Cold storage and insulation panel, liquefied gas storage device and transport ship

Abstract

The application belongs to the technical field of heat preservation and provides a cold storage and heat insulation plate, which comprises a cold storage layer and a heat insulation layer; the cold storage layer comprises a first cold storage layer to an Nth cold storage layer, the cold storage layer realizes cold energy supplement of liquefied gas and slows down heat transfer; among the first cold storage layer to the Nth cold storage layer, the component material of the ith cold storage layer comprises an ith cold storage material, the ith cold storage material has an ith phase change temperature, the ith phase change temperature is less than an ith+1 phase change temperature, N is an integer greater than 1, i is a positive integer less than or equal to N, the multilevel supplement of the cold energy of the liquefied gas and the effective regulation and control of the cold energy release rate of the liquefied gas are realized; the heat insulation layer is located between the first cold storage layer and the Nth cold storage layer, the heat insulation layer comprises a first heat insulation layer to an Mth heat insulation layer, M is a positive integer less than N, the heat insulation plate has good heat insulation effect, and the overall size of the cold storage and heat insulation plate is effectively reduced. The application also provides a liquefied gas storage device and a transport ship comprising the above cold storage and heat insulation plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat preservation, in particular to a cold storage heat insulation plate, a liquefied gas storage device and a transport ship. BACKGROUND

[0002] Liquefied gas includes liquefied natural gas (LNG), liquefied petroleum gas (LPG) and liquid ethane (LEG), etc. Due to its high energy density and convenient transportation characteristics, it occupies an important position in energy transportation. Liquefied gas is often transported by liquefied gas transport ships. At present, the transport ships mainly have tank type and membrane type structures. The transport ship with tank type structure stores liquefied gas in independent storage tanks, and the transport ship with membrane type structure takes the inner shell of the ship body as the load-bearing shell.

[0003] In the mode structure of the transport ship, a metal plate layer is arranged in the liquefied gas cabin, which directly contacts with the low-temperature liquefied gas and can prevent the liquefied gas from leaking. In order to reduce the vaporization rate of the liquefied gas, a heat insulation layer is arranged between the metal plate layer and the inner shell of the ship body. The commonly used heat insulation materials of the heat insulation layer include polyurethane board, phenolic heat preservation board and polystyrene board, etc. These heat insulation materials have low thermal conductivity and can provide good heat insulation effect. However, these heat insulation materials can only provide heat insulation function and cannot adjust the temperature. During the transportation of liquefied gas, heat transfer between the external environment and the liquefied gas is an inevitable problem. This heat transfer will cause the vaporization of the liquefied gas, thereby causing the loss of the liquefied gas. SUMMARY

[0004] Based on the problem of the loss of liquefied gas caused by the heat transfer between the external environment and the liquefied gas in the prior art, the purpose of the present application is to provide a cold storage heat insulation plate, a liquefied gas storage device and a transport ship, which can effectively reduce the evaporation efficiency of the liquefied gas, delay the evaporation time and reduce the loss of the liquefied gas.

[0005] To achieve the above-mentioned purpose and other related purposes, the present application provides a cold storage heat insulation plate applied in the transportation of liquefied gas, comprising:

[0006] A cold storage layer, comprising first to Nth cold storage layers stacked in sequence, the liquefied gas is stored on one side of the first cold storage layer of the cold storage heat insulation plate, the external environment is located on one side of the Nth cold storage layer of the cold storage heat insulation plate, the composition material of the ith cold storage layer among the first to Nth cold storage layers comprises an ith cold storage material, the ith cold storage material has an ith phase change temperature, and the ith phase change temperature is less than an ith+1 phase change temperature, wherein N is an integer greater than 1, and i is a positive integer less than or equal to N;

[0007] A thermal insulation layer is arranged between the first cold storage layer and the Nth cold storage layer, and the thermal insulation layer comprises a first thermal insulation layer to an Mth thermal insulation layer, wherein M is a positive integer less than N.

