BE1024654A1 - SANITARY HOT WATER STORAGE DEVICE - Google Patents

Abstract

The subject of the invention is a device for storing sanitary hot water, comprising a storage tank and an access hatch for the storage tank, characterized in that the said access hatch is provided with a means of reduction and speed orientation of a water flow for supplying water to the storage tank.

Description

(30) Priority data:

04/28/2016 FR 1653807 (71) Applicant (s):

GUILLOT INDUSTRIE 01190, PONT DEVAUX France (72) Inventor (s):

MIASIK Didier

01380 BAGE-LA-VILLE

France (54) SANITARY HOT WATER STORAGE DEVICE (57) The subject of the invention is a device for; s domestic hot water storage, including a *>

storage tank and an access hatch to the storage tank, characterized in that said access hatch is provided with a reduction means and _s A j for orienting the speed of a flow of water intended at i ', f supply water to the storage tank. , i ?!

Or?·.

BE2017 / 5272

SANITARY HOT WATER STORAGE DEVICE

The subject of the invention is a device for storing domestic hot water.

Typically, a domestic hot water storage device includes a water storage tank and a storage tank access door.

In known manner, the hatch makes it possible, during a device manufacturing process, to apply a suitable coating to an interior surface of the water storage tank.

In such a storage device, it is essential to ensure a thermal stratification of the water contained in the storage device since the thermal stratification of the water ensures a reduction in the energy to be supplied for heating the water.

By thermal stratification is meant the distribution of water into horizontal strata or layers, each layer corresponding to a given temperature.

Due to the natural thermal stratification of water, hot water occupies a higher level in the tank, while cold water occupies the bottom of the tank.

Thus, to benefit from this natural distribution of water, in the so-called drawing phase, the reservoir is supplied at the bottom with cold water, and the hot water is taken at the top; and, in the so-called loading phase, cold water is taken from the lower part and the upper part is supplied with hot water.

However, to optimize stratification, avoid internal movement of water in the tank.

However, cold water or hot water enters the tank via a nozzle with a given speed, and penetrates deep into the tank possibly up to layers of lukewarm water, which inevitably causes mixing of water.

This results in a significant increase in the energy required to heat the entire volume of water to a desired temperature, due to a loss of performance of a heat generator.

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The object of the invention is to remedy the aforementioned drawbacks.

To this end, the subject of the invention is a device for storing domestic hot water, comprising a storage tank and an access hatch to the storage tank, characterized in that said access hatch is provided with a means for reducing and orienting the speed of a water flow intended to supply water to the storage tank.

Thanks to the device according to the present invention, it is possible to optimize the stratification in the storage tank, since the speed reduction and orientation means breaks the speed of the flow of water entering the storage tank, this which prevents any mixing of water in the storage tank and preserves the thermal differentiation of the water layers.

In addition, the device according to the present invention comes from a simple manufacturing process, since a surface treatment (for example against corrosion and / or to ensure the compatibility of the storage device with food) can be applied independently to the tank on the one hand and by means of speed reduction and orientation on the other.

In addition, the device according to the present invention is modular, insofar as the specific structure of the speed reduction and orientation means is advantageously chosen before it is secured to said hatch.

According to another characteristic of the invention, the hatch is arranged in one end of the storage tank forming the bottom of the storage tank, the speed reduction and orientation means being arranged projecting from the hatch in the storage tank, in the center of the bottom of the storage tank.

According to another characteristic of the invention, the device comprises a second access hatch to the storage tank.

According to another characteristic of the invention, the second hatch is provided with means for reducing and orienting the speed of a flow of water intended to supply water to the storage tank.

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According to another characteristic of the invention, the second hatch is arranged in an opposite end of the bottom of the storage tank forming the top of the storage tank, the speed reduction and orientation means being arranged projecting from the hatch in the storage tank, in the center of said upper part.

According to another characteristic of the invention, the device comprises a rod comprising a first end secured to the second hatch and a second end secured to the speed reduction and orientation means, and the length of which preferably depends on a power and / or a flow rate of a heat generator of the storage device.

According to another characteristic of the invention, the means or at least one of the speed reduction and orientation means is a deflector.

According to another characteristic of the invention, the means or at least one of the speed reduction and orientation means comprises a main body comprising a plurality of water outlet holes outside the main body.

According to another characteristic of the invention, the main body comprises two water inlets in the speed reduction and orientation means, one of the two inlets being configured to be connected to a branch called the loop return d '' a collective sanitary hot water installation.

According to another characteristic of the invention, the device comprises a water heating generator and a heat exchanger between a flow of water from the tank and another fluid.

