A floating disc based ladder-shaped heat storage water tank

Abstract

The application provides a ladder-shaped heat storage water tank based on a floating disc, which comprises a heat storage body, a floating disc assembly and a sensing pneumatic assembly. The heat storage body is provided with a water pipeline for inputting or outputting water medium into the heat storage body. The floating disc assembly comprises a floating disc. The floating disc is arranged in the heat storage body. The sensing pneumatic assembly comprises a plurality of temperature sensors and a pneumatic control assembly. The plurality of temperature sensors are arranged on the water pipeline and the upper surface and the lower surface of the floating disc respectively, and are used for transmitting the detected temperature to the pneumatic control assembly. The pneumatic control assembly drives the floating disc to move in the height direction of the heat storage body. In the embodiment of the application, the heat storage body is internally provided with the floating disc. The floating disc can change the position according to the working mode of the heat storage body, optimizes the distribution of the temperature gradient layer in the heat storage body, improves the heat storage and heat release performance of the ladder-shaped heat storage water tank, and solves the problem that the heat storage and heat release energy dissipation of the existing heat storage water tank is large.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat storage, in particular to a ladder-shaped heat storage water tank based on a floating disc. BACKGROUND

[0002] Clean energy such as solar energy is greatly affected by the environment and has low energy utilization efficiency, and energy storage technology has become one of the key technologies to solve this problem. At present, the main energy storage methods include sensible heat storage, latent heat storage and chemical reaction storage. Among them, the sensible heat storage technology is widely used due to its mature technology, easy construction and low cost. In the process of heat storage and release, there will be a temperature gradient at the junction of the cold and hot fluids in the heat storage water tank, which is called the temperature gradient layer. In actual engineering, the temperature gradient layer is an important indicator for evaluating the heat storage efficiency of a heat storage water tank system. The temperature gradient layer in the water tank will thicken due to heat conduction between cold and hot water, resulting in a decrease in the available heat working medium stored in the heat storage water tank. Therefore, it is of great significance to improve the heat storage and release performance of the heat storage water tank and solve the problem of large energy dissipation in the heat storage and release process of the existing heat storage water tank. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the related art to some extent.

[0004] To this end, the present application proposes a ladder-shaped heat storage water tank based on a floating disc, which has a floating disc inside the heat storage body. The floating disc can change its position according to the working mode of the heat storage body to optimize the temperature gradient layer distribution in the heat storage body, improve the heat storage and release performance of the ladder-shaped heat storage water tank, and solve the problem of large energy dissipation in the heat storage and release process of the existing heat storage water tank.

[0005] To achieve the above-mentioned purpose, the present application proposes a ladder-shaped heat storage water tank based on a floating disc, which comprises:

[0006] a heat storage body for storing water medium for heat storage; a water pipeline is arranged on the heat storage body for inputting or outputting water medium into or out of the heat storage body;

[0007] a floating disc assembly comprising a floating disc; wherein the floating disc is arranged in the heat storage body; and

[0008] a sensing pneumatic assembly comprising a plurality of temperature sensors and a pneumatic control assembly; a plurality of temperature sensors are arranged on the water pipeline and the upper and lower surfaces of the floating disc, respectively, for transmitting the detected temperature to the pneumatic control assembly; the pneumatic control assembly is connected with the floating disc to drive the floating disc to move in the height direction of the heat storage body.

[0009] In some embodiments, the water pipeline includes an upper water pipeline and a lower water pipeline in communication with the heat storage body; wherein the upper water pipeline and the lower water pipeline are respectively arranged at the top and bottom of the heat storage body; the first temperature sensor and the second temperature sensor are respectively arranged on the upper water pipeline and the lower water pipeline.

[0010] In some embodiments, the floating disc assembly further comprises a lifting shaft connected with the floating disc, and the pneumatic control assembly is connected with the lifting shaft to drive the lifting shaft.

[0011] In some embodiments, the lifting shaft is a plurality of lifting shafts arranged around the floating disc.

[0012] In some embodiments, the third temperature sensor and the fourth temperature sensor are respectively arranged on the middle part of the upper surface and the lower surface of the floating disc; and the third temperature sensor and the fourth temperature sensor are both located on the inner side of the plurality of lifting shafts.

