JPH06265184A - Carrying equipment of solid-liquid mixture fluid - Google Patents

Abstract

PURPOSE:To enable precise draining of a liquid by providing latent heat substance mixing filling factor (IPF) regulators on the suction side of a mixture fluid carrying pump and by providing a liquid drain pipe connecting liquid drain ports of the IPF regulators and a heat source storage part together. CONSTITUTION:IPF regulators 3A and 3B provided with liquid drain ports for a solid-liquid fluid of a latent heat substance such as ice and a liquid such as water are provided on a carrying pipeline 7 between an outlet of a heat source storage part 1 and a suction port of a carrying pump 2, while a liquid drain pipeline 16 connecting the liquid drain ports of the IPF regulators 3A and 3B and the heat source storage part 1 together is provided. In this case, the liquid drain pipeline 16 is provided with a pump 5 for making it possible to make the amount of drain variable. As to the IPF regulators 3A and 3B, besides, pipelines are separated into two, upper and lower pipelines, the upper- side separated pipeline is provided continuous to the carrying pipeline 7 and the opposite sides of the lower-side separated pipeline are closed up, while this pipeline is made to function as a liquid drain part for regulation of IPF. According to this constitution, precise draining of the liquid can be executed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is applicable to district cooling, etc.
The present invention relates to a solid-liquid mixed fluid conveying device that conveys cold heat accumulated in a heat source reservoir by a solid-liquid mixed fluid of a latent heat substance such as ice and a liquid such as water.

[0002]

2. Description of the Related Art In district cooling and the like, there is provided a method of transporting sensible heat using a single fluid when transporting cold heat accumulated in a heat source reservoir to a load. On the other hand, in recent years, a method of transferring cold heat by utilizing latent heat in addition to the sensible heat, that is, a method of transferring cold heat by a solid-liquid two-phase mixed fluid (for example, a solid-liquid mixed fluid of ice and brine) is often adopted. Came to be. In such an air conditioning system, the latent heat substance mixture filling rate (hereinafter referred to as "IP
(Referred to as “F”) in accordance with the fluctuation of the load or the fluctuation of the IPF in the heat source reservoir to supply the solid-liquid mixed fluid to the load.

FIG. 4 shows a conventional example of the solid-liquid mixed fluid transfer system. In the figure, reference numeral 1 is a heat source reservoir, that is, an ice tank in which a solid-liquid mixed fluid of ice and water is stored. The solid-liquid mixed fluid in the ice storage tank 1 is added by a transfer pump 2 provided in a transfer main pipe 7. It is discharged under pressure and introduced into the IPF adjuster 14 provided on the discharge side, where a part of the water is extracted and returned to the ice storage tank 1 through the water removal pipe 16. The flow rate of water returned to the ice storage tank 1 is adjusted by detecting the density value of the mass flowmeter 6 provided downstream of the IPF adjuster 14. An example of the IPF control will be described numerically. If the required supply flow rate is Qm ³ / min and the required IPF is 30%, the solid-liquid mixed fluid in the ice storage tank 1, that is, the IPF of the ice water.
Is 10%, the ice water flow rate 3Q in the ice storage tank 1 is pressurized by the transfer pump 2 to a pressure of 4 kg / cm ² · G and is sent out to the main transfer pipe 7, and the IPF adjuster 14 outputs 2Q.
The water flow rate is returned to the ice storage tank 1 through the drainage pipe 16, whereby the ice water flow rate Q with the IPF adjusted to 30% is supplied to the load 9 via the regional conduit 8 to supply cold heat. In addition,
Reference numeral 8a is a return conduit, and 15 is an automatic adjusting valve for controlling the drainage flow rate.

The IPF adjuster 14 is shown in FIG.
As shown in FIG. 5, a pipe made of punching metal is provided in which an outer pipe 142 is surrounded by an inner pipe 141 which is continuously provided with the main transport pipe 7, and the inner pipe 141 is provided with a hole 14b having a diameter of about 0.5 mm. 141, and both ends of the outer pipe 142 are closed and a drainage pipe 16 is provided between them.
It functions as a drainage part for PF adjustment. With such a configuration, the solid-liquid mixed fluid from the ice storage tank 1 is transferred to the regulator 1
4, the IPF is adjusted by extracting only water from the hole 14b of the punching metal and returning it from the water outlet C of the outer pipe 142 to the ice storage tank 1 through the water drainage pipe 16.

