Simplified planar thermal insulation layer calculation method and device

Abstract

The invention provides a simplified planar thermal insulation layer calculation method and device. The surface temperature of a thermal insulation object and the outer surface temperature of a thermal insulation layer are determined; determining the average temperature of the insulating layer based on the surface temperature of the insulated object and the outer surface temperature of the insulating layer; determining a heat conductivity coefficient of a heat-insulating material of the heat-insulating layer corresponding to the average temperature of the heat-insulating layer; and determining the thickness of the insulating layer based on the surface temperature of the insulated object, the outer surface temperature of the insulating layer, the heat conductivity coefficient, the predetermined environment temperature and the heat exchange coefficient between the insulating material of the insulating layer and air. According to the invention, the efficiency and accuracy of thermal insulation layer thickness calculation can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of thermal insulation engineering, and in particular to a simplified planar thermal insulation layer calculation method and device. Background Art

[0002] Insulation is an important part of engineering design. The rationality of insulation design directly affects the normal operation and investment cost of equipment and processes. Insulation mainly involves covering the outer surface of the insulated object (such as equipment, pipelines, etc.) with a layer of insulation material as an insulation layer to prevent the insulated object from dissipating heat to the surrounding environment. The insulation layer can be divided into two categories according to the shape of the insulated object: cylindrical insulation layer and flat (flat wall) insulation layer. The cylindrical insulation layer is mainly used for the insulation of the surface of industrial pipelines, and the flat insulation layer is mainly used for the insulation of the factory ceiling or the surrounding walls and the insulation of the surface of box-type containers. The main task of insulation layer calculation is to determine the thickness of the insulation material based on the pipeline data, the properties of the insulation material and the insulation requirements. After selecting the thickness of the insulation material, it is necessary to calculate the actual heat dissipation loss and the outer surface temperature of the insulation layer again.

[0003] At present, the design specifications for industrial equipment and pipeline insulation engineering provide relevant calculation formulas for the thickness of planar insulation layers, in which the maximum heat loss method is used to calculate the thickness of the insulation layer. The outer surface temperature T s is unknown, the average temperature of the insulation layer T m The thermal conductivity of the insulation layer λ is T m In order to solve the insulation layer thickness δ, we can only assume in advance that the outer surface temperature of the insulation layer is T s , thereby reducing the unknowns in the equation. However, this method is not reliable and may lead to an unsolvable equation or a large deviation in the calculation results. In addition, the existing insulation layer calculation methods generally have problems such as numerous formulas, many unknown parameters, and repeated use of multiple equations to solve the same problem. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a simplified planar insulation layer calculation method and device to alleviate the above-mentioned problems existing in the related art.

[0005] In a first aspect, an embodiment of the present invention provides a simplified planar insulation layer calculation method, comprising: determining the surface temperature of an insulated object and the outer surface temperature of the insulation layer; determining the average temperature of the insulation layer based on the surface temperature of the insulated object and the outer surface temperature of the insulation layer; determining the thermal conductivity of the insulation material of the insulation layer corresponding to the average temperature of the insulation layer; determining the thickness of the insulation layer based on the surface temperature of the insulated object, the outer surface temperature of the insulation layer and the thermal conductivity as well as a predetermined ambient temperature and the heat exchange coefficient between the insulation material of the insulation layer and air.

[0006] In a second aspect, an embodiment of the present invention also provides a simplified planar insulation layer calculation device, comprising: a first determination module, used to determine the surface temperature of the insulated object and the outer surface temperature of the insulation layer; a second determination module, used to determine the average temperature of the insulation layer based on the surface temperature of the insulated object and the outer surface temperature of the insulation layer; a third determination module, used to determine the thermal conductivity of the insulation material of the insulation layer corresponding to the average temperature of the insulation layer; a fourth determination module, used to determine the thickness of the insulation layer based on the surface temperature of the insulated object, the outer surface temperature of the insulation layer and the thermal conductivity, as well as a predetermined ambient temperature and the heat exchange coefficient between the insulation material of the insulation layer and the air.

