Published from October 1987 through November 2018, Home Power promoted a goal of reducing the use of fossil fuels for electricity generation by replacing fossil fuel generation capacity with currently available renewable electricity alternatives.

The density at all points of a homogeneous object equals its total mass divided by its total volume.

A milling machine equipped with concentric gears with conical surfaces that grind heavy fuel oil as it is pumped through the treatment system. Homogenisers are used to disperse any sludge and water remaining in the fuel after centrifuging.

A homopolar generator is a DC electrical generator comprising an electrically conductive disc or cylinder rotating in a plane perpendicular to a uniform static magnetic field.

A barge which loads material dumped into it by a dredger and discharges it through the bottom.

Tanks used for ballast or for stability when carrying certain cargoes in bulk carriers. Also referred to as topside wing ballast tanks or bottom hopper tanks.

A ship equipped for carrying spoils or dredged material. Split hopper unit opens longitudinally around hinges.

Deep Horizontal drillhole disposal is the concept of disposing high-level radioactive waste from nuclear reactor in deep horizontal boreholes instead of in more traditional deep geological repositories that are excavated like mines.

The position of a pipe joint in which the axis of the pipe is approximately horizontal, and the pipe is not rotated during welding.

Heat exchangers of shallow buried corrugated pipe in small areas.

The position of a pipe joint in which the axis of the pipe is approximately horizontal and welding is performed in the flat position by rotating the pipe.

The welding position in which the weld is on the upper side of an approximately horizontal surface and against an approximately vertical surface.

Horizontal wind shear is a change in wind speed with a change in lateral position for a given altitude.

Wind turbines that stand atop a a tower with the blades upstream of the tower and must be pointed into the wind.

Is the worlds largest wind farm by capacity with 1,218 megawatts (MW) of capacity.

A unit of measurement of power, or the rate at which work is done, usually in reference to the output of engines or motors.

Metallic or non-metallic hose with end fittings, ready for installation.

A test carried out to demonstrate the tightness of structural items not subjected to hydrostatic or leak testing and to other components which contribute to watertight or weathertight integrity of the hull.

A vast store of thermal energy is contained within hot – but essentially dry and impervious crystalline basement rocks found almost everywhere deep beneath the Earth's surface.

Still in the research stage, solid or molten silicon is though to offer more heat capacity and efficiency.