JPS6036557B2 - heat storage device - Google Patents

Description

[Detailed description of the invention] The present invention relates to improvements in heat storage devices.

FIG. 1 is a configuration diagram of a conventional heat storage device. A heat storage material 2 is contained in the heat storage tank 1, and a liquid 3 having a smaller specific weight is placed on top of the heat storage material 2. Bamboo heat material 2
A heater 5 is provided inside, and a cooler 4 is provided in the liquid 3.
As the liquid 3, for example, naphthalene C is used as the heat storage village 2.
, o ratio (freezing point: 80°C, specific weight: 1.16 m/ground), silicone oil (specific weight: 0.9
0 y/ear) and transformer oil (specific weight 0.86 y/ear) are used. The heater 5 is used to store heat by applying heat to the heat storage material 2, and solar heat, heated waste water, or the like is used as this heat. Naphthalene (solidification heat 35Kc) as heat storage material 2
When using a material that utilizes latent heat during solidification, such as al/k9), the heat storage village 2 gradually starts to separate from the vicinity of the heater 5, and then the convective heat transfer of the separated liquid heat storage material 2 starts. All remaining solid heat storage material is also separated. The cooler 4 is used to extract heat from the heat storage material 2 and use it for heating. An evaporative cooling medium such as fluorocarbon flows inside it. The cooler 4 is provided in the liquid 3 above the heat storage material 2, and heat is indirectly received by the heat storage material 2 through convective heat transfer of the liquid 3, so that even if the heat storage material 2 solidifies, the heat transfer efficiency does not deteriorate. Heating capacity does not deteriorate. In addition, in order to improve heat transfer efficiency, a liquid circulation device 6 such as a pump is used to
is sucked into the suction pipe 7 and ejected into the heat storage material 2 from the discharge pipe 8, so that catalytic heat is exchanged directly between the heat storage materials 2 and 2. The minute liquid 3' ejected into the heat storage material 2 comes into direct contact with the heat storage material 2, receives heat, and rises due to buoyancy, returns to the upper liquid 3, and releases the heat to the cooler 4. . However, this conventional heat storage device has the following drawbacks.

That is, when heat is applied to the solidified heat storage material 2 by the heater 5 to separate it, the solidified heat storage material remains in the end 8a of the discharge pipe 8 even after the heat storage material 2 is completely separated. The crystals 2 may not melt because they are in a narrow space, and therefore the liquid 3 may not be able to be ejected from the discharge pipe 8. If the end portion 8a of the discharge pipe 8 is installed at a location far away from the heater 5 and in a corner of the heat storage tank 1, crystals of the heat storage material 2 may clog inside the discharge pipe 8, causing the liquid 3 to It is said that it is almost impossible to make it erupt. An object of the present invention is to improve the above-mentioned conventional drawbacks and to maintain appropriate heat transfer efficiency to the cooler 4 by ejecting liquid from the discharge pipe section whenever desired.

FIG. 2 is a configuration diagram of an embodiment of the heat storage device of the present invention.

This is done by submerging a liquid 9, which has a specific weight heavier than the heat storage material 2 and which does not melt or solidify within the operating temperature range, in the lower part of the heating section 2, and the fabric part 8a of the discharge pipe 8 is installed in the liquid 9. The other details are the same as in Figure 1. As this liquid 9, naphthalene C as the heat storage village 2,
When using Niji 8 (specific weight 1.16), fluorocarbon CC12F-CCIF2 (specific weight 1.56) is used.
Good examples include mercury (specific weight 13.5 ta').
Since the end 8a of the discharge pipe 8 is always surrounded by the liquid 9, the heat storage material 2 will not enter and become clogged.
The minute liquid 3' spouted from the end 8a is the liquid 9 at the bottom.
It rises through the liquid heat storage material 2 due to buoyancy and reaches the liquid 3 at the top. 3 to 7 show other embodiments of the heat storage device of the present invention.

