Wall having functions of noise elimination, phase change cold storage, and heat transfer enhancement

Abstract

The present invention relates to the technical field of heat exchange devices, and relates to a wall having functions of noise elimination, phase change cold storage, and heat transfer enhancement. Th

Description

A wall with sound attenuation, phase change cold storage and enhanced heat exchange functions

[0001] This disclosure claims priority to a Chinese patent application with an application date of June 8, 2022, application number CN202210640144.8, and titled “A wall with sound absorption, phase change cold storage and enhanced heat exchange functions.” Technical Field

[0002] The present invention belongs to the technical field of heat exchange equipment and relates to a wall with the functions of sound attenuation, phase change cold storage and enhanced heat exchange. Background Art

[0003] If ventilation or cooling is not implemented in nuclear power plant main control rooms and electrical equipment rooms after a power outage, the accumulated heat will cause the room temperature to gradually rise, potentially exceeding the temperature limits required for equipment operation and personnel accommodation. Currently, most nuclear power plants use active ventilation and cooling systems with emergency power supplies. These systems occupy large machine rooms and air ducts, resulting in high equipment procurement and maintenance costs. They also consume a significant amount of emergency power capacity after an accident, leaving room for improvement in reliability and cost-effectiveness.

[0004] In the civilian market, there is a cold storage wall technology that combines solid phase change materials and chilled water pipes. It can be installed in conjunction with concrete walls, does not occupy an additional air-conditioning room, and has a good passive cooling effect. However, its materials and structure do not meet the design requirements of nuclear power plant building decoration, fire prevention, waterproofing, radiation protection, etc.

[0005] The walls of the enclosing structure of the habitable area of ​​the main control room of a nuclear power plant are relatively thick and have excellent cold storage potential. However, in order to meet the noise limit of the main control room, the exterior facade of the wall decoration needs to be arranged with sound-absorbing panels with micro-perforations and sound-absorbing materials, which has a large thermal resistance and reduces the cold storage and release effects of the concrete structure.

[0006] Summary of the Invention

[0007] The purpose of the present invention is to provide a wall with the functions of sound elimination, phase change cold storage and enhanced heat exchange, so that it can be used in the main control room and electrical equipment room of a nuclear power plant to have the functions of sound elimination, phase change cold storage and enhanced heat exchange.

[0008] To achieve this object, the present invention provides a wall with the functions of sound absorption, phase change cold storage and enhanced heat exchange, wherein the wall includes a concrete layer, a phase change cold storage layer, a micro-perforated plate, an insulation layer and a heat-conducting cold bridge, wherein the insulation layer is arranged on the outermost side of the wall to limit the heat transfer from the cold storage boundary to the outside; the concrete layer is connected to the phase change cold storage layer and is located as a whole on the inner side of the insulation layer and the outer side of the micro-perforated plate; the concrete layer is used to bear the wall structure load and provide part of the cold storage capacity; the phase change cold storage layer is used to provide most of the cold storage capacity; the micro-perforated plate is arranged on the innermost side of the wall for radiation heat exchange, convection heat exchange and noise reduction; the heat-conducting cold bridge connects the micro-perforated plate, the phase change cold storage layer and the concrete layer, serving as both a structural support and a heat transfer component.

[0009] In a preferred embodiment, the present invention provides a wall with the functions of sound attenuation, phase change cold storage and enhanced heat exchange, wherein: the phase change cold storage layer includes a supporting material and a phase change cold storage material, the supporting material is a porous or fibrous solid, and the particles of the phase change cold storage material are mixed in the supporting material in a certain proportion so that the phase change cold storage material can maintain a solid state as a whole in any phase state; the phase change cold storage material can be made of organic material, inorganic material or eutectic salt to maintain a solid state at the room design temperature (20°C to 50°C). The material remains solid below the room temperature and turns into liquid when the room temperature exceeds the room design temperature, and the latent heat of fusion of the phase change cold storage material is not less than 200kJ / kg; the micro-perforated plate is made of a high thermal conductivity metal with a thermal conductivity greater than 100W / mK, and the surface is coated with a black body radiation coating; the material of the thermal insulation layer is a fireproof insulation material, the thermal conductivity of the thermal insulation layer is less than 0.05W / mK, the fire resistance temperature is greater than 1200℃ and the fire resistance time is greater than 2h to reduce the risk of fire (if the thermal insulation layer is used in a nuclear power plant, the material must also be resistant to radiation (dose greater than 4×10 4 Gy), aging resistance, steam resistance, no water absorption, no expansion, no mold).