[0005]

However, in such a conventional system, the IPF is provided on the discharge side of the carrier pump 2.
Since the regulator 14 is provided, the drainage flow rate returned to the ice storage tank 1 through the drainage pipe 16 is also increased to the supply pressure (3 to 4 kg / cm ² · G) to the load 9. Therefore, useless power is applied to the transfer pump 2.

For example, in FIG. 6, Q0 is a solid-liquid mixed fluid, that is, ice water inlet flow rate, Q1 is water drainage flow rate, Q2 is carrier ice water flow rate, and IPF0, IPF1 and IPF2 are Q0 and QF, respectively.
As the IPF values of 1 and Q2, the relationship between Q1 / Q0 and the amount of increase in IPF of the carrier ice water when IPF0 = 13.4% is graphed by the experimental results. (Note that IPF1 = 0% in the figure represents a curve when ice is not included in the extracted water). As can be seen from the figure, when the value of Q1 / Q0 becomes 0.4 or more, the outflow of ice increases to the side of the drainage pipe 16, so that the drainage flow rate is increased by an amount equivalent to the outflow amount of ice. Must increase. For this reason, the capacity of the transfer pump 2 must be increased by at least the amount of increase in the water drainage amount, and the transfer power of the solid-liquid mixed fluid increases.

Further, since the inner pipe 141 through which the mixed fluid passes is formed of punching metal in the IPF regulator 14, the ice water flowing into the punching metal cylinder (inner pipe) passes through the metal cylinder 141. The outer tube 14
It goes out to the 2 side, IPF is raised, and it flows out. Therefore, the closer to the outlet of the punching metal 141, the higher the IPF, so that the ice agglomerate is likely to stagnate on the outlet side of the regulator 14,
When ice water is continuously passed through the adjuster 14, the IPF
Blockage on the mixed fluid (ice water) side easily occurs in the adjuster 14. It is considered that this is because the pressure loss that occurs when the punching metal cylinder 141 passes through the ice water is about 6 times as large as that in the case of the straight pipe. In view of the above-mentioned drawbacks of the prior art, the present invention provides a mixed fluid transfer device that prevents waste of the transfer pump power and improves the efficiency of the system, and that also prevents clogging of the piping system of the IPF regulator. To aim.

[0008]

According to the present invention, an IPF adjuster having a liquid outlet for the solid-liquid mixed fluid is provided on a transfer conduit between the heat source reservoir outlet and the transfer pump suction port. And a liquid drain pipe line connecting the liquid drain port of the IPF adjuster and the heat source reservoir. In this case, it is preferable that a pump be provided in the liquid drain pipe so that the drain amount can be changed. Further, it is preferable that a plurality of the IPF adjusters are arranged in series in the transfer pipeline. Further, the IPF adjuster separates the conduits constituting the adjuster into two parts vertically through a flat liquid separation plate, and the upper separation conduit is connected to the transfer conduit and the lower separation pipe is connected. It is preferable that both ends on the road side are closed and a liquid drain port is provided to function as a liquid drain portion for IPF adjustment.

[0009]

According to the present invention, since the IPF regulator is provided on the suction side of the transfer pump for transferring the mixed fluid, only the mixed fluid amount corresponding to the required cold heat amount on the load side needs to be transferred by the transfer pump. In other words, the amount of pump power corresponding to the amount of the liquid extracted in the liquid drain pipe is unnecessary. Therefore, a reduction in pump power is achieved as compared to conventional devices. See I
The pipeline that constitutes the PF adjuster is separated into two upper and lower via a flat liquid separation plate, and the upper separation pipeline is connected to the transport pipeline,
Further, since the lower separation pipe side is made to function as a liquid draining portion, the pressure loss that occurs when ice water passes can be greatly reduced, and thus the blockage of the pipe system of the IPF regulator can be effectively prevented. That is, since the specific gravity of ice is lighter than that of water, the ice is transported in a state of floating upward in the upper separation pipeline.
Since only the inner wall of the pipeline exists on the upper side of the upper separation pipeline, and the punch metal (liquid separation plate) exists only on the bottom side, ice does not contact the punching metal and therefore pressure loss is not caused. Absent.

