Vol-4 Issue-6 2018 IJARIIE-ISSN(O)-2395-4396 9259 www.ijariie.com 61 Studies on Wave and Tidal Power Extraction Devices K.A.Khan 1 and Salman Rahman Rasel 2 1 Department of Physics, Jagannath University, Dhaka-1100, Bangladesh E-mail: kakhan01@yahoo.com , Phone Number: +8801911357447 and 2 Local Government Engineering Department (LGED), Fulbaria, Mymensing, Bangladesh E-mail: salman_rasel80@yahoo.com,Phone Number: +8801731722377 Abstract Electric power from wave and tidal power is a form of pollution free and echo-friendly renewable energy which has a huge potential. This potential has not been realized high capital costs and environmental concerns. This paper discussed how the two problems could be resolved utilizing small scale technologies, innovative financing, and involving local communities of the coastal areas to ensure that all key impacts are manageable. Bangladesh has 710 km long coast line and long coastal area with 2~8 m tidal head/height rise and fall, most of which is protected against flooding by embankment and sluice gates. Therefore, the potential for wave and tidal power in the country is significant because the barrages necessary for creating controlled flow through turbines (to tap tidal power) are also needed for flood control. The wave climate has been studied for a long time at the coastal belt of Bangladesh. It has been shown that it is feasible to generate electricity using the Bay of Bengal. Our research study showed that all twelve months of the whole year are not feasible for wave and tidal power production but 8 months of the year (from the late March to October) are most suitable, feasible and viable for power production Keywords: Harness, Converter, Tidal power, wave power. I. Introduction Wave energy devices can be fixed or floating and capture energy from the oscillation of waves at the surface or movement of the water column. Fig.1 below shows the areas with greatest wave power potential in the Celtic Seas and beyond, with potential at it’s greatest to the north and west of Scotland and the west of Ireland. Table 1 lists current activities related to wave energy generation within the SIMCelt project area. Fig. 1: Wave Resource Distribution in Europe (Source: Aquaret.com) Tidal current devices (turbines) are installed where there are strong ocean currents that can be used to generate energy from the fast moving waters. Tidal turbine rotors can be much smaller than wind turbine rotors, thus they can be deployed much closer together (Marine Current Turbines, 2017), however at low tidal depths close to shore generation capacity may be limited. Figure 2 shows the areas with greatest tidal stream potential in the Celtic Seas and beyond, with potential at its greatest to the west of Brittany, Gulf of St Malo,Cornwall,the Severn Estuary, Pembrokeshire coast, Anglesey, between Northern Ireland and south west Scotland and the Inner Hebrides. Table 2 lists current activities related to tidal stream energy generation within the SIMCelt project area.