JPH06313688A - Heat storage system - Google Patents

Abstract

PURPOSE:To provide a heat storage system in which latent heat storage material to be used can be reemulsified in the system for storing heat or transferring heat by using the material using latent heat generated by state change. CONSTITUTION:A heat storage system comprises a heat storage tank 1 having emulsion emulsified from a dispersive state of higher melting point than that of continuous state in the continuous state as latent heat storage material 2, a stirrer for stirring the material 2, a heat exchanger 5 by a heat pump 4 as a heat storage heat source, a tube 8 for circulating via a heat dissipating fan coil 7 and a conveying pump 6 as a heat dissipating mechanism, and a tube 9 for circulating to an emulsifier 10 for reemulsifying the separated latent heat storage material 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a re-emulsification mechanism for a latent heat storage material in a heat storage system that stores or transfers heat using a latent heat storage material that utilizes latent heat generated by a phase change.

This heat storage system is used as an air conditioning system or the like.

[0003]

2. Description of the Related Art A conventional PCM-based heat storage system is
A system for re-emulsifying the dispersed phase components of the latent heat storage material and a system for preventing the destruction of the latent heat storage material itself were not added.

[0004]

SUMMARY OF THE INVENTION In the above-mentioned prior art, when the heat storage due to the solidification of the dispersed phase material is repeated, the emulsion film of the latent heat storage material is destroyed and the separated state is regenerated when the phase separation of the dispersed phase occurs. There was no function, and there was a problem that the heat exchange performance deteriorated and the material became a hazardous material due to the exposure of the dispersed phase.

The present invention has been made in view of the above circumstances, and its purpose is to stabilize the emulsified state of the latent heat storage material, to stabilize the heat exchange performance, and to prevent the material from becoming a hazardous material. To do.

[0006]

A heat storage tank 1 having a latent heat storage material 2 of an emulsion obtained by emulsifying a dispersed phase having a higher melting point than the continuous phase in a continuous phase, and a stirrer 3 for stirring the latent heat storage material 2. , Heat pump 4 as heat source 7 for heat storage
A heat storage system constituted by a heat exchanger 5 according to the above, a pipe 8 for circulating a heat radiation fan coil and a transfer pump 6 as a heat radiation mechanism, and a pipe 9 for circulating the separated latent heat storage material 2 to an emulsification device 10 for re-emulsification. .

[0007]

[Operation] In the present invention, the latent heat storage material 2 stored in the heat storage tank 1 that has been stored by the heat pump 4 radiates heat through the heat radiating pipe 8, and the latent heat storage material separated by repeated storage and cooling is stored. It is conveyed to the emulsification device 10 through a pipe 9 having a suction port at the upper part of the tank or the like and re-emulsified by atomizing the dispersion tank to obtain a stable dispersion state.

In general, the separated dispersed phase has a specific gravity lighter than that of water, and thus forms a layer above the heat storage tank 1. When atomizing the dispersed phase material conveyed from the upper part of the heat storage layer 1 to the emulsification device 10, the particle size changes depending on the temperature condition. Is to be emulsified.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the invention according to the present application will be described below with reference to the drawings.

In the latent heat storage material 2 of emulsion, the melting point of the dispersed phase is higher than the melting point of the continuous phase.

While stirring the latent heat storage material 2 in the heat storage tank 1 with the stirrer 3, the heat exchanger 5 having the heat pump 4 stores heat, and the transfer pump 6 sends it to the fan coil 7 for radiating heat to utilize the latent heat. After use, the latent heat storage material 2 is circulated through the pipe 8.

The dispersed phase material separated by repeating the cycle is conveyed to the emulsifying device 10 through the pipe 9 and emulsified again to be returned to the heat storage tank 1.

The emulsifying apparatus 10 of the embodiment shown in FIG. 1 is a gear pump or a magnet pump, which is intended to atomize the dispersed phase material separated by the shear stress of the pump.

The emulsifying apparatus 10 of the embodiment shown in FIG. 2 is a homogenizer or a homomixer, and a pipe 9 is provided with a transfer pump 11.