Further, both ends on the side of the lower separation pipe, which functions as a liquid draining portion below the liquid separating plate, are closed. In other words, since water is drained from the water retention portion, draining is easy and accurate. Can be done.

[0011]

Embodiments of the present invention will now be described in detail with reference to the drawings. However, unless otherwise specified, the shape, numerical values, specifications, relative arrangement, etc. of the constituent elements described in this embodiment are not intended to limit the scope of the present invention thereto, but are merely illustrative examples. It is nothing more than a thing. A solid-liquid mixed fluid transfer device according to an embodiment of the present invention will be described. FIG. 1 is a system diagram showing a first embodiment of the present invention,
In the figure, 1 is a heat source reservoir or an ice storage tank for storing a mixed fluid of ice and water (ice water), 7 is a transfer pipeline, 2 is a transfer pump, and the heat source storage part 1 outlet and the transfer pump 2 suction port are shown. A plurality of first and second IPF regulators 3A and 3B having the water drainage ports of the ice water are provided in series on the transport pipe between the IPF regulators 3A and 3B. The drainage branch pipes 11 and 12 are drawn out, respectively, and join the drainage pipe 16 connected to the ice storage tank 1. Reference numeral 5 denotes a water draining pump provided in the water draining pipe 16, which is configured so that the water draining amount can be controlled arbitrarily. In addition, 6 is a mass flow meter, 8
Is a return conduit and 9 is a cold load.

The structure of the IPF adjusters 3A and 3B (hereinafter collectively referred to as "3") will be described with reference to FIG. 3. The conduit 50 forming the IPF adjuster 3 is the transfer conduit 7.
It has a larger diameter, and its axial ends are connected in series via a funnel portion 59. The conduit 50 is divided into two parts, a top plate and a bottom plate, through a punch metal 55 having a flat plate shape.
Attach 6. As a result, the separation conduit 50A above the punch metal 55 is connected to the transfer conduit 7, and both ends of the separation conduit 50B below the punch metal 55 are closed. A water drain port 57 is provided on the bottom side of the separation pipeline 50B, and the branch pipes 11 and 12 are connected to the water drain port 57.

To briefly explain the operation of this embodiment, the ice water in the ice storage tank 1 is stored in the first IPF adjuster 3A and the second IPF adjuster 3B provided in the transfer pipe line 7. After that, it is sucked into the transfer pump 2 and, for example, 4 k
It is pressurized to a pressure of g / cm @ 2 .G and conveyed to the regional conduit 8 via the mass flow meter 6. A large number of cold heat loads 9 are connected to the regional conduit 8. The ice water that gives cold heat to the cold load 9 becomes water and is returned to the ice storage tank 1. Then, the ice is supplied to the ice storage tank 1 by operating the ice making machine 120 (not shown) to make ice by using cheap electric power at night.
In this embodiment, two first and second IPF adjusters 3A and 3B are arranged in series in the conveying pipe line 7.
It is within the scope of the present invention to provide one PF adjuster 3A, 3B or three or more PF adjusters in series.

Next, an IPF adjusting method according to the present invention and an example of the reduction of the carrying power by the method will be described with reference to FIG. Now, it is assumed that the IPF in the ice storage tank 1 is 10%, and it is necessary to raise this to 30% and supply the supply flow rate Qm ³ / min to the cold heat load 9 at the supply pressure 4 kg / cm ² · G. The general formula for the theoretical power of a pump is Q0m ³
/ Min, and the differential pressure before and after the pump is ΔPkg / cm ² , it can be expressed as W = 1.63Q 0 ΔP (kW).

In order to satisfy the above-mentioned requirements, 3Q amount of ice water is taken out from the ice storage tank 1, the number of rotations of the water draining pump 5 is controlled, and QF amount of water is drained by the IPF regulators 3A and 3B, respectively. Return 2Q of water to the ice storage tank 1. The water drainage amount is calculated from the density value of the mass flowmeter 6. On the other hand, the transport pump 2 pressurizes Q amount of ice water to 4 kg / cm ² · G,
This is transported to the regional conduit 8. Pump theoretical power W1
Is the sum of the water draining pump 5 and the transport pump 2 and W1 = 1.63 (2Q × 1 + Q × 4) = 9.78Q.