The invention also relates to a domestic hot water installation of a plurality of premises, comprising a storage device as described above, comprising a branch for supplying domestic hot water to each premises and a return branch of domestic hot water from each room to the storage tank, called the return branch, one of the two inlets of the main body forming the end of the return branch.

The invention also relates to a method of manufacturing a storage device as described above, comprising a step of processing

BE2017 / 5272 surface of the storage tank and a surface treatment step of said at least one speed reduction and orientation means, independent of the surface treatment step of the storage tank.

Other characteristics and advantages of the invention will become apparent on reading the description which follows. This is purely illustrative and should be read in conjunction with the accompanying drawings in which:

- Figure 1 is a schematic view in longitudinal section of a storage device according to the present invention;

- Figure 2 is a detailed perspective view of a bottom of a storage io tank of the storage device of Figure 1;

- Figure 3 is a detailed perspective view of an exterior of the bottom of Figure 2;

- Figure 4 is a detail view in longitudinal section of a top of the device of Figure 1 according to an alternative embodiment;

- Figure 5 is a detail view in longitudinal section of a bottom of the device of Figure 1 according to an alternative embodiment;

- Figure 6 is a perspective view of a speed reduction and orientation means of a water flow of Figure 1;

- Figure 7 is a perspective view of a speed reduction and orientation means of a water flow according to a variant;

- Figures 8a and 8b are results of simulation of a thermal distribution of the device of Figure 1, a speed reduction and orientation means having respectively 12 holes and 24 holes, for a flow rate of 96L / min ;

- Figure 9 is a result of simulation of a thermal distribution of the device of Figure 1, a speed reduction and orientation means having 24 holes for a flow rate of 45 L / min;

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- Figures 10 and 11 illustrate a time evolution of a temperature in the lower and middle part of the storage tank of Figure 1, in comparison with a time evolution according to the prior art;

- Figure 12 illustrates connections of a collective installation comprising the storage device of Figure 1; and

- Figure 13 illustrates a speed reduction and orientation means according to a variant particularly suitable for the installation of Figure 12.

Water storage device

The invention relates to a device for storing domestic hot water, io referenced 1 in the figures.

As visible in the figures, the device 1 comprises a water storage tank 2 and at least one access hatch to the storage tank 2.

Preferably, the storage tank 2 has a generally cylindrical shape.

In the illustrated embodiment, the tank 2 comprises first and second hatches 3, 4.

The first hatch 3 is disposed in a first end of the tank 2 forming the internal bottom 5 of the storage tank.

The second hatch 4 is disposed in an opposite end of the bottom 5 and 20 forming the top 6 of the tank 2.

As more particularly visible in FIGS. 1 to 3, each access hatch 3, 4 is provided with means for reducing and orienting the speed of a flow of water intended to supply water to the storage tank 2 , and referenced respectively 7, 8.

As can be seen from FIG. 2, the means 7 protrudes from the first hatch 3 in the storage tank 2, preferably at the center 9 of the bottom 5 of the storage tank 2.

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Similarly, the means 8 protrudes from the second hatch 4 in the tank 2, preferably at the center 10 of the top 6 of the storage tank 2.

Advantageously, the reservoir 2 is supplied with cold water via the means 7.

Advantageously, the reservoir 2 is supplied with hot water by means of the means 8.

As shown in Figure 1, the storage device 1 also includes a heat exchanger 11 for heating the water in the tank 2 via heat exchange with a second fluid.

The second fluid is itself heated by a generator 12, such as a boiler, a heat pump or solar panels.

The second fluid can be water.

The storage device 1 comprises a branch 13 for supplying cold water from a connection 14 from the tank 2 to the heat exchanger 11.

The storage device 1 also comprises a branch 15 for supplying hot water from the heat exchanger 11 to a nozzle 16 connected to the means 8.

Advantageously, the device comprises pumps for circulating water in one of the branches, 13 or 15, not shown.

Tank 2 includes a tap 17 for entering cold water into the tank

2, connected to the reduction and orientation means 7.

As visible in FIG. 1, the outlet nozzle 17 is arranged in the lower part of the tank 2.

The tank 2 comprises a nozzle 18 for leaving hot water out of the tank 2.

As visible in FIG. 1, the outlet nozzle 18 is disposed in the upper part of the tank 2.

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The tap 18 is advantageously placed on the hatch 4.

It is noted that the tank 2 contains water which is naturally stratified, that is to say that the water is distributed in the tank 2 in layers of different temperatures, a coldest layer of water being placed on the bottom 5 and a hottest layer of water being disposed at the top of the tank 2.