[0013] In some embodiments, the projection of the upper water pipeline and the lower water pipeline on the floating disc is located in the middle part of the floating disc.

[0014] In some embodiments, the floating disc has a contraction gap with the inner wall of the heat storage body.

[0015] In some embodiments, the cross-sectional area of the heat storage body gradually decreases from top to bottom in the height direction.

[0016] In some embodiments, a method for optimizing the distribution of the thermocline based on the floating disc ladder-shaped heat storage water tank is provided, including a heat storage working mode and a heat release working mode:

[0017] Heat storage working mode: high-temperature water medium flows into the heat storage body from the upper water pipeline, the first temperature sensor detects the temperature change and outputs a signal to the pneumatic control assembly, the pneumatic control assembly drives the floating disc to rise until the third temperature sensor can monitor the temperature of the high-temperature water medium, and then outputs a signal to the pneumatic control assembly to make the position of the floating disc constant, until the water medium temperatures detected by the first temperature sensor and the second temperature sensor are consistent, and the heat storage is completed.

[0018] Heat release working mode: low-temperature water medium flows into the heat storage body through the lower water pipeline, the second temperature sensor detects the temperature change and outputs a signal to the pneumatic control assembly, the pneumatic control assembly drives the floating disc to descend until the fourth temperature sensor can monitor the temperature of the low-temperature water medium, and then outputs a signal to the pneumatic control assembly to make the position of the floating disc constant, until the water medium temperatures detected by the first temperature sensor and the second temperature sensor are consistent, and the heat release is completed.

[0019] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the accompanying drawings, wherein:

[0021] Figure 1 is a structural schematic diagram of a new composite water storage medium tank proposed by an embodiment of the present application;

[0022] Figure 2 is a structural schematic diagram of a new composite water storage medium tank proposed by an embodiment of the present application;

[0023] Figure 3 is a structural schematic diagram of a new composite water storage medium tank proposed by an embodiment of the present application;

[0024] In the figure, 1 is an upper water pipeline, 2 is a heat storage body outer wall, 3 is a heat storage body inner wall, 4 is a floating disc, 5 is a lifting shaft, 6 is a lower water pipeline, 7 is a fourth temperature sensor, 8 is a second temperature sensor, 9 is a pneumatic control assembly, 10 is a first temperature sensor, and 11 is a third temperature sensor. DETAILED DESCRIPTION

[0025] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application. On the contrary, the embodiments of the present application include all changes, modifications and equivalents falling within the spirit and scope of the appended claims.

[0026] Reference Figure 1 is a ladder-shaped heat storage water tank based on a floating disc proposed by the present application, which comprises a heat storage body, a floating disc 4 assembly and a sensing pneumatic assembly:

[0027] The heat storage body is used for storing water medium heat storage; the heat storage body is provided with a water pipeline for inputting or outputting water medium into the heat storage body;

[0028] Specifically, the heat storage body can be understood as a profile structure with a certain accommodating space, which is made of a material not easy to conduct heat, so as to prevent the heat of the water medium stored therein from being quickly exchanged with the air around the heat storage body. Exemplarily, the heat storage body is made of foamed plastic, mineral wool product, foamed glass, expanded perlite heat insulation product, which is a hollow regular shape structure capable of accommodating sufficient water medium for heat storage, such as Figure 2The heat storage body shown is an inverted trapezoidal structure, but it can also be a cylindrical or cubic structure. The heat storage body has a certain thickness, including the outer wall 2 and the inner wall 3 of the heat storage body. A heat storage body with a certain thickness has a better heat preservation effect.