On the other hand, when the theoretical power W2 of the conventional pump shown in FIG. 4 is calculated under the same conditions as described above as shown in FIG. 8, W2 = 1.63 × 3Q × 4 = 19.56Q Comparing the theoretical pump powers of the present invention and the conventional one, W1 / W2 = 1/2, that is, the present invention makes it possible to halve the transport power of the mixed water as compared with the conventional one.

Further, as described above, by simultaneously draining water from the IPF regulators 3A and 3B, the outflow of ice to the draining side flowing through the upper separation pipeline 50 is small, and the regulators 3A, 3B are also provided. There is no blockage of the flow path on the ice water side.

In the above embodiment, the case of district cooling using ice water was explained, but a heat storage material which causes a state change between water and solid depending on the temperature rise and fall is used as a latent heat substance by putting it in a capsule or the like. A case of performing regional air conditioning using a solid-liquid mixed fluid of water and water will be described with reference to the following embodiments. As a heat storage material that can be used in the IPF regulator,
A capsule (for example, a spherical capsule having a diameter of 20 mm or less) filled with a heat storage material that solidifies (including slurry and gel) at the time of heat storage can be used for safety and corrosion resistance. Table 1 shows such a heat storage material, and Table 2 shows the state when the heat storage agent is used for cooling or heating.
Shown by.

FIG. 2 shows an embodiment of a regional air conditioning system using the above-mentioned capsules as a solid-liquid mixed fluid carrier according to an embodiment of the present invention. In the figure, 9 is a heating or cooling load (cold heat load), 21 is a heat source reservoir, 22 and 23 are IPF regulators, 24 is a transfer pipeline, 25 is a transfer pump, 26 is a drain pipe, and 27 is a drain. Dedicated pump, 28 is an automatic adjustment valve, 29 is a mass flow meter, 30 is a regional conduit, 31 is a circulation pump, 32 is an automatic adjustment valve, 33 is a capsule recovery and regenerator, and 34 is punching of the capsule recovery and regenerator 33. Metal, 35 is a heat pump device, 36 to 40 and 46 are flow pipes,
Reference numerals 41 to 45 are automatic adjusting valves. The heat pump device 35 is switched and used as a cooler during the cooling operation and as a heater during the heating operation.

First, when the heat pump device 35 is operated by using inexpensive nighttime electric power to perform heat storage (cold storage) operation, when the automatic adjustment valve 32 is closed and the liquid temperature in the heat source storage portion 21 is close to the heat storage temperature. The automatic adjustment valves 41 and 45 are opened, the automatic adjustment valves 42, 43 and 44 are closed, and the circulation pump 31 is operated. The water in the heat source reservoir 21 enters the capsule recovery / accumulator 33 through the distribution pipes 36 and 37, and then the distribution pipe 38.
After passing through the heat pump device 35 and being heated here, the heat source device is returned to the heat source reservoir 21 through the flow pipes 39 and 40,
This cycle is repeated. By this circulation, heat (cold heat) is given to the heat storage material enclosed in the capsule in the capsule recovery and heat storage unit 33.

When the outlet temperature of water or the inlet / outlet temperature difference of water in the capsule collection and heat storage unit 33 is detected and the heat storage is completed, the automatic adjusting valves 42 and 43 are opened and the automatic adjusting valves 41 and 41 are opened. The circulation pump 31 is operated with 44 and 45 closed. The water in the heat source reservoir 21 passes through the flow pipe 36, the automatic adjustment valve 43, and flows into the capsule recovery and regenerator 33, and returns to the heat source reservoir 21 through the flow pipe 46 together with the capsules in the regenerator. Accumulate capsules in the reservoir.

The operation under an air conditioning load is performed as follows. The automatic adjustment valve 32 is opened. The transfer pump 25 is operated to set the solid-liquid mixed fluid of the capsule and water in the heat source reservoir 21 to IP.
By introducing it into the F regulators 22 and 23 and operating the pump 27 for exclusive use of liquid removal, an appropriate amount of water is extracted and returned to the heat source reservoir 21. The flow rate for draining water is the mass flow meter 2
It is determined by detecting the density value of 9 and controlling the number of rotations of the pump 27 for exclusive use of liquid removal, or by making the number of rotations of the pump 27 for exclusive use of liquid removal constant and controlling the automatic adjustment valve 28.

