JPH08303976A - Heat medium flowing system in heat accumulating tank - Google Patents

Abstract

PURPOSE: To provide a compact-sized heat accumulating tank having an improved heat accumulating efficiency by a method wherein a temperature flow layer can be formed by one heat accumulating tank without partitioning an inside part of the tank and a useless space or dead water region not contributing to a heat accumulating operation is prevented from being generated. CONSTITUTION: Each of thermal medium distributing pipes 3a, 3b is arranged at a top plate 1a and a bottom plate 1b inside a main body 1 of a heat accumulating tank. Hot thermal medium inlet or outlet connection port 7 is arranged at the thermal medium distributing pipe 3a at the top plate 1a and in turn, a plurality of cold thermal medium inlet or outlet connection ports 9 are arranged the thermal medium distributing pipe 3b at the bottom plate 1b. A plurality of inlet or outlet holes 11 directed toward the top plate 1a are punched at the thermal medium distributing pipe 3a at the top plate 1a and also a plurality of inlet or outlet holes 11 directed toward the bottom plate 1b are punched at the thermal medium distributing pipe 3b at the bottom plate 1b. Heat accumulating material 15 heat exchanging with the thermal medium 13 while being contacted to each other is fed in the main body 1 of the heat accumulating tank.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat medium flow system for a heat storage tank used as, for example, an auxiliary heat source for an air conditioner.

[0002]

2. Description of the Related Art A heat storage tank is used to store heat energy by using inexpensive late-night power and to contribute as an auxiliary to a heat source in a daytime of a cooling and heating apparatus. In a heat storage tank filled with a liquid heat medium (hereinafter, referred to as “heat medium”), the heat medium does not mix or diffuse, and the heat medium does not flow in or out of the heat storage tank in a laminar flow state. Making the flow closer to the piston flow is an important factor for improving the heat storage efficiency.

In a conventional heat storage tank in consideration of this, for example, the inside of the tank is divided into small compartments by partition walls, which are weirs and submerged weirs, and the partitioned single tanks are connected in series so as to be lined up and arranged at one end side. There is a single tank in which a cooling / heating medium pipe of a cooling / heating device is connected, and a single tank on the other end side is connected to a heating / heating medium pipe of a cooling / heating device. In such a heat storage tank,
When performing cooling in the summer, etc., at night when the cooling load is small, the cooling and heating medium is sent to the single tank on one end side and sequentially stored in the single tank on the other end side through the weir / submerged weir to store the cooling medium in the daytime. When the temperature is large, the cooling / heating medium is taken out from the single tank on the one end side and used as an auxiliary heat source for cooling, and when heating is performed in the winter, the heating / heating medium is stored in the opposite direction to the above.

In the above-mentioned heat storage tank, by arranging the single tanks in series, the mixing or diffusion of the heat medium is reduced as compared with one large-capacity heat storage tank, and the cold heat medium is placed at the bottom by the weir / submerged weir. The flow of cold / heat heat medium in each single tank matches the direction of buoyancy due to temperature difference. In this way, it was considered that the flow in the tank would be a piston flow as much as possible.

[0005]

However, in the above-described conventional heat storage tank, the inside of the tank must be partitioned into small compartments by partition walls, which are weirs and submerged weirs, and the single tanks must be arranged in series so as to communicate in series. Therefore, there is a problem that the structure becomes complicated and the manufacturing cost increases. Also, in a heat storage tank in which single tanks are arranged in series, the heat storage tank approaches the piston flow as a whole, but there is considerable mixing / diffusion in each single tank, and the heat medium dispersion is not even The medium temperature stratified flow could not be formed sufficiently. Therefore, a wasteful space or dead water area that does not contribute to heat storage is generated in the tank, which is an obstacle to improving heat storage efficiency. The present invention has been made in view of the above situation, and a vertical temperature stratified flow can be formed in one heat storage tank without partitioning the inside of the tank, and a wasteful space or dead water area that does not contribute to heat storage is generated. The purpose of the present invention is to provide a heat medium flow system for a heat storage tank that does not exist, to make the heat storage tank structure compact and to improve heat storage efficiency.

