Flow valve system with ultrasonic flow sensor

A flow system comprising:

• a flow sensor connected via a plurality of fluid delivery pipes between a fluid source and a fluid distributor, the plurality of fluid delivery pipes including a first pipe connected between the fluid source and an inlet to the flow sensor and a second pipe connected between an outlet of the flow sensor and the fluid distributor, wherein:
• proximate the inlet of the flow sensor, the first pipe has a first interior diameter;
• and
• proximate the outlet of the flow sensor, the second pipe has a second interior diameter;
• and at least one of the following:
• a distance or length L1 between an inlet of the flow sensor and a flow diversion in the fluid path of the first pipe leading to the inlet of the flow sensor is less than ten times the first interior diameter;
• and
• a distance or length L2 between the outlet of the flow sensor and a flow diversion in the fluid path of the second pipe exiting the flow sensor is less than five times the second interior diameter, wherein:
• the flow diversion in the fluid path of the second pipe includes a junction between an inlet of the second pipe that is connected to an outlet of the flow sensor, a first outlet connected to an inlet of a fluid valve, and a second outlet;
• and
• a third pipe includes a flow diversion in the fluid path of the third pipe in the form of a junction between a first inlet of the third pipe connected to an outlet of the fluid valve, a first outlet connected to the fluid distributor, and a second inlet;
• a shunt pipe is connected in parallel with the fluid valve between the second outlet of the second pipe and the second inlet of the third pipe;
• and
• a second fluid valve and a hydrogenerator are mounted to the shunt pipe such that fluid flowing from the second pipe to the third pipe via the shunt pipe flows through the second fluid valve and the hydrogenerator, the hydrogenerator generating electrical power in response to the fluid flowing through the hydrogenerator.

A flow system comprising:

• a flow sensor;
• a first pipe configured to transport fluid from an upstream fluid source to the flow sensor, and
• a second pipe configured to transport fluid from the flow sensor to a downstream fluid distributor, wherein:
• proximate the flow sensor, the first pipe has a first interior diameter and the second pipe has a second interior diameter, and
• at least one of the following:
• a first flow diversion or a first flow obstruction positioned between the flow sensor and the upstream fluid source a distance or length L1 from the flow sensor that is less than ten times the first interior diameter of the first pipe;
• and
• a second flow diversion or a second flow obstruction positioned between the flow sensor and the downstream fluid distributor a distance or length L2 from the flow sensor that is less than five times the second interior diameter of the second pipe, wherein:
• the flow sensor is programmed or configured to output to a controller an electrical signal related to a velocity or volume of fluid flowing by, proximate to, or through the flow sensor;
• the controller is programmed or configured to determine, based on the electrical signal, an actual volume of fluid flowing by, proximate to, or through the flow sensor;
• the controller comprises a first processor programmed or configured:
• with a calibration value related to the distance or length L1, or the distance or length L2, or a type, style, or configuration of the flow diversion or the flow obstruction in the first pipe, or a type, style, or configuration of the flow diversion or the flow obstruction in the second pipe, or some combination thereof;
• and
• to determine, based on the electrical signal and the calibration value, a second electrical signal related to an actual velocity or volume of the fluid flowing by, proximate to, or through the flow sensor, wherein the electrical signal and the second electrical signal are different.