CZ281807B6 - Circuit arrangement of hot service water central distribution - Google Patents

Abstract

This connection with an inside loop (4) equipped with an input line from the central water distribution and an output line back to the central distribution and the inside loop (4) is connected to at least one hot water consumption outlet and in the inside loop (4) there is a heat exchanger (2) for heating the water of the inside loop (5) passing through the exchanger (2) and equipped with at least one hot water off-take outlet (7). The inside circuit (5) is connected to the inside loop (4) by a coupling line (6) equipped with a water meter (1) terminating in the inside circuit (5) in front of the first off-take outlet (7) and terminating from the inside loop (4) in front of the heat exchanger (2).<IMAGE>

Description

Connection of central distribution of domestic hot water

Technical field

The invention relates to the connection of a central domestic hot water distribution system, with a loop provided with an inlet conduit from the central water distribution system and an outlet distribution system back to the central distribution system, wherein at least one hot water withdrawal outlet is connected to the loop.

BACKGROUND OF THE INVENTION

In the known connection of the central domestic hot water distribution system to individual buildings, the distribution loop supplied from the central source is led to the individual service water abstraction points and then back to the central distribution system. Each tap is then provided with a separate water tap. This connection has the disadvantage of having to use many water abstraction meters, which, in particular for buildings with many water abstraction, but which is intended to determine the total consumption of domestic hot water, such as a hotel building, substantially increases the measurement costs.

In other known tap connections, the tap is passed through each tap, one tap being in the loop on its inlet pipe to the object, and another tap in the loop on its outlet pipe from the building. This connection brings a considerable saving of meters, but it also causes a possible significant error of water consumption measurement with respect to the deviation of the measuring accuracy of the input and output meters. The different measurement accuracy of the input and output meters then results in a significant distortion of the domestic hot water abstraction, especially at a time when the total domestic hot water abstraction is low in relation to the total volume of circulating water.

It is an object of the present invention to connect a central domestic hot water distribution system that increases the accuracy of its consumption measurement, while allowing the gradual cooling of domestic hot water in the internal circulation with minimal losses.

SUMMARY OF THE INVENTION

The central domestic hot water circuit according to the invention is characterized in that a heat exchanger is provided in the inner loop for heating the water of the inner circuit passing through the heat exchanger and provided with at least one hot water outlet. and flowing into the inner circuit before the first discharge outlet and resulting from the inner loop before the heat exchanger. A circulation pump is installed in the internal circuit. A heat meter is included in the return loop of the inner loop.

The advantage of connecting the local domestic hot water tap according to the proposed technical solution is the use of only one tap meter for the whole object, thus eliminating the measurement inaccuracy given by using multiple meters, while the meter operates only when water is taken from one outlet. The use of a pump in the internal circuit also improves water distribution in systems,

-1GB 281807 B6 which have previously exhibited malfunctions. Another advantage is the possibility to install a mounting water meter between the heat exchanger and the central distribution system, which allows the flow rate of the circulating water to be adjusted in the central distribution system and thus a uniform supply of hot water to all buildings connected to the central distribution system. By installing the heat meter in the return loop of the inner loop, it is possible to measure the amount of heat removed from the inner loop into the inner circuit. Another advantage is to allow water to circulate in the building only during operating hours, which increases the significant savings in thermal energy, while the amount of thermal energy taken from the central distribution through the exchanger is lower than the heat loss in conventional circulation by cooling in the distribution.

Overview of the drawings

The attached drawing shows schematically the circuit according to the invention, wherein Fig. 1 shows the circuit without and Fig. 2 with the circulation pump. Giant. 3 shows a wiring with a built-in heat meter.

DETAILED DESCRIPTION OF THE INVENTION

An internal loop 4 is provided from the central domestic hot water distribution system 8, which is equipped with an exchanger 2 inside the building. From the exchanger 2, the internal loop 4 is routed back to the central distribution system 8. The internal circuit 5 through which the water circulates gravity or by means of a circulation pump 2 · The heat losses of the inner circuit 5 are covered by the output of the heat exchanger 2 from the water circulating in the inner loop 4. The individual water outlets 7 and the connecting line 6 are connected to the inner circuit 5. It flows from the inner loop 4 before the heat exchanger and flows into the inner circuit 5 before the first outlet 7. The measurement of the removed heat energy in the exchanger 2 is made possible by the heat meter 9, which is connected to the return line of the inner loop 4.

Claims (2)

Connection of a central domestic hot water distribution system, with an internal loop provided with an inlet line from the central water distribution line and an outlet line back to the central distribution line, wherein at least one hot water tap outlet is connected to the internal loop, a heat exchanger (2) for heating the water of the inner circuit (5) passing through the exchanger (2) and having at least one hot water outlet (7) is provided, the inner circuit (5) being connected to the inner loop (4) by a connecting line (6) ) provided with a water meter (1) and opening into the inner circuit (5) before the first discharge outlet (7) and resulting from the inner loop (4) before the heat exchanger (2). The central domestic hot water circuit according to claim 1, characterized in that a circulation pump (3) is installed in the inner circuit (5).