In this way, the solid-liquid mixed fluid adjusted to the required IPF is transferred to the regional conduit 30 to transfer heat to and from the load 9, thereby performing air conditioning. When the automatic adjustment valves 41, 42, 43 are closed and the automatic adjustment valves 44 or 45 are opened, the solid-liquid mixed fluid after the heat transfer passes through the capsule recovery and regenerator 33, and then the heat source reservoir through the flow pipe 40. Return to 21. Therefore, the latent heat used capsule in the solid-liquid mixed fluid is captured and accommodated in the capsule collection and heat storage unit 33 by the punching metal 34 having an opening smaller than the diameter of the capsule.

There are two routes for returning the solid-liquid mixed fluid from the capsule collecting and regenerator 33 to the heat source reservoir 21. That is, when the temperature of the solid-liquid mixed fluid is substantially equal to the heat storage temperature, the solid-liquid mixed fluid is returned to the heat source reservoir 21 through the automatic adjustment valve 44, the solid-liquid mixed fluid is used until sensible heat, and the temperature of the heat source reservoir 21 is used. When there is a temperature difference with the heat storage temperature, the solid-liquid mixed fluid enters the heat pump device 35 via the automatic adjustment valve 45, is cooled or heated here to a heat storage temperature, and is then returned to the heat source reservoir 21. It

When the air conditioner operates at full load, it is a general method to use the night operation method and the chasing operation method together. Therefore, at the time of maximum load, the heat storage operation described above is also required, so that the capsule recovery and heat storage unit 3
3 units are installed in parallel and the heat pump device 3 is a patch type.
The cold water or the hot water from 5 is poured into the container where the capsules have been collected, the heat storage operation is performed, and then the capsules that have stored heat by the above method are returned to the heat source storage section 21.

The above embodiment is for district cooling, but the present invention is not limited to this, and includes the case of heating. Therefore, "load" is "cooling load" and "heating load".
And "heat source reservoir" include "ice storage tank" and "high heat source", respectively.

[0027]

As described above, according to the present invention, an IPF regulator is provided on the suction side of a solid-liquid mixed fluid transfer pump,
Since an appropriate amount of water (water) is drained and returned to the heat source reservoir in the regulator, the transport power is significantly reduced compared to the conventional one in which the IPF regulator is provided on the discharge side of the transport pump. can do.

Also, since the IPF regulator can be installed near the heat source reservoir, the flow resistance in the drainage pipe from the regulator to the reservoir is extremely small compared to the regional conduit, so it is dedicated to draining water. Even if a pump is used, the pressurization is about 1 kg / cm ² · G, and the increase in transport power due to it is extremely small.

Further, in the conventional one, in the IPF regulator, when the value of the drainage flow rate / solid-liquid mixed fluid inlet flow rate (the inlet means the inlet of the regulator) becomes 0.4 or more, the drainage is performed. The flow of ice from the side increases and efficiency decreases,
Further, the IPF regulator is likely to be clogged on the mixed fluid side. However, if several IPF regulators are installed in series, the flow rate of water withdrawn from one regulator can be adjusted to a predetermined allowable value (40 %) Or less, it is possible to increase the IPF value even when the ratio is high.
There is no risk of reducing the efficiency of each IPF regulator, and the safe, reliable and efficient operation of the device can be performed. Furthermore, the flow rate of the solid-liquid mixed fluid conveyed to the cold heat load section according to the fluctuation of the cold heat load is controlled by adjusting the operation of the transfer pump, and the operation of the stirrer in the heat source reservoir section is adjusted to adjust the heat source reservoir. Since it is possible to control the IPF of the solid-liquid mixed fluid flowing out of the section,
It is suitable for performing the above-mentioned control steplessly, and can perform highly efficient district heating / cooling operation as in the above case.