[0007] The embodiment of the present invention provides a simplified planar insulation layer calculation method and device, which determines the surface temperature of the insulated object and the outer surface temperature of the insulation layer; determines the average temperature of the insulation layer based on the surface temperature of the insulated object and the outer surface temperature of the insulation layer; determines the thermal conductivity of the insulation material of the insulation layer corresponding to the average temperature of the insulation layer; and determines the thickness of the insulation layer based on the surface temperature of the insulated object, the outer surface temperature and thermal conductivity of the insulation layer, as well as the predetermined ambient temperature and the heat exchange coefficient between the insulation material of the insulation layer and the air. Using the above technology, the previous derivation of the maximum heat loss method is reasonably simplified so that it meets the solution conditions of the outer surface temperature method, thereby achieving accurate calculation of the insulation layer thickness without providing an assumed initial value, thereby improving the efficiency and accuracy of the insulation layer thickness calculation.

[0008] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0009] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 Schematic diagram of a planar thermal insulation layer in an embodiment of the present invention;

[0012] Figure 2It is a schematic flow chart of a simplified planar thermal insulation layer calculation method in an embodiment of the present invention;

[0013] Figure 3 This is an algorithm example diagram of a simplified planar thermal insulation layer calculation method in an embodiment of the present invention;

[0014] Figure 4 A scatter plot of the outer surface temperature of the insulation layer and the thickness of the insulation layer in an embodiment of the present invention;

[0015] Figure 5 This is an example diagram of a commonly used insulation material performance table in the insulation layer calculation software in an embodiment of the present invention;

[0016] Figure 6 This is an example diagram of the thermal insulation layer calculation software interface in an embodiment of the present invention;

[0017] Figure 7 It is a structural schematic diagram of a simplified planar thermal insulation layer calculation device in an embodiment of the present invention. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described in combination with the embodiments below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Insulation in engineering design mainly involves covering the surface of the insulated object (such as equipment, pipes, etc.) with a layer of insulation material as an insulation layer to prevent the insulated object from dissipating heat to the surrounding environment. Flat (flat wall) insulation layers are mainly used for insulation of the roof or surrounding walls of factory buildings and the surface of box-type containers.

[0020] Figure 1 Schematic diagram of a planar thermal insulation layer in an embodiment of the present invention. Figure 1 As shown, the surface temperature of the insulated object 101 is usually a constant value, which is the same as the inner surface temperature of the insulation layer 102, denoted as T0; the outer surface of the insulation layer 102 is in direct contact with the atmospheric environment 103, and the thickness δ of the insulation layer 102 determines the amount of heat dissipated by the insulated object 101 to the atmospheric environment 103.

[0021] The main task of insulation layer calculation is to determine the thickness of the insulation material based on the pipeline data, the properties of the insulation material and the insulation requirements. After selecting the thickness of the insulation material, it is necessary to recalculate the actual heat dissipation loss and the outer surface temperature of the insulation layer.

[0022] At present, the commonly used insulation layer calculations are the maximum heat loss method and the external surface temperature method. The difference between the maximum heat loss method and the external surface temperature method lies in the different known conditions. The former knows the maximum allowable heat dissipation loss Q, and the latter knows the maximum allowable temperature T of the outer surface of the insulation layer. s If the maximum heat loss method is used to calculate the thickness of the insulation layer, it is necessary to assume in advance that the outer surface temperature of the insulation layer is T s However, this calculation method may lead to an unsolvable equation or a large deviation in the calculation result. In addition, the existing insulation layer calculation methods generally have problems such as numerous formulas, many unknown parameters, and repeated use of multiple equations to solve the same problem.

[0023] Based on this, the present invention provides a simplified planar insulation layer calculation method and device, which can alleviate the above-mentioned problems existing in the related art.

[0024] To facilitate understanding of this embodiment, a simplified planar thermal insulation layer calculation method disclosed in an embodiment of the present invention is first introduced in detail. Figure 2 As shown, the method may include the following steps:

[0025] Step S202, determining the surface temperature of the insulated object and the outer surface temperature of the insulation layer.

[0026] Step S204, determining the average temperature of the insulation layer based on the surface temperature of the insulated object and the outer surface temperature of the insulation layer.

[0027] Step S206, determining the thermal conductivity of the thermal insulation material of the thermal insulation layer corresponding to the average temperature of the thermal insulation layer.

[0028] Step S208, determining the thickness of the insulation layer based on the surface temperature of the insulated object, the outer surface temperature and thermal conductivity of the insulation layer, the predetermined ambient temperature, and the heat exchange coefficient between the insulation material of the insulation layer and the air.