[0029] The thermal storage unit is equipped with water pipes, which are connected to the thermal storage unit and include valves and pumps. These pipes are used to introduce water into the thermal storage unit for heat storage and to discharge water when needed. An example is... Figure 1 As shown, in some schemes, the water supply pipes include an upper water supply pipe 1 and a lower water supply pipe 6; wherein the upper water supply pipe 1 and the lower water supply pipe 6 are respectively located at the top and bottom of the thermal storage body. The water supply pipes, including the upper water supply pipe 1 and the lower water supply pipe 6, are designed based on the distribution of the cold water medium within the thermal storage body. In other words, the thermal storage body initially contains a certain volume and temperature of water medium. When the thermal storage body is in heat storage mode, the higher temperature water medium can flow into the thermal storage body from the upper water supply pipe 1, while the lower temperature water medium within the thermal storage body can flow out from the lower water supply pipe 6 in the initial stage. When the temperature of the water medium flowing out of the lower water supply pipe 6 and the water medium flowing into the upper water supply pipe 1 tend to be the same, the heat storage performance of the thermal storage body reaches its limit, and the input of the higher temperature water medium into the thermal storage body stops. When the thermal storage body is in heat release mode, the lower temperature water medium can flow into the thermal storage body from the lower water supply pipe 6, while the higher temperature water medium within the thermal storage body can flow out from the upper water supply pipe 1 in the initial stage. When the temperature of the water medium flowing out of the upper water supply pipe 1 and the water medium flowing into the lower water supply pipe 6 tend to be the same, the heat release performance of the thermal storage body reaches its limit, and the input of the higher temperature water medium into the thermal storage body stops.

[0030] The floating disk 4 assembly includes a floating disk 4; wherein the floating disk 4 is disposed within the heat storage body.

[0031] The specific floating disk 4 component includes a floating disk 4, which is installed inside the heat storage body. The floating disk 4 can move up and down in the height direction of the heat storage body by adjusting the sensor pneumatic component. It is known that the floating disk 4 is made of a material that is not a good conductor of heat, such as foam plastic, mineral wool products, foam glass, or expanded perlite insulation products.

[0032] The sensing pneumatic assembly includes multiple temperature sensors and a pneumatic control assembly 9. The multiple temperature sensors are respectively installed on the water pipe and on the upper and lower surfaces of the floating disk 4, and are used to transmit the detected temperature to the pneumatic control assembly 9. The pneumatic control assembly 9 is connected to the floating disk 4 and drives the floating disk 4 to move in the height direction of the thermal storage body.

[0033] Specifically, the sensing pneumatic assembly comprises a plurality of temperature sensors and a pneumatic control assembly 9, wherein the plurality of temperature sensors are respectively arranged on the water passage pipes and the upper and lower surfaces of the floating disc 4, i.e., the first temperature sensor 10 and the second temperature sensor 8 are respectively arranged on the upper water passage pipe 1 and the lower water passage pipe 6; the third temperature sensor 11 and the fourth temperature sensor 7 are respectively arranged on the upper and lower surfaces of the floating disc 4; wherein the first temperature sensor 10 and the second temperature sensor 8 arranged on the upper water passage pipe 1 and the lower water passage pipe 6 can accurately determine the working state of the heat storage body, and further control the influence of the water medium flowing through the upper water passage pipe 1 and the lower water passage pipe 6 on the performance of the heat storage body. In addition, the heat storage body is provided with the floating disc 4, and the floating disc 4 can change the position according to the working mode of the heat storage body, further reducing the influence of the input water medium or the output water medium on the thermocline of the heat storage body, improving the heat storage and heat release performance of the ladder-shaped heat storage water tank, and solving the problem of large energy dissipation of the existing heat storage water tank.

[0034] In some embodiments, the floating disc 4 assembly further comprises a lifting shaft 5, the lifting shaft 5 is connected with the floating disc 4, and the pneumatic control assembly 9 is connected with the lifting shaft 5 to drive the lifting shaft 5.

[0035] Specifically, the floating disc 4 assembly further comprises a lifting shaft 5, wherein one end of the lifting shaft 5 is connected with the floating disc 4, the other end is mechanically connected with the pneumatic control assembly 9, and the pneumatic control assembly 9 can drive the lifting shaft 5 to elongate or contract, so as to realize the vertical up-down movement of the floating disc 4 connected with the lifting shaft 5 along the height direction of the heat storage body. As shown in the example Figure 2 The lifting shaft 5 is a plurality of, wherein the floating disc 4 is a rectangular structure, and a plurality of floating discs 4 can be respectively arranged at the edges of the floating disc 4. Preferably, the lifting shaft 5 is located at the bottom of the floating disc 4, and the pneumatic control assembly 9 is used to simultaneously control the elongation or contraction of the plurality of floating discs 4, so that the floating disc 4 is more stable during the lifting movement.

