JPS6048499A - Heat accumulator - Google Patents

Abstract

PURPOSE:To eliminate the requirement for multi-tank structure of a heat accumulator and contrive the reducing of manufacturing cost of the heat accumulator by utilizing more than two kinds of heat accumulating meterials having non-mixing property each other an each different fusion point. CONSTITUTION:A heat accumulator 5 is composed of a paraffin group 6 and a heat accumulating material 7, those two materials are directly enclosed in the same heat accumulating vessel. The heat accumulating material has a non-mixing property for said paraffin group and consists of more than one kind of inorganic hydrate group having each different fusion point. A paraffin group having an optinonal fusion point can be utilized as the heat accumulating material, further, the material having not only lower fusion point than an inorganic hydrate, but also having higher fusion point than the inorganic hydrate can be utilized. At the operation of the heat accumulator or room heating or hot-water supply, the heat accumulating material suitable for the utilizing purpose is the inorganic hydrate having the fusion point of approximate 30-90 deg.C, but the inorganic hydrate satisfying said condtions is very few. Therefore, the temperature range which is not fully covered only by the inorganic hydrate is compensated by the paraffin group. In this case, when there is no problem concerned with the high or low temperature for the fusion point of the inorganic hydrate, the solution means can be easily obtained.

Description

[Detailed Description of the Invention] The present invention provides storage? ? Regarding A device. More specifically, the present invention relates to a heat storage device in which two or more types of heat storage materials having different melting points are sealed in the same container.

A storage device made by sealing two or more types of heat storage materials with different melting points in the same container! ! Regarding J-devices, there are the following conventional technologies.

(1) Heat storage materials that can be obtained by mixing two or more types of materials, such as benzene and paraffins (Japanese Patent Publication No. 1987-
41779) This allows cold storage and wet storage to be performed in the same heat storage device, but in this case efforts are being made to prevent the different heat storage materials from being separated from each other.

(2) For example, three gentlemen's heat storage '4: 311.Af1 were housed in separate brains. A heat storage device with a v structure (Japanese Unexamined Patent Application Publication No. 53-15657, No. 56 10697 @ publication).
There are problems in practical use due to the cost and K j /.

(3) Capsules filled with 1+1 paraffins with a melting point slightly lower than Iso hydrate (1+1), which fills the space between the capsules and the space between the capsules. No. 40583 Paraffins act as a heat medium for inorganic hydrates, which are original heat storage materials, and also function as heat storage materials.
In order to improve the efficiency of heat exchange, it is necessary to take the complicated and expensive method of microencapsulation of hydrated hydrates.

By the way, if two or more types of heat storage materials having different melting points are used in this way, for example, when used in a heat storage solar system, the level of human power will fluctuate due to summer and winter or sunny and cloudy days. This makes it possible to store enough heat to cope with the situation. As other specific heat storage materials, inorganic hydrate-based and organic-based heat storage materials are used in heat storage devices intended for space heating or hot water supply. When two or more of these are used in combination, the materials themselves will have good physical properties due to their mutual effects, and will have a secondary (point) suitable for the required temperature level. [It's been a long time since I've been in the middle of a long time since I've been in the middle of a long time since I've been in the middle of a long time.

There (゛, inorganic hydrate and organic matter are brought into direct contact with each other'l)
Looking at the heat storage material used in -+i, inorganic J<
In! proboscis t4. When melted, a highly concentrated aqueous solution of inorganic salts is formed, so if the organic material is water-soluble, the heat storage materials will change in quality over long-term thermal cycles. Alcohols and fatty acids are not suitable. Therefore, organic substances used in combination with inorganic hydrates must be immiscible with each other and must not cause material deterioration as a heat storage material.As a result of consideration, we found that paraffins are suitable for such purposes. It was effective.

The present invention relates to such a heat accumulator encapsulating a heat accumulator,
That is, this heat storage device is made by directly sealing paraffins and one or more types of inorganic hydrate heat storage materials that are immiscible with paraffins and have different melting points into the same heat storage container.