Cold water means water from the coldest layer of water.

The cold water is for example at 10 ° C.

By hot water is meant water from the hottest layer.

The hot water is for example at 60 ° C.

io Circulation of water in the storage device

In drawing, that is to say when the heating device 1 supplies a room with hot water, a flow of hot water leaves the tank 2 by the outlet nozzle 18.

At the same time, a flow of cold water F penetrates into the bottom of the tank 2 by means 7.

The speed reduction and orientation means 7 markedly reduces the speed of the cold water, as will be explained later, which ensures optimization of the stratification of the water contained in the tank 2.

Under load, that is to say in heating mode, part of the cold water is taken from the tank 2 by the nozzle 14 and circulates successively in the branch 13 then the heat exchanger 11, where the water is heated by the second fluid.

The inlet nozzle 14 is advantageously disposed on the hatch 3.

Then, the heated water circulates in the branch 15 before entering the tank 2 by means 8 via the nozzle 16.

The speed reduction and orientation means 8 significantly reduces the speed of the hot water, as will be explained later, which ensures optimization of the stratification of the water contained in the tank 2.

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According to a variant illustrated in Figure 4, the outlet nozzle 18 can advantageously be arranged on a flange 22, described below.

According to another variant illustrated in FIG. 5, the tap 14 is separate from the flange 22.

Speed reduction and orientation means

According to a preferred variant, illustrated in FIGS. 1 to 6, the speed reduction and orientation means 7 and 8 each comprise a main body 20 comprising a plurality of water outlet holes outside the main body, referenced 21.

As more particularly visible in FIG. 6, the main body 20 is a ferrule, whose longitudinal axis is preferably vertical.

The ferrule 20 is preferably welded to a flange 22 bolted to the associated hatch 3, 4.

The flange 22 has a general shape of a crown.

It can be seen that, seen from the outside, only the taps 14, 17 and the flange 22 are visible from outside the tank 2.

As visible in FIG. 6, the holes 21 are arranged on a side wall 23 of the ferrule 20.

The wall 23 is delimited between the flange 22 and a disc 24 opposite the disc 22.

The holes 21 of the ferrule 20 constitute the only water outlet passages outside the inlet nozzle 16, 17.

Due to the presence of a multitude of holes 21, a flow F entering the means 7 is converted into a multitude of flows f leaving the means 7.

Because the holes 21 are arranged laterally, the flows f leaving the shell 25 form a non-zero angle with the longitudinal direction L of the shell 20.

The means 7, 8 are placed in the tank 2 so that the longitudinal direction L of the ferrules 20 coincide with the longitudinal axis Z of the tank 2.

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The flows f also form a non-zero angle with the direction of the longitudinal axis Z of the tank 2, which makes it possible to prevent the water from going longitudinally in the tank 2 and entering the successive layers of the stratification.

The total section of the holes 21 is adjusted to limit the speed of the water leaving the shell 20.

In FIG. 2, it can be seen that the means 7 of the bottom of the tank 2 is arranged so that the edge 24 is closest to the bottom 5 of the tank 2.

It is however possible that the reduction and orientation means comprise a rod secured to the ferrule 20.

This variant is particularly advantageous for the means 8 mounted in the upper part of the tank 2.

As can be seen in FIG. 1, the rod 25 comprises a first end 26 secured to the second hatch 4 and a second end 27 secured to the ferrule 20.

The rod 25 extends longitudinally along the tank 2, in a direction coinciding with the longitudinal axis Z of the tank 2.

The length of the cane 25 is chosen so as to make the water penetrate into the tank 2 via the means 8 in a layer of water whose temperature is not too high, so as not to disturb the volume of water. hot available above 20 means 8.

The length depends in particular on a power and a flow rate of the generator 12.

According to a variant illustrated in FIG. 7, the speed reduction and orientation means is a deflector 28.

The deflector 28 comprises a wall 29 for deflecting the flow of water entering the means 7, which makes it possible both to reduce the speed of the flow of water F entering and to orient the flow F into a flow F 'for prevent it from penetrating deep into the tank 2.

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Simulation results

The results of Figures 8a and 8b illustrate a thermal distribution in the tank 2 after 60s of a load of the tank 2 in cold water, the ferrule 20 being provided with 12 holes and 24 holes respectively.

The water flow rate is 96 L / min (1.6 * 10 ^_3 m ³ / s).

As can be seen in FIG. 8a, the coldest water flows along the bottom 5 and on the lateral edges 30 of the tank 2.