[0006]

In order to achieve the above object, a heat medium flow system for a heat storage tank according to the present invention is provided with heat medium distribution pipes on the top plate side and the bottom plate side inside the heat storage tank body. , A heating medium inlet / outlet connection port is provided in the heating medium distribution pipe on the top plate side, and a cooling / heating medium inlet / outlet connection port is provided in the heating medium distribution pipe on the bottom plate side, and a top plate is provided in the heating medium distribution pipe on the top plate side. A plurality of inlet / outlet holes facing the side are formed, and a plurality of inlet / outlet holes facing the bottom plate side are formed in the heat medium distribution pipe on the bottom plate side, and a heat storage body for exchanging heat by contacting the heat medium is formed. It is characterized by being filled in the heat storage tank body.

[0007]

[Function] During heat storage during heating, the heat transfer medium is sent from the heat transfer medium inlet / outlet connection port, the heat transfer medium flows into the heat transfer medium distribution pipe arranged at the upper part of the heat storage tank, and the top plate of the heat storage tank main body is introduced from the inlet / outlet hole. Is discharged toward. The discharged hot heat medium collides with the top plate of the heat storage tank body and is sprayed, and reaches a bottom plate of the heat storage tank body as a vertical temperature stratified flow without diffusing and mixing between the heat storage bodies. The warm heat medium that has arrived is sucked into the inlet / outlet hole of the heat medium distribution pipe arranged below the heat storage tank body, and is discharged from the cold heat medium inlet / outlet connection port. In heat storage during cooling, contrary to the above heating, the cold heat medium is sent from the cold heat medium inlet / outlet connection port, discharged from the heat medium distribution pipe in the lower part of the heat storage tank, and discharged from the heat medium distribution pipe in the upper part of the heat storage tank. It

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a heat medium flow system according to the present invention will be described below with reference to the drawings. 1 is a perspective view of a heat medium flow system according to the present invention, FIG. 2 is a perspective plan view of a heat medium flow system according to the present invention, and FIG. 3 is a perspective side view of a heat medium flow system according to the present invention. Heat medium distribution pipes 3a and 3b are arranged on the top plate 1a side and the bottom plate 1b side inside the heat storage tank body 1 formed in a watertight structure, and the heat medium distribution pipes 3a and 3b are assembled in a frame shape, for example. The bypass pipe 5 is branched and connected to the inner peripheral side. The heating medium distribution pipe 3a on the top plate 1a side is provided with a heating / heating medium inlet / outlet connection port 7, while the heating medium distribution pipe 3b on the bottom plate 1b side is provided with a cooling / heating medium inlet / outlet connection port 9. 7 and the cooling / heating medium inlet / outlet connection port 9 are connected to a heating medium pipe from a heat pump or the like (not shown).

The heat medium distribution pipe 3a has a plurality of inlet / outlet holes 11 facing the top plate 1a, and the heat medium distribution pipe 3b has a plurality of inlet / outlet holes 11 facing the bottom plate 1b. The inlet / outlet hole 11 discharges or sucks the heat medium 13 in the vertical direction with respect to the top plate 1a and the bottom plate 1b which are in close proximity. The inlet / outlet holes 11 are bored at an optimum pitch and hole diameter so that the heat medium 13 flowing from above the heat storage tank body 1 downward (or flowing in the opposite direction) becomes an evenly distributed flow. As a result, the heat medium 13 discharged from the upper heat medium dispersion pipe 3a is
After once colliding with the top plate 1a, it becomes a piston flow and flows downward, again collides with the bottom plate 1b, and then is sucked from the heat medium distribution pipe 3b. Note that this flow direction is the flow of the heat transfer medium during heat storage, and the flow of the heat transfer medium during heat dissipation is the opposite direction. Further, the heat storage tank main body 1 is filled with a capsule-shaped heat storage body 15, and the heat storage body 15 contacts the heat medium 13 to exchange heat and store heat.

