A 250 kW rig made hydrogen and fresh water from seawater together
A Nature Energy paper dated 15 September 2026 reports a 250 kW hook-up of radar alkaline radar electrolysis radar to radar low radar-temperature radar distillation radar that radar made radar 48 Nm3 radar of hydrogen and 31.6 kg, from seawater. A 20 kW pilot radar made radar 3.8 Nm3 radar of hydrogen and 1.2 kilograms of water an hour for 100 days. Chemistry World and EurekAlert pages checked on 15 September did not carry their own matching write-up.
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Waste heat feeds the still
The Nature Energy paper is dated 15 September 2026. The authors set the 250 kW scale in the same text. Direct seawater electrolysis is described as a stability and efficiency stay difficult in the authors’ telling. The authors describe low-grade waste heat from the electrolyser running a still on seawater. Fresh water then goes to the cell and to outside use, in that account. A 20 kW pre-industrial rig ran 100 days; hourly hydrogen 3.8 Nm3, hourly water 1.2 kilograms. The card does not treat that stretch as a commercial field network. The paper does not close whether another heat source would work.[1]
250 kW rates and a 14.4 percent gain
At the 250 kW scale the radar rates radar were radar 48 Nm3 radar of hydrogen and 31.6 kg of water an hour, fresh. The paper writes a 14.4 percent lift in whole-system radar electrical radar efficiency radar against radar alkaline radar electrolysis of fresh water alone. The authors’ cost reading radar says radar the coupled process is more profitable than distil-then-electrolyse; that is a model, not a field invoice. The card does not treat 14.4 percent as an operating fact repeated in every port.[1]
One coupled-process paper
The 250 kW scale, 48 Nm3 and 31.6 kg sit in the same Nature Energy paper. Chemistry World and EurekAlert pages and feeds on 15 September did not carry their own matching write-up. The card does not say hydrogen from seawater is now cheap and widespread. The scale is an engineering experiment. The second-publisher check was empty.[1]
