An aerogel-modified honeycomb polyurethane insulation module

Abstract

This invention provides an aerogel-modified honeycomb polyurethane insulation module, comprising: a polyurethane foam core, an insulation rod, and an insulating housing. The insulation rod is disposed inside the polyurethane foam core and includes an outer shell surrounded by a structurally protective film, the outer shell being filled with aerogel. The polyurethane foam core has a honeycomb structure, including the perimeter of the polyurethane foam core and multiple walls extending longitudinally. Multiple adjacent honeycomb holes are arranged in a transversely extending planar array on the multiple walls. The polyurethane foam core surrounds the sides of the insulation rod. The insulating housing surrounds the outer surface of the polyurethane foam core, with the top and bottom surfaces of the insulating housing completely covering the polyurethane foam core and the insulating housing surrounding the sides of the polyurethane foam core. This invention addresses the higher insulation requirements of insulation modules in current LNG containment systems and leverages the material properties of polyurethane and silica aerogels to reduce heat loss during the storage and transportation of liquefied natural gas.

Description

Technical Field

[0001] This invention belongs to the field of LNG ship construction technology, and specifically relates to an aerogel-modified honeycomb polyurethane insulation module. Background Technology

[0002] The insulation module in an LNG containment system is a crucial component in LNG storage and transportation. It must possess excellent insulation performance to reduce the evaporation rate of liquefied natural gas, and polyurethane is typically used as the insulation material. Polyurethane has good insulation properties; the thermal conductivity of polyurethane foam boards ranges from 0.024 W / (m·K) to 0.032 W / (m·K), and it is also lightweight, non-corrosive, and has good mechanical properties.

[0003] Because LNG containment systems require higher insulation performance, it is urgent to improve polyurethane foam boards to minimize their thermal conductivity, thereby reducing the evaporation rate of liquefied natural gas and decreasing the weight of LNG carriers, while meeting the low-temperature insulation requirements of LNG carrier containment systems. Silica aerogel is a structurally controllable nanoporous lightweight material with excellent properties such as low density, low thermal conductivity, and high flame retardancy. Its thermal conductivity at room temperature and pressure can be as low as 0.013 W / (m·K), making it one of the materials with the lowest thermal conductivity currently available in the insulation field. However, its poor mechanical properties greatly limit its development and application areas.

[0004] Therefore, how to provide an aerogel-modified honeycomb polyurethane insulation module that can meet the higher insulation requirements of current LNG containment system insulation modules and reduce heat loss of liquefied natural gas during storage and transportation, based on the material properties of polyurethane and silica aerogel, has become an urgent technical problem to be solved. Summary of the Invention

[0005] This invention provides an aerogel-modified honeycomb polyurethane insulation module, which can reduce heat loss of liquefied natural gas during storage and transportation by addressing the higher insulation requirements of insulation modules in current LNG containment systems and the material properties of polyurethane and silica aerogels.

[0006] In this embodiment of the invention, an aerogel-modified honeycomb polyurethane insulation module is provided, comprising: a polyurethane foam core, an insulation rod, and an insulating box.

[0007] The insulation rod is disposed inside the polyurethane foam core and includes an outer shell surrounded by a film for structural protection, the outer shell being filled with aerogel.

[0008] The polyurethane foam core has a honeycomb structure, including the four edges of the polyurethane foam core and multiple walls extending along the longitudinal direction; the multiple walls have multiple adjacent honeycomb holes arranged in a transversely extending planar array.

[0009] The polyurethane foam core surrounds the side of the insulation rod; the insulating box surrounds the outer surface of the polyurethane foam core, and the insulating box on the top and bottom surfaces of the polyurethane foam core completely covers the polyurethane foam core and the insulating box around the sides of the polyurethane foam core.

[0010] Furthermore, the shape of the insulation rod is a cylinder or frustum consisting of at least a hexagonal prism, a cylinder or a frustum, or a column or frustum whose generatrix is ​​a curve of the hexagonal prism, cylinder or frustum.

[0011] Furthermore, both the polyurethane foam core and the aerogel are made of materials that meet the set thermal conductivity requirements. Specifically, the polyurethane foam core meets the set thermal conductivity requirements in the range of 0.024 W / (m·K) to 0.032 W / (m·K), and the aerogel meets the set thermal conductivity requirements in the range of 0.013 W / (m·K) to 0.024 W / (m·K).

[0012] Furthermore, the porosity of the polyurethane foam core is 33% to 70%.

[0013]

[0014] Where, δ aerogel =δ PU =δ is the thickness of the honeycomb polyurethane insulation module, S is the panel area of ​​the polyurethane foam core, S = a × b, where a and b are the length and width of the polyurethane foam core in the transverse extension plane, respectively; A aerogel The area of ​​all the insulation rods on the transversely extending plane 20. D is the inner diameter of the hexagonal insulation rod, and n is the number of insulation rods in the polyurethane foam core.

