Operation

ZoneGen operates by obtaining motive power from pressure drop in a gas stream confined within pipework. Pressure regulators are set and adjusted either side of the unit to give a constant pressure drop and stabilise the power environment. The pressure drop necessary is determined by the power output required within the design limitations of the particular turbine. An inbuilt mechanical governor restricts overspeeding under low load conditions. The governor may be adjusted at installation to optimise rpm.

At the high-pressure end, gas is fed through a nozzle or nozzles thereby producing a jet. The gas jet is directed at a turbine wheel on a shaft producing rotational energy. The shaft drives a generator rotor and the rotor produces an alternating electrical voltage in the generator windings.

The exhaust from the turbine is split in two directions. 90% of the exhaust is directed straight back into the low-pressure end of the pipework system. With gravity playing a part, this part of the exhaust gas will contain the vast majority of any liquid or solid contaminants present in the gas stream. 10% of the exhaust gas, the "clean" element, is directed through the generator thereby acting as a coolant for the windings and casing.

This secondary exhaust path is also utilised at installation to purge the unit of air by bleeding through a capillary tube and thus removing any gas/air mixture