JPS6176831A - Container for filling heat accumulation material - Google Patents

Abstract

PURPOSE:To allow the heating for a long time by efficiently accumulating the heat from a heater at the time of heat accumulation and reducing unnecessary heat release into the room by forming a container with film-like materials in which there is a flat hollow space and the thermal conductives of the two opposing flat members are different to each other. CONSTITUTION:The container 6 for filling heat accumulation material is a flat, hollow body that is made by sealing the perimeter of two film-like materials what have different thermal conductivity characteristics. The latent heat accumulation material 5 is filled in the hollow space to form a heat accumulation body 3, and the film side having a low thermal conductivity of the present heat accumulation container 6 is used on the heater side, and the film side having a low thermal conductivity on the floor side for floor heating, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a container filled with a heat storage material used in a heat storage type floor heating system or the like that utilizes nighttime electricity or the like.

BACKGROUND ART Conventional configurations and their problems Recently, interest in thermal storage type floor heating systems that utilize late-night electricity has been increasing. The idea is to heat and store heat in a building frame made of mortar or concrete using late-night electricity, where electricity costs are low, and use it for daytime heating, with the heating load being the main part of the daytime heating load. Installation in office buildings, etc. is progressing. However, since sensible heat storage materials such as concrete have a low heat storage capacity, attempts have been made to use latent heat storage materials with higher heat storage capacity, and some are beginning to put them into practical use. In these floor heating systems, a heat insulating layer is provided on the floor of the building, a heater is installed on top of it to supply heat using late-night electricity, and a heat storage body containing a latent heat storage material is installed in contact with the heater. , on which protective mortar and flooring are installed. In order to obtain a comfortable heating effect, it is necessary to maintain the floor surface temperature at 20 to 23°C, and for this purpose, the melting point of the latent heat storage material must be higher than this. When using floor heating with such a structure, the heat stored in the heat storage material from the heater by heat conduction during late night heat storage is simultaneously released from the floor surface into the room during times when heating is not required. This causes a problem in that the higher the temperature of the heater in an attempt to efficiently store heat in a short period of time late at night, the more heat is wasted into the room.Objective of the InventionIn view of the above drawbacks, the present invention During heat storage, the heat from the heater is efficiently stored in the heat storage material, and unnecessary heat release into the room is reduced, allowing long-term heating.

Structure of the Invention In order to achieve the above object, the heat storage material-filled container according to the present invention is a flat hollow body made by combining two film materials with different heat transfer characteristics and sealing the periphery, and in which latent heat is generated in the hollow part. A heat storage body is formed by filling a heat storage material, and the film side with good thermal conductivity of this heat storage material filling container is placed on the heater side, and the side made of a film with low thermal conductivity is placed on the floor side for floor heating, etc. It is used for.

Description of examples Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1(a) is a plan view showing an example of a floor heating system using a heat storage body in which a heat storage material is sealed in a heat storage material filling container according to an embodiment of the present invention, and FIG. Ap of /
FIG.

In the figure, 1 is a mortar, 2 is a planar heating element, 3 is a heat storage body, and 4 is mortar, and the mortar 4 is composed of a heat storage material 5 and a heat storage material filling container 6.

A 20 on x 20 on polyethylene film (film thickness 0..1 +a) and a rubber sheet of the same size (in order of thickness) were put together and adhesive-sealed on three sides to form a heat storage material filling container 6. Heat storage material 5'f so that it becomes 1
: After filling, the opening was sealed with adhesive to form a heat storage body 3.

The heat storage material 6 is mainly made of Na25o4.10ma rho, to which a nucleating material and a gelling agent are added, melting point 32°C, freezing point 29°C, latent heat of fusion approximately 50 cal/? I used the one from As shown in Figure 1, a surface area of 20 cm x 20 c is placed at the center of the surface of mortar 1 with a surface area of 30 α x 30 m and a thickness of 5 m.
m, a planar heating element (surface insulation) 2 with a thickness of about 3 mm is installed, and the heat storage element 3 is placed on top of it with the side without the rubber sheet in contact with the planar heating element 2, and finally mortar is placed. 4 was poured on top of each other, and after drying, a heat storage and heat dissipation experiment was conducted.

