National Institute of Ocean Technology has set up a demonstative 150 KW tidal power plant in Trivandrum in Kerala. The institute has also set up a wave energy project of 75 KW
Tidal Power can be harnessed two ways ? one as through utilizing movement of waves through tidal stream turbine and another through tidal rise by storing water in tidal barrages in ocean which occur daily along the coast. Of this tidal barrage based power generation has been successful in the world. Apart from these two, there are other forms of ocean energy which includes utilizing ocean currents, absorbing subtle movement of waves by buoyant moored devices. Many other technologies are under experimentation across the globe with very few achieving commercial scale of power generation.
Across the globe, Shiwa Lake Tidal plant of South Korea and La Rance Tidal power plant of France are larger ones with generation capacity of 250 MW. Of this French tidal power plant is in opera
Hann-Ocean Energy, a Singapore based company has been making research into tidal energy for over a decade. It has recently unveiled Drakoo device product improvements conducted over the period of 11 months managed at World Future Energy Summit 2017. The peak power output performance of its device improved from 1kW to 9.3kW - at Hann - Ocean?s Chinese testing facility. The working principle of Drakoo, being a twin-chamber oscillating water column system, is to transform waves into a continuous water flow which drives a hydro turbine generator. Current technologies are not cost effective when compared to other green energy options like wind and solar.
Indian government has conducted a study through the Indian Institute of Technology, Chennai, in association with CRISIL (Credit Rating Information Services of India Limited) Risk and Infrastructure Solutions Limited on tidal power potential in India. According to them, there is an estimated potential of about 8000 MW of tidal energy, with 7000 MW in the Gulf of Kambhat, 1200 MW in the Gulf of Kutch in Gujarat, and about 100 MW in the Gangetic delta in Sunderbans in West Bengal. Currently, tidal energy cannot be presently harnessed on commercial basis due to high capital cost ranging from Rs. 30 crores to 60 crores per MW.