WO2023236456A1

WO2023236456A1 - Wall having functions of noise elimination, phase change cold storage, and heat transfer enhancement

Info

Publication number: WO2023236456A1
Application number: PCT/CN2022/134265
Authority: WO
Inventors: 胡北; 李百利; 刘婧; 韩金权; 张丽丽; 张凤霖; 邱珊珊; 康健; 朱芸芸; 陈浩南; 刘新
Original assignee: 中国核电工程有限公司
Priority date: 2022-06-08
Filing date: 2022-11-25
Publication date: 2023-12-14
Also published as: CN115030353A

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. The wall comprises a concrete layer (1), a phase change cold storage layer (2), a micro-perforated plate (5), a heat insulation layer (8), and a heat-conduction cold bridge. The wall having functions of noise elimination, phase change cold storage, and heat transfer enhancement of the present invention can implement the functions of noise elimination, phase change cold storage, and heat transfer enhancement when being applied to nuclear power station master control rooms and electrical instrument device rooms.

Description

A wall that combines the functions of sound attenuation, phase change cold storage and enhanced heat transfer

This disclosure requires the priority of a Chinese patent application with an application date of June 8, 2022, an application number of CN202210640144.8, and a name of “a wall with sound attenuation, phase change cold storage and enhanced heat transfer functions”.

Technical field

The invention belongs to the technical field of heat exchange equipment and relates to a wall that has the functions of noise elimination, phase change cold storage and enhanced heat exchange.

Background technique

After the AC power is lost in the main control room and electrical equipment room of the nuclear power plant, if there is no ventilation or cooling, the accumulation of heat dissipation will cause the temperature of the room to gradually rise, which may exceed the temperature limit required for equipment operation and personnel residence. At present, most nuclear power plants use active ventilation and cooling systems with emergency power supply. The machine room and air ducts occupy a large area, the equipment procurement and operation and maintenance costs are high, and a large amount of post-accident emergency power supply capacity is occupied. The reliability and economy need to be improved.

There is a cold storage wall technology in the civilian market 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 good passive cooling effects. However, its materials and structure are not suitable for nuclear power plant buildings. Design requirements for decoration, fire protection, waterproofing, radiation protection, etc.

The enclosure structure wall of the habitable area of the main control room of the nuclear power plant is thicker and has 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 equipped with sound-absorbing panels with micro-perforations and sound-absorbing materials. , the thermal resistance is large, which reduces the cold storage and cold release effects of the concrete structure.

Contents of the invention

The object of the present invention is to provide a wall that has the functions of sound attenuation, phase change cold storage and enhanced heat exchange, so that when used in the main control room and electrical equipment room of a nuclear power plant, it can have the functions of sound attenuation, phase change cold storage and enhanced heat exchange. Enhance heat exchange function.

To achieve this goal, the present invention provides a wall that has the functions of sound attenuation, phase change cold storage and enhanced heat exchange. The wall includes a concrete layer, a phase change cold storage layer, a micro-perforated plate, an insulation layer and a thermal conductive cold bridge. , the insulation layer is arranged on the outermost side of the wall to limit 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 entirely inside and outside the insulation layer. The outside of the micro-perforated plate; the concrete layer is used to bear the structural load of the wall 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 wall The innermost side is used for radiation heat exchange, convection heat exchange and noise reduction; the thermal conductive 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 transmission Hot parts.

In a preferred embodiment, the present invention provides a wall that has 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, and the 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 be used as a whole in any phase state. Maintain solid state; the phase change cold storage material can use organic materials, inorganic materials or eutectic salts to maintain the solid state below the room design temperature (20°C to 50°C), and transform into a liquid state when exceeding the room design temperature, and the 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 high thermal conductivity metal with a thermal conductivity greater than 100W/mK, and the surface is coated with a blackbody radiation coating; the material of the insulation layer is a fireproof and insulating material, so The thermal conductivity of the insulation layer is less than 0.05W/mK, the fire resistance temperature is greater than 1200°C and the fire resistance time is greater than 2h to reduce the risk of fire (if the 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).

