Disclosed is an apparatus for detecting a leakage of a coolant in a battery cooling device for a vehicle. In particular, the apparatus includes: a first pressure sensor to detect a first pressure in a coolant pipe; and a controller to receive a first pressure value from the first pressure sensor. The controller determines whether the coolant leaks in the coolant pipe based on the first pressure value.

Described herein are systems, devices, and methods for detecting leaks of liquids or gases in a transporting network. In one embodiment, a flow detector for detecting volume and direction of flow is attached to a system transporting such liquid or gas, changes are sensed over time, and data is sent to and from a controller. In alternative embodiments, static and dynamic states are identified and differentiated to identify relatively small leaks. In some embodiments, the transporting network is emptied in whole or in part, thereby allowing the measurement of relatively small leaks. In some embodiments, aggregate measurement data is processed to identify usage and performance features particular to the transporting network, which allows a continuous improvement in the measurement of leaks and flow direction. In some embodiments, corrective action is taken automatically, while in other embodiments human operators order corrective action.

Systems and methods include a method for locating a leak in a pipeline. Pressure and flowrate measurements are received corresponding to fluid flowing through a pipeline for which a leak is to be located in a pipeline segment. A calculated leak size is determined based pressure and flowrate measurements for upstream and downstream locations. A first assumed leak location is identified. A first assumed leak size is determined. A simulation is executed based on the first assumed leak size, first assumed leak location, and pressure and flowrate measurements, producing a virtually measured leak size. If a difference between the virtually measured and calculated leak size is not within acceptance criteria, a second assumed leak size is iteratively determined, the simulation is re-executed, and the difference is re-determined. A second assumed leak location is iteratively identified, and the simulation is re-executed to determine an estimated leak location of the leak.

A liquid chromatography monitoring system comprises a computer or electronic controller comprising computer-readable instructions operable to: (a) draw a fluid into a syringe pump; (b) configure a valve so as to fluidically couple the pump to either a fluidic pathway through a fluidic system or to a plug that prevents fluid flow; (c) cause the syringe pump to progressively compress the fluid therein or expel the fluid to the fluidic pathway, while measuring a pressure of the fluid; (d) determine a profile of the variation of the measured pressure; (e) compare the determined profile to an expected profile that depends upon the fluid; and (f) provide a notification of a sub-optimal operating condition or malfunction if the determined profile varies from the expected profile by greater than a predetermined tolerance.

A leak detection system for a building includes a pressure regulating valve (PRV) having a PRV inlet and a PRV outlet. The PRV is operative during a flow of water through the PRV, and a PRV pressure at a lockup pressure during no water flow through the PRV. An outlet pressure sensor is fluidly coupled to the PRV outlet to measure a PRV outlet pressure. A processor is operatively coupled to the outlet pressure sensor. The processor is configured to run a pressure monitoring process to detect changes in pressure at the PRV outlet when the PRV pressure falls below the lockup pressure while remaining above a setpoint pressure to give an indicia of a fixture leak. A method to give an indicia of a fixture leak is also described.

A leakage detection device for detecting water leakage in a water pipe of a water system after a stop valve of the water system is closed. The leakage detection device may be part of a stop valve, and may include an interior chamber connectable to the water pipe in such a way so as to receive a stagnation volume of the water when the water flow through the water pipe is stopped by the stop valve. An actuation element provides a force acting on a diaphragm or a piston in the direction of the first interior chamber and against or into the stagnation volume of water. If water leakage is present in the water pipe, the diaphragm or piston will move under the applied force to compensate for the leakage in the water pipe. A sensor unit may detect water leakage in the water pipe based on the movement.

A computer-implemented method, computer program, and device for evaluating timed-based probabilities of failure of sections of a pipe network are provided. To do so, the pipe sections are clustered into classes based on structural and environmental parameters; within each class a sample of pipe sections are selected to be inspected. The scores that are obtained through the inspection are used to train a model of pipe conditions of pipes in a class, in order to estimate the pipe conditions of pipes that have not been inspected. The pipe conditions are used to parameterize a predictive model of pipe failures.

A method is provided for detecting and quantifying obstructions in a gas network under pressure or vacuum. The gas network may be provided with a sensor(s) capable of recording the status of a source(s), consumers, or consumer areas. The method includes: a possible start-up phase; a baseline or zero phase; and an operational phase. The operational phase includes: reading out the first group and second group of sensors; re-estimating, determining or calculating the physical model or mathematical relationship on the basis of the read measurements from the sensors; determining or calculating of the existence of an obstruction in the system based on the difference and/or its derivatives between the parameters of the physical model or mathematical relationship as determined during the baseline or zero phase and the operational phase; generating an alarm and/or generating a degree of obstruction and/or generating the corresponding obstruction if an obstruction is detected.

Fluids are normally transported from one place to another through pipelines. It is essential to monitor the pipeline to avoid leakage or theft. It is expensive and not feasible to install cameras and sensors along the whole length of the pipeline. A system and method for inspecting and detecting fluid leakage in a pipeline has been provided. The system is using vibration sensors along with pressure sensors to detect the leakage or theft along with the exact location of the leakage or theft. The pressure sensors are mounted on the pipeline so that the fluid touches the diaphragm of the pressure sensors to sense the wave generated due to leakage. The vibration sensors are mounted on top of the pipeline surface and on the nearby ground to eliminate general noise conditions. Moreover, two pressure sensors are also installed at opposite sides to pinpoint the leakage location.

A method that consists of the following steps: depressuring and isolating the annular space; recording a first pressure and temperature prevailing in the annular space; injecting a given amount of a measuring gas into the annular space and isolating the annular space, the annular space remaining under negative pressure after the injection and isolation; measuring the given amount of measuring gas; recording a second pressure in the annular space after the isolation of the annular space; and determining the free volume of the annular space on the basis of the first pressure, the second pressure, the temperature, and the measurement of the given amount of measuring gas.