Due to the presence of the holes 21 on the side wall of the shell 20, no jet of cold water is emitted longitudinally along the Z axis.

io As is clear from FIG. 8a, the stratification of the tank is not modified by the arrival of cold water, since the cold water is directed only in the lower part of the tank 2.

As shown in Figure 8b, we see that the stratification is not disturbed by the cold water load.

Because the shell has twice as many holes as for the embodiment of FIG. 8a, the stratification is even better, the mixture of hot water and cold water being even weaker than in FIG. 8a.

Thus, it is clear from the comparison of FIGS. 8a and 8b that, depending on the configuration of the means 7, 8, in particular according to the arrangement, the area and the number of holes, the storage device 1 adapts to the use we wish to make of it.

In other words, the storage device 1 is modular according to the desired use.

The results of FIG. 9 illustrate a thermal distribution in the tank 2 after 60 s of load, the shell being provided with 24 holes.

The water flow is 45 L / min (0.75 * 10 ^_3 m ³ / s).

As shown in Figure 9, for a flow rate of 45 L / min (0.75 * 10 ^_3 m ³ / s), the 24-hole ferrule ensures better distribution of hot and cold water.

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However, for a lower flow rate, for example of the order of 10 L / min (0.16 * 10 ^_3 m ³ / s), the 24-hole ferrule and the 12-hole ferrule can lead to the same volume of hot water, according to the defined heating time.

Experimental results

FIG. 10 illustrates a curve 81 of the time course of an ideal temperature at the bottom of the tank 2.

FIG. 10 also illustrates a curve 82 of the time course of a real temperature at the bottom of the tank 2 of the prior art, without means of reduction and orientation.

FIG. 10 also illustrates a curve 83 of the time course of a real temperature at the bottom of the tank 2 of the storage device of FIG. 1.

As can be seen in FIG. 10, the ideal curve 81 is a constant temperature at 10 ° C from 6 p.m.

From 6 p.m., curve 83 is almost constant, at an average temperature of around 14 ° C.

From 6 p.m., curve 82 describes more changes, for an average temperature above 20 ° C.

Thus, the curve 83 is much closer to the ideal curve 81 than the curve 82.

FIG. 11 illustrates a curve 91 of the evolution over time of an ideal temperature at mid-height of the reservoir 2.

FIG. 11 also illustrates a curve 92 of temporal evolution of an actual temperature at mid-height of the tank 2 of the prior art, without means of reduction and orientation.

FIG. 11 also illustrates a curve 93 of the temporal evolution of an actual temperature at mid-height of the tank 2 of the storage device of FIG. 1.

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As shown in Figure 11, the ideal curve 91 is a constant temperature at 10 ° C between 7 p.m. and 6 a.m., followed by two water charges at 65 ° C between 7 a.m. and 8 a.m. and then between 8 a.m. and 8:30 a.m.

As is clear from the evolution over time, the curve 93 is much closer to the ideal curve 91 than the curve 92.

Collective installation

As shown in FIG. 12, the storage device 1 equips a collective hot water installation 100.

The installation 100 supplies hot water to a plurality of premises, such as apartments.

As visible in FIG. 12, the installation 100 comprises a branch 101 for supplying domestic hot water to each room 104 and a branch 102 for returning domestic hot water from each room 104 to the tank 2, called the branch return.

Variant of realization

As can be seen in FIG. 13, the storage device 1 advantageously comprises a stratification rod 120.

The stratification rod 120 is coaxial with the shell 20 of the means 7 disposed at the bottom 5 of the tank 2.

The rod 120 is screwed onto the nozzle 121 which passes through the speed reduction and orientation means.

Advantageously, the stratification rod 120 extends longitudinally along the axis Z of the tank 2.

The water from the return branch flows into the stratification rod 120.

The laminating rod 120 comprises a plurality of holes 122 arranged one above the other.

Each hole has a hole shutter valve.

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The laminating rod 120 is configured to allow the opening of only one hole at a time.

Because the rod 120 extends longitudinally in the tank 2, the holes 121 are arranged in the successive thermal layers.

The open hole 121 is the one immersed in the water layer of the tank 2, the temperature of which is closest to the temperature of the water in the return branch.

This variant makes it possible to further optimize the stratification in the tank 2 vis-à-vis the loop return.

io Manufacturing process

The subject of the invention is also a method of manufacturing the storage device 1 comprising a step of surface treatment of the storage tank 2 and a step of surface treatment of the speed reduction and orientation means, 7, 8, this step being independent of the surface treatment step of the storage tank.

The surface treatment is advantageously a coating against corrosion and / or a coating to make the device 1 compatible with food or sanitary liquids.

For example, the surface coating of the tank 2 may be an enamel, while the material of the means 7, 8 may be stainless steel.

