The system is a self-oxidation internal heating steam reforming system for conducting self-oxidation of a raw material gas under the presence of oxygen and conducting steam reforming to generate a hydrogen-rich reformed gas. The system includes a steam gen...

The present invention provides an EGR cooler that is easy to manufacture and can accelerate heat exchange. Round in section tubes 1 are plastically deformed in one plane crossing centerlines thereof such that corrugated exhaust gas flow paths are formed in...