The heat storage material used in the heat storage device of the present invention may be the same as the heat storage material described in prior art (3) above, except that it is not encapsulated. By using it in contact with paraffins,
On the contrary, the following advantages are not obtained.

(a) Since paraffins and inorganic hydrates are not compatible and have different specific gravities, they can exist completely separated in the same container. For this reason, the preceding technique: j (2)
As shown in Figure 1, there is no need for a multi-tank structure heat storage to separate each heat absorbing material. ! %
ji> manufacturing cost can be reduced.

(b) Heat storage) If the structure of the ig is made into a shell-tube type, and the tube through which the heat medium th r = water passes through is passed through vertically in the shape of a serpentine tube, they can be separated from each other. , paraffin forming the upper layer) y1 heat storage material and lower layer j
・Kl simultaneously with the inorganic hydrated salt heat storage material forming n:
, it is possible to change the shape of the blade.

(c) Paraffins that have any melting point can be used, and therefore, paraffins such as IJ2 for encapsulation, which have a lower melting point than hydrates (3), can be used.
It is also possible to use a product with a higher melting point than Senkoku hydrate.

In swamp heat storage, in order to operate the heat storage device efficiently,
It is known in general VC that it is effective to use a heat storage material having a melting point close to the heat source temperature and slightly lower than the heat source temperature. However, if a heat storage device is used for the purpose of heating or hot water supply, it is necessary to
Material t'' about 30 to 90℃ 6:, total power! (Is it a residual hydrate? Add λ' to low price, high'+1'f+'i'!l'f' if what practicality) Add 114 ( The hydrate is 1'11-acid,
Each of them has a pattern of tsunami (the melting point of the material is 1/C4d, lhA, and the curve is large 7: "Camp" is observed. Therefore, when there is a fluctuation in the heat source temperature, the optimal inorganic hydrate is found within the range of the fluctuation. However, when dealing with other temperature ranges where d and ηf cannot be compensated for by using paraffin% i, it is necessary to select
7: ``It can be said that the effectiveness of the response method is further increased by not having to do anything.

Calculate each heat storage H↓ from the latent heat ratio of each heat storage material to the target ratio of each heat material, and decide based on Part 1. However, it is generally preferable to use a heat storage material with a lower melting point.

(d) As described in the prior art (]), the freezing accelerator (nucleating agent) for preventing supercooling of the heat storage interest is -1
9 The heat material is easy to separate and therefore generates sufficient nucleating action 1
However, in the case of the present invention, the nucleating agent added to the material is not separated from the heat storage material 51 and is fully absorbed. The nucleation effect is fully expressed.

(θ)・1 The phantom invention is based on the attached prior art (s) ll. All of the heat storage materials described in the appended prior art (s) are combined with J1L hydrate and paraffins, i: rt < 1. '! yTffC
Immiscible and mutually different melting points':i: 2 complements 1
If the above heat storage material is used, Chair J゛1. tlj goti
Even if it is related to the above, it is possible to achieve the desired taste.

Next, the present invention will be explained in detail using an actual hdI example υζ.

ZJ store [column] ;! +'1. G'd no 'rium trihydrate 20,
RLL prepared from phosphorous dihydrogen 12 hydrate 4h 0.29 and water 0.769 (touch point 5)
8℃) and solid paraffin (melting point 52/54℃)
10 liters at the same time in a 50 meter capacity gubbs bottle,
Heated to 80°C.

By this heating, each seedling heat harvest material was completely melted, but separated into two layers. When this was vigorously stirred and left for about 5 minutes, it separated into two layers again, confirming that there was no compatibility between the heat storage materials. Furthermore, store this at room temperature (20℃)
When left to cool until 20 minutes, heat storage (both materials A solidified separately at each point t. Such heating-cooling operation was continued for 20 minutes.
After repeating the process, there was no change, and the two solidified separately.

During each heating-cooling operation, the temperature change over time of the heat storage material (curve I) and the solid noraf heat storage material material (curve 11) over time during the heating and cooling operations is as follows. The height of the A material layer was determined by a thermocouple set at 4ηj, and the results are shown in the graph of FIG. 1. Note that the measurement result qt is the same for γσ times.