[0036] In some embodiments, the third temperature sensor 11 and the fourth temperature sensor 7 are respectively arranged on the middle portions of the upper and lower surfaces of the floating disc 4; and the third temperature sensor 11 and the fourth temperature sensor 7 are both located on the inner side of the plurality of lifting shafts 5.

[0037] Specifically, the third temperature sensor 11 and the fourth temperature sensor 7 are arranged on the middle of the upper surface and the lower surface of the floating disc 4 respectively, so as to monitor the temperature of the fluid such as water medium on the upper surface and the lower surface of the floating disc 4. In order to ensure that the third temperature sensor 11 and the fourth temperature sensor 7 can quickly monitor the temperature change of the water medium in the heat storage body, the third temperature sensor 11 and the fourth temperature sensor 7 are arranged on the middle of the upper surface and the lower surface of the floating disc 4. In addition, the projection of the upper water pipeline 1 and the lower water pipeline 6 on the floating disc 4 is located in the middle of the floating disc 4, that is, the input port of the upper water pipeline 1 and the lower water pipeline 6 is located in the middle of the floating disc 4, and corresponds to the positions of the third temperature sensor 11 and the fourth temperature sensor 7.

[0038] In some embodiments, the floating disc 4 and the inner wall of the heat storage body have a contraction gap.

[0039] Specifically, the floating disc 4 and the inner wall of the heat storage body have a contraction gap in the embodiment. It can be understood that the heat storage body in the embodiment is a trapezoidal structure or an inverted trapezoidal structure, and the floating disc 4 is a directional structure with a certain thickness. The distance between the floating disc 4 and the inner wall 3 of the heat storage body is different in the height direction of the heat storage body, so the gap between the floating disc 4 and the inner wall 3 of the heat storage body is a contraction gap. As shown in the example Figure 2 The heat storage body in the embodiment is an inverted trapezoidal structure, which can reduce the mutual disturbance between the cold and hot fluids in the heat storage body. The cross-sectional area of the contraction gap between the floating disc 4 and the inner wall 3 of the heat storage body gradually decreases from top to bottom in the height direction of the heat storage body. The setting of the contraction gap in the embodiment reduces the influence of the accumulated scale on the movement of the floating disc 4 during long-term operation of the heat storage body and the floating disc 4. When the floating disc 4 moves upward, the scale is brought out to avoid the lifting shaft 5 from being stuck.

[0040] In addition, in some schemes, the floating disc 4 has a certain thickness, and is used to drop the input water medium into the floating disc 4 for the first time. In the initial working stage of the trapezoidal heat storage tank, the input water medium and the original water medium in the heat storage body are prevented from directly contacting each other, so as to reduce the energy dissipation of the trapezoidal heat storage tank during heat storage and heat release. Therefore, in some schemes, the floating disc 4 and the inner wall of the heat storage body have a contraction gap. The heat storage body can also be a square structure, and the floating disc 4 can be a trapezoidal structure or an inverted trapezoidal structure as shown in the example Figure 3 The other features are the same as described above and will not be described again.

[0041] In some embodiments, a method for optimizing the distribution of the inclined temperature layer based on the trapezoidal heat storage tank of the floating disc 4 is provided, which includes a heat storage working mode and a heat release working mode.

[0042] Heat storage mode: high-temperature water medium flows into the heat storage body from the upper water pipe 1, the first temperature sensor 10 detects the temperature change and outputs a signal to the pneumatic control assembly 9, the pneumatic control assembly 9 drives the floating disc 4 to rise to the third temperature sensor 11 can monitor the temperature of the high-temperature water medium, and outputs a signal to the pneumatic control assembly 9, so that the position of the floating disc 4 is constant, until the water medium temperatures detected by the first temperature sensor 10 and the second temperature sensor 8 are consistent, the heat storage is completed;

[0043] Heat release mode: low-temperature water medium flows into the heat storage body through the lower water pipe 6, the second temperature sensor 8 detects the temperature change and outputs a signal to the pneumatic control assembly 9, the pneumatic control assembly 9 drives the floating disc 4 to descend to the fourth temperature sensor 7 can monitor the temperature of the low-temperature water medium, and outputs a signal to the pneumatic control assembly 9, so that the position of the floating disc 4 is constant, until the water medium temperatures detected by the first temperature sensor 10 and the second temperature sensor 8 are consistent, the heat release is completed.