In the experiment, first, electricity was applied to the planar heating element 2 to store heat in the heat storage element 3. At this time, the voltage applied to the planar heating element 2 was adjusted so that the temperature of the surface of the heating element 2 in contact with the heat storage material filling container 6 of the heat storage element 3 was 40°C. FIG. 2 shows the surface temperature of the heating element 2 in a) and the surface temperature of the mortar 4 in (b) during heat storage.

On the other hand, a container filled with heat storage material with the same structure except that polyethylene film (thickness 0.1++lII+) was used for both the heater side and the floor side was created, and the surface temperature of mortar 4 was calculated when the same experiment was conducted. (c) in Figure 2
shown for comparison. When the heat storage material 6 melted and started storing heat, the surface temperature of the mortar 40 rose slowly, and when the heat storage material 5 finished melting, it rose rapidly again.

As is clear from the figure, the difference between the case of using the heat storage material filled containers of this example (B) and the case of using a normal container (C) is that during the heat storage time (o) is 1 to 2 times smaller than ti. The temperature remained low. In a thermal storage floor heating system that uses late-night electricity,
There is no need for heating during the heat storage time, and in order to prevent heat loss from the floor surface, it is desirable to keep the surface temperature as low as possible, and the effect of using the heat storage material filled container 6 of this example is clearly recognized. It was done.

Next, in order to examine the characteristics during heat dissipation (heating), after sufficiently heating the mortar 40 and the surface temperature reached 40°C, the mortar was placed in a constant temperature bath where the internal temperature was maintained at 20°C. The difference between the case where the heat storage material filling container 6 of this example was used and the case where a normal container was used was measured.

As shown in FIG. 3, the surface temperature of the mortar 4 in each case shows a flat part corresponding to the solidification of the heat storage material 5 in each case, but when the heat storage material filling container 6 of this embodiment is used. (cI) is lower by 1°C or more and stays in the flat part for a longer time than in case (c). This result shows that when a normal container is used, the heat transfer to the floor is so good that the floor surface temperature rises and is released in a short time, whereas when the container of this example is used. This shows that heat radiation is controlled and heating can be performed slowly over a long period of time, and it was confirmed that the effect of this example is clear.

As is clear from the above embodiments, this embodiment reduces the release of unnecessary heat during heat storage, and enables slow radiative heating over a long period of time during radiative heating. In this example, a combination of polyethylene film and rubber sheet was used as the container material, but the gist of the present invention is not limited to these materials. The material should be selected depending on the melting point, and the heater side of the heat storage material filling container 6 should have as good heat conduction as possible to facilitate heat storage, and the floor side should be made of a material that has an appropriate thermal resistance to slowly dissipate heat. All you have to do is configure the container. The ratio of the thermal conductivity of the material used for the heater side and the material used for the floor side is not particularly limited, but in order to obtain the effect of the main idea of the present invention, the thermal conductivity on both sides must be at least 10 times or more. It is desirable to reach.

Effects of the Invention In short, the present invention provides a heat storage material-filled container having a flat hollow structure made of a film-like material, and characterized in that two opposing flat surfaces have different thermal conductivities. The heat storage material is sealed in the hollow part of this container, and it is installed under the floor together with the heater, with the film side made of a material with good thermal conductivity facing the heater side, and the film side consisting of a material with low thermal conductivity facing the heater side. By providing this on the floor side, it is possible to reduce wasteful heat radiation during heat storage and extend the heating time.

[Brief explanation of the drawing]

FIG. 1(a) is a plan view of a heat storage type floor heating system using a heat storage material filled container according to an embodiment of the present invention, and FIG. 1(b)
2 is a cross-sectional view taken along line A-A' in FIG. 2A, FIG. 2 is a diagram showing temperature changes during heat storage, and FIG. 3 is a diagram showing temperature changes during heat radiation. 1.4... Mortar, 2... Planar heating element, 3... Heat storage body, 5... Heat storage material, 6
・・・・・・Container filled with heat storage material. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure (Q (b) Figure 2 closed

Claims (2)

[Claims] (1) A container filled with a heat storage material, which is made of a film-like material, has a hollow structure in a flat shape, and has two opposing flat surfaces having different thermal conductivities. (2) The heat storage material-filled container according to claim 1, wherein the thermal conductivity of the two flat surfaces differs by a factor of 10 or more.