JPH01285726A - Heat pipe type heat accumulating water tank device - Google Patents

Abstract

PURPOSE:To drip condensed liquid produced by upper heat transfer tubes uniformly into a plurality of heat exchanging tubes by a method wherein a condensed liquid dripping unit such as green parts, discontinuous projections or the like is provided on the outer surface of the upper heat transfer tube with a space shorter than the arranging pitch of the heat exchanging tubes while projections or choked parts are provided on the inner surface of the upper sheath tube at positions before and after the heat exchanging tubes in accordance with necessity. CONSTITUTION:Condensed liquid 3g stops the lateral running thereof at the end of a condensed liquid dripping unit 5 and can be dripped at the end of the condensed liquid dripping unit 5. Since an upper sheath tube 3b is provided with projections or choked parts 6, the condensed liquid 3g dripped out of an upper heat transfer tube 3a can be guided into heat exchanging tubes 3e. Accordingly, the condensed liquid 3g produced by the upper heat transfer tubes 3a may be dripped uniformly into the heat exchanging tubes 3e while the production of ice 7 may be uniformized in accordance with the uniform dripping of the condensed liquid 3g.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a heat pipe type heat storage water tank device, and in particular, improves heat exchange performance by uniformly dripping condensate generated from an upper heat exchange tube onto a plurality of heat exchange tubes. This invention relates to a heat pipe type heat storage water tank device with improved properties.

(Prior art) In air conditioning systems for heating and cooling, there is a heat pipe type heat storage water tank device, for example, as a conventional heat storage water tank device that utilizes the latent heat or sensible heat of water. In this system, as shown in Figure 4(a), the heat siphon heat exchanger 3 is submerged in water (not shown), and during ice storage, a sheath placed on top The refrigerant is evaporated in the heat exchanger tube 3a in the tube 3b, the surface of the heat exchanger tube 3a is cooled, the working fluid in the sheath tube 3b is condensed as shown by 3g, and the condensed working fluid is brought into contact with the heat exchange tube 3e through which it passes. Freezes the water.Also, when storing hot water, the refrigerant is condensed in the heat transfer tube in the sheath tube that passes through the working fluid in the lower part, thereby evaporating the working fluid in the sheath tube. Heats the water it comes into contact with. In this way, cooling water heat storage (latent heat utilization) and heating hot water heat storage (sensible heat utilization) are efficiently performed by the heat siphon heat exchanger in one heat storage water tank.

[Problem to be solved by the invention]

However, according to the conventional heat pipe type heat storage water tank device,
Due to non-uniform evaporation conditions on the refrigerant side, dimensional errors during manufacturing, etc., the amount of condensed liquid 3g dripped through the plurality of heat transfer tubes 3e is different (FIG. 4(a)). Moreover, as shown in FIG. 4(b), when the heat exchanger tubes are tilted due to their own weight, the dripping position and amount of the condensate 3g generated from the upper heat exchanger tubes 3a become uneven, and the amount of dripping to each heat exchanger tube 3e becomes uneven. There is a disadvantage that the liquid returns unevenly. Therefore, as shown in FIG. 5, a part of the inner surface of the heat exchange tube 3e dries out,
There may be heat exchange tubes 3e in which no ice 7 is generated, or ice 7
The thickness becomes uneven. This results in a significant reduction in the efficiency of the entire system.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a heat pipe type heat storage water tank device in which condensed liquid from an upper heat exchanger tube is uniformly dripped into a plurality of heat exchange tubes.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention provides condensate droplets such as unprocessed parts or discontinuous protrusions on the outer surface of the upper heat exchanger tube at intervals equal to or less than the arrangement pitch of the heat exchange tubes, and To provide a heat pipe type heat storage water tank device in which projections or constrictions are provided on the inner surface of an upper sheath tube at positions before and after a heat exchange tube.