[0015] Furthermore, the total thermal resistance of the honeycomb polyurethane insulation module is:

[0016]

[0017] In the formula, R total R represents the total thermal resistance of the honeycomb polyurethane insulation module. PU The thermal resistance of the urethane foam core; R aerogel R is the thermal resistance of the insulating rod. ply An insulating enclosure for the top and bottom surfaces of a urethane foam core; R ply，around It is an insulating box around the sides of a polyurethane foam core.

[0018] Furthermore, the insulating housing is made of plywood with a thermal conductivity of 0.24 W / (m·K) and a thickness d2 ranging from 6 mm to 12 mm. Its thermal resistance is negligible.

[0019]

[0020] In the formula, R PU The thermal resistance of the polyurethane foam core; δ PU R represents the thickness of the polyurethane foam core. aerogel The thermal resistance of the insulating rod; δ aerogel γ is the thickness of the insulation rod; γ is the porosity of the honeycomb polyurethane insulation module; S is the panel area of ​​the polyurethane foam core; λ aerogel Let λ be the thermal conductivity of the insulating rod. PU is the thermal conductivity of the polyurethane foam core.

[0021] Furthermore, the thermal conductivity of the aerogel-modified honeycomb polyurethane insulation module is [value missing].

[0022]

[0023] In the formula, δ is the thickness of the honeycomb polyurethane insulation module; S is the panel area of ​​the polyurethane foam core; R total The total thermal resistance of the honeycomb polyurethane insulation module;

[0024] The heat flux density of the aerogel-modified honeycomb polyurethane insulation module is

[0025]

[0026] In the formula, Φ is the heat flow rate of the honeycomb polyurethane insulation module; ΔT is the temperature difference between the cold and hot ends of the honeycomb polyurethane insulation module; R total The total thermal resistance of the honeycomb polyurethane insulation module is given.

[0027] The density of the aerogel-modified honeycomb polyurethane insulation module is

[0028] ρ=ρ aerogel γ+ρ PU (1-γ)

[0029] In the formula, ρ is the density of the honeycomb polyurethane insulation module; ρ aerogel and ρ PU These are the densities of the aerogel and polyurethane foam core, respectively.

[0030] Furthermore, the polyurethane foam core is made of a low-temperature resistant material with a set strength, wherein the low-temperature resistant material can withstand a temperature of at least -163°C; the strength must meet the following requirements: shear strength in both the longitudinal and transverse directions must be ≥0.8 MPa at -100°C and at room temperature; tensile strength in the longitudinal direction must be ≥1.2 MPa, tensile strength in the transverse direction must be ≥2.7 MPa; and compressive strength in the longitudinal direction must be ≥1.2 MPa.

[0031] Furthermore, the outer shell of the insulation rod is an aluminum foil composite film selected from fiberglass cloth / aluminum foil material. The aluminum foil composite film has a sandwich structure with three layers and a total thickness of no more than 0.6 mm. The top and bottom layers are fiberglass cloth, and the middle layer is aluminum foil. The aerogel inside the outer shell is selected from silica aerogel material.

[0032] Furthermore, the silica aerogel material is fiber or porous ceramic, the fiber including glass fiber, silica fiber and alumina fiber, etc.; the porous ceramic includes silica, zirconium oxide and zirconium oxide porous ceramic doped with yttrium oxide; the aerogel fills the outer shell, and the outer shell is vacuum sealed to improve the heat insulation effect; the outer shell surface of the insulation rod and the wall surface of the honeycomb pores are coated with adhesive, the adhesive being epoxy resin.

[0033] Furthermore, the material of the box is plywood with a thickness ranging from 6mm to 12mm. The thickness of the perimeter of the polyurethane foam core is d1, which ranges from 3mm to 30mm. The horizontally extending plane is perpendicular to the longitudinal direction. Multiple walls of the honeycomb holes are connected to each other to form a closed surface. The included angle between any two walls is α, which ranges from 37° to 143°. The longitudinal direction is the heat conduction direction of the insulation module.

[0034] Furthermore, the thickness and spacing of the multiple walls of the honeycomb cells in the longitudinal direction are δ and T, respectively, where δ is 100mm to 450mm and T is 3mm to 30mm. The thickness of the polyurethane foam core, the insulation rod, and the honeycomb cells are equal. The length and width of the polyurethane foam core in the transverse extension plane are a and b, respectively, where a and b are 500mm to 4000mm. The inner diameter of the insulation rod in the transverse extension plane is D, where D is 45mm to 105mm.

