Petroleum dripped into a vacuum-insulated boiler over magma-heated metal tiles boils into sour gas, which rises to the pump at the top. In the condenser next door a super coolant loop holds the room below -162.5 °C, so the sour gas falls out as liquid methane and sulfur; the methane is pumped out, warms into natural gas and runs two generators, while the aquatuner chilling the loop dumps its heat into a steam chamber whose turbine returns power.