That is, the heat pipe type heat storage water tank device of the present invention is provided underwater in the heat storage water tank, pools the working fluid in the lower part, accommodates the vapor of the working fluid, and has a protrusion or a constriction part in the upper part as necessary. a closed container, an upper heat exchanger tube that passes through the upper part of the closed container and passes through the steam, and has condensate droplets such as unprocessed parts or discontinuous protrusions on the outer surface at a predetermined pitch; and the closed container. and a refrigeration cycle means connected to the upper heat transfer tube during ice storage and to the lower heat transfer tube during hot water storage. The protrusion or constriction part provided on the upper part of the sealed container is provided before and after a plurality of heat exchange tubes interposed between the upper heat exchanger tube and the lower heat exchanger tube, and is provided on the outer surface of the upper heat exchanger tube. The condensate dripping portions are provided at intervals equal to or less than the piping pitch of the heat exchange tubes. This condensate dripping portion prevents the condensate generated on the surface of the upper heat exchanger tube from running sideways on the surface of the upper heat exchanger tube, and makes the condensate drip uniformly onto the plurality of heat exchange tubes. Furthermore, the protrusion or constriction provided at the top of the closed container guides the dripped condensate to the plurality of heat exchange tubes, thereby achieving more uniform dripping to the plurality of heat exchange tubes. This type of heat pipe type heat storage water tank device is
During ice storage, brine at a temperature of 0°C or lower is passed through the upper heat exchanger tube, or the refrigerant is passed through the upper heat exchanger tube from the refrigeration cycle means to evaporate at a temperature below O'C. A condenser is constructed by flowing a heat medium at a predetermined temperature into the lower heat transfer tube, or by flowing a refrigerant from the refrigeration cycle means.

〔Example〕

Hereinafter, the heat pipe type heat storage water tank device of the present invention will be explained in detail.

1(a), (b) and FIG. 2 show an embodiment of the present invention, in which a heat storage water tank l filled with heat transfer water 2 and a heat siphon type heat sink submerged in the heat storage water tank 1 are shown. exchanger 3,
Compressor 4a, heat exchanger (operates as a condenser during ice storage and as an evaporator during hot water storage) 4b,
It is composed of a refrigeration cycle 4 consisting of an expansion valve 4c and piping 4d.

As shown in the cross-sectional view of FIG. 1 et al., the heat siphon heat exchanger 3 includes an upper sheath tube 3b having an upper heat exchanger tube 3a therein, a lower sheath tube 3d having a lower heat exchanger tube 3C therein, A plurality of heat exchange tubes 3e connecting the upper sheath tube 3b and the lower sheath tube 3d form one sealed space, and a working fluid 3f (liquid and vapor) such as fluorocarbon is contained in the sealed space.
is included. Also, as will be described later in FIG. 3,
On the outer surface of the upper heat exchanger tube 3a, a large number of condensate droplets such as unprocessed parts or discontinuous protrusions are provided at regular intervals below the arrangement pitch of the plurality of heat exchange tubes 3e.
Projections or constricted portions are provided on the inner surface of b as required before and behind the plurality of heat exchange tubes 3e.

FIG. 3 shows the dripping state of 3 g of condensate generated from the heat siphon type heat exchanger and the upper heat exchanger tube 3a, and shows the dripping state of 3 g of condensate generated from the heat siphon type heat exchanger 3 and the upper heat exchanger tube 3a of the heat siphon type heat exchanger 3 submerged in the heat transfer water 2. The outer surface is formed with a condensate dripping part 5 such as an unprocessed part or a discontinuous protrusion, and a plurality of heat exchange tubes 3e.
A large number of them are provided at intervals of 1,000 P or less. Further, on the inner surface of the upper sheath tube 3b, protrusions or constricted portions 6 are provided near the front and back of the plurality of heat exchange tubes 3e. Since the condensate dripping portion 5 is provided on the outer surface of the upper heat transfer tube 3a in this manner, even if the heat siphon heat exchanger 3 is tilted, it is possible to prevent the condensate 3g from running sideways. That is,
The condensed liquid 3g can stop running horizontally at the end of the condensed liquid dripping part 5, and be allowed to drip at that position. Moreover, since the upper sheath tube 3b is provided with the protrusion or constriction portion 6, the condensed liquid 3g dripping from the upper heat exchanger tube 3a can be guided to the heat exchange tube 3e. Therefore, the condensed liquid 3g generated from the upper heat exchanger tube 3a can be uniformly dropped into the heat exchange tube 3e, and accordingly, the ice 7 can be generated uniformly.

