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Central Measuring of Power, Water and Gas, using Optical Fibre

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Type of building Other
Number of KNX devices 7
Summary This project presents the measuring of the consumed quantity of Water (in liters), Gas (in liters) and Electric Power (in KWh), of a house, using KNX technique. This project has been created by the pupils of the 2nd Laboratory Center (the 2nd Laboratory Center is a secondary technical school in the area of Volos in Greece), for the needs of a Greek National Competition. In fact this project was a proposal to the Greek authorities, in order to optimize and reduce the cost of the measuring the above consumptions. The project uses optical fibres for the communication between sensors and visualization system. For this purpose, two KNX optical fibre interfaces are used. Used KNX devices: 1. One Meter Interface Module (for measuring of electric power): Receives data and values from an energy meter and transforms them into KNX telegrams. These data used for visualization and monitoring purposes. 2. One Universal Interface, 4-fold (for measuring of the consumed quantity of water and gas): The 4 channels have been parameterized as inputs. The first two inputs are connected to a conventional sensor for measuring pulses for the quantity of water and the other two inputs to a second conventional sensor for measuring pulses for the quantity of gas. 3. One Touch Panel (for visualization and monitoring purposes): The touch panel is used to visualize, monitor and record the three consumed quantities. The connection between the touch panel and the rest KNX devices is achieved via a pair of optical fibre. For this purpose two KNX optical fibre interfaces are used. 4. Two KNX optical fibre interfaces: The two KNX optical fibre interfaces are used for the connection of the touch panel and the rest KNX devices. 5. Two Power Supply: The project consists by two discrete parts: The first one contains one Power Supply, the Meter Interface Module, the Universal interface and one Optical Fibre Interface. The second one contains the second Power Supply, the second Optical Fibre Interface, and the Touch Panel. The two discrete parts are connected via a pair Optical Fibres.
Main technical highlights 1. This technique can be extended in order to measure and record the three consumptions of an area or a city, using a combination of pair twister cable and optical fibres. 2. Each customer can see the consumption of his house using a tablet or mobile phone. In this case a KNX IP Router is necessary in each house. 3. It is not necessary to use employees to measure the three consumptions of each house.
Benefits of KNX 1. Easy way to measure the consumptions of a house by the customer and the companies which sell the water, gas and electricity. 2. Easy installation of the system. 3. This technique can be extended in order to measure and record the three consumptions of an area or a city, using a combination of pair twister cable and optical fibres. 4. Each customer can see the consumption of his house using a tablet or mobile phone. In this case a KNX IP Router is necessary in each house. 5. It is not necessary to use employees to measure the three consumptions of each house.
Which functions were realised with KNX 1. Local Monitoring: The customer is able to see his / her consumption any time. 2. Remote Monitoring: Each company is able to see the consumptions of their customers any time. 3. Automatically Measuring: The measuring of the consumptions is made automatically. 4. Automatically Recording: The recording of the consumptions is made automatically. 5. Centralization Control: The center can monitor if there is any problem at the sensors of the system (conventional sensors, meter interface module).
Energy Management Central measuring and controlling of the three main consumptions of a house: Electric Power, Water and Gas.
Visualization Monitoring, recording and visualization the three consumed quantities of a house.

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