[0010] In a preferred embodiment, the present invention provides a wall having the functions of sound absorption, phase change cold storage and enhanced heat exchange, wherein when the phase change cold storage material in the phase change cold storage layer is a combustible organic compound including paraffin, the phase change cold storage layer can be placed between the concrete layer and the insulation layer.

[0011] In a preferred embodiment, the present invention provides a wall having the functions of sound absorption, phase change cold storage and enhanced heat exchange, wherein the inner surface of the phase change cold storage layer is processed into a rough porous shape or a layer of sound absorption material is attached to it so as to have certain resistive sound absorption characteristics, thereby forming an impedance composite sound absorption function in conjunction with the micro-perforated plate.

[0012] In a preferred embodiment, the present invention provides a wall structure that combines sound attenuation, phase-change cold storage, and enhanced heat exchange. In this structure, an integral gravity heat pipe is used as the thermally conductive cold bridge to enhance the heat transfer capacity within the phase-change cold storage layer. The unidirectional heat transfer of the heat pipe enables different cold storage and release rates. If a room requires rapid cold storage and slow cold release, the gravity heat pipe evaporator section is positioned within the phase-change cold storage layer; if a room requires slow cold storage and rapid cold release, the gravity heat pipe evaporator section is positioned indoors.

[0013] In a preferred embodiment, the present invention provides a wall with the functions of sound absorption, phase change cold storage and enhanced heat exchange, wherein if the room design temperature is greater than or equal to the wall phase change temperature during normal operation, the wall also includes a chilled water coil (if the room design temperature is lower than the wall phase change temperature during normal operation, the chilled water coil is not required, and the phase change cold storage material is maintained in a solid state by heat conduction of the heat pipe), the chilled water coil passes through and is arranged inside or on the surface of the phase change cold storage layer, and is used to combine the chilled water coil and the phase change cold storage layer to provide most of the cold storage capacity; the chilled water coil is spiral, circuitous, spiral circuitous or capillary branch type (wherein the capillary branch type can improve the uniformity of cooling and reduce the pipeline design pressure and flooding risk).

[0014] In a preferred embodiment, the present invention provides a wall having the functions of sound absorption, phase change cold storage and enhanced heat exchange, wherein, depending on the position of the chilled water interface of the chilled water coil, the phase change cold storage layer can be located outside the concrete layer (close to the outdoors) or can be located inside the concrete layer (close to the indoors).

[0015] In a preferred embodiment, the present invention provides a wall having the functions of sound attenuation, phase change cold storage and enhanced heat exchange, wherein the wall further comprises a drainage trough and a drainage pipe arranged on the ground below the phase change cold storage layer, for collecting and discharging leaked water and condensed water from the pipeline, thereby avoiding the impact of flooding on interior decoration and equipment, and serving as a means of monitoring the integrity of the chilled water coil.

[0016] In a preferred embodiment, the present invention provides a wall having the functions of sound absorption, phase change cold storage and enhanced heat exchange, wherein the micro-perforated plate adopts a cold radiation plate structure and maintains a certain distance from the innermost side of the wall except the micro-perforated plate to form a ventilation cavity that runs through the top and bottom, and utilizes the temperature difference between the room / wall and the height difference between the upper and lower micro-perforations to form natural ventilation, while enhancing radiation and convection heat transfer.