[0008] Optionally, N is 2 and M is 1, the cold storage layers comprise a first cold storage layer and a second cold storage layer, and the thermal insulation layer comprises a first thermal insulation layer arranged between the first cold storage layer and the second cold storage layer.

[0009] Optionally, the jth thermal insulation layer has oppositely arranged first and second thermal insulation shell layers, the first thermal insulation shell layer is in contact with the ith cold storage layer, and the second thermal insulation shell layer is in contact with the ith+1 cold storage layer, wherein j is a positive integer less than or equal to M.

[0010] Optionally, N is 3, and the cold storage layers comprise a first cold storage layer, a second cold storage layer and a third cold storage layer stacked in sequence.

[0011] Optionally, M is 1, and the thermal insulation layer comprises a first thermal insulation layer arranged between the second cold storage layer and the third cold storage layer.

[0012] Optionally, the first phase transition temperature t x1 is the same as the storage temperature t0 of the liquefied gas.

[0013] Optionally, the second phase transition temperature t x2 is related to the thickness δ2 of the second cold storage layer and the thermal conductivity λ2 of the second cold storage layer according to t x2 = δ2*q / λ2+t0, wherein q is the heat transfer amount between the liquefied gas and the external environment.

[0014] Optionally, the third phase transition temperature t x3 is related to the thickness δ3 of the third cold storage layer and the thermal conductivity λ3 of the third cold storage layer according to t x3 = δ3*q / λ3+t x2 +t xg1 , wherein t xg1 = δ g1 *q / λ g1 , δ g1 is the thickness of the first thermal insulation layer, and λ g1 is the thermal conductivity of the first thermal insulation layer.

[0015] The application further provides a liquefied gas storage device comprising an isolation layer and any one of the cold storage and thermal insulation plates in the foregoing embodiments, a first storage space is formed in the isolation layer, liquefied gas is stored in the first storage space, and the cold storage and thermal insulation plate is wrapped on the outside of the isolation layer.

[0016] The application also provides a liquefied gas transport ship, comprising a liquid cargo hold inner hull and any one of the foregoing embodiments of the cold storage insulation plate, which is located between the liquid cargo hold and the inner hull of the ship, and the liquefied gas is stored in the liquid cargo hold.

[0017] The cold storage insulation plate, the liquefied gas storage device and the transport ship provided by the application have at least the following beneficial effects:

[0018] The cold storage insulation plate of the embodiment uses the cold storage layer to realize cold supplement of the liquefied gas, reduces the vaporization speed of the liquefied gas, and delays the evaporation time of the liquefied gas. When the ambient temperature rises, the heat transfer rate of the ambient environment to the liquefied gas can be slowed down. The insulation plate has good heat insulation effect, can effectively reduce the overall size of the cold storage insulation plate, save manufacturing cost, ensure the heat insulation and protection effect of the liquefied gas, and the phase change temperature of the cold storage layer increases layer by layer from the first cold storage layer to the Nth cold storage layer. Through multi-level storage of cold, multi-level supplement of cold of the liquefied gas is realized, the outflow time of the cold of the liquefied gas is effectively slowed down, the release rate of the cold of the liquefied gas is effectively regulated, and the loss of the liquefied gas is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 The structure schematic diagram of the cold storage insulation plate provided by the first embodiment of the application is shown.

[0021] Figure 2 The structure schematic diagram of the cold storage insulation plate provided by the optional embodiment in the first embodiment of the application is shown.

[0022] Figure 3 The structure schematic diagram of the cold storage insulation plate provided by another optional embodiment in the first embodiment of the application is shown.

[0023] Figure 4 The structure schematic diagram of the liquefied gas storage device provided by the second embodiment of the application is shown.

[0024] Figure 5 The structure schematic diagram of the liquefied gas storage device provided by the second embodiment of the application is shown. Figure 4 The cross-sectional view of the side wall of the liquefied gas storage device is shown.