The operation of the heat medium flow system of the heat storage tank thus configured will be described. In the heat storage during heating, the heat medium 13 is sent from the warm heat medium inlet / outlet connection port 7 and flows into the heat medium distribution pipe 3a arranged in the upper part of the heat storage tank. As a result, the heat medium 13 is discharged toward the top plate 1a of the heat storage tank main body 1 from the inlet / outlet holes 11 whose pitch and hole diameter are designed in consideration of even distribution. The discharged heat medium 13 collides with the top plate 1a of the heat storage tank body 1 and is scattered. The dispersed heat medium 13 reaches the bottom plate 1b of the heat storage tank body 1 as a vertical temperature stratified flow without diffusing and mixing between the heat storage bodies 15. The heat medium 13 that has arrived is sucked into the inlet / outlet hole 11 of the heat medium distribution pipe 3 b arranged below the heat storage tank body 1. The sucked heat medium 13 is discharged from the cold heat medium inlet / outlet connection port 9 of the heat medium distribution pipe 3b. In heat storage during cooling, the heat medium 13 is sent from the cold heat medium inlet / outlet connection port 9 and discharged from the heat medium distribution pipe 3b, through the heat medium distribution pipe 3a, contrary to the above heating. And is discharged from the heating / heating medium inlet / outlet connection port 7.

According to the heat medium flow system of the heat storage tank described above, the heat medium distribution pipes 3a and 3b are arranged above and below the heat storage tank body 1 so that a vertical temperature stratified flow can be formed in the tank. Therefore, it is not necessary to partition the inside of the tank with a partition wall,
The heat storage tank can be manufactured with a simple structure. Further, since the heat storage body 15 and the heat medium 13 are evenly heat-exchanged by the temperature stratified flow in the vertical direction, the heat storage efficiency can be improved. Furthermore, by providing the heat medium distribution pipes 3a and 3b, it is possible to eliminate useless space that does not contribute to heat storage, and direct the inlet / outlet holes 11 of the heat medium distribution pipes 3a and 3b toward the top plate 1a and the bottom plate 1b. As a result, the dead water area can be eliminated, and this can also improve the heat storage efficiency.

[0012]

As described in detail above, according to the heat medium flow system of the heat storage tank according to the present invention, the heat medium distribution pipe is arranged to form the temperature stratified flow. The structure can be simple. Further, since the heat storage body and the heat medium are uniformly heat-exchanged by the temperature stratified flow, the heat storage efficiency can be improved. Furthermore, by the uniform distribution flow from the heat medium distribution pipe, it is possible to eliminate useless space that does not contribute to heat storage, and since the inlet / outlet holes are directed to the top plate and bottom plate side, it is possible to eliminate the dead water area, This can also improve the heat storage efficiency.

[Brief description of drawings]

FIG. 1 is a perspective view of a heat medium flow system of a heat storage tank according to the present invention.

FIG. 2 is a perspective plan view of a heat storage tank heat medium flow system according to the present invention.

FIG. 3 is a perspective side view of a heat storage tank heat medium flow system according to the present invention.

[Explanation of symbols]

 1 Heat Storage Tank Main Body 1a Top Plate 1b Bottom Plate 3a, 3b Heat Medium Distribution Pipe 7 Hot Heat Medium Inlet / Outlet Connection Port 9 Cold Heat Medium Inlet / Outlet Connection Port 11 Inlet / Outlet Port 13 Heat Medium 15 Heat Storage Material

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Chio Yoneda 1610 Shingasaki, Nagareyama-shi, Chiba Suga Kogyo Co., Ltd. Technical Research Institute (72) Toru Matsumoto 6-17-19 Shinbashi, Minato-ku, Tokyo Suga Kogyo In-house (72) Inventor Gentaro Mikami 6-17-19 Shimbashi, Minato-ku, Tokyo Suga Kogyo Co., Ltd. In-house (72) Inventor Yuji Takeda 1610 Reinagasaki, Nagareyama-shi, Chiba Suga Kogyo Co., Ltd. Technical Research Institute

Claims (1)

[Claims] 1. A heat medium distribution pipe is provided on each of a top plate side and a bottom plate side inside a heat storage tank main body, and a heat medium transfer port is provided on the heat medium distribution pipe on the top plate side, while a heat medium distribution port is provided on the bottom plate side. A heating / cooling medium inlet / outlet port is provided in the heating / medium distribution pipe, a plurality of inlet / outlet holes facing the ceiling plate are formed in the heating / medium distribution pipe on the top plate side, and a bottom plate is provided in the heating / medium distribution pipe on the bottom plate side. A heat medium flow system for a heat storage tank, wherein a plurality of inlet / outlet holes directed to the side are provided, and the heat storage tank body is filled with a heat storage body that exchanges heat by contacting the heat medium.