Variable-tube-spacing radiant cooling phase change energy storage wall

Abstract

A variable-pipe-interval radiant cooling phase change energy storage wall is characterized by comprising an outer decoration layer, a heat preservation layer, a concrete layer, a radiant cooling phase change layer and an inner decoration layer which are sequentially arranged from outside to inside, heat exchange pipes arranged at variable pipe intervals are laid in the radiant cooling phase change layer, and each heat exchange pipe arranged at variable pipe intervals comprises a water inlet end and a water outlet end. The variable-tube-spacing radiant cooling system is combined with the phase change energy storage wall body, so that the problems that a traditional phase change energy storage wall body cannot dynamically respond to outdoor climate changes and the phase change period is too long are solved, and meanwhile, temperature nonuniformity existing at the tail end of a traditional radiant cooling system is avoided; therefore, the heat regulation and control capability of the phase change energy storage wall on the indoor environment is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of radiation cooling, and in particular relates to a radiation cooling phase-change energy storage wall with variable tube spacing. Background Art

[0002] Radiant cooling systems and phase-change energy storage technology, two energy-saving technologies, have been widely used in the construction industry. Radiant cooling systems primarily distribute cooling evenly throughout a space through radiant heat transfer, offering higher energy efficiency and greater thermal comfort than traditional convection cooling systems. However, radiant cooling systems are often limited in their cooling capacity due to condensation. The addition of phase-change energy storage technology can improve the thermal inertia of radiant cooling terminals and, by storing cooling energy during off-peak electricity price periods, address the issue of insufficient cooling capacity during peak hours.

[0003] Currently, traditional passive phase-change energy storage walls have certain limitations, primarily an inability to dynamically respond to outdoor climate changes and a prolonged phase-change cycle, resulting in limited thermal control capabilities. The combination of phase-change energy storage and radiant cooling technology offers a solution to these issues. However, due to the fixed spacing of the heat exchange tubes at the end of traditional radiant cooling systems, temperature distribution is uneven, resulting in poor temperature control in localized areas. This problem causes the phase-change cycle to lengthen in certain areas when the phase-change wall is cooled and regenerated by radiant cooling, thereby compromising the thermal control capabilities of the phase-change energy storage wall.

[0004] The technical solution disclosed in the patent application number CN202223142390.5, entitled "A Composite Phase Change Energy Storage Wall with Embedded Capillary Radiant Cooling and Heating," combines a capillary radiant cooling and heating system with a phase change energy storage wall to address the problems of traditional phase change energy storage walls' inability to actively adjust the amount of stored heat and their inability to meet the needs of integrated cooling and heating. This also avoids the low energy efficiency and high operating costs of traditional radiant cooling and heating systems. However, its disadvantage is that the heat exchange tubes at the end of the radiant cooling and heating system are arranged at equal intervals, resulting in uneven surface temperature distribution on the phase change energy storage wall corresponding to the water inlet and outlet. This results in differences in the energy storage period at local locations in the phase change layer, reducing the phase change energy storage wall's ability to regulate the indoor thermal environment.

[0005] In a radiant cooling phase-change energy storage wall, the regeneration of the phase-change layer primarily depends on the contact between the radiant cooling terminals and the phase-change layer. Therefore, optimizing the placement of radiant cooling terminals can help improve the thermal efficiency of the phase-change energy storage wall, thereby achieving building energy conservation. To this end, this utility model optimizes the design of radiant cooling terminals and proposes a radiant cooling phase-change energy storage wall with variable tube spacing. By combining radiant cooling terminals with a phase-change energy storage wall, the shortcomings of traditional passive phase-change energy storage walls and radiant cooling systems are addressed. Utility Model Content

[0006] In response to the above-mentioned defects, the purpose of the present invention is to propose a phase-change energy storage wall with variable tube spacing radiant cooling, which combines the variable tube spacing radiant cooling system with the phase-change energy storage wall. It not only solves the problem that the traditional phase-change energy storage wall cannot dynamically respond to outdoor climate changes and the phase change cycle is too long, but also avoids the temperature unevenness at the end of the traditional radiant cooling system, thereby improving the phase-change energy storage wall's ability to regulate the thermal environment of the indoor environment.

[0007] To achieve this purpose, the present invention adopts the following technical solutions:

[0008] A variable tube spacing radiant cooling phase change energy storage wall comprises an outer decorative layer, an insulation layer, a concrete layer, a radiant cooling phase change layer, and an inner decorative layer arranged in sequence from the outside to the inside. Heat exchange tubes arranged with variable tube spacing are laid in the radiant cooling phase change layer. The heat exchange tubes arranged with variable tube spacing include a water inlet end and a water outlet end.