[0025] Figure 6A structural schematic view of a liquefied gas carrier is shown in accordance with the third embodiment of the present application.

[0026] Figure 7 A structural schematic view of a liquefied gas carrier is shown in accordance with the third embodiment of the present application. Figure 6 A structural schematic view of a liquefied gas carrier is shown in accordance with the third embodiment of the present application.

[0027] Figure 8 A structural schematic view of a liquefied gas carrier is shown in accordance with the third embodiment of the present application. Figure 6 A structural schematic view of a liquefied gas carrier is shown in accordance with the third embodiment of the present application.

[0028] Reference signs are shown schematically:

[0029] 1, cold storage board; 11, cold storage layer; 111, first cold storage layer; 112, second cold storage layer; 113, third cold storage layer; 114, fourth cold storage layer; 12, thermal insulation layer; 1201, first thermal insulation outer shell layer; 1202, second thermal insulation outer shell layer; 121, first thermal insulation layer; 122, second thermal insulation layer; 2, liquefied gas storage device; 21, isolation layer; 3, liquefied gas carrier; 31, cargo tank; 311, first bulkhead; 32, inner hull; 33, outer hull. DETAILED DESCRIPTION

[0030] In order to make the technical purposes, technical solutions and technical effects of the present application clearer, the technical solutions in the present application will be described clearly and completely in combination with embodiments below. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present application is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application. In addition, the terms “first”, “second” are only for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms “center”, “longitudinal”, “transverse”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer” and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0033] In the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection. In addition, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present description, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples as appropriate.

[0034] Embodiment one

[0035] The present embodiment provides a cold storage insulation board 1 applied to liquefied gas transportation, referring to Figure 1 The cold storage insulation board 1 of the present embodiment includes a cold storage layer 11 and an insulation layer 12.

[0036] The cold storage layer 11 includes first cold storage layer 111 to Nth cold storage layer stacked in sequence, liquefied gas is stored on the side of the first cold storage layer 111 of the cold storage insulation board 1, the external environment is located on the side of the Nth cold storage layer of the cold storage insulation board 1, among the first cold storage layer 111 to the Nth cold storage layer, the composition material of the ith cold storage layer includes the ith cold storage material, the ith cold storage material has the ith phase change temperature, the ith phase change temperature is less than the ith+1 phase change temperature, wherein N is an integer greater than 1, i is a positive integer less than or equal to N. The insulation layer 12 is located between the first cold storage layer 111 and the Nth cold storage layer, and the insulation layer 12 includes the first insulation layer 121 to the Mth insulation layer, wherein M is a positive integer less than N.

[0037] In the present embodiment, the cold storage layer 11 can supplement the cold energy for the evaporation of liquefied gas by releasing cold energy, so as to reduce the evaporation speed of liquefied gas, when the external environment rises, the heat transfer of the external environment to the liquefied gas can be slowed down, the efficiency of heat transfer is reduced, the insulation board has good insulation effect, the overall size of the cold storage insulation board 1 can be effectively reduced, the manufacturing cost is saved, the insulation and protection effect of the liquefied gas is ensured, the phase change temperature of the cold storage layer 11 is increased from the first cold storage layer 111 to the Nth cold storage layer, the multi-level storage of the cold energy of the liquefied gas is realized, the time of the cold energy of the liquefied gas is effectively slowed down, the release rate of the cold energy of the liquefied gas is effectively controlled, and the loss of the liquefied gas is reduced.

[0038] In the present embodiment, referring to Figure 2The jth thermal insulation layer has a first thermal insulation shell layer 1201 and a second thermal insulation shell layer 1202 arranged oppositely, the first thermal insulation shell layer 1201 is in contact with the ith cold storage layer, and the second thermal insulation shell layer 1202 is in contact with the ith+1 cold storage layer, wherein j is a positive integer less than or equal to M. The jth thermal insulation layer is kept flat by the first thermal insulation shell layer 1201 and the second thermal insulation shell layer 1202, so as to ensure that the thermal insulation layer 12 is closely attached to the cold storage layer 11.

