Provided are turbine engines and methods of operating thereof by heating and evaporating liquid fuels in a controlled manner prior to burning. Specifically, a fuel is heated and evaporated while avoiding coking. Coking is caused by pyrolysis when the fuel contacts a metal surface within a certain temperature range, which is referred herein to a coking temperature range. In the described methods, the fuel is transferred from one component, maintained below the coking temperature range, to another component, maintained above this range. The fuel is airborne and does not contact any metal surfaces during this transfer, and coking does not occur. In some examples, the fuel is also mixed with hot air during this transfer. The heated fuel, e.g., as an air-fuel mixture, is then supplied into a combustor, where more air is added to reach flammability conditions.

The fuel preheater for an internal combustion engine is a system for preheating fuel vapor prior to its injection into an internal combustion engine for combustion thereof. In the fuel preheater for an internal combustion engine, a portion of the exhaust from the internal combustion engine is used to transfer heat to a mixture of the fuel vapor, environmental air and recycled exhaust. The preheating of the fuel vapor and the addition of nitrous oxide from the recycled exhaust increases combustion efficiency of the fuel and enhances overall performance of the internal combustion engine.

A system for handling surplus methane in a fuel supply system for an internal combustion engine (ICE) system, the system comprising: an inert gas supply system configured to be in fluid communication with the fuel supply system and further configured to supply inert gas to an inert gas supply conduit position of the fuel supply system; a burner configured to be in fluid communication with the fuel supply system via a controllable valve device, the controllable valve device being disposed downstream the fuel supply conduit position; and a controller comprising processing circuitry configured to: predict an upcoming ICE non-operational time period; in response to the predicted ICE non-operational time period, determine to inject inert gas to the inert gas supply conduit position so as to flush the fuel supply system; and control the controllable valve device to direct any flushed-out methane to the burner.

An engine device drives an engine by supplying a low GHG fuel having low greenhouse gas emissions, the engine device including a heating unit that heats at least one of air that is mixed with the low GHG fuel, and the low GHG fuel. In a case where pre-ignition of the low GHG fuel in the engine occurs, or is predicted, heating by the heating unit is reduced or stopped.

A system for handling surplus methane in a fuel supply system for an internal combustion engine (ICE) system, the system comprising: an inert gas supply system configured to be in fluid communication with the fuel supply system and further configured to supply inert gas to an inert gas supply conduit position of the fuel supply system; a burner configured to be in fluid communication with the fuel supply system via a controllable valve device, the controllable valve device being disposed downstream the fuel supply conduit position; and a controller comprising processing circuitry configured to: predict an upcoming ICE non-operational time period; in response to the predicted ICE non-operational time period, determine to inject inert gas to the inert gas supply conduit position so as to flush the fuel supply system; and control the controllable valve device to direct any flushed-out methane to the burner.