JPS5849497Y2 - Temperature stratification type heat storage tank - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a temperature type heat storage tank.

BACKGROUND ART Conventionally, when planning an air conditioning system having a dedicated heat storage tank, construction of the heat storage tank requires considerable cost, so it has been desired to construct a heat storage tank with as high utilization efficiency as possible.

In order to obtain an effective heat storage tank, various types of heat storage tanks have been devised taking into consideration several requirements.

To describe these by type, for example, there are those in which the temperature distribution inside the tank changes in the direction of flow, such as the communicating pipe method, the agitator or circulator method, the moguri-seki method, and the improved moguri-seki method, as well as temperature stratification in which the temperature distribution in the vertical direction. The method is known.

Each of these types of heat storage tanks has its own advantages, but when comparing them in general terms, there are differences in tank characteristics, maintenance and cleaning,
The temperature stratification method is superior in all aspects of construction cost.

However, the disadvantage of this temperature stratification type tank is that changes in the amount of circulating water in the tank are expected to affect the tank internal characteristics, that is, deterioration of efficiency, and in reality, only one or two experimental examples have been carried out.

In addition, the temperature stratification type tank adopted in the experiment example has the tank inlet and detection port facing each other within the tank, that is, installed at both ends of the tank, so as the tank becomes larger, the air conditioning system etc. Operational problems also arise, such as the length of piping to the pump becoming longer and the suction head of the pump becoming higher.

Based on these current circumstances, the inventors of the present invention believe that although theoretically excellent tank characteristics are considered, there is too little technical information regarding the temperature stratified heat storage tank, and that unfounded speculation hinders its practical use. We believe that the above-mentioned problems should be reconsidered, and as a result of a series of studies and studies aimed at resolving these deficiencies, we hereby propose the present invention.

The present invention will be explained below with reference to the drawings showing one embodiment thereof.

As shown in FIGS. 1 to 3, the temperature stratified heat storage tank according to the present invention is provided with a partition wall 1 that stands upright in the longitudinal direction of the tank 9 from one tank wall to at least the center, and this partition wall 1 is the boundary. , a high-temperature water outflow partition wall 3 having an upper opening 2 on one side;
and a low temperature water outflow partition wall 5 having a lower opening 4 on the other side.
In the special temperature stratified heat storage tank, the temperature distribution inside the tank is lower than higher temperature from the top to the bottom, and high temperature water can be added as needed without disturbing this temperature distribution. It is considered best to take out the water from the top and the low-temperature water from the bottom.

Therefore, for example, in order to store heat, heating from the bottom of the tank would be inefficient since heat convection would occur and no layer would be formed, so heating is done from the top.

In this case, it was thought that the water in the tank would not move, and the heat of the high-temperature water would gradually be transferred downward.

For this reason, it has conventionally been thought that in temperature stratification type heat storage tanks, it is not possible to form the tank by bending the tank or to provide a partition wall inside the tank.

However, according to research by the inventors of the present invention, in a tank 9 in which a partition wall 3 having an upper opening 2 is provided on one side and a partition wall 5 having a lower opening 4 on the other side, for example, the upper part of the partition wall 3 When high-temperature water flows out from the opening 2, this high-temperature water forms a layer of a certain thickness and travels along the tank surface, and when it collides with the other partition wall surface 5, it travels back toward the original partition wall surface 3. However, it was found that heat was lost during the reciprocating movement between the two partition walls 3.5, and it gradually sank downward.

It has been found that this phenomenon occurs even if the inside of the tank is formed into a circuit bent by the partition wall 1 as in the present invention, as shown by the arrow in FIG.

Therefore, even if the partition wall 1 is provided in the center of the tank 9 and the circuit of the tank is bent, the temperature distribution inside the tank will not be biased, and the temperature will be maintained from high to low on average from the top to the bottom.

Furthermore, in the present invention, the partition walls 3 and 5 are provided with an upper opening 2 and a lower opening 4, respectively, so that low-temperature water passes through the lower opening 4 into the low-temperature chamber 6, and high-temperature water passes through the upper opening. It passes through part 2 and enters high temperature tank 7.

As described above, in the heat storage tank 9 according to the present invention, the lowest temperature water in the tank is always stored in the low temperature tank 6, and the highest temperature water is always stored in the high temperature tank 7.

Therefore, in the summer, it is possible to efficiently extract cold water from the low temperature tank 6 with a pump, and in the winter, it is possible to efficiently extract hot water from the high temperature tank 7 with a similar pump.

Note that 8 in the figure represents the water surface.

In this way, in the heat storage tank according to the present invention, the entrances and exits of the tanks, which were opposite to each other in conventional experimental examples, are placed adjacent to each other by providing a partition wall, so that even when the tank becomes larger, the piping does not become longer, and the problems of the conventional method are avoided. I was able to clear all the points.

In terms of efficiency, it also satisfies most of the requirements for an effective heat storage tank, such as almost no dead zone, no short circuits, good maintenance and cleaning, and low equipment costs.

The partition wall provided in the tank does not necessarily need to be provided so as to divide the inside of the tank into three equal parts, so that the left and right sides have the same volume, but it is preferable to divide the tank into three equal parts.

In the present invention, the tank may be rectangular, square, or circular.

As described above, by using the temperature stratified heat storage tank according to the present invention, it is possible to realize a heat storage tank with low cost and high efficiency even when a dedicated heat storage tank is constructed when installing an air conditioning system, and it is extremely effective. It's advantageous.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the temperature stratification type heat storage tank of the present invention, Fig. 2 is a top view of the temperature stratification type heat storage tank of the present invention, and Fig. 3 is a sectional view taken along line AA' in Fig. 2. represents. In the figure, 1... Partition wall, 2... Upper opening, 3, 5... Partition wall, 4... Lower opening, 6... ...low temperature tank, 7...high temperature tank,
8...Represents the water surface.

Claims (1)

[Scope of utility model registration request] An upright partition wall is provided in the width direction of the tank at the center of the tank, extending in the longitudinal direction of the tank up to at least the center thereof, and with this partition wall as a boundary, a partition wall with an upper opening on one side for the outflow of high temperature water is provided. A temperature stratification type heat storage tank characterized in that a partition wall for low-temperature water outflow having a lower opening on the other side is provided.