[0039] In an optional embodiment, referring to Figure 2 The value of N may be 2, and the value of M may be 1, for example. In this case, the cold storage layer 11 includes a first cold storage layer 111 and a second cold storage layer 112, and the thermal insulation layer 12 includes a first thermal insulation layer 121 located between the first cold storage layer 111 and the second cold storage layer 112. Optionally, the phase change temperature of the first cold storage layer 111 is higher than the temperature of the liquefied gas, the first cold storage layer 111 is composed of a first phase change material having a first phase change temperature, and the second cold storage layer 112 is composed of a second phase change material having a second phase change temperature. When the temperature of the liquefied gas is lower than the first phase change temperature, the first cold storage layer 111 stores cold energy. When the temperature of the liquefied gas continues to rise to the first phase change temperature and the second phase change temperature, the first cold storage layer 111 and the second cold storage layer 112 release cold energy in stages to slow down the outflow time of the cold energy of the liquefied gas, regulate the release rate of the cold energy of the liquefied gas, the first thermal insulation layer 121 has excellent thermal insulation effect, can slow down the outflow of the cold energy of the liquefied gas, and the second phase change temperature is relatively high. When the cold storage and thermal insulation plate 1 is applied to a liquefied gas transport ship, the second cold storage layer 112 is in contact with the inner hull 32 of the ship, the temperature of the second cold storage layer 112 remains unchanged during the phase change process, and can adjust the temperature change of the inner hull 32 of the ship, thereby improving the thermal stress deformation of the inner hull 32 of the ship.

[0040] In an optional embodiment, referring to Figure 3For example, N can be 4 and M can be 2, and the cold storage layer 11 includes a first cold storage layer 111, a second cold storage layer 112, a third cold storage layer 113, and a fourth cold storage layer 114, and the thermal insulation layer 12 includes a first thermal insulation layer 121 and a second thermal insulation layer 122, the first thermal insulation layer 121 is located between the second cold storage layer 112 and the third cold storage layer 113, and the second thermal insulation layer 122 is located between the third cold storage layer 113 and the fourth cold storage layer 114. The first cold storage layer 111 is made of a first phase change material with a first phase change temperature, the second cold storage layer 112 is made of a second phase change material with a second phase change temperature, the third cold storage layer 113 is made of a third phase change material with a third phase change temperature, and the fourth cold storage layer 114 is made of a fourth phase change material with a fourth phase change temperature, and the first phase change temperature, the second phase change temperature, the third phase change temperature, and the fourth phase change temperature increase in turn.

[0041] In this embodiment, the cold storage layer 11 is a solid-solid phase change phase change storage plate made of a phase change material, for example, a phase change storage plate formed by integrally molding a phase change material to form a plate structure. Adjacent cold storage layers and adjacent cold storage layers and thermal insulation layers are fixedly connected, and optionally, adjacent cold storage layers and adjacent cold storage layers and thermal insulation layers are fixedly connected by adhesive bonding. The thermal insulation layer 12 can be a thermal insulation plate made of a thermal insulation material, or can also be a vacuum thermal insulation plate, and optionally, the thermal insulation layer 12 is a polyurethane plate.

[0042] In an optional embodiment, N can be 3, for example, and the cold storage layer 11 includes a first cold storage layer 111, a second cold storage layer 112, and a third cold storage layer 113 stacked in turn, the first cold storage layer 111 is made of a first cold storage material with a first phase change temperature, the second cold storage layer 112 is made of a second cold storage material with a second phase change temperature, and the third cold storage layer 113 is made of a third cold storage material with a third phase change temperature, the first phase change temperature is less than the second phase change temperature, and the second phase change temperature is less than the third phase change temperature.