FIG. 3 shows still another embodiment of the invention according to the present application. The invention will be disclosed based on this figure.

Reference numeral 2 is an emulsion latent heat storage material. This is an emulsion obtained by dispersing crystalline organic compounds (paraffins) such as crystalline linear alkyl hydrocarbons, higher fatty acids, higher fatty acid esters, and higher aliphatic alcohols in a continuous phase of water as a dispersed phase by a surfactant. In the latent heat storage material 2 of No. 3, the melting point of the dispersed phase is higher than that of the continuous phase, and the paraffin content is 40 to 50.
Weight percent is suitable. This is because if the content is higher than this, the viscosity increases and the fluidity is impaired.

Reference numeral 21 is a separation layer of the latent heat storage material 2 of the emulsion, in which the core of the surfactant which has maintained the dispersed state by thermal / mechanical shear is released and the paraffin layer is suspended. When the separation is severe, only the paraffin layer is completely deposited and becomes a transparent layer.

A heat storage tank 1 is a latent heat storage material 2 of emulsion of 40 to 50% by weight, which is about 600 liters as a heat load of a 3LDK house.

The shape of the heat storage tank 1 is preferably a vertical cylindrical shape in order to realize uniform and efficient heat exchange during heat storage.
This is because if the shape is cylindrical, the flow of the latent heat storage material 2 of the emulsion inside becomes uniform, the uneven heat storage is eliminated, and the emulsion separation due to the thermal share due to excessive heat storage is reduced.

Reference numeral 4 denotes a heating / cooling device, which is provided with a heat exchanger 5 in the heat storage tank 1 and uses a heat pump for exchanging heat. When the temperature is raised, the latent heat storage material 2 of the emulsion is heated to 50 ° C.
When the heat is stored above, another heater (not shown) is also used.

Reference numeral 3 is a stirrer. If the stirrer 3 is used only for the purpose of flowing the latent heat storage material 2 of the emulsion in the heat storage tank 1 for heat storage, the rotation speed is 70 to 100 rpm and the number of blades is 2 in the 600 ria scale heat storage tank 1. About half the diameter of the tank cylinder is used as the blade length.

The latent heat storage material 2 in which the heat is stored is transported by the transport pump 6 to the fan coil 7 for heat radiation. Regarding transportation, of course, the latent heat storage material 2 is not directly transported,
You may make it heat-exchange with a secondary heat medium (water, brine, etc.), and may convey a secondary medium to a terminal. The parts described above are the same as those conventionally used.

It is the emulsifying device that is the main part of this embodiment that is composed of the parts 9, 11, 12, and 13.

The latent heat storage material 2 separated in the heat storage tank 1 appears as a separation layer 21 on the upper part thereof. Piping 9 is pump 11
Since it is for sending the separated emulsion to the buffer tank 12, it is desirable to install it in the vicinity of the emulsion liquid level in the heat storage tank 1.

Reference numeral 12 is a buffer tank for accommodating the separation tank 21. The shape and material of the buffer tank 12 are the same as those of the heat storage tank 1, and the size of the buffer tank 12 is about 10 liters with respect to 600 liters of the heat storage tank 1.

The separated emulsion stored in the buffer tank 12 is heated by the heating device 22 and is rapidly stirred by the stirring device 13. As the heating device 22, it is appropriate to use an electric heater because the temperature rises to 70 ° C level.

The stirrer 13 has a specification different from that of the stirrer 3 because the purpose is to redisperse the emulsion. The rotation speed of the motor is around 200 rpm, and the number of blades is about 4 in a tank of 10 liter level.

As the stirring device 13, a stirrer motor may not be used, but a dispersion-dedicated machine such as a homogenizer may be used. In the buffer tank 12 where the redispersion is completed, the latent heat storage material 2 of the emulsion is returned to the heat storage tank 1 via the return pipe 9.

[0029]

According to the present invention, the separated material can be re-emulsified even after repeated storage and cooling, so that the heat exchange performance becomes stable.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an embodiment of a heat storage system of the present invention.

FIG. 2 is a schematic view showing another embodiment of the heat storage system of the present invention.