[0035] The beneficial effects of this invention are as follows:

[0036] As can be seen from the above scheme, the embodiments of the present invention provide an aerogel-modified honeycomb polyurethane insulation module, comprising: a polyurethane foam core, an insulation rod, and an insulating box. The insulation rod is disposed inside the polyurethane foam core and includes an outer shell surrounded by a protective film, the outer shell being filled with aerogel; the polyurethane foam core has a honeycomb structure, including the perimeter of the polyurethane foam core and multiple walls extending longitudinally; multiple adjacent honeycomb holes are arranged in a transversely extending planar array along the multiple walls; the polyurethane foam core surrounds the sides of the insulation rod; the insulating box surrounds the outer surface of the polyurethane foam core, with the insulating boxes on the top and bottom surfaces of the polyurethane foam core completely covering the polyurethane foam core and the insulating boxes surrounding the sides of the polyurethane foam core. The technical solution of the present invention can reduce heat loss during the storage and transportation of liquefied natural gas by addressing the higher insulation requirements of insulation modules in current LNG containment systems and the material properties of polyurethane and silica aerogels. Attached Figure Description

[0037] Figure 1 This diagram illustrates an aerogel-modified honeycomb polyurethane insulation module in an enclosure system according to an embodiment of the present invention.

[0038] Figure 2 This is a schematic diagram of the internal structure of the aerogel-modified honeycomb polyurethane insulation module according to an embodiment of the present invention.

[0039] Figure 3 This is a top view of the insulation module described in an embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram of the steady-state heat transfer model of the adiabatic module according to an embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram of the series and parallel thermal resistance of the insulation module according to an embodiment of the present invention;

[0042] Figure 6 This is a graph showing the relationship between the thermal conductivity and density of the insulation module and the porosity of the insulation module described in this embodiment of the invention.

[0043] In the figure, 1 is a honeycomb polyurethane insulation module, 2 is a polyurethane foam core, 2a is the perimeter of the urethane foam core, 3 is an insulation rod, 4 is an insulation box, 5 is the outer shell surface, 6 is the wall surface, 7 is a honeycomb hole, 20 is a transverse extension plane, 21 is the longitudinal direction, and 22 is the transverse direction. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0045] In this embodiment of the invention, an aerogel-modified honeycomb polyurethane insulation module is provided. Addressing the higher insulation requirements of current LNG containment systems and considering the material properties of polyurethane and silica aerogels, this invention offers an aerogel-modified honeycomb polyurethane insulation module. The aim is to reduce heat loss during the storage and transportation of liquefied natural gas under a large temperature difference of -163°C and 20°C between the ambient temperature and the actual temperature.

[0046] like Figures 1 to 6 As shown, Figure 1 This diagram illustrates an aerogel-modified honeycomb polyurethane insulation module in an enclosure system according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the internal structure of the aerogel-modified honeycomb polyurethane insulation module according to an embodiment of the present invention. Figure 3 This is a top view of the insulation module described in an embodiment of the present invention. Figure 4 This is a schematic diagram of the steady-state heat transfer model of the adiabatic module according to an embodiment of the present invention. Figure 5 This is a schematic diagram of the series and parallel thermal resistance of the insulation module according to an embodiment of the present invention. Figure 6 This is a graph showing the relationship between the thermal conductivity, density, and porosity of the insulation module described in an embodiment of the present invention.

[0047] The figure shows an aerogel-modified honeycomb polyurethane insulation module 1, which includes a polyurethane foam core 2, an insulation rod 3, and an insulating box 4. The insulation rod 3 is disposed inside the polyurethane foam core 2, and the polyurethane foam core 2 surrounds the sides of the insulation rod 3. The number of insulation rods 3 in the polyurethane foam core 2 is n. The insulation rod 3 includes an outer shell surrounded by a thermally conductive protective film, and the outer shell is filled with aerogel. The insulating box 4 surrounds the outer surface of the foam core 2.

[0048] The polyurethane foam core 2 has a honeycomb structure, including the four edges of the polyurethane foam core and multiple walls extending along the longitudinal direction; the multiple walls have multiple adjacent honeycomb holes arranged in a transversely extending planar array.

[0049] The polyurethane foam core 2 surrounds the side of the insulation rod 3; the insulation box 4 surrounds the outer surface of the polyurethane foam core 2, and the insulation box 4 on the top and bottom surfaces of the polyurethane foam core 1 completely covers the polyurethane foam core 1 and the insulation box 4 around the sides of the polyurethane foam core 1.

[0050] In this embodiment of the invention, considering the composition, materials, geometry, and size characteristics of the insulation module for an LNG containment system, a honeycomb polyurethane insulation module modified with aerogel is provided. Compared with a polyurethane insulation module of the same size, this module reduces the overall thermal conductivity, thereby reducing the evaporation rate of liquefied natural gas and decreasing the weight of the LNG carrier, thus meeting the low-temperature insulation performance requirements of the LNG carrier's containment system. The technical solution of this invention utilizes the low thermal conductivity and low density of aerogel, and through doping with materials with high tensile strength and high compressive strength, prepares a composite material that balances thermal insulation and mechanical properties. The composite aerogel is prepared into a honeycomb structure, and after wrapping the outer surface with a layer of aluminum foil composite film for structural protection, it is made into an insulation rod and filled into a polyurethane foam core.