[0043] In an optional embodiment, the value of N is 3, the value of M is 1, the cold storage layer 11 comprises a first cold storage layer 111, a second cold storage layer 112 and a third cold storage layer 113 which are sequentially stacked, the thermal insulation layer 12 comprises a first thermal insulation layer 121, the first thermal insulation layer 121 is located between the second cold storage layer 112 and the third cold storage layer 113, the first cold storage layer 111 is composed of a first cold storage material having a first phase change temperature, the second cold storage layer 112 is composed of a second cold storage material having a second phase change temperature, the third cold storage layer 113 is composed of a third cold storage material having a third phase change temperature, and the first thermal insulation layer 121 is composed of a first thermal insulation material, which is optionally a polyurethane board, a phenolic insulation board, a polystyrene board or other suitable material, or the first thermal insulation layer 121 can also be a vacuum board, and the embodiment is not limited thereto. The first phase change temperature is less than the second phase change temperature, and the second phase change temperature is less than the third phase change temperature.

[0044] Further, the value of N is 3, the value of M is 1, and in the cold storage and thermal insulation board 1, the first cold storage layer 111 is an ultralow-temperature solid-solid phase change cold storage board, the first phase change temperature of the first cold storage layer 111 is denoted as t x1 , the storage temperature of the liquefied gas is denoted as t0, the first phase change temperature t x1 is equal to the storage temperature t0 of the liquefied gas, and the temperature of the phase change material remains constant during the phase change, so that t x1 is equal to t0, which can ensure the recooling effect on the liquefied gas. When the actual temperature of the liquefied gas is higher than the first phase change temperature, the ultralow-temperature solid-solid phase change cold storage board releases cold energy, reduces the evaporation amount of the liquefied gas, and delays the evaporation time of the liquefied gas. The heat transfer amount between the liquefied gas and the external environment is denoted as q, the material of the first cold storage layer 111 is configured according to the storage temperature of the liquefied gas, and the thickness of the first cold storage layer 111 can be adaptively set according to the heat transfer amount q and the cold storage density of the first cold storage material. Optionally, q can be given by the following formula: q = h * (t1-t0), h is the total heat transfer coefficient between the liquefied gas and the external environment, with the unit of W / (m 2 ·℃), and t1 is the temperature of the external environment.

[0045] Further, the value of N is 3, the value of M is 1, and in the cold storage and thermal insulation board 1, the second cold storage layer 112 is a low-temperature solid-solid phase change cold storage board, the thickness of the second cold storage layer 112 is denoted as δ2 with the unit of m, the thermal conductivity of the second cold storage layer 112 is denoted as λ2 with the unit of W / (m·℃), and the second phase change temperature of the second cold storage layer 112 is denoted as t x2 , the second phase change temperature t x2 is greater than the first phase change temperature t x1 =t0, and when the actual temperature of the liquefied gas is higher than the first phase change temperature t x1When the temperature of the liquefied gas continues to rise to be greater than the second phase change temperature t x2 When the temperature of the liquefied gas continues to rise to be greater than the second phase change temperature t x2 When the temperature of the liquefied gas continues to rise to be greater than the second phase change temperature t x2 When the temperature of the liquefied gas continues to rise to be greater than the second phase change temperature t x2 When the temperature of the liquefied gas continues to rise to be greater than the second phase change temperature t

[0046] Further, the value of N is 3, and the value of M is 1. In the cold storage heat insulation plate 1, the thickness of the first heat insulation layer 121 is δ g1 , the unit is m, the thermal conductivity of the first heat insulation layer 121 is λ g1 , the unit is W / (m·℃), the temperatures of the relative two sides of the first heat insulation layer 121 are t wg1 and t wg2 , the temperature of the second cold storage layer 112 remains constant during the phase change, so t wg1 = t x2 , t wg2 = t xg1 + t wg1 , wherein t xg1 = δ g1 *q / λ g1 . The thickness of the first heat insulation layer 121 can be adaptively set according to the storage temperature t0 of the liquefied gas and the heat transfer quantity q. Optionally, the first heat insulation layer 121 comprises a first heat insulation shell layer, a polyurethane plate and a second heat insulation shell layer, and the polyurethane plate is located between the first heat insulation shell layer and the second heat insulation shell layer. Further, the first heat insulation shell layer and the second heat insulation shell layer are both aluminum foil layers, or the first heat insulation shell layer and the second heat insulation shell layer are both high-density polyurethane layers. The aluminum foil layer or the high-density polyurethane layer is used to make the first heat insulation layer 121 have a flat surface, so that the first heat insulation layer 121 is tightly attached to the second cold storage layer 112 and the third cold storage layer 113, respectively.

