American Bloom Energy has commissioned the world's largest high-temperature electrolyser at Nasa, with an output of 4 MW. The previous record thus stood for just one month. Hydrogen is predicted to become an important energy carrier in the transition to a renewable energy system. The hydrogen is produced by an electrolyser powered by electricity, by splitting water. The most common types of electrolyzers are the alkaline and PEM, which operate at relatively low temperatures. Premium They will produce liquid hydrogen more cheaply – with magnets But there is also a type called a high-temperature electrolyser. In English it is called solid oxide electrolyzer (SOE). The temperature is usually between 500 and 800 degrees. The advantage is that a significantly higher efficiency, up to 100 percent, is possible compared to alkaline or PEM electrolysers (English: proton exchange membrane). But it requires that it has access to "free" heat, for example waste heat from an adjacent process industry. Low temperature electrolyzers are around 60-80 percent efficiency. Now the San José-based company Bloom Energy, founded in 2001, announces that it has commissioned the world's largest high-temperature electrolyzer. It is at NASA's Ames Research Center in Mountain View, California. The electrical output is 4 MW, which means it beats the previous record of 2.6 MW by a wide margin. The previous record was also set just one month ago, by an electrolyser at Finnish fuel producer Neste's refinery in Rotterdam, manufactured by German Sunfire. Bloom Energy's electrolyser can produce 2.4 tonnes of hydrogen per day. The efficiency is not disclosed in the press release, but the company states that it produces 20-25 percent more hydrogen gas per megawatt of electricity compared to commercially demonstrated low-temperature electrolysers. In another demonstration project, Bloom Energy has produced 1 kg of hydrogen with 37.7 kWh of electricity. A good value for a low-temperature electrolyzer is 50 kWh, according to Hydrogen Insight. https://www.nyteknik.se/energi/varldens-storsta-soe-elektrolysor-producerar-vatgas/2052561