[0051] The honeycomb hexagonal ribs serve as supports between the insulation rods, leveraging the high strength of the honeycomb structure to significantly improve the mechanical properties of the insulation module, representing a technological advantage over other insulation modules. The thermal conductivity of the insulation module is obtained using a dedicated formula, resulting in a significant improvement in insulation performance compared to existing LNG containment systems. Simultaneously, it reduces the weight of the LNG containment system, enhancing the competitiveness of domestically produced LNG carriers in the international market.

[0052] In one embodiment of the present invention, the shape of the insulation rod 3 is a cylinder or frustum comprising at least a hexagonal prism, a cylinder or a frustum, with the generatrix of the hexagonal prism, cylinder or frustum as a curve.

[0053] In another embodiment of the present invention, both the polyurethane foam core 2 and the aerogel are made of materials that meet the set thermal conductivity requirements, wherein the polyurethane foam core meets the set thermal conductivity requirements in the range of 0.024 W / (m·K) to 0.032 W / (m·K); and the aerogel meets the set thermal conductivity requirements in the range of 0.013 W / (m·K) to 0.024 W / (m·K).

[0054] In another embodiment of the present invention, the porosity of the polyurethane foam core is 33% to 70%.

[0055]

[0056] Where, δ aerogel =δ PU =δ is the thickness of the honeycomb polyurethane insulation module, S is the panel area of ​​the polyurethane foam core, S = a × b, where a and b are the length and width of the polyurethane foam core in the transverse extension plane, respectively; A aerogel The area of ​​all the insulation rods on the transversely extending plane 20. D is the inner diameter of the hexagonal insulation rod, and n is the number of insulation rods in the polyurethane foam core.

[0057] In another embodiment of the present invention, the total thermal resistance of the honeycomb polyurethane insulation module is:

[0058]

[0059] In the formula, R total R represents the total thermal resistance of the honeycomb polyurethane insulation module. PU The thermal resistance of the urethane foam core; R aerogel R is the thermal resistance of the insulating rod. ply An insulating enclosure for the top and bottom surfaces of a urethane foam core; R ply，around It is an insulating box around the sides of a polyurethane foam core.

[0060] In another embodiment of the present invention, the insulating box is made of plywood with a thermal conductivity of 0.24 W / (m·K) and a thickness d2 ranging from 6 mm to 12 mm, and its thermal resistance is ignored.

[0061]

[0062] In the formula, R PU The thermal resistance of the polyurethane foam core; δ PU R represents the thickness of the polyurethane foam core. aerogel The thermal resistance of the insulating rod; δ aerogel γ is the thickness of the insulation rod; γ is the porosity of the honeycomb polyurethane insulation module; S is the panel area of ​​the polyurethane foam core; λ aerogel Let λ be the thermal conductivity of the insulating rod. PU is the thermal conductivity of the polyurethane foam core.

[0063] In another embodiment of the present invention, the thermal conductivity of the aerogel-modified honeycomb polyurethane insulation module is [value missing].

[0064]

[0065] In the formula, δ is the thickness of the honeycomb polyurethane insulation module; S is the panel area of ​​the polyurethane foam core; R total The total thermal resistance of the honeycomb polyurethane insulation module;

[0066] The heat flux density of the aerogel-modified honeycomb polyurethane insulation module is

[0067]

[0068] In the formula, Φ is the heat flow rate of the honeycomb polyurethane insulation module; ΔT is the temperature difference between the cold and hot ends of the honeycomb polyurethane insulation module; R totalThe total thermal resistance of the honeycomb polyurethane insulation module is given.

[0069] The density of the aerogel-modified honeycomb polyurethane insulation module is

[0070] ρ=ρ aerogel γ+ρ PU (1-γ)

[0071] In the formula, ρ is the density of the honeycomb polyurethane insulation module; ρ aerogel and ρ PU These are the densities of the aerogel and polyurethane foam core, respectively.

[0072] In another embodiment of the present invention, the polyurethane foam core is made of a low-temperature resistant material with a set strength, wherein the low-temperature resistant material can withstand a temperature of at least -163°C; the strength must meet the following requirements: shear strength in both the longitudinal and transverse directions must be ≥0.8 MPa at -100°C and at room temperature; tensile strength in the longitudinal direction must be ≥1.2 MPa, tensile strength in the transverse direction must be ≥2.7 MPa; and compressive strength in the longitudinal direction must be ≥1.2 MPa.

[0073] In another embodiment of the present invention, the outer shell of the insulation rod is an aluminum foil composite film selected from glass fiber cloth / aluminum foil material. The aluminum foil composite film has a sandwich structure with three layers and a total thickness of no more than 0.6 mm. The top and bottom layers are glass fiber cloth and the middle layer is aluminum foil. The aerogel inside the outer shell is selected from silica aerogel material.