In a preferred embodiment, the present invention provides a wall that has the functions of sound attenuation, phase change cold storage and enhanced heat transfer, wherein the phase change cold storage material in the phase change cold storage layer is a flammable material including paraffin. When using organic compounds, the phase change cold storage layer can be placed between the concrete layer and the insulation layer.

In a preferred embodiment, the present invention provides a wall that has the functions of sound attenuation, 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 is attached to it. The sound attenuating material has certain resistive sound attenuating properties, so as to cooperate with the micro-perforated plate to form an impedance composite sound attenuating function.

In a preferred embodiment, the present invention provides a wall that has the functions of sound attenuation, phase change cold storage and enhanced heat exchange, in which an integral gravity heat pipe is used as the thermal conductive cold bridge to improve the phase change The thermal conductivity inside the cold storage layer. Different cold storage and cold release rates can be achieved by utilizing the unidirectional heat transfer of heat pipes. If the room needs to store cold quickly and release it slowly, the evaporation section of the gravity heat pipe is set in the phase change cold storage layer; if the room needs to store heat slowly and release it quickly, the evaporation section of the gravity heat pipe is set inside the room.

In a preferred embodiment, the present invention provides a wall that has the functions of sound attenuation, phase change cold storage and enhanced heat exchange, wherein if the room design temperature is greater than or equal to the phase change temperature of the wall during normal operation, the wall The body also includes a chilled water coil (if the room design temperature is lower than the phase change temperature of the wall during normal operation, a chilled water coil is not needed, and the phase change cold storage material is maintained in a solid state only by thermal conduction of the heat pipe). The chilled water coil passes through through and arranged inside or on the surface of the phase change cold storage layer, 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 is spiral and circuitous Type, spiral roundabout type or capillary branch type (capillary branch type can improve the uniformity of cooling and reduce pipeline design pressure and risk of flooding).

In a preferred embodiment, the present invention provides a wall that has the functions of sound attenuation, phase change cold storage and enhanced heat exchange, wherein the phase change depends on the chilled water interface position of the chilled water coil. The cold storage layer may be located outside the concrete layer (close to the outdoors), or may be located inside the concrete layer (close to the indoors).

In a preferred embodiment, the present invention provides a wall that combines the functions of sound attenuation, phase change cold storage and enhanced heat exchange, wherein the wall further includes an exhaust pipe arranged on the ground below the phase change cold storage layer. Sink and drain pipe are used to collect and discharge pipeline leakage and condensation water, thereby avoiding the impact of flooding on indoor decoration and equipment, and as a means of monitoring the integrity of the chilled water coil.

In a preferred embodiment, the present invention provides a wall that has the functions of sound attenuation, phase change cold storage and enhanced heat exchange, in which the micro-perforated plate adopts a cold radiation plate structure and is combined with the wall to remove all elements of the wall. The innermost part of the part other than the micro-perforated plate is kept at a certain distance to form a ventilation cavity that runs up and down. The temperature difference between the room/wall and the height difference between the upper and lower micro-perforated panels are used to form natural ventilation, while enhancing radiation and convection heat transfer.

In a preferred embodiment, the present invention provides a wall that has the functions of sound attenuation, phase change cold storage and enhanced heat transfer, wherein the wall further includes a resistive sound attenuating layer and a resistive sound absorbing layer arranged on the resistive layer. A ventilation cavity in the sound attenuation layer, the resistive sound attenuation layer is arranged between the phase change cold storage layer and the micro-perforated plate, and is used to form an anechoic cavity together with the micro-perforated plate and the ventilation cavity. The acoustic heat exchange layer satisfies the requirements of resistance and resistance silencing at the same time; the material of the resistive silencing layer is flame-retardant organic fiber or inorganic fiber (if the resistive silencing layer is used in a nuclear power plant, it is resistant to radiation dose It also needs to meet 4×10 ⁴ Gy).

The beneficial effect of the present invention is that the wall with the functions of sound attenuation, phase change cold storage and enhanced heat exchange can be used in the main control room and electrical equipment room of a nuclear power plant. Enhance heat exchange function.

