A fuel supply system for an internal combustion engine operable using hydrogen and/or for a fuel cell includes a hydrogen tank, which is provided for storing deep-cooled, liquid hydrogen, and a heat exchanger, which is provided for preheating the deep-cooled hydrogen. The heat exchanger is enclosed by a fluid-tight mantle. An intermediate space is provided between the heat exchanger and the mantle, which has a fluid flowing through it, which delivers heat to the heat exchanger and insulates the heat exchanger in relation to the surroundings.

 
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< Coaxial-flow heat exchanging structure for installation in the earth and introducing turbulence into the flow of the aqueoue-based heat transfer fluid flowing along the outer flow channel while its cross-sectional characteristics produce fluid flows therealong having optimal vortex characteristics that optimize heat transfer with the earth

> Passive device for balancing the pressure of first and second fluids and the use thereof

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