JPS5836278B2 - Heat storage tank device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a heat storage tank device using a heat storage material that utilizes latent heat.

Due to the difficulty in securing a quantity of oil and the rising price, the energy supply and demand gap is widening, and the demand for effective use of energy is increasing.

Therefore, energy saving such as effective use of waste heat, solar heat,
The use of intermittent energy such as wind power is attracting attention.

However, these energy supplies and energy demands generally do not match in terms of time or quantity, and it is necessary to smooth the gap between energy demand and supply through heat storage.

For heat storage in 1, a heat exchanger is installed in a heat storage tank, and a heat storage material that uses sensible heat such as water or oil has been used. The amount of heat stored per unit is small, and the heat storage tank becomes large.

1.Things that utilize latent heat have a large amount of heat storage per volume, so
Although it is possible to make the heat storage tank smaller, it has the disadvantage of causing supercooling and slowing down the rate of heat input and output because the thermal conductivity of the casing is generally low.

The present invention has been made in view of the above circumstances, and uses a heat storage material that utilizes latent heat, does not require a heat exchanger in the heat storage tank, has a high heat input/output speed, and can downsize the heat storage tank. The purpose of the present invention is to provide an inexpensive heat storage tank device.

Next, to explain the outline of the heat storage tank device of the present invention, a heat storage material that utilizes latent heat, such as sodium thiosulfate that uses hydrated salt of calcium sulfate as an anti-supercooling agent, is enclosed in a flat capsule. A hole is made to communicate between the surface and the back side, a branch pipe with residue is made to protrude, and a nucleating agent is sealed therein.

The capsule is housed in the heat storage tank almost horizontally so that the heat medium flows along the outer surface of the capsule and through the communication hole of the capsule as a flow path.

The heat medium circulates through the external heating source and the heat radiation section to input and output heat to the capsule.

As the heat medium, for example, two types of heat medium with different specific gravities that do not cause a chemical reaction with each other and do not mix are used, and circulation distribution pipes are provided above and below the heat storage tank, and the heat medium is discharged into the heat storage tank through the communication holes of the distribution pipes. Heat is input and output to the capsule by direct heat exchange between the heat carriers.

However, two types of heat medium are not necessarily required, and only one type of heat medium may be used.

The heat demand will be explained below using an example of heating, but the principle is still the same for cooling, and in this case, a heat medium suitable for this is selected.

FIG. 1 schematically shows the outline of the present invention. Reference numeral 1 denotes a heat storage tank, which is insulated and has an upper pipe 2 and a lower pipe 3 disposed therein.

The heat medium 4 having a lower specific gravity is stored on top of the heat medium 5 having a higher specific gravity.

There is a space 6 in the upper part of the heat storage tank 1, which absorbs the thermal expansion of the heat medium.

The heat medium 4 passes through the external circulation path 8 by the pump 7, radiates heat to the heat demand section 9, is released into the heat storage tank through the many holes in the lower piping 3, and rises until the heat medium 5 and the heat medium 5 in FIG. It exchanges heat with a heat storage capsule (not shown), which will be described later.

The heated heat medium 5 passes through the external environment flow path 11 by the pump 10, receives heat from the heat supply source 12, is released into the heat storage tank through the many holes in the upper piping 2, and is transferred to the heat medium 4 and the heat medium 5 without descending. It exchanges heat with a heat storage capsule (not shown).

In the above example, a heat medium with a light specific gravity is used in the heat demand section and a heat medium with a heavy specific gravity is used in the heat supply source. Any suitable heat medium may be used.

Valves 13, 14 and 15, 16 are opened when the heat supply and demand parts are circulated, respectively, and closed when only one of them is used.

That is, when only heat is to be radiated from the heat storage tank, valves 13 and 14 may be opened and valves 15 and 16 may be closed.

The opposite is true for heat storage.

FIG. 2 a+b illustrates the upper and lower pipes 2, 3.

As an example, the surface of the tube, which is shown as a hollow circle, is provided with a large number of holes 17 that pass through the inner and outer surfaces of the tube.

Although the arrangement is shown in a grid pattern in the figure, the arrangement is not limited to this, and may be, for example, a staggered arrangement or a random arrangement.