Description of the drawings

Figure 1 is a schematic structural diagram of a wall with functions of sound attenuation, phase change cold storage and enhanced heat exchange according to Embodiment 1 of the present invention.

Figure 2 is a schematic structural diagram of a phase change cold storage fire-resistant wall that prevents chilled water from entering the room according to Embodiment 2 of the present invention.

Figure 3 is a schematic structural diagram of a phase change thermal storage wall without chilled water pipes according to Embodiment 3 of the present invention.

Figure 4 is a schematic structural diagram of a phase change thermal storage wall using capillary chilled water pipes according to Embodiment 4 of the present invention.

Detailed ways

The structure of an exemplary wall of the present invention that has the functions of sound attenuation, phase change cold storage and enhanced heat exchange is shown in Figure 1, including a concrete layer 1 and a phase change cold storage layer 2 (the supporting material is, for example, honeycomb activated carbon, phase The variable cold storage material is, for example, paraffin with a melting point of 28°C), the resistive sound-absorbing layer 4 (made of, for example, glass wool with a thickness of 3 cm, and wrapped with radiation-resistant glass fiber cloth), and the micro-perforated plate 5 (for example, a 0.6 mm aluminum alloy plate with a surface Blackbody radiation coating), ventilation cavity 7, insulation layer 8 (material, for example, silicone rubber or glass wool, thickness, for example, 50 mm to 80 mm, fire resistance time, for example, 2 hours), drainage channel 9, drainage pipe 10, and heat conduction cooling Bridge (such as integrated heat pipe 6 as described below).

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.

The concrete layer 1 is connected to the phase change cold storage layer 2 and is located entirely inside the insulation layer 8 and outside the micro-perforated plate 5 . Concrete layer 1 is used to bear the structural load of the wall and provide part of the cold storage capacity. Phase change thermal storage layer 2 is used to provide most of the thermal storage capacity. When the phase change cold storage material is a flammable organic compound including paraffin, the phase change cold storage layer 2 can be placed between the concrete layer 1 and the insulation layer 8. The inner surface of the phase change cold storage layer 2 is processed into a rough porous shape or attached with a layer of sound attenuation material to have certain resistive sound attenuation characteristics, and cooperates with the micro-perforated plate 5 to form an impedance composite sound attenuation function.

Micro-perforated panels 5 are arranged on the innermost side of the wall for radiation heat transfer, convection heat transfer and noise reduction. The micro-perforated panel 5 adopts a cold radiation panel structure and is kept at a certain distance from the innermost part of the wall except the micro-perforated panel 5 to form a ventilation cavity 7 that runs up and down, taking advantage of the room/wall temperature difference and the upper and lower micro-perforated The height difference creates natural ventilation while enhancing radiation and convection heat transfer.

The resistive sound attenuation 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 attenuation layer 4 . The resistive sound attenuation layer 4 is used to form a sound attenuation and heat exchange layer together with the micro-perforated plate 5 and the ventilation cavity 7 to meet the requirements of resistance and resistance sound attenuation at the same time.

The thermal conductive cold bridge connects the micro-perforated 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 integral gravity heat pipe is used as a thermal conductive cold bridge to improve the thermal conductivity inside the phase change cold storage layer 2 . Different cold storage and cold release rates can be achieved by utilizing the unidirectional heat transfer of heat pipes. If the room needs to store cold quickly and release it slowly, the evaporation section of the gravity heat pipe is set in the phase change cold storage layer 2; if the room needs to store heat slowly and release it quickly, the evaporation section of the gravity heat pipe is set inside the room.

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 3 (if the room design temperature is lower than the wall phase change temperature during normal operation, the chilled water coil 3 is not needed and only The heat pipe conducts heat to maintain the phase change cold storage material in a solid state), the chilled water coil 3 passes through and is arranged inside or on the surface of the phase change cold storage layer 2, for the combination of the chilled water coil 3 and the phase change cold storage layer 2 to provide Most of the cold storage capacity; the chilled water coil 3 can be spiral, circuitous, spiral circuitous or capillary branch type (the capillary branch type can improve the uniformity of cooling and reduce the pipeline design pressure and risk of flooding). Depending on the location of the chilled water interface of the chilled water coil 3, the phase change cold storage layer 2 can be located outside the concrete layer 1 (close to the outdoors) or inside the concrete layer 1 (close to the indoors).

