Techniques for detecting a high gas pressure situation within a gas delivery system (e.g., for natural gas delivery to homes and businesses) are described. In one example, a device measures gas pressure. If a pressure over a threshold value is detected, a nearby device is messaged. The nearby device either confirms the over-pressure condition or indicates it may be more localized. If the condition is present within an area of the gas delivery system and/or within a group of devices within the gas delivery system, protective measures may be taken, such as closing valves providing gas to a number of service sites.

An infrastructure monitoring assembly includes a nozzle cap defining an internal cavity; an antenna positioned at least partially external to the internal cavity; and the antenna covered with a non-metallic material. An infrastructure monitoring assembly includes a nozzle cap defining a first end and a second end, the first end defining a threaded bore configured to mount on a nozzle of a fire hydrant; a cover coupled to the nozzle cap opposite from the first end; an enclosure positioned at least partially between the cover and the first end, the enclosure at least partially defining a cavity; a monitoring device positioned within the cavity; and an antenna positioned between the cover and the first end of the nozzle cap, the antenna connected in electrical communication with the monitoring device, the antenna covered by a non-metallic material.

An infrastructure monitoring assembly includes a nozzle cap defining an internal cavity; an antenna positioned at least partially external to the internal cavity; and the antenna covered with a non-metallic material. An infrastructure monitoring assembly includes a nozzle cap defining a first end and a second end, the first end defining a threaded bore configured to mount on a nozzle of a fire hydrant; a cover coupled to the nozzle cap opposite from the first end; an enclosure positioned at least partially between the cover and the first end, the enclosure at least partially defining a cavity; a monitoring device positioned within the cavity; and an antenna positioned between the cover and the first end of the nozzle cap, the antenna connected in electrical communication with the monitoring device, the antenna covered by a non-metallic material.

Disclosed is a gas plant (16), in particular for a gas installation (10), comprising an expansion system (18) capable of converting high-pressure gas into low-pressure gas. The gas plant comprises an electricity generating system (30) arranged in parallel with the expansion system (18) and comprising a double-acting actuator (32) comprising two supply ports alternately supplied with high-pressure gas, a hydraulic system (34) connected to the double-acting actuator (32) and configured to transform the mechanical translational energy of the actuator into mechanical rotational energy; and an electricity generator (36) connected to the hydraulic system (34) and configured to convert the mechanical rotational energy into electrical energy.

Disclosed is a gas plant (16), in particular for a gas installation (10), comprising an expansion system (18) capable of converting high-pressure gas into low-pressure gas. The gas plant comprises an electricity generating system (30) arranged in parallel with the expansion system (18) and comprising a double-acting actuator (32) comprising two supply ports alternately supplied with high-pressure gas, a hydraulic system (34) connected to the double-acting actuator (32) and configured to transform the mechanical translational energy of the actuator into mechanical rotational energy; and an electricity generator (36) connected to the hydraulic system (34) and configured to convert the mechanical rotational energy into electrical energy.

Techniques for detecting a high gas pressure situation within a gas delivery system (e.g., for natural gas delivery to homes and businesses) are described. In one example, a device measures gas pressure. If a pressure over a threshold value is detected, a nearby device is messaged. The nearby device either confirms the over-pressure condition or indicates it may be more localized. If the condition is present within an area of the gas delivery system and/or within a group of devices within the gas delivery system, protective measures may be taken, such as closing valves providing gas to a number of service sites.

In a gas supply system of one embodiment, if first detection information of a high-pressure sensor exceeds a first threshold value, a gas control ECU causes a pressure adjustment range to overlap a second error range of second detection information of a mid-pressure sensor, the second error range being defined with a second threshold value as a reference point. If the first detection information is less than or equal to the first threshold value, the gas control ECU offsets the pressure adjustment range relative to the second error range defined with the second threshold value as the reference point.

In a gas supply system of one embodiment, if first detection information of a high-pressure sensor exceeds a first threshold value, a gas control ECU causes a pressure adjustment range to overlap a second error range of second detection information of a mid-pressure sensor, the second error range being defined with a second threshold value as a reference point. If the first detection information is less than or equal to the first threshold value, the gas control ECU offsets the pressure adjustment range relative to the second error range defined with the second threshold value as the reference point.

Techniques for detecting and remediating a low gas pressure situation within a gas delivery system are described. In one example, a smart gas metering device measures gas pressure. The first device determines that the gas pressure value is less than a first threshold value, indicating a low gas pressure condition. The first smart metering device reports this condition to a second smart metering device, which may be nearby. In response, the first smart metering device receives gas pressure information from the second smart gas metering device. The first smart gas metering device then reports one of two conditions to a headend device, such as a main office server. In a first possibility, the report indicates a low gas pressure event confined to the first device. Alternatively, the report indicates a low gas pressure event within a distribution area comprising the first device and the second device.

A method for an underground gas storage reservoir management may include obtaining feed from a domestic master gas system. The method further includes simultaneously injecting and reproducing in an underground gas storage via a plurality of dual producer and injector wells. The method further includes enhancing the underground gas storage reservoir management to maximize gas and condensate recovery. The method further includes improving a switching cycle between dual operation modes in the underground gas storage for faster reaction times through a completely segregated injection and reproduction lines.