[0047] Further, the value of N is 3, the value of M is 1, in the cold storage insulation board 1, the third cold storage layer 113 is a high-temperature solid-solid phase change cold storage board, the thickness of the third cold storage layer 113 is δ3, the unit is m, the thermal conductivity of the third cold storage layer 113 is λ3, the unit is W / (m·℃), and the third phase change temperature of the third cold storage layer 113 is t x3 , the third phase change temperature t x3 is greater than t wg2 , when the temperature of the surface of the third cold storage layer 113 rises to the third phase change temperature t x3 , the third cold storage layer 113 releases cold energy to reduce the cold energy release rate of the liquefied gas, especially when the temperature of the external environment reaches the third phase change temperature t x3 , the third cold storage layer 113 can adjust the incoming rate of external heat, when the temperature of the external environment is lower than the third phase change temperature t x3 , the third cold storage layer 113 re-stores cold energy, realizes cyclic cold storage and cold release, and in use, the third cold storage layer 113 is in contact with the inner hull 32 of the ship, and the third cold storage layer 113 can adjust the temperature change of the inner hull 32 of the ship, thereby realizing the regulation and control of the thermal stress deformation of the inner hull 32 of the ship. Optionally, the relationship between the third phase change temperature t x3 , the thickness δ3 of the third cold storage layer 113 and the thermal conductivity λ3 of the third cold storage layer 113 is t x3 = δ3*q / λ3+t x2 +t xg1 , wherein t xg1 = δ g1 *q / λ g1 , t x2 +t xg1 =t wg2 ; when the third phase change temperature t x3 satisfies the above relationship, the third cold storage layer 113 has the best regulation and control effect on the cold energy release efficiency of the liquefied gas.

[0048] In this embodiment, the cold storage insulation board 1 adopts a four-layer structure, the value of N is 3, the value of M is 1, and it includes the first cold storage layer 111, the second cold storage layer 112, the first insulation layer 121 and the third cold storage layer 113. The first phase change temperature of the first cold storage layer 111 is equal to the storage temperature of the liquefied gas, which can effectively realize the recooling of the liquefied gas, the second phase change temperature of the second cold storage layer 112 is controlled to be t x2 , which can effectively regulate the cold energy release rate of the liquefied gas, the first insulation layer 121 can make the cold storage insulation board 1 have a smaller thickness, avoid excessive occupation of the ship body space, and cause the storage space of the liquefied gas to be reduced, and the third phase change temperature of the third cold storage layer 113 is controlled to be t x3, the third cold storage layer 113 is in contact with the inner hull 32 of the ship, and can effectively regulate the temperature change of the inner hull 32 of the ship, thereby regulating and controlling the thermal stress deformation of the inner hull 32 of the ship.

[0049] The cold storage and heat insulation plate 1 of the embodiment can supplement the cold energy of the liquefied gas by the cold storage layer 11, reduce the evaporation speed of the liquefied gas, slow down the heat transfer from the external environment to the liquefied gas when the external environment rises, and has good heat insulation effect, which can effectively reduce the overall size of the cold storage and heat insulation plate 1, save manufacturing cost, ensure the heat insulation and protection effect of the liquefied gas, and gradually increase the phase change temperature of the cold storage layer 11 from the first cold storage layer 111 to the Nth cold storage layer. Through multi-level storage of cold energy, multi-level supplement of cold energy of liquefied gas is realized, the release time of cold energy of liquefied gas is effectively slowed down, the release rate of cold energy of liquefied gas is effectively regulated, and the loss of liquefied gas is reduced.