The method of manufacturing the storage device 1 is therefore simple, since several separate steps allow suitable treatment of the reservoir on the one hand and the means 7, 8 on the other hand.

BE2017 / 5272

Claims (12)

1. Sanitary hot water storage device, comprising a storage tank (2) and a hatch (3, 4) for access to the storage tank (2), characterized in that said access hatch (3) is provided with a means of 5 reduction and speed orientation (7) of a water flow intended to supply water to the storage tank (2). 2. Storage device according to claim 1, in which the hatch (3) is arranged in one end of the storage tank forming the bottom (5) of the storage tank (2), the speed reduction and orientation means ( 7, 8) io being projecting from the hatch in the storage tank, in the center (9) of the bottom (5) of the storage tank. 3. Storage device according to one of claims 1 or 2, comprising a second hatch (4) for access to the storage tank. 4. Storage device according to the preceding claim, in which the second hatch (4) is provided with means for reducing and orienting the speed of a flow of water intended to supply water to the storage tank. 5. Storage device according to one of claims 3 or 4, wherein the second hatch (4) is disposed in an opposite end of the bottom of the storage tank forming top (6) of the storage tank (2), the means 20 speed reduction and orientation (8) being arranged projecting from the hatch (4) in the storage tank (2), in the center of said top. 6. Storage device according to one of claims 4 or 5, comprising a rod (25) comprising a first end (26) secured to the second door (4) and a second end (27) secured to the means of 25 speed reduction and orientation (8). 7. Storage device according to one of claims 1 to 6, wherein the means or at least one of the speed reduction and orientation means (7, 8) is a deflector (28). BE2017 / 5272 8. Storage device according to one of claims 1 to 7, wherein the means or at least one of the speed reduction and orientation means comprises a main body (20) having a plurality of holes (21) water outlet from the main body (20). 5 9. Storage device according to the preceding claim, wherein the main body comprises two water inlets in the speed reduction and orientation means, one of the two inlets being configured to be connected to a so-called return branch. loop of a collective domestic hot water installation. io 10. Storage device according to any one of the preceding claims, comprising a water heating generator (12) and a heat exchanger (11) between a flow of water from the tank and another fluid. 11. Installation of sanitary hot water of a plurality of premises, provided with the storage device according to claim 9, comprising a branch (101) 15 for supplying domestic hot water to each room and a branch (102) for returning domestic hot water from each room to the storage tank, called return branch, one (103) of the two inlets of the body main forming end of the return branch. 12. Method of manufacturing a storage device according to one of 20 claims 1 to 10, comprising a step of surface treatment of the storage tank (2) and a step of surface treatment of said at least one speed reduction and orientation means (7, 8), independent of the surface treatment step of the storage tank. BE2017 / 5272 BE2017 / 5272 γ BE2017 / 5272 BE2017 / 5272 BE2017 / 5272 îgfî's 5 ^ 6 5ν ·> Ké5 hl ε & r3is * SGi l'i MCJei & rt H 4% ÎÔHH 's ΗΆ dOvX'K'V? hYf / YYxun (13 ^ ÛX '* 0G? (Α ^- ? W 'S5. \ Ä * 0ö? * ^ ûxss * xu ^! C 'ïüïfnsjÎXSUsi © W "p O Y & OXYXrt hr 5 S & Os-Qöl X? br 3 5; j (Ss' \ i> 01 ~ 55 ^ * 001 © Öe ^ l Λ *> rr O -s --V-- -. a w> '* \ k \ J ΥΥΛ Υ'ΧΧ ί, Ζ 'ΥΥ' ” Y & ehsX '' L, i ο ..........: ίί 3.SSÔ (m j .... Υ'ΐ ----- »» »« Μ »- x '// χΥΥ 1 X Ο. Y1Y V .. 'ϊ ^ \? Υ ^χ > \\\ \\ \ Υ BE2017 / 5272 * ·? Τ ^! 'p3 · on temp Η 8 çtfi V, -? '1 ra BE2017 / 5272 iW »$ 33« röa i i (S 8 S i i i S BE2017 / 5272 S03 ®U3nw J. I .................... I j [j ...................... ί .. ................ W g S ® B £ R a 2 <□,} s ^ Ssp BE2017 / 5272 BE2017 / 5272 122 BE2017 / 5272 SANITARY HOT WATER STORAGE DEVICE The subject of the invention is a device for storing domestic hot water, comprising a storage tank and an access hatch to the storage tank, characterized in that said access hatch is provided with a reduction means and speed orientation of a water flow intended to supply water to the storage tank.