[0074] In another embodiment of the present invention, the silica aerogel material is fiber or porous ceramic, the fiber including glass fiber, silica fiber and alumina fiber, etc.; the porous ceramic includes silica, zirconium oxide and zirconium oxide porous ceramic doped with yttrium oxide; the aerogel fills the outer shell, and the outer shell is vacuum sealed to improve the heat insulation effect; the outer shell surface of the heat insulation rod and the wall surface of the honeycomb pores are coated with adhesive, the adhesive being epoxy resin.

[0075] In another embodiment of the present invention, the material of the box body is plywood with a thickness ranging from 6mm to 12mm, the thickness of the perimeter of the polyurethane foam core is d1, where d1 ranges from 3mm to 30mm, the transverse extension plane is perpendicular to the longitudinal direction, the multiple walls of the honeycomb holes are connected to each other to form a closed surface, the included angle between each two walls is α, where α ranges from 37° to 143°, and the longitudinal direction is the heat conduction direction of the insulation module.

[0076] In another embodiment of the present invention, the thickness and spacing of the multiple walls of the honeycomb cells in the longitudinal direction are δ and T, respectively, where δ is 100mm to 450mm and T is 3mm to 30mm. The thickness of the polyurethane foam core, the thickness of the insulation rod, and the thickness of the honeycomb cells are equal. The length and width of the polyurethane foam core in the transverse extension plane are a and b, respectively, where a and b are 500mm to 4000mm. The inner diameter of the insulation rod in the transverse extension plane is D, where D is 45mm to 105mm.

[0077] In another embodiment of the present invention, the polyurethane foam core 2 has a honeycomb structure, including a perimeter 2a of the polyurethane foam core and a plurality of walls 6 extending along a longitudinal direction 21. The plurality of walls 6 are arranged in an array of adjacent honeycomb holes 7 along a transversely extending plane 20. The thickness of the perimeter 2a of the polyurethane foam core is d1. The transversely extending plane 20 is perpendicular to the longitudinal direction 21. The plurality of walls 6 of the honeycomb holes 7 are connected to each other to form a closed surface, with an angle α between every two walls 6. The longitudinal direction 21 is the heat conduction direction of the polyurethane insulation module 1.

[0078] The thickness and spacing of the multiple walls 6 of the honeycomb pores 7 in the longitudinal direction 21 are δ and T, respectively. The thickness of the polyurethane foam core 2, the thickness of the insulation rod 3, and the thickness of the honeycomb pores 7 are equal.

[0079] The length and width of the polyurethane foam core 2 on the transversely extending plane 20 are a and b, respectively. The inner diameter of the insulation rod on the transversely extending plane 20 is D.

[0080] The shape of the insulation rod 3 is hexagonal prism, cylinder, frustum, or prism with an arbitrary curve generatrix.

[0081] The outer shell of the insulation rod 3 is an aluminum foil composite film, selected from fiberglass cloth / aluminum foil material. The sandwich structure consists of three layers with a total thickness not exceeding 0.6 mm. The top and bottom layers are fiberglass cloth, and the middle layer is aluminum foil. The aerogel inside the outer shell is selected from silica aerogel material, preferably a silica aerogel composite material whose mechanical properties are improved by doping with materials that have low density, high tensile strength, and high compressive strength. The low density, high tensile strength, and high compressive strength materials are fibers or porous ceramics. The fibers include glass fibers, silica fibers, and alumina fibers, etc.; the porous ceramics include silica, zirconium oxide, and yttrium-doped zirconium oxide porous ceramics. The aerogel fills the outer shell, and the outer shell is vacuum-sealed to improve the thermal insulation effect. The outer shell surface 5 and the honeycomb pore wall surface 6 of the insulation rod 3 are coated with adhesive, which is epoxy resin.

[0082] The insulating box 4 surrounds the outer surface of the polyurethane foam core 2, and the insulating box 4 on the top and bottom surfaces of the polyurethane foam core 2 completely covers the polyurethane foam core 2 and the insulating box 4 around the sides of the polyurethane foam core 2. It should be noted that, for ease of demonstration of the honeycomb structure, in... Figure 1 The insulating box 4 located on top of the polyurethane foam core 2 is not shown. The insulating box 4 improves the structural integrity of the honeycomb polyurethane insulation module 1, reduces structural damage to the polyurethane foam core 2 and insulation rod 3 during transportation and installation, and enhances the ability to absorb energy during impacts. The box 4 is made of plywood, with a thickness d2 ranging from 6mm to 12mm.

[0083] The polyurethane foam core is made of a low-temperature resistant material with a set strength, wherein the low-temperature resistant material can withstand a temperature of at least -163°C; the strength must meet the following requirements, specifically, the shear strength in the longitudinal direction 21 and the transverse direction 22 must be ≥0.8 MPa at both -100°C and normal temperature; the tensile strength in the longitudinal direction 21 must be ≥1.2 MPa, the tensile strength in the transverse direction 22 must be ≥2.7 MPa; and the compressive strength in the longitudinal direction 21 must be ≥1.2 MPa.