[0009] Preferably, the heat exchange tubes arranged with variable tube spacing are made of a heat exchange tube bent in an "S" shape, and the heat exchange tubes arranged with variable tube spacing are mainly composed of multiple straight segments, and the multiple straight segments are connected by curved segments. The multiple straight segments are arranged in parallel on the same plane, and the spacing between the straight segments gradually decreases from the water inlet end to the water outlet end, and the decreasing distance is unequal or equal.

[0010] The phase change material used in the radiation cooling phase change layer is a high thermal conductivity composite shape-fixed phase change material, the phase change temperature of the high thermal conductivity composite shape-fixed phase change material is 24-26° C., and the thickness of the radiation cooling phase change layer is 25-40 mm.

[0011] Wherein, the outer decorative layer and the inner decorative layer are both fiber-reinforced plaster layers.

[0012] In addition, at least one section of the heat exchange tubes arranged with variable tube spacing is provided with exchange fins;

[0013] The exchange fin includes a sleeve portion and an extension portion, the extension portion is integrally provided with the sleeve portion, and the extension portion is strip-shaped.

[0014] In addition, the exchange fins are made of aluminum, and the side wall of the sleeve portion is provided with openings connected to the upper and lower ends of the sleeve portion;

[0015] The sleeve portion is sleeved on the heat exchange tube arranged with a variable tube pitch, and the sleeve portion is fastened to the outside of the heat exchange tube arranged with a variable tube pitch by a metal tie.

[0016] In addition, the inner surface of the sleeve portion is in contact with the heat exchange tubes arranged with a variable tube pitch, and thermal conductive silicone grease is filled between the sleeve portion and the heat exchange tubes arranged with a variable tube pitch.

[0017] One of the above-mentioned technical solutions includes the following beneficial effects: This variable-pipe spacing radiant cooling phase-change energy storage wall, by combining variable-pipe spacing radiant cooling terminals with the phase-change wall, addresses the issues of traditional phase-change energy storage walls' inability to dynamically respond to outdoor climate changes and excessively long phase-change cycles. By introducing active energy, it effectively reduces energy dissipation in the energy transfer process, improves cooling capacity utilization, and thus reduces summer operating energy consumption in buildings. This variable-pipe spacing radiant cooling phase-change energy storage wall, by optimizing the placement of radiant cooling terminals, addresses the uneven heat exchange caused by the inlet and outlet temperature differences, resulting in a uniform temperature distribution on the wall's inner surface and improving the thermal efficiency of the phase-change energy storage wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the four-row variable-tube-spacing radiant cooling phase-change energy storage wall of the utility model;

[0019] Figure 2 This is a schematic diagram of the overall structure of the five-row variable-tube-spacing radiation cooling phase-change energy storage wall of the utility model;

[0020] Figure 3 This is a schematic diagram of the overall structure of the six-row variable-tube-spacing radiant cooling phase-change energy storage wall of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the radiant cooling terminal with four rows of variable tube spacing according to the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the radiant cooling terminal with five rows of variable tube spacing according to the utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the radiant cooling terminal with six rows of variable tube spacing according to the utility model;

[0024] Figure 7 This is a schematic diagram of the installation of exchange fins on heat exchange tubes arranged with variable tube spacing according to the present invention;

[0025] Figure 8 This is a schematic structural diagram of the exchange fins of the present invention.

[0026] Among them: outer decorative layer 1, insulation layer 2, concrete layer 3, radiant cooling phase change layer 4, inner decorative layer 5, heat exchange tubes with variable tube spacing 6, water inlet end 7, water outlet end 8, exchange fins 9, sleeve part 91, and extension part 92. DETAILED DESCRIPTION

[0027] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0028] like Figure 1-6 As shown, a variable tube spacing radiant cooling phase change energy storage wall includes an outer decorative layer 1, an insulation layer 2, a concrete layer 3, a radiant cooling phase change layer 4, and an inner decorative layer 5, which are arranged in sequence from the outside to the inside. Heat exchange tubes 6 arranged with variable tube spacing are laid in the radiant cooling phase change layer 4. The heat exchange tubes 6 arranged with variable tube spacing include a water inlet end 7 and a water outlet end 8.