Drainage grooves 9 and drainage pipes 10 are provided on the ground below the phase change cold storage layer 2 to collect and discharge pipeline leakage water and condensation water, thereby avoiding the impact of flooding on indoor decoration and equipment, and at the same time serving as monitoring chilled water coils 3 means of integrity.

The application examples of the above-mentioned exemplary wall body of the present invention that combines the functions of sound attenuation, phase change cold storage and enhanced heat exchange are as follows:

Example 1:

Concrete layer 1 is the main stress-bearing component of the wall and bears part of the cold storage capacity. The phase change cold storage layer 2 includes support materials and phase change cold storage materials. The wall also includes chilled water coils 3 that pass through and are arranged inside or on the surface of the phase change cold storage layer 2, so that the phase change cold storage layer 2 bears most of the cold storage capacity. . The insulation layer 8 is used to reduce the leakage of cold storage capacity to the outside world, improve the cold storage efficiency, and reduce refrigeration energy consumption.

The sound attenuation heat exchange layer is composed of a resistive sound attenuation layer 4, a micro-perforated plate 5 and a ventilation cavity 7, which can meet the requirements of resistive and resistant sound attenuation at the same time. The micro-perforated plate 5 is made of high thermal conductivity metal, with a black body radiation coating on the surface, and has a high radiation heat transfer coefficient. At the same time, the micro-perforated plate 5 can form natural ventilation power by utilizing the temperature difference and height difference between the inside and outside, and circulates the inside and outside air through the ventilation cavity 7 to ensure a high convection heat transfer coefficient.

The concrete layer 1, the phase change cold storage layer 2 and the micro-perforated plate 5 are connected through an integral heat pipe 6, and the integral heat pipe 6 forms a thermal conductive cold bridge. The integrated heat pipe 6 adopts a steel pipe or hollow square steel structure, has high strength and rigidity, and can be used as a support rod for the phase change cold storage layer 2 and the micro-perforated plate 5. The condensation section of the integrated heat pipe 6 is pre-embedded in the concrete layer 1 through the casing, and the evaporation section of the integrated heat pipe 6 is fixed on the micro-perforated plate 5 and maintained at a certain angle to facilitate gravity return of liquid inside the heat pipe.

During normal operation, the temperature of the phase change thermal storage layer 2 is maintained slightly lower than the room temperature through the chilled water coil 3, and can be used to remove part of the room cooling load. In this case, the phase change thermal storage material remains solid. After the power outage accident, the chilled water system and the room air conditioning system were shut down, and the temperature difference between the wall and the room gradually increased, causing the phase change thermal storage material to melt. Under the joint action of convection heat transfer, the cold storage capacity of concrete, retained chilled water and phase change cold storage materials is introduced into the room to maintain the room temperature below the set value for a certain period of time.

A drainage groove 9 and a drainage pipe 10 are provided at the bottom of the phase change cold storage layer 2 to collect and remove leakage water from chilled water pipes and condensation water on the wall. At the same time, it can be determined whether the chilled water coil 3 in the wall is leaking based on the drainage volume.

The chilled water coil 3 can be arranged in a circuitous or spiral type in the phase change cold storage layer 2. It is recommended to use the upper and lower return method to improve the heat exchange efficiency.

Example 2:

As shown in Figure 2, this embodiment provides a phase change cold storage fire-resistant wall structure in which chilled water does not enter the room, and is suitable for rooms with high waterproof and fireproof requirements. The wall is divided into five layers from the outdoor to the indoor side, including insulation layer 8 (fireproof and thermal insulation layer), phase change cold storage layer 2, concrete layer 1, resistive anechoic layer 4 and micro-perforated plate 5.