[0084] In one embodiment of the present invention, an aerogel-modified honeycomb polyurethane insulation module includes a polyurethane foam core 2, insulation rods 3, and an insulating housing 4. The insulation rods 3 are disposed inside the polyurethane foam core 2, and the polyurethane foam core 2 surrounds the sides of the insulation rods 3. The length and width of the polyurethane foam core 2 on the transversely extending plane 20 are a and b, respectively. The thickness and spacing of the insulation rods are δ and T, respectively. The inner diameter of the insulation rods is D, and the number of insulation rods in the polyurethane foam core is n. The porosity of the honeycomb polyurethane insulation module is γ.

[0085] The insulation rod 3 is a regular hexagonal prism;

[0086] The outer shell material of the insulation rod is selected from aluminum foil composite film, which is composed of glass fiber cloth and aluminum foil. The sandwich structure has three layers with a thickness of 0.6 mm. The top and bottom layers are glass fiber cloth, and the middle layer is aluminum foil. The aerogel material inside the outer shell is selected from silica aerogel doped with glass fiber.

[0087] The parameters are: γ = 33%; T = 6.0 mm; D = 10.00 mm; n = 70; a = 150 mm; b = 123 mm; δ = 30 mm; λ PU =0.032W / (m·K); λ aerogel =0.013W / (m·K); ρ aerogel =3kg / m 3 ;ρ PU =120kg / m 3.

[0088] The thermal conductivity of the honeycomb polyurethane insulation module is 0.026 W / (m·K), which is 19.59% lower than that of the polyurethane foam insulation module after aerogel modification. The density of the honeycomb polyurethane insulation module is 81.4 kg / m³. 3 Compared to polyurethane foam insulation modules, the density of the aerogel-modified honeycomb polyurethane insulation module is reduced by 32.18%. At cold-end and hot-end temperatures of -163℃ and 20℃ respectively, the heat flux density of the honeycomb polyurethane insulation module is 161 W / m³. 2 .

[0089] In another embodiment of the present invention, an aerogel-modified honeycomb polyurethane insulation module includes a polyurethane foam core 2, insulation rods 3, and an insulating housing 4. The insulation rods 3 are disposed inside the polyurethane foam core 2, and the polyurethane foam core 2 surrounds the sides of the insulation rods 3. The length and width of the polyurethane foam core 2 on the transversely extending plane 20 are a and b, respectively. The thickness and spacing of the insulation rods are δ and T, respectively. The inner diameter of the insulation rods is D, and the number of insulation rods in the polyurethane foam core is n. The porosity of the honeycomb polyurethane insulation module is γ.

[0090] The insulation rod 3 is a regular hexagonal prism;

[0091] The outer shell material of the insulation rod is selected from aluminum foil composite film, which is composed of fiberglass cloth and aluminum foil. The sandwich structure has three layers with a thickness of 0.6 mm. The top and bottom layers are fiberglass cloth, and the middle layer is aluminum foil. The aerogel material inside the outer shell is selected from silica aerogel.

[0092] The parameters are: γ = 55%; T = 5.0 mm; D = 12.94 mm; n = 70; a = 150 mm; b = 123 mm; δ = 30 mm; λ PU =0.032W / (m·K); λ aerogel =0.013W / (m·K); ρ aerogel =3kg / m 3 ;ρ PU =120kg / m 3 .

[0093] The thermal conductivity of the honeycomb polyurethane insulation module is 0.026 W / (m·K), which is 32.66% lower than that of the polyurethane foam insulation module after aerogel modification. The density of the honeycomb polyurethane insulation module is 55.7 kg / m³. 3Compared to polyurethane foam insulation modules, the density of the aerogel-modified honeycomb polyurethane insulation module is reduced by 53.62%. At cold-end and hot-end temperatures of -163℃ and 20℃ respectively, the heat flux density of the honeycomb polyurethane insulation module is 135 W / m³. 2 .

[0094] In another embodiment of the present invention, an aerogel-modified honeycomb polyurethane insulation module includes a polyurethane foam core 2, insulation rods 3, and an insulating housing 4. The insulation rods 3 are disposed inside the polyurethane foam core 2, and the polyurethane foam core 2 surrounds the sides of the insulation rods 3. The length and width of the polyurethane foam core 2 on the transversely extending plane 20 are a and b, respectively. The thickness and spacing of the insulation rods are δ and T, respectively. The inner diameter of the insulation rods is D, and the number of insulation rods in the polyurethane foam core is n. The porosity of the honeycomb polyurethane insulation module is γ.

[0095] The insulation rod 3 is a regular hexagonal prism;

[0096] The outer shell material of the insulation rod is selected from aluminum foil composite film, which is composed of fiberglass cloth and aluminum foil. The sandwich structure has three layers with a thickness of 0.6 mm. The top and bottom layers are fiberglass cloth, and the middle layer is aluminum foil. The aerogel material inside the outer shell is selected from silica aerogel.