[0050] Embodiment two

[0051] The embodiment provides a liquefied gas storage device 2, which refers to Figure 4 and Figure 5 , comprising an isolation layer 21 and any one of the cold storage and heat insulation plates 1 described in embodiment one, a first storage space is formed in the isolation layer 21, the liquefied gas is stored in the first storage space, and the cold storage and heat insulation plate 1 is wrapped on the outside of the isolation layer 21. Optionally, the isolation layer 21 is made of a metal sheet, and when storing liquefied gas, the liquefied gas is directly in contact with the isolation layer 21, which can effectively prevent the liquefied gas from leaking.

[0052] In an optional embodiment, the cold storage and heat insulation plate 1 adopts a four-layer structure, comprising a first cold storage layer 111, a second cold storage layer 112, a first heat insulation layer 121 and a third cold storage layer 113 which are stacked in sequence, and the first cold storage layer 111, the second cold storage layer 112, the first heat insulation layer 121 and the third cold storage layer 113 are connected by adhesion. The first cold storage layer 111 wraps the isolation layer 21 and is in contact with the isolation layer 21, and the third cold storage layer 113 is located on the outside of the liquefied gas storage device 2.

[0053] The liquefied gas storage device 2 of the embodiment also comprises the cold storage and heat insulation plate 1, and therefore also has the beneficial effects of embodiment one.

[0054] Embodiment three

[0055] The embodiment provides a liquefied gas transport ship 3, which refers to Figures 6 to 8The liquefied gas carrier 3 comprises a ship inner shell 32, a liquid cargo tank 31, and any one of the cold storage and insulation boards 1 described in Embodiment One, the liquefied gas is stored in the liquid cargo tank 31, the cold storage and insulation board 1 is wrapped outside the liquid cargo tank 31, and the ship inner shell 32 is wrapped outside the cold storage and insulation board 1, so that the cold storage and insulation board 1 is located between the liquid cargo tank 31 and the ship inner shell 32. Optionally, the liquefied gas carrier 3 further comprises a ship outer shell 33, and the ship outer shell 33 is wrapped outside the ship inner shell 32.

[0056] In an optional embodiment, the cold storage and insulation board 1 adopts a four-layer structure, comprising a first cold storage layer 111, a second cold storage layer 112, a first insulation layer 121, and a third cold storage layer 113 which are sequentially stacked, and the first cold storage layer 111, the second cold storage layer 112, the first insulation layer 121, and the third cold storage layer 113 are fixedly connected by adhesion, the liquid cargo tank 31 has a first tank wall 311 which encloses a second storage space, the liquefied gas is stored in the second storage space, the first cold storage layer 111 is wrapped around the first tank wall 311 of the liquid cargo tank 31 and is in contact with the first tank wall 311, and the third cold storage layer 113 is located on the side of the cold storage and insulation board 1 close to the ship inner shell 32 and is in contact with the ship inner shell 32.

[0057] In an optional embodiment, the cold storage and insulation board 1 adopts a four-layer structure, and N is valued as 3 and M is valued as 1, the first insulation layer 121 is located between the second cold storage layer 112 and the third cold storage layer 113, the first cold storage layer 111, the second cold storage layer 112, and the third cold storage layer 113 are super-low-temperature cold storage board, low-temperature cold storage board, and high-temperature cold storage board respectively, the liquefied gas is liquefied petroleum gas, the temperature of the liquefied petroleum gas in the liquid cargo tank 31 is -20℃, therefore, the first phase change temperature of the first cold storage layer 111 is -20℃. Before the liquid cargo tank 31 is filled with liquefied petroleum gas, the first cold storage layer 111 is cooled and stored by liquid nitrogen or other low-temperature gas, after the cooling and storage of the first cold storage layer 111 is completed, the liquid cargo tank 31 is filled with liquefied petroleum gas, the cold energy of the liquefied petroleum gas is transferred from the first cold storage layer 111 to the ship outer shell 33, and is stored in the second cold storage layer 112 and the third cold storage layer 113. In the process of transporting liquefied petroleum gas, the third cold storage layer 113 can release cold energy to prevent external heat from being transferred in, when the third cold storage layer 113 finishes releasing cold energy, the second cold storage layer 112 and the first cold storage layer 111 release cold energy in turn to prevent external heat from being transferred in, slow down the time of external heat being transferred in, and slow down the vaporization of the liquefied gas.