The difference from Embodiment 1 is that the phase change cold storage layer 2 is arranged outside the concrete layer 1 to ensure that the interface of the chilled water coil 3 is operated outside the room. The outside of the wall is covered with an insulation layer 8 to ensure that the phase change cold storage material will not burn during the duration of the fire; and the integral heat pipe 6 penetrates the concrete layer 1 to ensure that the phase change cold storage layer 2 and the micro-perforated plate 5 are Heat Conduction.

Example 3:

As shown in Figure 3, this embodiment provides a phase change cold storage wall structure without chilled water pipes, which is suitable for air-conditioned rooms with low normal operating temperatures and electrical equipment rooms with high waterproof requirements.

The difference from Embodiment 1 is that the chilled water coil 3 in the phase change cold storage layer 2 is eliminated, and the inclination angle of all the integrated heat pipes 6 is changed (diagram a in Figure 3) or some of the integrated heat pipes 6 are changed. The inclination angle (diagram b in Figure 3). The evaporation section (lower end) of the integrated heat pipe 6 (functioning as a cold storage heat pipe) is installed in the wall, and the condensation section (upper end) of the integrated heat pipe 6 is connected to the micro-perforated plate 5 so that excess cooling in the room can be efficiently introduced during normal operation. stored in the wall. There is a certain directionality in the heat transfer of the integrated heat pipe 6. 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 cold heat to the wall through phase change circulation, reducing the room environment and wall The temperature difference inside the wall ensures the required cold storage capacity per unit volume of the wall to replace the cold storage function of the chilled water pipe. After a power outage accident, 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 wall cold storage can still be slowly introduced into the room through the metal part of the integral heat pipe 6 shell (Fig. Diagram a) in Figure 3 to reduce the room temperature; or some additional cooling heat pipes 11 (diagram b in Figure 3) with inclination angles opposite to those of the integrated heat pipes 6 can be provided. Their structures are also integrated heat pipes, specifically It is used to quickly introduce the cold storage capacity of the wall into the room when the room temperature is higher than that of the wall.

Example 4:

As shown in Figure 4, this embodiment provides a phase change cold storage wall structure using capillary chilled water pipes, which is suitable for rooms with limited wall thickness.

The difference from Embodiment 1 is that the chilled water main pipe 13 and the capillary chilled water branch pipe 12 are used instead of the circuitous chilled water coil 3 . The chilled water main pipe 13 and the capillary chilled water branch pipes 12 are arranged inside or on the surface of the phase change cold storage layer 2 . The chilled water main pipe 13 is connected to a plurality of capillary chilled water branch pipes 12 and distributes chilled water to each capillary chilled water branch pipe 12 . The filling ratio and specific surface area of the capillary chilled water branch pipes are larger than ordinary chilled water pipes, and the heat exchange with the phase change cold storage material is more uniform; and the capillary and gravity are used to transport chilled water, with smaller pipeline resistance, lower water supply pressure requirements, and at the same time reducing Risk of leakage.

During normal operation of the wall of the present invention, cold energy is stored in the concrete and phase change cold storage materials through the chilled water coils in the wall. After a power loss accident, the cold storage energy in the concrete and phase change cold storage materials is transmitted through the heat pipes and heat exchange plates. to the room, and at the same time, through a special structural design of the heat exchange plate, it has the function of noise reduction.

The beneficial effects of the present invention are specifically reflected in:

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

2) The present invention arranges the phase change cold storage layer outside the concrete wall and uses heat pipes to enhance heat conduction within the wall. Chilled water can store and release cold water in the room without entering the room, thereby reducing the risk of electrical equipment failure caused by water pipe leakage.

3) The present invention uses special fireproof insulation materials for nuclear power plants that meet a certain fire resistance time as the outer insulation layer of the wall, which not only reduces the risk of fire in the phase change cold storage layer, but also reduces the leakage of cold storage to the outside world.

4) The present invention connects the concrete layer, the phase change cold storage layer and the sound-absorbing heat exchange plate through the integral heat pipe, which not only increases the structural strength of the wall, but also enhances the heat conduction inside the wall and solves the problem of enclosing the main control room of the nuclear power plant. The problem of low utilization rate of structural cold storage.

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 heat exchange of the micro-perforated plate. Noise reduction effect.