FIG. 3 is a schematic view showing still another embodiment of the heat storage system of the present invention.

[Explanation of symbols]

 1 Heat Storage Tank 2 Latent Heat Storage Material 3 Stirrer 4 Heat Pump 5 Heat Storage Heat Exchanger 6 Transport Pump 7 Heat Dissipating Fan Coil 8 Piping 9 Piping 10 Emulsifier 11 Pump

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[Procedure amendment]

[Submission date] January 10, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

In general, the separated dispersed phase has a specific gravity lighter than that of water, and thus forms a layer above the heat storage tank 1. When the dispersed phase material conveyed from the upper part of the heat storage tank 1 to the emulsification device 10 is atomized, the particle size changes depending on the temperature condition. Is adjusted and re- emulsification is performed.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

The dispersed phase material separated by repeating the cycle is conveyed to the emulsification device 10 through the pipe 9, re- emulsified and returned to the heat storage tank 1.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0015

[Correction method] Change

[Correction content]

[0015] FIG. 3 is a further embodiment of the engagement Ru inventions in the present application. The invention will be disclosed based on this figure.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0015

[Correction method] Change

[Correction content]

[0015] FIG. 3 is a further embodiment of the engagement Ru inventions in the present application. The invention will be disclosed based on this figure.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction content]

Reference numeral 21 is a separation layer of the latent heat storage material 2 of the emulsion, which is a layer in which the surface active agent which has maintained the dispersed state due to repeated heat storage and heat release and mechanical shear is removed and the paraffin layer floats. When the separation is severe, only the paraffin layer is completely deposited and becomes a transparent layer.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Change

[Correction content]

The shape of the heat storage tank 1 is preferably a vertical cylindrical shape in order to realize uniform and efficient heat exchange during heat storage.
This is because if the shape is cylindrical, the flow of the latent heat storage material 2 of the emulsion inside becomes uniform, the uneven heat storage is eliminated, and the emulsion separation due to the destruction of the surfactant mechanism due to excessive heat storage is reduced.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction content]

Reference numeral 3 is a stirrer. If you use the stirrer 3 purposes only flow of latent heat storage material 2 emulsion in the heat storage tank 1 for heat storage, the rotational speed 70～100Rpm, 2 sheets number of blades in 600 liter te scale of the heat storage tank 1, the length of the blade is about one-half of the tank cylinder diameter is used <br/>.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Name of item to be corrected] 0029

[Correction method] Change

[Correction content]

According to the present invention, the separated material can be re-emulsified even after repeated storage and cooling, so that the separation layer is exposed.
This prevents the material from becoming a hazardous material and stabilizes the heat exchange performance.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeru Dono, 1048, Kadoma, Kadoma, Osaka Prefecture, Matsushita Electric Works Co., Ltd. (72) Toshiki Tamura, 1048, Kadoma, Kadoma, Osaka Prefecture 72) Inventor Noriyuki Kitachi 1048, Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works Co., Ltd.

Claims (6)

[Claims] 1. A heat storage tank 1 having a latent heat storage material 2 of an emulsion obtained by emulsifying a disperse phase having a melting point higher than that of the continuous phase, a stirrer 3 for stirring the latent heat storage material 2, and heat storage. A heat exchanger 5 using a heat pump 4 as a heat source for heat supply, a pipe 8 for circulating a fan coil 7 for heat radiation and a pump 6 for transportation as a heat radiation mechanism, and a pipe for circulating the separated latent heat storage material 2 to an emulsifying device 10 for re-emulsifying. Heat storage system consisting of 9 and. 2. The heat storage system according to claim 1, wherein a gas pump is used as the emulsifying device 10. 3. The heat storage system according to claim 1, wherein a magnet pump is used as the emulsifying device 10. 4. The heat storage system according to claim 1, wherein a homogenizer is used as the emulsifying device 10. 5. The heat storage system according to claim 1, wherein a homomixer is used as the emulsifying device 10. 6. The heat storage system according to claim 1, wherein a stirring device 13 and a heating device 22 are used as the emulsifying device 10.