CZ16787U1 - Apparatus for measuring consumption of warm service water - Google Patents

Description

Equipment for measuring domestic hot water consumption

Technical field

The device relates to the measurement of the flow of fluids in which fluid flows through a measuring device.

BACKGROUND OF THE INVENTION

When supplying domestic hot water from a central source to multi-dwelling buildings, the individual dwellings are connected to a hot-water pipe, in which the hot water is still circulated, so that hot water complying with the standard is available at the supply point. The amount of hot water taken is measured by the housing water meters installed at each tap. The cost of hot water is calculated as the sum of the costs of the quantity of cold water taken and the cost of the heat delivered for its heating. From such measurements it is not possible to determine the actual costs of hot water and the costs of heat loss in distribution systems. In addition, residential water meters can be influenced by the user to the detriment of the amount of hot water actually taken.

The essence of the technical solution

The essence of the technical solution consists in complementing the measurements with house water meters with differential flow meters with flow sensors mounted on the foot of the circulation loop in the house with a lost heat calorimeter, included in the return branch of the circulation loop with thermometers at the inlet and outlet of the circulation loop. The advantages of the solution are low energy consumption with minimal maintenance. The system is very stable and resistant to attempts to influence it.

The meters arranged in the designed circuit allow to accurately quantify the heat loss in the house distribution system during hot water supply.

Overview of the figure in the drawing

The attached drawing shows schematically one hot-water circuit in a house with flow sensors and differential flow meter, heat meter of extracted water, calorimeter of lost heat in the circulation part of the distribution system with thermometers.

Examples of technical solution

At the inlet of the circulation loop 2, connected to the hot water pipe 1, a hot water flow sensor 3 and an inlet thermometer 4 are connected. Behind them, all hot water tapping points 5 with domestic water meters are connected to the circulation loop 2. Downstream of the sampling points 5, behind which the thermostatic valve 14 is also placed, a return flow sensor 6, a flow meter 7, an outlet thermometer 8, a valve 9 and a non-return valve 10 are mounted on the circulation loop 2. and the return flow sensor 6 are connected to a differential flow meter 11. The output of the differential flow meter 11 is connected to the first inlet of the concentrator 12. Its second input is connected to the output of the lost heat meter 13, to the inputs of which the output of the leaked water meter 7, the input thermometer 4 and the output thermometer 8 are connected. 12 is led to the evaluation center. The supply water flow sensor 3 indicates the amount of hot water flowing into the loop 2. The return water flow sensor 6 supplies information about the amount of hot water returning from the circulation loop 2 to the hot water line i. The difference of their values indicated by the differential flow meter 11 industrial water. The data is fed to the concentrator 12, which also receives data from the heat meter 13 lost by the flow of hot water in the circulation loop 2. The lost heat meter 13 receives information from the flow meter 7 of the supplied but unused hot water, input thermometer 4 and output thermometer 8. These are energy losses from insufficient piping insulation, which occur by circulation of hot service water even at the time of zero consumption at the sampling points 5. Data from the concentrator 12

They are led to an evaluation center, which is a monitoring system or a control computer. The thermostatic valve 14 throttles the circulation of water in the circuit as long as the water after the last tap 5 is appropriately warm. The valve 9 is intended for hydraulic adjustment of the system. The non-return valve 10 prevents a change in the direction of water circulation in the pipeline.

Claims (1)

. 5 Claims for protection 1. Equipment for measuring the consumption of domestic hot water supplied from a central source in a hot-water pipeline with a supply and return branch to a circulation loop from which individual offtake points are connected, equipped with domestic water meters in which a differential flow meter with sensors is mounted in a supply and return branch, in which a thermostatic throttle valve can be mounted, and in which also a system hydraulic control valve and a non-return valve are normally mounted, characterized in that between the hot water pipe (1) to the supply line of the circulation loop (2) ) and an inlet thermometer (4) is mounted at the hot water taps (5), an outlet water meter (7) and an outlet thermometer (8) are mounted downstream of the taps (5) on the return loop of the circulation loop (2). Gauges (11) 15 the differential flow is connected to the first inlet of the concentrator (12), the second inlet of which is connected to the output of the lost heat meter (13), the first inlet of which is connected to the outlet of the water meter (7). ) of the lost heat, the inlet thermometer (4) and the outlet thermometer (8) are connected.