FI20185083A1 - Method and device for heating parts of houses such as a bathroom in a house - Google Patents

Abstract

The present invention relates to a method and apparatus for heating a part of an apartment, such as an apartment bathroom, in a property having a hot water circulation circuit for supplying hot water to the apartments' consumption points at a specified temperature. In a partial space, a local liquid circuit is circulated, where the heating energy is transferred from the hot water circuit by a heat exchanger located in the partial space.

Description

METHOD AND SYSTEM FOR HEATING APPARATUS IN APARTMENTS SUCH AS THE BATHROOM OF AN APARTMENT IN A PROPERTY

A method and system for heating apartment compartments such as an apartment bathroom in a property having a hot water circuit for supplying hot water to the consumption points of the apartments at a specified temperature and wherein each compartment is heated by hot water heating energy.

State of the art

Separate heating cannot be connected to the domestic hot water supply. In many solutions, the hot water temperature drops in certain situations, eg in summer use.

Short explanation

The invention will now be described with reference to the accompanying drawings.

20185083 PRH 30 -01- 2018 Fig. 1 shows the domestic or domestic hot water system Fig. 2 shows a variant of Fig. 1 Fig. 3 shows a domestic hot water heat exchanger according to the invention with accessories Fig. 4 Fig. 1 First variation Fig. 5 shows Fig. 3 Second variation

In Figure 1, reference numeral 18 shows domestic hot water heating devices for a property connected to a district heating network. The heat exchanger with its control devices is otherwise conventional, but the domestic hot water circuit is designed for higher heat transfer. This means either a higher flow or a larger temperature difference in the circuit. According to the current design practice, the temperature difference between the 25 (valid guidelines Kl / 2013) hot water circuit is 3 C (58C - 55 C).

According to the invention, either a temperature difference of e.g. 5 C (60 C to 55 C) or a correspondingly higher flow (especially in detached houses) is used in the hot water circuit. The invention makes it possible to connect the heating and drying of the washing rooms to the hot domestic water circuit without the risks of known solutions. In this case, the heat transfer includes the heating power required for heating and drying the washrooms (10 to 40 W / m2, preferably 15 to 25 W / m2).

District heating devices include a heat meter (Q.Q.1), which measures the energy consumption of the heat transfer of the hot water circuit. Domestic hot water consumption (water points) does not interfere with this measurement because the flow measurement is on the return side of the cycle. Domestic hot water consumption is measured from the cold water supply pipe of the property's domestic hot water exchanger.

Figure 1 shows the apartments with standard water intakes such as a shower, hand basin and toilet seat. It is essential for the invention that the heating and / or drying of the washrooms takes place with a heat exchanger - local heating circuit connected to the domestic hot water circuit. Upon entering the apartment, there is an apartment lock 14 (before the heat exchanger) in the hot water pipe and

20185083 PRH 30 -01- 2018 The bypass control and shut-off valve is located after the heat exchanger. The hot water measurement is in the flow direction after the heat exchanger connection point. The heat exchanger unit 10 is detailed below (Figures 3,4,5 and 6). In the embodiment of Figure 1, the heat transfer of each washroom is a water circulating drying coil.

In the variant of Figure 2, the heat transfer of each washroom is water circulating underfloor heating, in which case a thermostatic return water valve (temperature limiter 20) known per se can be used for power control of the underfloor heating.

The heat exchanger unit 10 of Figure 3 has a heat exchanger 15, a pump 19, a 3-way control valve 17 and the necessary connections. Domestic water pipes are connected to the common 11a and 11b via service barriers.

The structure of the heat exchanger 15 is particularly simple. The heating circulating water flows at a constant flow into the domestic hot water pipeline inside an approved pipe 11c (pressure class 10 bar). The heated local circuit water circulates in the jacket of the heat exchanger 15 connected to the common 15.3 and 5.4. In the picture, the heat exchanger works on the countercurrent principle. If lower power is desired, a downstream connection is used. If more efficient heat transfer (smaller size or higher power) is required, the inner pipe is equipped with an external rib structure.