[0058] The liquefied gas carrier 3 of the present embodiment comprises the cold storage and insulation board 1, therefore, has the beneficial effects of Embodiment One, and the third cold storage layer 113 is in contact with the ship inner shell 32, which can effectively regulate the temperature change of the ship inner shell 32 and realize the regulation and control of the thermal stress deformation of the ship inner shell 32.

[0059] The above embodiments are only illustrative of the principles of the present application and its effects, and are not intended to limit the present application. Any modification, change or combination of the above embodiments made by those skilled in the art without departing from the spirit and scope of the present application shall be covered by the claims of the present application.

Claims

1. A cold accumulating insulation panel for use in the transport of liquefied gas, characterized in that The application relates to a cold storage and heat insulation board, which comprises a cold storage layer and a heat insulation layer. The cold storage layer is a solid-solid phase change cold storage board made of a phase change material, and comprises first to Nth cold storage layers which are stacked in sequence. The liquefied gas is stored on one side of the first cold storage layer of the cold storage and heat insulation board, and the external environment is located on the side of the Nth cold storage layer of the cold storage and heat insulation board.

2. The cold accumulating insulation panel according to claim 1, characterized in that The first to Nth cold storage layers are composed of the ith cold storage material, and the ith cold storage material has an ith phase change temperature which is lower than the (i+1)th phase change temperature.

3. The cold accumulating insulation panel according to claim 1, characterized in that The heat insulation layer is located between the first and Nth cold storage layers, and comprises first to Mth heat insulation layers, wherein M is a positive integer smaller than N.

4. The cold accumulating insulation panel according to claim 3, characterized in that The first to Mth heat insulation layers have oppositely arranged first and second heat insulation shell layers.

5. The cold accumulating insulation panel according to claim 4, characterized in that the first phase transition temperature t x1 the same as the storage temperature t0 of the liquefied gas.

6. The cold accumulating insulation panel according to claim 5, characterized in that Second phase transition temperature t x2 The relationship between the thickness δ2 of the second cold storage layer and the thermal conductivity λ2 of the second cold storage layer is t x2 = δ2 * q / λ2 + t0, where q is the heat transfer amount between the liquefied gas and the external environment.

7. The cold accumulating insulation panel according to claim 6, characterized in that Third phase transition temperature t x3 The relationship between the thickness δ3 of the third cold storage layer and the thermal conductivity λ3 of the third cold storage layer is t x3 = δ3 * q / λ3 + t x2 + t xg1 , wherein t xg1 = δ g1 * q / λ g1 , δ g1 is the thickness of the first heat insulation layer, and λ g1 is the thermal conductivity of the first heat insulation layer.

8. A liquefied gas storage device characterized by comprising: N is 2, M is 1, the cold storage layer comprises first and second cold storage layers, and the heat insulation layer comprises a first heat insulation layer which is located between the first and second cold storage layers.

9. A liquefied gas carrier, characterized in that N is 3, and the cold storage layer comprises first, second and third cold storage layers which are stacked in sequence. M is 1, the heat insulation layer comprises a first heat insulation layer which is located between the second and third cold storage layers. The application further relates to a cold storage and heat insulation board which comprises an isolation layer and the cold storage and heat insulation board as claimed in any one of claims 1 to 7. The application further relates to a cold storage and heat insulation board which comprises a liquid cargo tank, a ship inner shell and the cold storage and heat insulation board as claimed in any one of claims 1 to 7.

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