[0017] In a preferred embodiment, the present invention provides a wall with the functions of sound elimination, phase change cold storage and enhanced heat exchange, wherein the wall further comprises a resistive sound elimination layer and a ventilation cavity arranged in the resistive sound elimination layer, the resistive sound elimination layer is arranged between the phase change cold storage layer and the micro-perforated plate, and is used to form a sound elimination and heat exchange layer together with the micro-perforated plate and the ventilation cavity, while meeting the requirements of resistive and resistant sound elimination; the material of the resistive sound elimination layer is flame retardant grade organic fiber or inorganic fiber (if the resistive sound elimination layer is used in a nuclear power plant, the radiation dose resistance must also meet 4×10 4 Gy).

[0018] The beneficial effect of the present invention is that the wall of the present invention with the functions of sound elimination, phase change cold storage and enhanced heat exchange can have the functions of sound elimination, phase change cold storage and enhanced heat exchange when used in the main control room and electrical equipment room of a nuclear power plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG1 is a schematic structural diagram of a wall having the functions of sound attenuation, phase change cold storage and enhanced heat exchange according to Example 1 of the present invention.

[0020] FIG2 is a schematic diagram of a phase change cold storage fire resistant wall structure in which chilled water does not enter a room according to Example 2 of the present invention.

[0021] FIG3 is a schematic diagram of a phase-change cold storage wall structure without chilled water pipes according to Example 3 of the present invention.

[0022] FIG4 is a schematic diagram of the structure of a phase change cold storage wall using capillary chilled water pipes according to Example 4 of the present invention. DETAILED DESCRIPTION

[0023] The structure of an exemplary wall of the present invention having the functions of sound absorption, phase change cold storage and enhanced heat exchange is shown in Figure 1, including a concrete layer 1, a phase change cold storage layer 2 (the supporting material is, for example, honeycomb activated carbon, and the phase change cold storage material is, for example, paraffin with a melting point of 28°C), a resistive sound absorption layer 4 (the material is, for example, 3 cm thick glass wool, wrapped with radiation-resistant glass fiber cloth), a micro-perforated plate 5 (for example, a 0.6 mm aluminum alloy plate, with a black body radiation coating on the surface), a ventilation cavity 7, an insulation layer 8 (the material is, for example, silicone rubber or glass wool, with a thickness of, for example, 50 mm to 80 mm, and a fire resistance time of, for example, 2 hours), a drainage trough 9, a drainage pipe 10 and a heat-conducting cold bridge (for example, the integral heat pipe 6 described below).

[0024] The thermal insulation layer 8 is arranged on the outermost side of the wall (outdoor side) to limit heat transfer from the cold storage boundary to the outside.

[0025] The concrete layer 1 is connected to the phase-change cold storage layer 2 and is located as a whole on the inner side of the thermal insulation layer 8 and the outer side of the micro-perforated plate 5. The concrete layer 1 is used to bear the load of the wall structure and provide part of the cold storage capacity. The phase-change cold storage layer 2 is used to provide the majority of the cold storage capacity. When the phase-change cold storage material is a combustible organic compound including paraffin, the phase-change cold storage layer 2 can be placed between the concrete layer 1 and the thermal insulation layer 8. The inner surface of the phase-change cold storage layer 2 is processed into a rough and porous shape or a layer of sound-absorbing material is attached to it to have certain resistive sound-absorbing properties, and cooperate with the micro-perforated plate 5 to form an impedance composite sound-absorbing function.

[0026] Microperforated panels 5 are placed on the innermost side of the wall, providing radiant and convective heat transfer and noise reduction. They utilize a cold radiant panel structure and are positioned at a distance from the innermost portion of the wall, forming a vertically connected ventilation cavity 7. This cavity utilizes the temperature difference between the room and the wall and the height difference between the upper and lower microperforations to create natural ventilation while enhancing both radiant and convective heat transfer.