[0097] The parameters are: γ = 60%; T = 4.0 mm; D = 13.51 mm; n = 70; a = 150 mm; b = 123 mm; δ = 30 mm; λ PU =0.032W / (m·K); λ aerogel =0.013W / (m·K); ρ aerogel =3kg / m 3 ;ρ PU =120kg / m 3 .

[0098] The thermal conductivity of the honeycomb polyurethane insulation module is 0.026 W / (m·K), which is 35.63% lower than that of the polyurethane foam insulation module after aerogel modification. The density of the honeycomb polyurethane insulation module is 49.8 kg / m³. 3 Compared to polyurethane foam insulation modules, the density of the aerogel-modified honeycomb polyurethane insulation module is reduced by 58.50%. At cold-end and hot-end temperatures of -163℃ and 20℃ respectively, the heat flux density of the honeycomb polyurethane insulation module is 129 W / m³. 2 .

[0099] In another embodiment of the present invention, an aerogel-modified honeycomb polyurethane insulation module includes a polyurethane foam core 2, insulation rods 3, and an insulating housing 4. The insulation rods 3 are disposed inside the polyurethane foam core 2, and the polyurethane foam core 2 surrounds the sides of the insulation rods 3. The length and width of the polyurethane foam core 2 on the transversely extending plane 20 are a and b, respectively. The thickness and spacing of the insulation rods are δ and T, respectively. The inner diameter of the insulation rods is D, and the number of insulation rods in the polyurethane foam core is n. The porosity of the honeycomb polyurethane insulation module is γ.

[0100] The insulation rod 3 is a regular hexagonal prism;

[0101] The outer shell material of the insulation rod is selected from aluminum foil composite film, which is composed of fiberglass cloth and aluminum foil. The sandwich structure has three layers with a thickness of 0.6 mm. The top and bottom layers are fiberglass cloth, and the middle layer is aluminum foil. The aerogel material inside the outer shell is selected from silica aerogel.

[0102] The parameters are: γ = 65%; T = 3.0 mm; D = 14.07 mm; n = 70; a = 150 mm; b = 123 mm; δ = 30 mm; λ PU =0.032W / (m·K); λ aerogel =0.013W / (m·K); ρ aerogel =3kg / m 3 ;ρ PU =120kg / m 3 .

[0103] The thermal conductivity of the honeycomb polyurethane insulation module is 0.019 W / (m·K), which is 38.59% lower than that of the polyurethane foam insulation module after aerogel modification. The density of the honeycomb polyurethane insulation module is 43.95 kg / m³. 3 Compared to polyurethane foam insulation modules, the density of the aerogel-modified honeycomb polyurethane insulation module is reduced by 63.38%. At cold-end and hot-end temperatures of -163℃ and 20℃ respectively, the heat flux density of the honeycomb polyurethane insulation module is 123 W / m³. 2

[0104] The above are preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An aerogel-modified honeycomb polyurethane insulation module, characterized in that, The honeycomb polyurethane insulation module includes: a polyurethane foam core, an insulation rod, and an insulation box. The insulation rod is disposed inside the polyurethane foam core and includes an outer shell surrounded by a film for structural protection, the outer shell being filled with aerogel. The polyurethane foam core has a honeycomb structure, including the four edges of the polyurethane foam core and multiple walls extending along the longitudinal direction; the multiple walls have multiple adjacent honeycomb holes arranged in a transversely extending planar array. The polyurethane foam core surrounds the side of the insulation rod; the insulating box surrounds the outer surface of the polyurethane foam core, and the insulating box on the top and bottom surfaces of the polyurethane foam core completely covers the polyurethane foam core and the insulating box around the sides of the polyurethane foam core.

2. The aerogel-modified honeycomb polyurethane insulation module according to claim 1, characterized in that, The shape of the insulation rod is a cylinder or frustum consisting of at least a hexagonal prism, a cylinder or a frustum, or a column or frustum whose generatrix is ​​a curve.

3. The aerogel-modified honeycomb polyurethane insulation module according to claim 1, characterized in that, Both the polyurethane foam core and the aerogel are made of materials that meet the set thermal conductivity requirements. Specifically, the polyurethane foam core meets the set thermal conductivity requirements in the range of 0.024 W / (m·K) to 0.032 W / (m·K), and the aerogel meets the set thermal conductivity requirements in the range of 0.013 W / (m·K) to 0.024 W / (m·K).

4. The aerogel-modified honeycomb polyurethane insulation module according to claim 1, characterized in that, The porosity of the polyurethane foam core is 33% to 70%. Where, δ aerogel =δ PU =δ is the thickness of the honeycomb polyurethane insulation module, S is the panel area of ​​the polyurethane foam core, S = a × b, where a and b are the length and width of the polyurethane foam core in the transverse extension plane, respectively; A aerogel The area of ​​all the insulation rods on the transversely extending plane 20. D is the inner diameter of the hexagonal insulation rod, and n is the number of insulation rods in the polyurethane foam core.

