The invention related to liquid supply systems of buildings and constructions, where intake water line is connected to outer municipal, city, or local water supply. Also, liquid supply systems with two liquid sources, where intake liquid line is connected to outer water supply and simultaneously to the alternative water source, for example vessel filled with rainwater are known from the state of the art. Such systems can be used for cold as well as for hot water. The water supply system includes a liquid intake line, connected with at least two sources of wateran outer water supply line and an alternative source, made as a collecting vessel, and a liquid supply line, characterized in predominant water supply from the alternative source as the tank on the alternative source water supply line has the pressure higher than the pressure of the outer source.

An aircraft has: an aircraft fuselage, a cabin region formed in the aircraft fuselage, underfloor region separated from the cabin region by a floor partition, and a fresh-water supply system. The fresh-water supply system has a fresh-water provision unit arranged in the underfloor region. The fresh-water supply system has multiple water extraction units which are each arranged in the cabin region, and a water line network branched off from the fresh-water provision unit and extending to the water extraction units. Each water extraction unit has a shut-off valve, a filter unit and a tapping point, which are coupled in series by means of water lines. Each filter unit has an exchangeable water filter with a first filter material designed for filtering particles out of the water flowing through the water filter and with a second filter material designed for softening the water flowing through the water filter.

An aircraft has: an aircraft fuselage, a cabin region formed in the aircraft fuselage, underfloor region separated from the cabin region by a floor partition, and a fresh-water supply system. The fresh-water supply system has a fresh-water provision unit arranged in the underfloor region. The fresh-water supply system has multiple water extraction units which are each arranged in the cabin region, and a water line network branched off from the fresh-water provision unit and extending to the water extraction units. Each water extraction unit has a shut-off valve, a filter unit and a tapping point, which are coupled in series by means of water lines. Each filter unit has an exchangeable water filter with a first filter material designed for filtering particles out of the water flowing through the water filter and with a second filter material designed for softening the water flowing through the water filter.

Described herein, are methods and systems for locating a leak in a water distribution network. According to an implementation, a leak situation in the water distribution network is detected based on a flow difference value between an actual flow value and a predicted flow value of an inlet flow meter of the water distribution network at at least one time interval. Leak signature values of demand nodes in the water distribution network at the at least one time interval are determined. A leak signature value of a respective demand node at a respective time interval is determined based on centrality metrics, the predicted flow value at the respective time interval, and static physical properties related to the water distribution network. At least one possible leak node is identified based on the flow difference value and the leak signature values of the demand nodes at the at least one time interval.

Described herein, are methods and systems for locating a leak in a water distribution network. According to an implementation, a leak situation in the water distribution network is detected based on a flow difference value between an actual flow value and a predicted flow value of an inlet flow meter of the water distribution network at at least one time interval. Leak signature values of demand nodes in the water distribution network at the at least one time interval are determined. A leak signature value of a respective demand node at a respective time interval is determined based on centrality metrics, the predicted flow value at the respective time interval, and static physical properties related to the water distribution network. At least one possible leak node is identified based on the flow difference value and the leak signature values of the demand nodes at the at least one time interval.

The present invention relates to a system and method for managing water or other fluid that provides monitoring and reliable control of the use of water or other fluid in a given territorial area, facilitating the management of water use or other fluid in processes where it is involved, for example in tasks of irrigating agricultural land or in industrial processes using fluids such as leaching. The system and method of the invention operates on the basis of a distributed monitoring and control logic implemented to control and monitor a hydraulic system located in the given territorial area by an arrangement of sensors, actuators and controllers deployed in communication with a network of nodes that allows a user to monitor, control and automate the use of water in that territorial area, reducing to almost zero user intervention in the process of monitoring and control to almost zero.

Provided is a control device, etc., with which it is possible to increase the accuracy of control of a pump, valve, etc., provided to a pipeline network. This control device is provided with: a friction loss calculation unit for determining pressure friction loss on the basis of the pressure of a fluid in piping; a control amount calculation unit for determining, on the basis of the friction loss, a control amount of the pump or valve that controls the distribution of water in the piping; and a control unit for controlling the pump or valve on the basis of the control amount.

A model formation module (25) is provided for creating a model for controlling a pressure regulating system (7) of a water supply network (5), wherein the water supply network (5) is equipped with one or more pressure sensors of which at least one remote pressure sensor (17a,b) is arranged remotely from the pressure regulating system (7), the model formation module (25) being configured to communicate with the at least one remote pressure sensor (17a,b). The model formation module (25) is configured to create said model without a measured, determined or estimated flow value on the basis of at least one remote pressure value determined by the at least one remote pressure sensor (17a,b) and on the basis of at least one load-dependent variable of the pressure regulating system (7), said model representing at least one pressure control curve for controlling the pressure regulating system (7).

An abnormal consumption detection system is provided with remote valve control for a distributed water infrastructure. The system may comprise an electronically controllable valve, a remote communication transmitter, a remote communication receiver, at least one sensor for measuring water flow information associated with the distributed water infrastructure, and at least one processor. The system may determine from the water flow information obtained from the at least one sensor a potential abnormal consumption associated with the distributed water infrastructure. The system may automatically close a valve, without human intervention, when the potential abnormal consumption is determined. The system may transmit, via the remote communication transmitter to a remote administrator, alert information about the potential abnormal consumption to enable an administrator to decide based on the transmitted information whether to reopen the valve. The system may receive from the administrator via the remote communication receiver a control signal to reopen the valve, despite the information about the potential abnormal consumption, and reopen the valve.

A system is provided for determining from a location upstream of a plurality of water appliances, whether a specific water appliance is malfunctioning. The system may comprise at least one processor. The system may detect, from at least one sensor in a distributed water infrastructure upstream of the plurality of water appliances, a plurality of normal water usage profiles. The system may associate at least one of the plurality of normal water usage profiles with each of the plurality of water appliances. The system may store each of the plurality of normal water usage profiles in a manner associating each of the plurality of normal water usage profiles with an associated water appliance. The system may detect at least one current water usage profile. The system may compare the at least one current water usage profile with at least one of the stored normal water usage profiles to determine a corresponding identity of an associated water usage appliance and to determine if a substantial deviation exists between the stored normal water usage profile for the identified appliance and the at least one current water usage profile. The substantial deviation may be reflective of a potential malfunction in the associated water usage appliance. The system may initiate remedial action if the substantial deviation, reflective of a potential malfunction, is determined.