[0027] The resistive sound-absorbing layer 4 is arranged between the phase-change cold storage layer 2 and the micro-perforated plate 5, and the ventilation cavity 7 is provided within the resistive sound-absorbing layer 4. The resistive sound-absorbing layer 4 is used to form a sound-absorbing and heat-exchange layer together with the micro-perforated plate 5 and the ventilation cavity 7, meeting both resistive and reactive sound-absorbing requirements.

[0028] A thermally conductive cold bridge connects the microperforated plate 5, the phase-change cold storage layer 2, and the concrete layer 1, serving as both a structural support and a heat transfer component. An integrated gravity heat pipe is used as the thermally conductive cold bridge to enhance heat transfer within the phase-change cold storage layer 2. The unidirectional heat transfer of the heat pipe enables variable cold storage and release rates. If the room requires rapid cold storage and slow release, the gravity heat pipe evaporator section is placed within the phase-change cold storage layer 2; if the room requires slow cold storage and rapid release, the gravity heat pipe evaporator section is located indoors.

[0029] If the room design temperature during normal operation is greater than or equal to the wall's phase-change temperature, the wall also includes a chilled water coil 3. (If the room design temperature during normal operation is lower than the wall's phase-change temperature, the chilled water coil 3 is not required, and the phase-change cool storage material is maintained in a solid state solely through heat conduction from the heat pipe.) The chilled water coil 3 passes through and is arranged within or on the surface of the phase-change cool storage layer 2. The chilled water coil 3 and the phase-change cool storage layer 2 combine to provide the majority of the cool storage capacity. The chilled water coil 3 can be spiral, circuitous, spiral-circular, or capillary-branched (the capillary-branched type improves cooling uniformity and reduces pipe design pressure and flooding risk). Depending on the location of the chilled water interface of the chilled water coil 3, the phase-change cool storage layer 2 can be located either outside the concrete layer 1 (closer to the outdoors) or inside the concrete layer 1 (closer to the indoors).

[0030] A drainage trough 9 and a drainage pipe 10 are set on the ground below the phase change cold storage layer 2 to collect and discharge pipeline leakage water and condensed water, thereby preventing flooding from affecting indoor decoration and equipment, and serving as a means to monitor the integrity of the chilled water coil 3.

[0031] The application examples of the wall with the above exemplary embodiments of the present invention having the functions of sound attenuation, phase change cold storage and enhanced heat exchange are as follows:

[0032] Example 1:

[0033] The concrete layer 1 is the primary load-bearing component of the wall and is responsible for a portion of the cold storage capacity. The phase-change cold storage layer 2 comprises supporting materials and phase-change cold storage material. The wall also includes chilled water coils 3 that pass through and are arranged within or on the surface of the phase-change cold storage layer 2, thus the phase-change cold storage layer 2 bears the majority of the cold storage capacity. The insulation layer 8 is used to reduce the leakage of stored cold to the outside, improve cold storage efficiency, and reduce cooling energy consumption.

[0034] The sound-absorbing and heat-exchange layer consists of a resistive sound-absorbing layer 4, a microperforated plate 5, and a ventilation cavity 7, meeting both resistive and reactive sound-absorbing requirements. The microperforated plate 5 is made of a highly thermally conductive metal and coated with a blackbody radiation coating, resulting in a high radiative heat transfer coefficient. Furthermore, the microperforated plate 5 utilizes the temperature and height differences between inside and outside to generate natural ventilation, circulating air through the ventilation cavity 7, ensuring a high convective heat transfer coefficient.

[0035] The concrete layer 1, the phase-change cold storage layer 2, and the micro-perforated plate 5 are connected by an integrated heat pipe 6, which forms a heat-conducting cold bridge. The integrated heat pipe 6, constructed of steel pipe or hollow square steel, offers high strength and rigidity and serves as a supporting rod for the phase-change cold storage layer 2 and the micro-perforated plate 5. The condenser section of the integrated heat pipe 6 is pre-buried in the concrete layer 1 via a sleeve, while the evaporator section is fixed to the micro-perforated plate 5 at an angle to facilitate gravity return of liquid within the heat pipe.

