boiling

They have been promising us for decades that the ocean would be the battery of the future. The difference now is that someone has finally plugged in the cable. The British company Global OTEC has installed in the waters of the Canary Islands the world’s first floating platform capable of extracting energy directly from the heat of the sea. It is not a concept. It is not a simulation. It is there, in the Atlantic, working. The end of intermittency. Unlike wind or solar energy, which are dependent on weather conditions, the ocean offers a constant and reliable source 24 hours a day. It’s what experts call “base load power.” Until now, Ocean Thermal Energy Conversion (OTEC) technology had been tested in terrestrial environments. Until now, the main obstacle to bringing this technology to a full scale was infrastructure. The terrestrial prototypes needed huge pipes to pump cold water from the depths to the coast: kilometers of installation, exorbitant costs. For this reason, Global OTEC’s commitment has been to move the platform directly to the sea, eliminating that route. The result: 80% less pipe. And a model that, for the first time, seems truly scalable. A closed circuit that “recycles” the liquid. The system literally takes advantage of the temperature difference that exists between the surface of the sea and its dark depths. The mechanism is an extremely ingenious closed circuit: Evaporation: The warm water on the surface heats a special liquid that, due to its chemical characteristics, boils quickly. Generation: When boiling, this liquid is transformed into steam, which pushes a turbine that, when rotating, generates electricity. Cycle recycling: For the system to never stop, the vapor needs to return to its liquid state. This is where the newly installed deep pipeline comes into play, sucking in very cold water from the deep sea to cool the vapor and restart the cycle. In addition to generating energy completely free of carbon emissions, the installation takes up little space and is silent. It even offers an invaluable additional benefit to island ecosystems: freshwater desalination. An ecological lifesaver. The project was not born thinking about feeding large continental electrical networks. Its objective is more concrete and, in some ways, more urgent. The European consortium PLOTEC, which finances this development, is targeting Small Island Developing States, the so-called SIDS. These are regions that today depend on polluting and expensive diesel generators, and that also fit squarely in the hurricane belt. That is why the platform has been specifically designed to withstand extreme tropical storms. The Canary Islands, the great laboratory of Europe. That this world milestone has occurred in Spain is no coincidence. The platform has been installed on the Canary Islands Ocean Platform (PLOCAN). As explained by Ministry of Science, Innovation and Universitiesit is an infrastructure managed by a consortium financed in equal parts by the State and the Government of the Canary Islands. This enclave has become a true focus of international technological attraction. According to a statement from PLOCANits waters not only host thermal projects, but at the end of 2026 they will also host the European WHEEL project, led by the Spanish engineering company ESTEYCO. This floating offshore wind energy demonstrator reinforces the role of the Canary Islands as a strategic enclave and positions the region as one of the main European poles for the development and validation of technologies. offshore. Next stop: the commercial jump. With the ocean platform already installed and technical validation underway in the Atlantic, the horizon for this technology seems clear. “This is the moment when OTEC technology moves away from controlled environments and into the real world,” says Dan Grech, founder and CEO of Global OTEC. Its next objective is to install the first commercial energy module in Hawaii, an island market with all the conditions that this technology needs. The company estimates that there are more than 25 GW of diesel capacity on tropical islands that could be candidates for this transition. Although it is important not to lose sight of the fact that going from prototype to commercial scale has historically been the valley of death for many promising energy technologies. The learning curve that Grech compares to that of solar or wind took decades to lower costs to competitive levels. That being said, the platform is in the water. And that, in this sector, is already a lot. Image | Global OTEC Xataka | Every year millions of birds die because of wind turbines. The solution: paint them like poisonous snakes