One end 18 is closed, and the pond end 19 is open to allow a heat medium to flow in.

One or more such distribution pipes are arranged at the upper and lower parts of the heat storage tank, respectively, so that sufficient heat exchange can be performed with the heat storage capsule and the heat medium.

FIG. 3 shows an example of a heat storage capsule.

The heat storage capsule 20 has a flat plate shape, and one or more holes 21 are bored so as to communicate between the front surface and the back surface.

This hole 21 does not have to be circular and may be rectangular.

One or more branch pipes 22 protrude into the hole 21, and the inside thereof is filled with a nucleating agent.

When the heat medium flows through the holes 21 and drops below the specified temperature, a phase change occurs starting from the nucleating agent in the capsule 20.
heat is transferred to the heating medium.

FIG. 4 shows an example of music for the heat storage capsule 20.

The holes 21 are drilled in the same manner as in FIG. 3, and the branch pipes protrude at right angles from one or both sides of the flat plate surface of the capsule.

FIG. 5 shows an example of the arrangement of capsules 20.

The capsules 20 are stacked horizontally or slightly obliquely in the heat storage tank, and the heat medium flows on the surface of the capsules 20 and passes through the holes 21 from top to bottom, or from the bottom to the top. flows.

By carefully arranging the holes 21, the flowing heat medium can be
It is necessary to make sufficient contact with the capsule, and it is desirable that the holes in the upper and lower capsules do not face each other.

The branch tube 22 can also be used as a spacer between both capsules.

FIG. 6 shows an example of a pond in which capsules 20 are arranged.

The capsules 20 stacked one on top of the other are alternately provided with rectangular holes 21 only at different ends, so that the flowing heat medium flows from the left end of the upper capsule to the middle capsule, and then at the right end 1. It flows to the next lower capsule, flows at the left end 1 where it is broken, and repeats this process as more capsules are added.

This allows sufficient contact between the heat medium and the capsule, and allows rapid heat radiation and heat reception.

1. In addition, the outer dimensions of the flat capsule are made to be approximately the same as the inner shape of the heat storage tank, and the capsule is stored in the tank, or an elastic sealant is placed on the end face of the capsule, and then the capsule is stored in the tank. By doing so, the gap between the inner wall of the heat storage tank and the heat storage tank is eliminated, so that the heat medium always flows on the surface of the flat capsule, and sufficient heat exchange can be performed with the capsule.

As is clear from the above description, according to the present invention, a large amount of heat can be stored in a small heat storage tank, and since it is a direct heat exchange, a heat exchanger in the heat storage tank can be omitted, and it is faster than a heat storage capsule. By performing heat reception and heat dissipation, it is possible to respond well to the demands of the heat demand side and the heat supply side, so the energy saving effect is significant.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of a system using the heat storage tank device of the present invention, Fig. 2 a+b is a side view and cross-sectional view of the distribution pipe, Fig. 3,
FIG. 4 is a perspective view of the capsule, and FIGS. 5 and 6 are perspective views showing the arrangement of the capsules. 1... Heat storage tank, 2, 3... Upper and lower piping, 4,
5... Heat medium, 20... Heat storage capsule, 21...
Communication hole, 22...branch pipe.

Claims (1)

[Claims] 1. Enclosed with a heat storage material that undergoes a dramatic phase change at a specified temperature,
A plurality of flat capsules each having a hole connecting the front surface and the back surface, and a protruding branch pipe in which a nucleating agent is sealed are arranged in a heat storage tank almost horizontally and overlapping each other at intervals. , a heat medium that does not solidify within the operating temperature range is stored in the heat storage tank, and the heat medium that is circulated through an upper and a lower part of the heat storage tank, respectively, is discharged into an upper and lower part of the heat storage tank. 1. A heat storage tank device characterized by having a distribution pipe with a large number of holes for storage. 2. The heat storage tank device according to claim 1, characterized in that different heat media are used for the heat demand section and the heat supply section, which do not cause a chemical reaction with each other and do not mix. 3. The heat storage tank device according to claim 1, wherein the protruding branch pipes of the capsules serve as spacers between the capsules. 4. The heat storage tank device according to claim 1, wherein the outer diameter of the flat capsule is approximately the same as the inner shape of the heat storage tank.