[0036] During normal operation, the chilled water coil 3 maintains the temperature of the phase-change thermal storage layer 2 slightly below the room temperature and can be used to remove some of the room's cooling load. In this case, the phase-change thermal storage material remains solid. Following a power outage, the chilled water system and the room's air conditioning system shut down, and the temperature difference between the wall and the room gradually increases, causing the phase-change thermal storage material to melt. Through the combined effects of heat conduction through the integrated heat pipe 6, radiation heat transfer through the micro-perforated plate 5, and convection heat transfer through the cavity 7, the cold stored in the concrete, the remaining chilled water, and the phase-change thermal storage material is transferred into the room, maintaining the room temperature below the set point for a certain period of time.

[0037] A drainage trough 9 and a drainage pipe 10 are provided at the bottom of the phase change cold storage layer 2 to collect and drain water leaking from the chilled water pipe and condensed water on the wall. At the same time, the drainage volume can be used to determine whether the chilled water coil 3 in the wall is leaking.

[0038] The chilled water coil 3 can be arranged in a circuitous or spiral manner in the phase change cold storage layer 2. It is recommended to adopt an upward delivery and downward return method to improve the heat exchange efficiency.

[0039] Example 2:

[0040] As shown in Figure 2, this embodiment provides a phase-change cold storage fire-resistant wall structure that prevents chilled water from entering the room. It is suitable for rooms with high requirements for waterproofing and fire protection. The wall is divided into five layers from the exterior to the interior: an insulation layer 8 (a fireproof insulation layer), a phase-change cold storage layer 2, a concrete layer 1, a resistive sound-absorbing layer 4, and a micro-perforated panel 5.

[0041] This differs from Example 1 in that the phase-change thermal storage layer 2 is positioned outside the concrete layer 1, ensuring that the interface of the chilled water coil 3 is accessible outside the room. An insulation layer 8 covers the exterior of the wall to prevent the phase-change thermal storage material from burning during a fire. Furthermore, an integral heat pipe 6 penetrates the concrete layer 1, ensuring heat conduction between the phase-change thermal storage layer 2 and the micro-perforated plate 5.

[0042] Example 3:

[0043] As shown in FIG3 , this embodiment provides a phase-change cold storage wall structure without a chilled water pipe, which is suitable for air-conditioned rooms with low normal operating temperatures and electrical instrument rooms with high waterproofing requirements.

[0044] The difference from Example 1 is that the chilled water coil 3 in the phase change cold storage layer 2 is eliminated, and the inclination angle of all or some of the integral heat pipes 6 is changed (Figure a in Figure 3). The evaporation section (lower end) of the integral heat pipe 6 (functioning as a cold storage heat pipe) is installed in the wall, and the condensation section (upper end) of the integral heat pipe 6 is connected to the micro-perforated plate 5, so that during normal operation, excess cold in the room can be efficiently transferred into the wall for storage. The integral heat pipe 6 has a certain directionality in heat transfer. When the upper end is located on the room side (inside), it can effectively utilize the low temperature during normal operation of the room and quickly transfer the room's cold energy to the wall through the phase change cycle, reducing the temperature difference between the room environment and the interior of the wall, ensuring the required cold storage capacity per unit volume of the wall, and thus replacing the cold storage function of the chilled water pipe. After a power outage, when the room temperature is higher than the wall temperature, although the phase change cycle in the integral heat pipe 6 cannot be established, the cold storage in the wall can still be slowly introduced into the room through the metal part of the outer shell of the integral heat pipe 6 (Figure a in Figure 3) to lower the room temperature; or some additional cold-releasing heat pipes 11 with an inclination angle opposite to the direction of the integral heat pipe 6 can be set (Figure b in Figure 3). Their structure is the same as that of the integral heat pipe, which is specifically used to quickly introduce the cold storage in the wall into the room when the room temperature is higher than the wall.