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 invention. In this way, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies, the present invention is also intended to include these modifications and variations. The above-mentioned examples or implementations are only examples of the present invention, and the present invention can also be implemented in other specific ways or other specific forms without departing from the gist or essential characteristics of the present invention. Accordingly, the described embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention should be illustrated 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

A wall with functions of sound attenuation, phase change cold storage and enhanced heat exchange, characterized in that: the wall includes a concrete layer (1), a phase change cold storage layer (2), a micro-perforated plate (5), and thermal insulation layer (8) and thermally conductive cold bridge,

The insulation layer (8) is arranged on the outermost side of the wall to limit heat transfer from the cold storage boundary to the outside world;

The concrete layer (1) is connected to the phase change cold storage layer (2), and is located entirely inside the insulation layer (8) and outside the micro-perforated plate (5);

The concrete layer (1) is used to bear the structural load of the wall 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 for radiation heat transfer, convection heat transfer and noise reduction;

The thermally conductive cold bridge connects the micro-perforated 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.
The wall according to claim 1, characterized in that:

The phase change cold storage layer (2) includes a support material and a phase change cold storage material. The support material is a porous or fibrous solid. The particles of the phase change cold storage material are mixed in the support material in proportion, so that the In any phase state of the phase change thermal storage material, the entire phase change thermal storage layer (2) remains solid;

The phase change cold storage material adopts organic materials, inorganic materials or eutectic salts to maintain a solid state below the room design temperature and convert into a liquid state when exceeding 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 (5) is made of high thermal conductivity metal with a thermal conductivity greater than 100W/m.K, and the surface is coated with a blackbody radiation coating; and

The insulation layer (8) is made of fireproof and insulating material. The thermal conductivity of the insulation layer is less than 0.05W/m.K, the fire resistance temperature is greater than 1200°C, and the fire resistance time is greater than 2 hours to reduce the risk of fire.
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 flammable organic compound including paraffin, the phase change cold storage layer (2) is placed between the concrete layer (1) and the insulation layer (8).
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 attenuation material is attached to have resistive sound attenuation properties, so as to match the required The micro-perforated plate (5) forms an impedance composite silencing function.
The wall according to claim 1, characterized in that an integral gravity heat pipe is used as the thermal conductive cold bridge to improve the thermal conductivity inside the phase change cold storage layer (2).
The wall according to claim 1, characterized in that: if the room design temperature is greater than or equal to the phase change temperature of the wall during normal operation, the wall further includes a chilled water coil (3), and the chilled water coil passes through through and arranged inside or on the surface of the phase change cold storage layer (2), for the chilled water coil and the phase change cold storage layer to be combined to provide most of the cold storage capacity; the chilled water coil ( 3) It is spiral, circuitous, spiral circuitous or capillary branch type.
The wall according to claim 6, characterized in that: depending on the chilled water interface position of the chilled water coil (3), the phase change cold storage layer (2) is located outside the concrete layer (1), Or located inside the concrete layer (1).
The wall according to claim 6, characterized in that: the wall further includes a drainage channel (9) and a drainage pipe (10) provided on the ground below the phase change cold storage layer (2) for Collect and discharge pipeline leakage water and condensed water, thereby avoiding the impact of flooding on indoor decoration and equipment, and at the same time serving as a means to monitor the integrity of the chilled water coil (3).
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 part of the wall except for the micro-perforated plate. In order to form a ventilation cavity that runs up and down, the room/wall temperature difference and the height difference of the upper and lower micro-perforations are used to form natural ventilation, while enhancing radiation and convection heat transfer.
The wall according to claim 1, characterized in that: the wall further includes a resistive sound-absorbing layer (4) and a ventilation cavity (7) arranged in the resistive sound-absorbing layer,

The resistive sound attenuation layer (4) is arranged between the phase change cold storage layer (2) and the micro-perforated plate (5), for communicating with the micro-perforated plate (5) and the ventilation cavity. (7) Together they form a sound-absorbing heat exchange layer that simultaneously meets the requirements for resistive and resistant sound attenuation;

The material of the resistive sound-absorbing layer (4) is flame-retardant organic fiber or inorganic fiber.