[0029] This variable-pipe spacing radiant cooling phase-change energy storage wall, by combining variable-pipe spacing radiant cooling terminals with the phase-change wall, addresses the issues of traditional phase-change energy storage walls' inability to dynamically respond to outdoor climate changes and excessively long phase-change cycles. By incorporating active energy, it effectively reduces energy dissipation during energy transfer, improves cooling capacity utilization, and thus reduces summer operating energy consumption. By optimizing the placement of radiant cooling terminals, this variable-pipe spacing radiant cooling phase-change energy storage wall addresses the uneven heat exchange caused by the temperature difference between the inlet and outlet water points, resulting in a uniform temperature distribution on the wall's inner surface and improving the thermal efficiency of the phase-change energy storage wall.

[0030] Depend on Figure 7 As shown, the variable tube spacing arrangement heat exchange tube 6 is made of a heat exchange tube bent in an "S" shape. The variable tube spacing arrangement heat exchange tube 6 is mainly composed of multiple straight segments, and the multiple straight segments are connected by curved segments. The multiple straight segments are arranged in parallel on the same plane, and the spacing between the straight segments gradually decreases from the water inlet end 7 to the water outlet end 8, and the decreasing distance is unequal or equal.

[0031] A pipeline is bent to form heat exchange tubes 6 arranged with variable tube spacing, which facilitates the installation of the device.

[0032] In addition, the phase change material used in the radiation cooling phase change layer 4 is a high thermal conductivity composite shape-fixed phase change material, the phase change temperature of the high thermal conductivity composite shape-fixed phase change material is 24-26°C, and the thickness of the radiation cooling phase change layer 4 is 25-40mm.

[0033] In addition, the outer decorative layer 1 and the inner decorative layer 5 are both fiber-reinforced plaster layers.

[0034] In addition, at least one section of the heat exchange tubes 6 arranged with variable tube spacing is provided with exchange fins 9;

[0035] The exchange fin 9 includes a sleeve portion 91 and an extension portion 92 . The extension portion 92 is integrally provided with the sleeve portion 91 , and the extension portion 92 is strip-shaped.

[0036] The function of the exchange fins is to improve the uniform contact between the heat exchange tubes 6 arranged with variable tube spacing and the radiation cooling phase change layer 4. Since the exchange fins 9 can be easily installed between the heat exchange tubes 6, after the overall arrangement of the heat exchange tubes 6 with variable tube spacing is completed, according to the uniformity of the overall heat exchange effect, the local heat exchange effect can be changed by adding exchange fins 9 locally, and finally the overall uniform heat exchange effect can be adjusted.

[0037] Depend on Figure 8 As shown, the exchange fin 9 is made of aluminum, and the side wall of the sleeve portion 91 is provided with openings connected to the upper and lower ends of the sleeve portion 91;

[0038] The sleeve portion 91 is sleeved on the heat exchange tube 6 arranged with a variable tube pitch, and the sleeve portion 91 is fastened to the outside of the heat exchange tube 6 arranged with a variable tube pitch by a metal tie 93 .

[0039] The metal cable tie 93 is easy to install.

[0040] In addition, the inner surface of the sleeve portion 91 is in contact with the heat exchange tubes 6 arranged with a variable tube pitch, and thermal conductive silicone grease is filled between the sleeve portion 91 and the heat exchange tubes 6 arranged with a variable tube pitch.

[0041] The thermal grease further fills the gap between the sleeve portion 91 and the heat exchange tubes 6 arranged with a variable tube pitch, thereby improving the heat exchange efficiency.

[0042] In the embodiment of the present invention, the heat exchange tubes 6 arranged with variable tube spacing are formed by bending a tube to form a plurality of "U"-shaped and "n"-shaped variable tube spacings. Figure 4 As shown, the number of rows and lengths of the heat exchange tubes 6 arranged with variable tube spacing can be changed according to the needs of the actual project. In a wall with a length and width of L×W, the relationship between the dimensions is as follows:

[0043] ①e1>e2>e3,e1-e2=e2-e3;

[0044] ②e1>e2>e3,e1-e2>e2-e3;

[0045] ③e1>e2>e3,e1-e2 <e2-e3;

[0046] Among them, the five rows of variable tube spacing ceiling radiation panel tubes are arranged as follows Figure 5 As shown, the number of rows and lengths of the heat exchange tubes 6 arranged with variable tube spacing can be changed according to the needs of the actual project. In a wall with a length and width of L×W, the relationship between the dimensions is as follows:

[0047] ①e1>e2>e3>e4, e1-e2=e2-e3=e3-e4;

[0048] ②e1>e2>e3>e4,e1-e2>e2-e3>e3-e4;

[0049] ③e1>e2>e3>e4,e2-e3>e1-e2>e3-e4;