[0029] The embodiment of the present invention provides a simplified planar insulation layer calculation method, which determines the surface temperature of the insulated object and the outer surface temperature of the insulation layer; determines the average temperature of the insulation layer based on the surface temperature of the insulated object and the outer surface temperature of the insulation layer; determines the thermal conductivity of the insulation material of the insulation layer corresponding to the average temperature of the insulation layer; and determines the thickness of the insulation layer based on the surface temperature of the insulated object, the outer surface temperature and thermal conductivity of the insulation layer, as well as the predetermined ambient temperature and the heat exchange coefficient between the insulation material of the insulation layer and the air. Using the above technology, the previous derivation of the maximum heat loss method is reasonably simplified so that it meets the solution conditions of the outer surface temperature method, thereby achieving accurate calculation of the insulation layer thickness without providing an assumed initial value, thereby improving the efficiency and accuracy of the insulation layer thickness calculation.

[0030] As a possible implementation, before the above step S202 (i.e. determining the surface temperature of the insulated object and the outer surface temperature of the insulation layer), it may also include: determining the ambient temperature and the heat exchange coefficient between the insulation material and the air. Based on this, the above step S202 may include:

[0031] Step 1: Determine the surface temperature of the object to be insulated.

[0032] Exemplarily, the surface temperature of the insulated object may be directly specified as a fixed value.

[0033] Step 2: Determine the outer surface temperature of the insulation layer based on the preset maximum heat loss, the ambient temperature, and the heat exchange coefficient between the insulation material and the air.

[0034] For example, the maximum heat loss Q and the ambient temperature T a and the heat exchange coefficient between insulation material and air α s , use the following formula to calculate the outer surface temperature of the insulation layer:

[0035]

[0036] Among them, T s is the outer surface temperature of the insulation layer, Q is the maximum heat loss, T a is the ambient temperature, α s is the heat exchange coefficient between insulation material and air.

[0037] As a possible implementation, the above step S204 (i.e. determining the average temperature of the insulation layer based on the surface temperature of the insulated object and the outer surface temperature of the insulation layer) may include:

[0038] Based on the surface temperature of the insulated object and the outer surface temperature of the insulation layer, the average temperature of the insulation layer is calculated using the following formula:

[0039]

[0040] Among them, T m is the average temperature of the insulation layer, T0 is the surface temperature of the insulated object, T s is the outer surface temperature of the insulation layer.

[0041] As a possible implementation, the above step S206 (i.e. determining the thermal conductivity of the thermal insulation material of the thermal insulation layer corresponding to the average temperature of the thermal insulation layer) may include:

[0042] Step A1, obtaining the thermal conductivity equation of the thermal insulation material.

[0043] Among them, the thermal conductivity equation can characterize the corresponding relationship between the average temperature of the insulation layer and the thermal conductivity.

[0044] Exemplarily, the thermal conductivity equation can be expressed as:

[0045] λ=f(T m )

[0046] Where λ is the thermal conductivity, f(T m ) is T m is a function of a variable, f(T m ) is determined by the properties of the thermal insulation material.

[0047] Step A2: Substituting the average temperature of the insulation layer into the obtained thermal conductivity equation to calculate the thermal conductivity.

[0048] Continuing from the previous example, when the average temperature of the insulation layer is known, m In the case of m Substituting into the thermal conductivity equation λ=f(T m ), thereby calculating the average temperature T of the insulation material of the insulation layer m The thermal conductivity λ at .

[0049] As a possible implementation, the above step S208 (i.e., determining the thickness of the insulation layer based on the surface temperature of the insulated object, the outer surface temperature and thermal conductivity of the insulation layer, and the predetermined ambient temperature and the heat exchange coefficient between the insulation material of the insulation layer and the air) may include:

[0050] Step a1, based on the surface temperature of the insulated object, the outer surface temperature and thermal conductivity of the insulation layer, the ambient temperature and the heat exchange coefficient between the insulation material and the air, the initial insulation layer thickness is calculated using the following formula:

[0051]

[0052] Among them, δ is the initial insulation layer thickness, T0 is the surface temperature of the insulated object, T s is the outer surface temperature of the insulation layer, λ is the thermal conductivity, T a is the ambient temperature, α s is the heat exchange coefficient between insulation material and air;

[0053] Step a2, rounding the initial insulation layer thickness based on a preset rounding rule to obtain the insulation layer thickness.