Example 2? If! Total amount of 111゛i thermal material 14;l (melting point 36°C) prepared from 20 g of iGG zinc hexahydrate and 1) chloride salt TJ:/0.2 q of lithium octahydrate (melting point 36°C) and solid paraffin. (Melting point: 16-48G) Using 109, the same heating (60° C.)-cooling operation as in Example J was repeated. This operation was repeated 10 times, but there was no change, and the assimilation of both was repeated.

Example 3 It'll be nickel hexahydrate 20 g and strontium hydroxide octahydrate 02 g to 11 w = 5
Using a total of 4 f'' of Reako heat storage material No. 4 (melting point 54°C) and solid paraffin (melting point 46-48°C) 1 (19), real 1
ii+i, '/AJ Same heating as 1 (70?;)-
Class cold operation Taniichi repeats Tsukoyo/, f(☆kisaku wo 1
7 times repeated 0 times, there is no change in f, C<,
Both of them have separate hard ihika: repeated.

Example 4 Phosphorus nρ disodium hydrogen 12-hydrogen (tel(,
d, 35°C) hardened at 20 degrees Celsius (melting point 46°C).
The same heating (60°C -) and cooling operation (1 L) as in Example 1 was repeated. Repeat this kind of sweeping 10 times.1. : However, there was no change, and the two were repeatedly solidified.

Actual #i+i Example 5 Barium hydroxide octahydrate 20c/'j-) and water ε1
Strontium chloride 0.2! The total amount of the heat storage material prepared from No. 17 (melting point 78°C) and solid paraffin (fine; point 58
Heating was carried out in the same manner as in Example 1 (9 to 60°C).
0℃) - Repeat cold harvesting to 7. 1 such operation
Repeatedly 0 times, but there, L there is no succulence fj<
, both of them solidify separately 71. Ta.

Example 6 The heat storage device shown in FIG.
, At the liquid outlet 2, i'l-(' :?i heat' city test 3,
3' Oka Rinya 1. -Liquid inlet D (!: h Outer D (!:
(r”) Iil ;'l' 7.4): (1)
7 inr-t'j:,'l,4'.

・1〃,... connected with J], ta-1 is also inside the Kumagai vessel 5 (where, the above-mentioned Example 1- Be (58C) 6 no.
5 and 9 were directly enclosed. Each of these heat storage materials (1, 1, 1, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, , , , , , , , , , , , , , , , , 1, , , , , 1, , 1, , 1, , 1, , , , 1, , , 1, , , 1, , 1, 2, , 2, , 2, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,, t, t/l, t/l, t/l, and each other are completely coated in 1 fC).

Heat storage device configured in this manner (-180°C hot water and 0 and 20°C cold water were alternately added, heat absorption and heat radiation were repeated 7 times, and the pfi of the heat storage device was 71%) V″l
:5 I'll wash 4L over time (for example, when the temperature changes, the graph in Fig.
It was found that effective 7f heat storage was achieved at two different temperature levels.

[Brief explanation of the drawing]

Figure 1 shows the radiation IA of each heat storage material used in Example 1.
It is a graph showing the temperature change over time in JIG&G. FIG. 2 is a longitudinal sectional view along the center line of the heat storage device used in Example 6. Moreover, FIG. 3 is a graph showing the temperature change over time during heat dissipation in Example 6. ...Liquid outlet 4...Finned tube 5...Heat storage device 6...Heat storage material I 7...Heat storage material■ Representative patent attorney Yoshi 114 Toshio

Claims (1)

[Claims] A heat storage device comprising paraffins and one or more heat storage materials immiscible with paraffins and having different melting points directly sealed in the same heat storage container. 2. The heat storage device according to claim 1, wherein the heat storage material is an inorganic hydrate-based heat storage material. 3. The heat storage device according to claim 2, wherein an inorganic hydrate-based thermothermal material having a higher melting point than paraffins is used. 4 Inorganic hydrate-based Buddhist heat material with a lower melting point than paraffins, +
5. The heat storage device according to claim 1, which is used for the purpose of heating and hot water supply.