Figure 3 shows the filling connection 21 and the venting connection 23. The filling pressure, i.e. the static pressure of the secondary circuit (design value 0.5 bar at 20 C), can be measured from the filling connection of the secondary circuit during filling. The expansion and safety devices 24 and 26 of the secondary circuit are connected to the filling pipe. The operating pressure of the domestic water network is typically in the range of 3 to 5 bar, but the structural pressure used in Finland is 10 bar.

In one variant, the cylindrical shell differs suitably in shape from the tubular and symmetrical shape, it automatically provides elasticity.

The cylinder should be slightly flattened in cross section to an oval shape rather than curving the entire tube. If it happens industrially, the structure would become controlled in a flexible way. Then goes to the Construction Engineering side to ensure the elasticity of the structure in long-term use. The safety valve can be used to ensure extreme emergencies.

The low flexibility required in the secondary circuit is provided by the deformations of the sheath structure. An elastic member 15.1 and 15.2 can be used in the end joints.

The power of the local circuit circulating water pump is low. With the design values of the heating circuit 0.03 l / s and 10 kPa, the power requirement of the pump is, for example, 7W.

In a variation of Figure 4, the 3-way valve is replaced by two one-way control valves 17 '.

When the power requirement of the heat exchanger of Figures 3 and 4 is 150 to 300 W, the length of the jacket 15 is 250 to 1000 mm, preferably 400 to 600 mm. The inner tube is fii 12 -18 mm and the outer tube fii 22 -35 mm.

In addition to the embodiments of Figures 3-5, a plate heat exchanger can be used, which is here made very small.

Figure 5 shows a previous higher power heat exchanger 15 'with two jacket spaces in series. The jacket spaces are connected together with 15.5 and the inner pipes with a thermally insulated connecting pipe lld.

In the variant, a single pipe 15.5. can be replaced by a lld surrounding the jacket tube connecting the jacket tubes at their ends (not shown).

In a variation of Figure 6, the 3-way valve is replaced by two one-way control valves 17 '.

Claims (7)

The claims 1. A method for heating sub-rooms of apartments, such as a bathroom in an apartment, on a property with a hot water circuit for supplying hot water 5 at the temperature determined for the consumption points of the apartments and in which each sub-space is heated by domestic hot water heating energy, characterized in that the local space circulates its own local liquid circuit to which heating energy is transferred from the domestic water circuit by a heat exchanger connected to the sub-space. 2. A system for heating sub-rooms of apartments, such as a bathroom in an apartment on a building, comprising a hot water circuit for supplying hot water to the consumption points at a specified temperature and means for heating the sub-room with hot water, 15 characterized in that the system includes a local closed fluid circuit with pumps located in each sub-space. a heat exchanger between the domestic hot water circuit and the local liquid circuit to transfer heating energy to the local liquid circuit 20 heat transfer means located in the sub-space for transferring thermal energy to the sub-space from a local fluid circulation circuit. A system according to claim 2, characterized in that the heat exchanger comprises a coaxial tubular structure having at least one elongate, end-closed jacket tube and an inner tube longitudinally inserted therein, wherein one fluid circulation circuit is arranged in the inner tube and 25 second to flow in the jacket mode on a countercurrent basis. A system according to claim 3, characterized in that the coaxial tube structure of the heat exchanger comprises a straight jacket tube with its joint and a coaxial inner tube. A system according to claim 3 or 4, characterized in that the local liquid circuit comprises a bypass line with control valves for controlling the heat transfer temperature. 30 to reduce. System according to one of Claims 3 to 5, characterized in that the power transmission of the heat exchanger and thus of the heat transfer is arranged in the range from 200 to 500 W. System according to Claim 6, characterized in that the length of the heat exchanger jacket is 250 to 1000 mm.