[0054] As a possible implementation, after the above step S208 (i.e., determining the thickness of the insulation layer based on the surface temperature of the insulated object, the outer surface temperature and thermal conductivity of the insulation layer, and the predetermined ambient temperature and the heat exchange coefficient between the insulation material and the air of the insulation layer), it may also include: calculating the actual heat dissipation loss and the actual outer surface temperature of the insulation layer based on the thickness of the insulation layer, the surface temperature of the insulated object, the thermal conductivity, the ambient temperature, and the heat exchange coefficient between the insulation material and the air. The specific operation method may be:

[0055] Step b1, determining the actual heat dissipation loss based on the thickness of the insulation layer, the surface temperature of the insulated object, the thermal conductivity, the ambient temperature and the heat exchange coefficient between the insulation material and the air.

[0056] For example, the thickness of the insulation layer, the surface temperature of the insulated object, the thermal conductivity, the ambient temperature, and the heat exchange coefficient between the insulation material and the air can be substituted into the following formula to calculate the actual heat dissipation loss:

[0057]

[0058] Where [δ] is the thickness of the insulation layer, T0 is the surface temperature of the insulated object, λ is the thermal conductivity, T a is the ambient temperature, α s is the heat exchange coefficient between insulation material and air, and [Q] is the actual heat dissipation loss.

[0059] Step b2, determining the actual outer surface temperature of the insulation layer based on the actual heat dissipation loss, ambient temperature and the heat exchange coefficient between the insulation material and the air.

[0060] Continuing with the previous example, the actual heat loss, ambient temperature, and heat exchange coefficient between insulation material and air can be substituted into the following formula to calculate the actual outer surface temperature of the insulation layer:

[0061]

[0062] Among them, [T s ] is the actual outer surface temperature of the insulation layer.

[0063] For ease of understanding, the formula used to calculate the planar insulation layer is described in detail from the perspective of formula derivation as follows.

[0064] The calculation formula of the average temperature of the insulation layer is:

[0065]

[0066] Thermal conductivity equation:

[0067] λ=f(T m )(Formula 2)

[0068] f(T m) is related to the type and performance of the thermal insulation material.

[0069] The formula for calculating the thickness of the insulation layer using the maximum heat loss method is:

[0070]

[0071] In fact, there is the following conversion relationship between Q and Ts:

[0072] Q=(T s -T a )×α s (Formula 4)

[0073] or

[0074]

[0075] Substituting (Equation 4) into (Equation 3) we get the surface temperature method calculation formula:

[0076]

[0077] The meanings of the letters in the above formula are shown in Table 1.

[0078] Table 1 Meaning and units of commonly used letters and symbols for thermal insulation calculation

[0079] letter meaning unit <![CDATA[T0]]> Surface temperature of the insulated object ℃ <![CDATA[T s ]]> Insulation layer outer surface temperature ℃ <![CDATA[T m ]]> Average temperature of insulation layer ℃ λ Thermal conductivity W / (m·K) Q Heat loss <![CDATA[W / m 2 ]]> <![CDATA[α s ]]> Heat transfer coefficient between insulation material and surrounding air <![CDATA[W(m 2 ·K)]]> <![CDATA[T a ]]> Ambient temperature ℃ δ Initial insulation thickness mm

[0080] The algorithm flow of the simplified planar insulation layer calculation method is as follows: Figure 3 As shown, the algorithm flow mainly includes: when T0 and Q are known, step S1 can be executed first, and then steps S2 to S6 can be executed. s In this case, steps S2 to S6 can be directly executed.

[0081] Step S1, calculate T according to (Formula 5) s .

[0082] At the preset ambient temperature T a and the heat transfer coefficient between the insulation material and the surrounding air α s In the case of a , α s , T0, Q into the formula Calculate T s .

[0083] Step S2, calculate T according to (Formula 1) m .

[0084] When T0 and T s In the case of s Substitute into the formula Calculate T m .

[0085] Step S3, calculating λ according to the thermal conductivity equation.

[0086] In the known T m In the case of m Substituting into the thermal conductivity equation λ=f(T m ) to calculate λ.

[0087] Step S4, calculate δ according to (Equation 6).

[0088] In the preset T a and α s And T0, T s In the case of λ, T a , α s , T0, T s , λ into the formula Calculate the initial insulation layer thickness δ.

[0089] Step S5, rounding δ according to a preset minimum rounding unit.

[0090] For example, δ is rounded off with 10 mm as the minimum rounding unit to obtain the insulation layer thickness [δ].

[0091] Step S6, using [δ] to calculate [T s ] and [Q].