[0044] It should be noted that in the description of the present application, the terms "first", "second", etc. are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0045] Any process or method descriptions in flow charts or described elsewhere herein can be understood as representing code modules, segments, or portions of code that include one or more executable instructions for performing specific logic functions or steps in the process, and the various embodiments of the application contemplate that the order of the steps can be rearranged or otherwise modified, including according to the functions involved, without departing from the principles of the present application, which should be understood in view of the teachings herein.

[0046] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0047] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A floating disc based ladder shaped hot water storage tank characterized by, The application relates to a heat storage device, which comprises the following parts: a heat storage body for storing water medium heat storage; a water pipeline is arranged on the heat storage body for inputting or outputting water medium into or out of the heat storage body; a floating disc assembly, which comprises a floating disc; the floating disc is arranged in the heat storage body; and a sensing pneumatic assembly, which comprises a plurality of temperature sensors and a pneumatic control assembly; the plurality of temperature sensors are respectively arranged on the water pipeline and upper and lower surfaces of the floating disc, and are used for transmitting detected temperatures to the pneumatic control assembly; the pneumatic control assembly is connected with the floating disc to drive the floating disc to move in the height direction of the heat storage body.

2. A floating disc based ladder type thermal storage water tank as claimed in claim 1, wherein, The water pipeline comprises an upper water pipeline and a lower water pipeline which are in communication with the heat storage body; the upper water pipeline and the lower water pipeline are respectively arranged at the top and bottom of the heat storage body; first and second temperature sensors are respectively arranged on the upper water pipeline and the lower water pipeline.

3. A floating disc based ladder type thermal storage water tank as claimed in claim 2, wherein, The floating disc assembly further comprises a lifting shaft, the lifting shaft is connected with the floating disc, and the pneumatic control assembly is connected with the lifting shaft to drive the lifting shaft.

4. A floating disc based ladder type thermal storage water tank as claimed in claim 3, wherein, The lifting shaft is a plurality of lifting shafts which are respectively arranged around the floating disc.

5. A floating disc based ladder type thermal storage water tank as claimed in claim 4, wherein, Third and fourth temperature sensors are respectively arranged on the middle parts of the upper and lower surfaces of the floating disc; and the third and fourth temperature sensors are both located on the inner sides of the plurality of lifting shafts.

6. A floating disc based ladder type thermal storage water tank as claimed in claim 4 wherein, The projections of the upper water pipeline and the lower water pipeline on the floating disc are located in the middle part of the floating disc.

7. A floating disc based ladder type thermal storage tank as claimed in any one of claims 1 to 6, wherein, The floating disc and the inner wall of the heat storage body have a contraction gap.

8. A floating disc based ladder type thermal storage water tank as claimed in claim 7, wherein, The cross-sectional area of the heat storage body gradually decreases from top to bottom in the height direction.

9. The method of optimizing thermocline distribution using the floating disc based ladder shaped thermal storage water tank as claimed in claim 5, wherein, The heat storage device comprises a heat storage mode and a heat release mode: In the heat storage mode, high-temperature water medium flows into the heat storage body from the upper water pipeline; when the first temperature sensor detects a temperature change, a signal is output to the pneumatic control assembly; the pneumatic control assembly drives the floating disc to ascend until the third temperature sensor can monitor the temperature of the high-temperature water medium; a signal is output to the pneumatic control assembly so that the position of the floating disc is constant; when the temperatures of the water medium detected by the first and second temperature sensors are consistent, the heat storage is completed; In the heat release mode, low-temperature water medium flows into the heat storage body through the lower water pipeline; when the second temperature sensor detects a temperature change, a signal is output to the pneumatic control assembly; the pneumatic control assembly drives the floating disc to descend until the fourth temperature sensor can monitor the temperature of the low-temperature water medium; a signal is output to the pneumatic control assembly so that the position of the floating disc is constant; when the temperatures of the water medium detected by the first and second temperature sensors are consistent, the heat release is completed.

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