In the above configuration, (1) operation during ice heat storage and (2) operation during hot water heat storage will be explained using FIGS. 1(a) and (b), FIGS. 2 and 3, respectively.

■Operation during ice heat storage During ice heat storage, compressor 4a, heat exchanger 4b (
In this case, it operates as a condenser), an expansion valve 4c,
The refrigeration cycle 4 consisting of the piping 4d is shown in FIG.
), and is connected to the upper heat transfer tube 3a of the heat siphon heat exchanger 3. At this time, the upper heat exchanger tube 3a operates as an evaporator of the refrigeration cycle 4. On the other hand, the lower heat exchanger tube 3c is closed by a closing means (not shown) and separated from the refrigeration cycle 4.

In this state, the high temperature refrigerant gas compressed by the compressor 4a of the refrigeration cycle 4 is guided to the heat exchanger 4b,
Here, it comes into contact with the atmosphere and is cooled and condensed. This condensed refrigerant gas is sent to the upper heat transfer tube 3a of the heat siphon heat exchanger 3 via the expansion valve 4c.

At this time, the upper heat exchanger tube 3a acts as an evaporator, and the refrigerant gas takes vaporization heat from the surface of the upper heat exchanger tube 3a and evaporates. On the other hand, the working fluid 3 evaporated due to the heat of water 2.
is condensed through heat exchange around the upper heat exchanger tube 3a and upper sheath tube 3b. At this time, as shown in Fig. 3, the condensate 3
The condensate drips at the end of the condensate dripping part 5 provided on the outer surface of the upper heat exchanger tube 3a, and is prevented from running sideways, and the condensate drips at the end of the condensate dripping portion 5 provided on the outer surface of the upper heat exchanger tube 3a, and is heated by a projection or constriction portion 6 provided on the inner surface of the upper sheath tube 3b. It is guided to the exchange tube 3e. Therefore, the condensed liquid 3g drops uniformly into the plurality of heat exchange tubes 3e. At this time, water around the heat exchange tube 3e is cooled and ice 7 is generated. In this case, since the condensed liquid 3g returns evenly to the plurality of heat exchange tubes 3e, the generation of ice 7 in each heat exchange tube 3e, that is, the thickness of the generated ice becomes uniform, and the heat siphon type heat exchanger 3 heat exchange is performed efficiently.

■Operation during hot water heat storage During hot water heat storage, the compressor 4a.

The refrigeration cycle 4, which consists of a heat exchanger 4b (in this case, operates as an evaporator), an expansion valve 4C1, and piping 4d, is piped as shown in FIG. is connected with. At this time, the lower heat exchanger tube 3c operates as a condenser of the refrigeration cycle 4. On the other hand, the upper heat exchanger tube 3a is closed by a closing means (not shown) and separated from the refrigeration cycle 4. In this state, the refrigerant supplied from the refrigeration cycle 4 condenses in the lower heat exchanger tube 3C, and the condensation causes the working fluid 3r to evaporate, and is cooled by water 2 through the heat exchange tube 3C and condensed. In other words, the water 2 is heated via the heat exchange tube 3e. At this time, the lower heat exchanger tube 3 is placed below the heat exchanger tube 3e.
Since C (heat supply source) is located, the bottom heat mode is set and heat exchange in the heat siphon type heat exchanger 3 is performed efficiently.

In this embodiment, the refrigeration cycle 4 is connected to the compressor 4.
a, a heat exchange pipe 4b, an expansion valve 4c, and a pipe 4d, but there is no particular limitation as long as it performs the same function. It may be possible to flow brine or the like at a temperature of 200 to 3000. Piping switching during ice heat storage and hot water heat storage can be easily performed by providing appropriate means.

A plurality of heat siphon heat exchangers 3 may be used in series or in parallel depending on the size of the heat storage water tank 1.
It is also possible to use the lower heat exchanger tubes 3a, 3c in a horizontal state, with the entire structure tilted.