The present invention also provides a conduit 5 which constitutes an IPF regulator.
0 is divided into upper and lower parts through a plate-shaped liquid separation plate, the upper separation pipe line 50 is connected to the transfer pipe line, and the lower separation pipe line 50 is connected.
Since the side is made to function as a liquid draining portion, the pressure loss that occurs when ice water passes can be greatly reduced, and thus the blockage of the pipe system of the IPF regulator can be effectively prevented. Further, both ends of the lower separation pipe line 50 side which function as a liquid draining portion below the liquid separating plate are closed, in other words, in order to drain water from the water retention portion,
The water can be drained easily and accurately. It has various remarkable effects.

[Brief description of drawings]

FIG. 1 is a system diagram of a solid-liquid mixed fluid transfer device according to a first embodiment of the present invention.

FIG. 2 is a system diagram of a solid-liquid mixed fluid transfer device according to a second embodiment of the present invention.

3A and 3B show an example of an IPF adjuster applied to the embodiment, FIG. 3A is an overall perspective view, and FIG. 3B is a perspective view of a main part of punching metal.

FIG. 4 is a system diagram showing a conventional transfer device.

FIG. 5 is a schematic sectional view showing an example of a conventional IPF adjuster.

FIG. 6 is a diagram showing the function of a conventional IPF adjuster.

FIG. 7 is an operation explanatory view of the device of the present invention 2;

FIG. 8 is an operation explanatory view of a conventional example.

[Explanation of symbols]

 1 Ice storage tank as heat source storage unit 2 Conveyor pumps 3A, 3B Latent heat substance filling rate regulator (IPF regulator) 5 Drainage pump 7 Conveying pipeline 8 Regional conduit 9 Cold heat load 1a Solid-liquid mixed fluid outlet 1b Drainage pipe 51 Wire mesh or punching metal 52 Stirrer

[Table 1]

[Table 2]

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yukio Hamaoka 2-13-1 Botan, Koto-ku, Tokyo Stock company Maekawa Works (72) Inventor Mitsuru Yamamoto 2-13-1 Botan, Koto-ku, Tokyo Shares Company Maekawa Works (72) Inventor Taiji Ohno 2-13-1 Botan, Koto-ku, Tokyo Stock Company Maekawa Works (72) Inventor Junichi Aizawa 2-31 Botan, Koto-ku, Tokyo Stock Association Inside the company Maekawa Works (72) Inventor Takashi Yokoyama 2-13-1 Botan, Koto-ku, Tokyo Stock company Inside the company Maekawa Works (72) Yamato Morikawa 3-22 Nakanoshima 3-chome, Kita-ku, Osaka, Kansai Electric Power Company Incorporated (72) Inventor Masahiro Miyawaki 3-22 Nakanoshima, Kita-ku, Osaka-shi, Osaka Kansai Electric Power Co., Inc. (72) Inventor Ken Fujimoto 4 Koraibashi, Chuo-ku, Osaka-shi, Osaka Eye No. 6 No. 2, Inc. Nikken Sekkei in (72) inventor Tomohiro Kuriyama, Chuo-ku, Osaka-shi Kōraibashi 4-chome No. 6 No. 2, Inc. Nikken Sekkei in

Claims (2)

[Claims] 1. A carrier for connecting a solid-liquid mixed fluid of a latent heat substance such as ice and a liquid such as water stored in a heat source reservoir such as an ice storage tank, which connects the heat source reservoir with cooling or heating or other load. A solid-liquid mixture which is provided with a transfer pump in the pipe line, which transfers the solid-liquid mixed fluid to the load side by the transfer pump, and returns the mixed fluid to the heat source reservoir side after heat exchange with the load. In the fluid transport device, a latent heat substance mixture filling rate regulator (IPF regulator) having a liquid outlet for the solid-liquid mixed fluid is provided on a transport pipe between the heat source reservoir outlet and the transport pump suction port. A solid-liquid mixed fluid transporting device, characterized in that it is provided with a liquid drain pipe line that connects the liquid drain port of the IPF adjuster and the heat source reservoir. 2. A pipe constituting the IPF adjuster is divided into upper and lower two via a flat liquid separation plate, an upper separation pipe is connected to a carrier pipe, and a lower separation pipe is provided. 2. The solid-liquid mixed fluid transporting device according to claim 1, wherein both ends of the liquid are closed and liquid outlets are provided to function as a liquid draining portion for IPF adjustment.