5. The aerogel-modified honeycomb polyurethane insulation module according to claim 1, characterized in that, The total thermal resistance of the honeycomb polyurethane insulation module is: In the formula, R total R represents the total thermal resistance of the honeycomb polyurethane insulation module. PU The thermal resistance of the urethane foam core; R aerogel R is the thermal resistance of the insulating rod. ply An insulating enclosure for the top and bottom surfaces of a urethane foam core; R ply，around It is an insulating box around the sides of a polyurethane foam core.

6. The aerogel-modified honeycomb polyurethane insulation module according to claim 1, characterized in that, The insulating box is made of plywood with a thermal conductivity of 0.24 W / (m·K) and a thickness d2 ranging from 6 mm to 12 mm. Its thermal resistance is negligible. In the formula, R PU The thermal resistance of the polyurethane foam core; δ PU R represents the thickness of the polyurethane foam core. aerogel The thermal resistance of the insulating rod; δ aerogel γ is the thickness of the insulation rod; γ is the porosity of the honeycomb polyurethane insulation module; S is the panel area of ​​the polyurethane foam core; λ aerogel Let λ be the thermal conductivity of the insulating rod. PU is the thermal conductivity of the polyurethane foam core.

7. The aerogel-modified honeycomb polyurethane insulation module according to claim 1, characterized in that, The thermal conductivity of the aerogel-modified honeycomb polyurethane insulation module is: In the formula, δ is the thickness of the honeycomb polyurethane insulation module; S is the panel area of ​​the polyurethane foam core; R total The total thermal resistance of the honeycomb polyurethane insulation module; The heat flux density of the aerogel-modified honeycomb polyurethane insulation module is In the formula, Φ is the heat flow rate of the honeycomb polyurethane insulation module; ΔT is the temperature difference between the cold and hot ends of the honeycomb polyurethane insulation module; R total The total thermal resistance of the honeycomb polyurethane insulation module; The density of the aerogel-modified honeycomb polyurethane insulation module is p=p aerogel c+r PU (1-c) In the formula, ρ is the density of the honeycomb polyurethane insulation module; ρ aerogel and ρ PU These are the densities of the aerogel and polyurethane foam core, respectively.

8. The aerogel-modified honeycomb polyurethane insulation module according to claim 1, characterized in that, The polyurethane foam core is made of a low-temperature resistant material with a set strength, wherein the low-temperature resistant material can withstand a temperature of at least -163℃; the strength must meet the following requirements: shear strength in both the longitudinal and transverse directions must be ≥0.8MPa at -100℃ and at room temperature; tensile strength in the longitudinal direction must be ≥1.2MPa, tensile strength in the transverse direction must be ≥2.7MPa; compressive strength in the longitudinal direction must be ≥1.2MPa.

9. The aerogel-modified honeycomb polyurethane insulation module according to claim 1, characterized in that, The outer shell of the insulation rod is an aluminum foil composite film, selected from fiberglass cloth / aluminum foil material. The aluminum foil composite film has a sandwich structure with three layers and a total thickness of no more than 0.6 mm. The top and bottom layers are fiberglass cloth, and the middle layer is aluminum foil. The aerogel inside the outer shell is selected from silica aerogel material.

10. The aerogel-modified honeycomb polyurethane insulation module according to claim 9, characterized in that, The silica aerogel material is fiber or porous ceramic, including glass fiber, silica fiber and alumina fiber, etc.; the porous ceramic includes silica, zirconium oxide and zirconium oxide porous ceramic doped with yttrium oxide; the aerogel fills the shell, and the shell is vacuum sealed to improve the heat insulation effect; the outer shell surface of the insulation rod and the wall surface of the honeycomb holes are coated with adhesive, and the adhesive is epoxy resin.

11. The aerogel-modified honeycomb polyurethane insulation module according to claim 1, characterized in that, The housing is made of plywood with a thickness ranging from 6mm to 12mm. The thickness of the perimeter of the polyurethane foam core is d1, which ranges from 3mm to 30mm. The horizontally extending plane is perpendicular to the longitudinal direction. Multiple walls of the honeycomb cells are connected to each other to form a closed surface. The included angle between any two walls is α, which ranges from 37° to 143°. The longitudinal direction is the heat conduction direction of the insulation module.

12. The aerogel-modified honeycomb polyurethane insulation module according to claim 1, characterized in that, The thickness and spacing of the multiple walls of the honeycomb cells in the longitudinal direction are δ and T, respectively, where δ is 100mm to 450mm and T is 3mm to 30mm. The thickness of the polyurethane foam core, the thickness of the insulation rod, and the thickness of the honeycomb cells are equal. The length and width of the polyurethane foam core on the transverse extension plane are a and b, respectively, with a and b ranging from 500mm to 4000mm. The inner diameter of the insulation rod on the transverse extension plane is D, with D ranging from 45mm to 105mm.

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