Both the upper heat exchanger tube 3a and the lower heat exchanger tube 3c condense or evaporate the working fluid 3f-t on their outer surfaces, and further effects can be expected by applying high-performance heat transfer surface processing.

[Effects of the Invention] As explained above, according to the heat pipe type heat storage water tank device of the present invention, the condensate dripping portion, such as unprocessed parts or discontinuous protrusions, on the outer surface of the upper heat exchanger tube is set to be smaller than the piping pitch of the heat exchanger tube. , and if necessary, protrusions or constrictions were provided on the inner surface of the upper sheath tube at the front and rear positions of the heat exchange tubes, so that the condensate from the upper heat exchanger tube can be distributed uniformly to the multiple heat exchange tubes. The performance difference between each heat exchange tube can be reduced, and the performance of the entire heat siphon heat exchanger can be improved.

[Brief explanation of the drawing]

FIG. 1(a) is an explanatory diagram showing the state during ice heat storage according to an embodiment of the present invention, FIG. 1(t)) is a sectional view of FIG. 1(a), and FIG. An explanatory diagram showing the state during heat storage, Fig. 3 is an explanatory diagram showing the dripping state of condensate generated from the upper heat exchanger tube of the present invention, and Fig. 4 (a) [Yes]) is an explanatory diagram showing the state of condensate dripping from the upper heat transfer tube of the present invention. FIG. 5 is an explanatory diagram showing an upper heat exchanger tube of a heat exchanger, and FIG. 5 is an explanatory diagram showing a conventional heat siphon type heat exchanger. Explanation of symbols 1...---11---- Heat storage water tank 2-1---
-・・Water 3・・・・・・Heat siphon type heat exchanger 3a・・・−・−・・Upper heat transfer tube 3b・・・
--- Upper sheath tube 3C----m---Lower heat exchanger tube 3d
・・−m−−−・−Lower sheath tube 3e−・−−m−・
-Heat exchange tube 3f...---111...3g of working fluid
・・−・・・・・−・・凝縮液４−・−一一一一・・冷凍サイクル４ ａ−−−・−コンプレッサ４ｂ−・−・・・・・・熱交換器 ４ ｃ −− -1.-Expansion valve 4d--m--Piping 5--Condensate dripping part 6--Protrusion or constriction part 7-- ---One ice

Claims (2)

[Claims] (1) In a heat storage water tank device that utilizes sensible heat and/or latent heat of water in a heat storage water tank, a heat storage tank is provided in the water of the heat storage tank, pools the working fluid in the lower part, and stores the steam in the upper part, and as needed. A closed container having a protrusion or a constriction on the inner surface of the upper part according to the requirements; and a condensate dripping part that passes through the upper part of the closed container and passes through the steam, and has an unprocessed part or discontinuous protrusions on the outer surface. an upper heat exchanger tube having a predetermined pitch at a predetermined pitch; a lower heat exchanger tube that penetrates the lower part of the closed container and passes through the working fluid; a lower heat exchanger tube that is connected to the upper heat exchanger tube during ice heat storage and is connected to the lower heat transfer tube during hot water heat storage; A refrigeration cycle means connected to the heat tube is provided, and during ice storage, brine at a temperature of 0°C or lower is flowed into the upper heat exchanger tube, or a refrigerant is flowed from the refrigeration cycle means to the upper heat exchanger tube to evaporate at a temperature of 0°C or lower. A heat pipe type heat storage water tank device, characterized in that when storing hot water, a heat medium at a predetermined temperature is passed through the lower heat transfer tube, or a refrigerant is flowed from the refrigeration cycle means to form a condenser. (2) The heat pipe type heat storage water tank device according to claim 1, wherein the condensate dripping portions such as unprocessed portions or discontinuous projections are provided at intervals equal to or less than an arrangement pitch of the heat exchange tubes. (2) The protrusion or constriction provided on the inner surface of the upper part of the sealed container is provided before and after the plurality of heat exchange tubes interposed between the upper heat exchanger tube and the lower heat exchanger tube, and drips from the upper heat exchanger tube. The heat pipe type heat storage water tank device according to claim 1, wherein the condensed liquid is guided to the heat exchange tube.