In the embodiment shown in FIG. 3, the liquid circulation device 6 is connected in the opposite direction so that the lower liquid 9 is ejected into the upper liquid 3, and the ejected minute liquid 9' is caused to fall in the heat storage material 2 by gravity. Heat is received by direct rut heat exchange between the two. After the heat released by the heat storage material 2 is transmitted to the liquid 9, when it is ejected into the liquid 3 from the discharge pipe 8 provided at the upper part, the liquid 3
It is transmitted inside and absorbed by the cooler 4. Further, in this embodiment, the heater 5 is installed in the liquid 9 at the bottom, but in this case, heat can be transferred by utilizing the wide contact interface between the heat storage material 2 and the liquid 9 by convection of the liquid 9. Therefore, the heat storage material 2 can be separated far away and the heat storage time can be shortened. Fourth
In the illustrated embodiment, a part of the heater 5 is installed in the heat storage village 2, and the remaining part is installed in the liquid 9 at the bottom. In this way, the solid heat storage material 2' is quickly separated by convective heat transfer of the liquid 9 and convective heat transfer of the liquid heat storage material 2 separated on the surface of the heater 5. The embodiment shown in FIG.
10 heat exchange chambers are provided in the middle of the suction pipe 7, and a cooler 4 and a heater 5 are provided inside this chamber.

In this way, the fan (not shown) used for the cooler 4 and the heater 5 can be used for both, and therefore the device can be made smaller, lighter, and less expensive. In addition, since the cooler 4 and heater 5 are installed in the narrow heat exchange chamber 10 and heat is transferred using forced convection of the liquid 3, the heat transfer resistance is lower than when they are installed in the liquid 3 or the liquid 9. becomes 4.
Therefore, the cooler 4 and heater 5 can be made smaller. Since the heater 5 is not in the lower liquid 9 and the natural convection heat transfer of the liquid 9 cannot be used when transferring heat to the heat storage material 2, the heat storage material 2
Suitable when is non-coagulable. That is, in this case, the micro liquid 3' is heated and stored while being ejected into the non-solidifying heat storage body 2. In addition, in the embodiment shown in FIG. 5 and the embodiment shown in FIG. 3, the cooler 4 and the heater 5 are installed in the liquid 3 and the liquid 9. It is also suitable for corrosive cases. The embodiment of FIG.
In the embodiment shown, a separate liquid circulation device 6', a discharge pipe 8
', a suction pipe 7' is provided to transfer the lower liquid 9 to the upper liquid 3.
The micro liquid 9' is ejected into the heat storage material 2 by gravity.
The inside was made to descend.

In this way, the minute liquid 3' rises through the liquid circulation device 6, while the minute liquid 9' rises through the liquid circulation device 6.
′, and as a result, the heat storage material 2 causes convection due to their movement, promoting convective heat transfer at the contact interface between the heat storage material 2 and the liquid 3 and the contact interface between the heat storage material 2 and the liquid 9. Heat transfer resistance is reduced. In other words, the catalytic heat exchange pond immediately after the minute liquids 3', 9' is formed in this embodiment, in which the above-mentioned heat transfer is also added and the overall efficiency is improved. In the embodiment shown in FIG. 7, instead of submerging the liquid 9 with a large specific weight in the lower part of the heat storage material 2, a plurality of liquid storage pipes 10, 10' for storing the liquid 9 are provided at appropriate locations on the heat storage material 2. Inside the ends 8a, 8 of the discharge pipes 8, 8'
a' is provided.

This has the advantage that the location where the heat storage material 2 solidifies can be easily selected. As explained above, according to the present invention, there is no possibility that the liquid discharge pipe is clogged with heat storage material crystals and the liquid is not ejected, and the heat transfer efficiency to the cooler can always be maintained at an appropriate level. .

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a conventional heat storage device, Fig. 2 is a block diagram of one embodiment of the heat storage device of the present invention, and Figs. 3 to 7 are block diagrams of other embodiments of the heat storage device of the present invention. It is. 1... Heat storage tank, 2... Heat storage material, 3, 9...
...liquid, 4...cooler, 5...heater, 6,6'...liquid circulation device. Figure / Figure Z Figure 3 Figure 4 Figure S Figure C Figure 7

Claims (1)

[Claims] 1. A liquid with a smaller specific weight is placed in the upper part of the heat storage material in the heat storage tank, and a liquid with a larger specific weight is submerged in the lower part of the heat storage material, and the upper liquid is mixed with the lower liquid by a liquid circulation device. A heat storage device characterized in that direct catalytic heat exchange is performed by injecting a lower liquid into a heat storage material through an upper liquid or by injecting a lower liquid into a heat storage material through an upper liquid.