[0045] Example 4:

[0046] As shown in FIG4 , this embodiment provides a phase-change cold storage wall structure using capillary chilled water pipes, which is suitable for rooms with limited wall thickness.

[0047] This embodiment differs from Example 1 in that the circuitous chilled water coil 3 is replaced with a chilled water main 13 and capillary chilled water branches 12. These are arranged within or on the surface of the phase-change thermal storage layer 2. The chilled water main 13 connects to multiple capillary chilled water branches 12 and distributes chilled water to each capillary chilled water branch 12. The capillary chilled water branches have a larger filling ratio and specific surface area than conventional chilled water pipes, resulting in more uniform heat exchange with the phase-change thermal storage material. Furthermore, the chilled water is transported by capillary and gravity forces, resulting in lower pipe resistance, lower water supply pressure requirements, and reduced leakage risk.

[0048] During normal operation, the wall of the present invention stores cold energy in the concrete and phase-change cold storage material through the chilled water coils inside the wall. After a power failure, the cold energy stored in the concrete and phase-change cold storage material is transferred to the room through the heat pipes and heat exchange plates. At the same time, the heat exchange plates are specially designed to provide noise reduction functions.

[0049] The beneficial effects of the present invention are specifically embodied in:

[0050] 1) The present invention adopts a passive phase change cold storage wall in the heat dissipation room, which can eliminate the active cooling system after a power failure accident, improve the economy and passive reliability of the air-conditioning system, and further reduce room noise.

[0051] 2) The present invention arranges the phase change cold storage layer on the outside of the concrete wall and uses heat pipes to enhance heat conduction inside the wall. Chilled water does not need to enter the room to store and release cold, reducing the risk of electrical equipment failure caused by water pipe leakage.

[0052] 3) The present invention uses a nuclear power plant-specific fireproof insulation material that meets a certain fire resistance time as the outer wall insulation layer, thereby reducing the risk of fire in the phase change cold storage layer and reducing the leakage of cold storage to the outside.

[0053] 4) The present invention connects the concrete layer, phase change cold storage layer and silencer heat exchange plate through an integral heat pipe, which not only increases the strength of the wall structure, but also enhances the heat conductivity inside the wall, solving the problem of low cold storage capacity utilization of the nuclear power plant main control room enclosure structure.

[0054] 5) The present invention uses a micro-perforated plate made of high thermal conductivity metal as a heat exchange plate, adds a blackbody radiation coating on its surface, and reserves a natural convection cavity, which can effectively enhance the convection, radiation heat exchange and noise reduction effects of the micro-perforated plate.

[0055] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these changes and variations. The above embodiments or implementation methods are merely illustrative of the present invention, and the present invention may also be implemented in other specific ways or other specific forms without departing from the gist or essential features of the present invention. Therefore, the described implementation methods should be regarded as illustrative and not restrictive in any respect. The scope of the present invention should be described by the appended claims, and any changes that are equivalent to the intent and scope of the claims should also be included within the scope of the present invention.

Claims

1. A wall with the functions of sound attenuation, phase change cold storage and enhanced heat exchange, characterized by: The wall comprises a concrete layer (1), a phase-change cold storage layer (2), a micro-perforated plate (5), a thermal insulation layer (8) and a heat-conducting cold bridge. The thermal insulation layer (8) is arranged on the outermost side of the wall and is used to limit heat transfer from the cold storage boundary to the outside; The concrete layer (1) is connected to the phase-change cold storage layer (2) and is entirely located on the inner side of the thermal insulation layer (8) and the outer side of the micro-perforated plate (5); The concrete layer (1) is used to bear the wall structure load and provide part of the cold storage capacity; The phase-change cold storage layer (2) is used to provide most of the cold storage capacity; The micro-perforated plate (5) is arranged on the innermost side of the wall and is used for radiation heat exchange, convection heat exchange and noise reduction; The heat-conducting cold bridge connects the micro-perforated plate (5), the phase-change cold storage layer (2) and the concrete layer (1), and serves as both a structural support and a heat transfer component.