[0050] ④e1>e2>e3>e4,e1-e2>e3-e4>e2-e3;

[0051] ⑤e1>e2>e3>e4,e1-e2>e2-e3=e3-e4;

[0052] ⑥e1>e2>e3>e4,e2-e3>e1-e2=e3-e4;

[0053] Among them, the six rows of variable tube spacing ceiling radiation panel tubes are arranged as follows Figure 6 As shown, the number of rows and lengths of the heat exchange tubes 6 arranged with variable tube spacing can be changed according to the needs of the actual project. In a wall with a length and width of L×W, the relationship between the dimensions is as follows:

[0054] ①e1>e2>e3>e4>e5, e1-e2=e2-e3=e3-e4=e4-e5;

[0055] ②e1>e2>e3>e4>e5,e1-e2>e2-e3>e3-e4>e4-e5;

[0056] ③e1>e2>e3>e4>e5,e1-e2>e3-e4>e2-e3>e4-e5;

[0057] ④e1>e2>e3>e4>e5,e1-e2>e3-e4>e4-e5>e2-e3;

[0058] ⑤e1>e2>e3>e4>e5,e1-e2>e2-e3>e4-e5>e3-e4;

[0059] ⑥e1>e2>e3>e4>e5,e2-e3>e1-e2>e3-e4>e4-e5;

[0060] ⑦e1>e2>e3>e4>e5,e2-e3>e1-e2>e4-e5>e3-e4;

[0061] ⑧e1>e2>e3>e4>e5,e1-e2>e2-e3>e3-e4=e4-e5;

[0062] ⑨e1>e2>e3>e4>e5,e1-e2>e3-e4>e2-e3=e4-e5;

[0063] ⑩e1>e2>e3>e4>e5,e2-e3>e1-e2>e3-e4=e4-e5;

[0064] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will be able to devise other specific implementations of the present invention without inventive effort, and such implementations will fall within the scope of protection of the present invention.

Claims

1. A phase-change energy storage wall with variable tube spacing for radiant cooling, characterized in that: It includes an outer decorative layer, an insulation layer, a concrete layer, a radiant cooling phase change layer, and an inner decorative layer arranged in sequence from the outside to the inside. Heat exchange tubes arranged with variable tube spacing are laid in the radiant cooling phase change layer. The heat exchange tubes arranged with variable tube spacing include a water inlet end and a water outlet end.

2. The phase-change energy storage wall with variable tube spacing for radiant cooling according to claim 1 is characterized in that: The variable tube spacing arrangement heat exchange tube is made of a heat exchange tube bent in an "S" shape. The variable tube spacing arrangement heat exchange tube is mainly composed of multiple straight segments, and the multiple straight segments are connected by curved segments. The multiple straight segments are arranged in parallel on the same plane, and the spacing between the straight segments gradually decreases from the water inlet end to the water outlet end, and the decreasing distance is unequal or equal.

3. The phase-change energy storage wall with variable tube spacing for radiant cooling according to claim 2 is characterized in that: The phase change material used in the radiation cooling phase change layer is a high thermal conductivity composite shape-fixed phase change material, the phase change temperature of the high thermal conductivity composite shape-fixed phase change material is 24-26° C., and the thickness of the radiation cooling phase change layer is 25-40 mm.

4. The phase-change energy storage wall with variable tube spacing for radiant cooling according to claim 3 is characterized in that: The outer decorative layer and the inner decorative layer are both fiber-reinforced plaster layers.

5. The phase-change energy storage wall with variable tube spacing for radiant cooling according to claim 4 is characterized in that: At least one section of the heat exchange tubes arranged with variable tube spacing is provided with exchange fins; The exchange fin includes a sleeve portion and an extension portion, the extension portion is integrally provided with the sleeve portion, and the extension portion is strip-shaped.

6. The phase-change energy storage wall with variable tube spacing for radiant cooling according to claim 5, characterized in that: The exchange fins are made of aluminum, and the sidewall of the sleeve portion is provided with openings connected to the upper and lower ends of the sleeve portion; The sleeve portion is sleeved on the heat exchange tube arranged with a variable tube pitch, and the sleeve portion is fastened to the outside of the heat exchange tube arranged with a variable tube pitch by a metal tie.

7. The phase-change energy storage wall with variable tube spacing for radiant cooling according to claim 6, characterized in that: The inner surface of the sleeve portion contacts the heat exchange tubes arranged with a variable tube pitch, and thermal conductive silicone grease is filled between the sleeve portion and the heat exchange tubes arranged with a variable tube pitch.

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