution for energy production. This study investigates the application of a point absorber WEC named CETO to supply electricity for a 300 population on the Coasts of the Caspian Sea, Persian Gulf, and Oman sea. Waves scatter diagram for three locations calculated based on the data collected by the Iranian National Center of Ocean Data. According to these diagrams, the average wave height and period on the Konarak coast in the Oman Sea were 69 cm and 5.4 s, respectively, and Konarak had the best wave condition between the desired location in terms of wave energy potential. Also, the Cost of Energy (COE) and Net Present Cost (NPC) for three areas calculated, and the lowest amount of COE and NPC occurred in Konarak. The COE range at Konarak was between 0.523 and 0.991 $/kWh for different WEC numbers. The best performance in terms of power generation and emissions reduction also occurred in Konarak; and the output power of each CETO unit was 23.01 kW, and emissions and related penalties reduced by about 24 %. Also, the effect of load change and grid extension cost on financial results sensitively analyzed, and the results presented. The obtained financial results compared with the results of some similar WECs and it was found that the obtained results differed very little from the results of other research, and were within their range.