2. The wall according to claim 1, characterized in that: The phase-change cold storage layer (2) comprises a supporting material and a phase-change cold storage material, wherein the supporting material is a porous or fibrous solid, and particles of the phase-change cold storage material are mixed in the supporting material in a proportion so that the phase-change cold storage material maintains a solid state as a whole in any phase state of the phase-change cold storage material; The phase change cold storage material is made of organic material, inorganic material or eutectic salt, so as to remain in solid state below the room design temperature and transform into liquid state above the room design temperature, and the latent heat of fusion of the phase change cold storage material is not less than 200 kJ / kg; The micro-perforated plate (5) is made of a high thermal conductivity metal with a thermal conductivity greater than 100 W / mK, and the surface is coated with a black body radiation coating; and The material of the thermal insulation layer (8) is a fireproof heat-insulating material, the thermal conductivity of the thermal insulation layer is less than 0.05W / mK, the fire-resistant temperature is greater than 1200°C and the fire-resistant time is greater than 2h, so as to reduce the fire risk.

3. The wall according to claim 1, characterized in that: When the phase-change cold storage material in the phase-change cold storage layer (2) is a combustible organic compound including paraffin, the phase-change cold storage layer (2) is placed between the concrete layer (1) and the thermal insulation layer (8).

4. The wall according to claim 1, characterized in that: The inner surface of the phase-change cold storage layer (2) is processed into a rough porous shape or a layer of sound-absorbing material is attached to it, so as to have a resistive sound-absorbing characteristic, thereby forming an impedance composite sound-absorbing function in conjunction with the micro-perforated plate (5).

5. The wall according to claim 1, characterized in that: An integral gravity heat pipe is used as the heat-conducting cold bridge to improve the heat conduction capacity inside the phase-change cold storage layer (2).

6. The wall according to claim 1, characterized in that: If the room design temperature is greater than or equal to the wall phase change temperature during normal operation, the wall further comprises a chilled water coil (3), which passes through and is arranged inside or on the surface of the phase change cold storage layer (2), so that the chilled water coil and the phase change cold storage layer are combined to provide most of the cold storage capacity; the chilled water coil (3) is spiral, circuitous, spiral circuitous or capillary branching.

7. The wall according to claim 6, characterized in that: Depending on the position of the chilled water interface of the chilled water coil (3), the phase-change cold storage layer (2) is located outside the concrete layer (1) or inside the concrete layer (1).

8. The wall according to claim 6, characterized in that: The wall also includes a drainage trough (9) and a drainage pipe (10) arranged on the ground below the phase change cold storage layer (2) for collecting and draining pipeline leakage water and condensed water, thereby preventing flooding from affecting indoor decoration and equipment, and serving as a means of monitoring the integrity of the chilled water coil (3).

9. The wall according to claim 1, characterized in that: The micro-perforated plate (5) adopts a cold radiation plate structure and is kept at a distance from the innermost side of the wall except the micro-perforated plate to form a ventilation cavity that runs through from top to bottom, and utilizes the temperature difference between the room and the wall and the height difference between the upper and lower micro-perforations to form natural ventilation, while strengthening radiation and convection heat transfer.

10. The wall according to claim 1, characterized in that: The wall also includes a resistive sound-absorbing layer (4) and a ventilation cavity (7) arranged in the resistive sound-absorbing layer. The resistive sound-absorbing layer (4) is arranged between the phase-change cold storage layer (2) and the micro-perforated plate (5), and is used to form a sound-absorbing and heat-exchanging layer together with the micro-perforated plate (5) and the ventilation cavity (7), thereby meeting both resistive and reactive sound-absorbing requirements. The material of the resistive sound-absorbing layer (4) is flame-retardant grade organic fiber or inorganic fiber.

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