[0092] In the preset T a and α s And T0, T s ,λ,[δ],T a , α s , T0, T s ,λ,[δ]Substitute into the formula Calculate the actual heat dissipation loss [Q].

[0093] In the preset T a and α s If [Q] is known, T a , α s , [Q] into the following formula Calculate the actual outer surface temperature of the insulation layer [T s ].

[0094] The simplified planar insulation calculation method converts the maximum heat loss method into the external surface temperature method, which is applicable to various scenarios where planar insulation calculations are performed using known conditions, and can be used for insulation design of flat wall materials such as flat roofs and boxes. In addition, the simplified planar insulation calculation method does not require cyclic iterations, and the thickness of the insulation layer can be directly derived from the known conditions, reducing the difficulty of calculation.

[0095] The technical solution of the simplified planar insulation layer calculation method is further described in detail below through embodiments and in combination with diagrams.

[0096] For example, if the outer surface temperature of a flat device is 550℃, aluminum silicate wool is selected as the insulation material. To ensure that the heat loss per square meter is no more than 251W, calculate the required insulation layer thickness.

[0097] This insulation layer thickness calculation embodiment belongs to the maximum heat loss method, and the specific steps for calculating the insulation layer thickness are as follows:

[0098] (1) In general, the ambient temperature T a The heat exchange coefficient between the insulation material and the air is α s 11.63W / (m 2 ·K).

[0099] (2) According to the formula The outer surface temperature T of the insulation layer is obtained s The initial value is 46.58℃.

[0100] (3) According to the formula The average temperature of the insulation layer T m It is 298.29℃.

[0101] (4) The thermal conductivity equation of aluminum silicate wool below 400°C is:

[0102] λ=0.044+0.0002*(T m -70)

[0103] T m Substituting into the thermal conductivity equation, the thermal conductivity λ is 0.089658 W / (m·K).

[0104] (5) According to the formula The initial insulation layer thickness δ is obtained to be 179.8 mm.

[0105] (6) The thickness of the insulation layer after rounding to 10 mm is 180 mm.

[0106] (7) According to the formula The actual heat dissipation loss [Q] is 250.763W / m2 .

[0107] (8) According to the formula Get the actual outer surface temperature of the insulation layer [T s ] is 46.5617℃.

[0108] For another example, given a planar device with an outer surface temperature of 400°C, aluminum silicate wool is selected as the insulation material. To ensure that the outer surface temperature of the insulation layer is no higher than 40°C, calculate the required insulation layer thickness.

[0109] This embodiment of calculating the thickness of the insulation layer belongs to the external surface temperature method. Compared with the embodiment of calculating the thickness of the insulation layer using the maximum heat loss method, the difference is that T in this embodiment s is known and does not need to be calculated. Except for the above step (2), the calculation methods of other steps are exactly the same. Only the calculation results are listed below:

[0110] Average temperature of insulation layer T m 220℃;

[0111] Insulation materials in T m The thermal conductivity λ is 0.074W / (m K);

[0112] The calculated initial insulation thickness δ is 152 mm;

[0113] The thickness of the insulation layer after rounding to 10 mm as the minimum unit is 160 mm;

[0114] The actual heat dissipation loss [Q] and the actual outer surface temperature of the insulation layer [T s ] are 210.519W / m 2 and 43.1013°C.

[0115] Finding out the changing rules of the outer surface temperature and thickness of the insulation layer will help to select a more economical thickness. Based on the above embodiment of calculating the thickness of the insulation layer using the outer surface temperature method, the outer surface temperature of the insulation layer is increased from 40°C to the scald-proof temperature of 60°C, and the thickness of the insulation layer is calculated every 5°C, and a chart for each calculation is given. s The temperatures were set at 40°C, 45°C, 50°C, 55°C, and 60°C respectively, and the thickness of each insulation layer was calculated. The results are shown in Table 2:

[0116] Table 2 Example of insulation layer outer surface temperature and insulation layer thickness

[0117] Ts / ℃ δ / m 40 0.152708512 45 0.113703783 50 0.090283749 55 0.074656062 60 0.063481145

[0118] Draw a scatter plot based on this, such as Figure 4 shown.

[0119] Based on the simplified planar insulation layer calculation method mentioned above, the insulation layer calculation software written in .NET language has a built-in common insulation material performance table as follows: Figure 5 As shown in the figure, the insulation layer calculation software interface is as follows Figure 6 As shown. Users can click Figure 6 Click the "Select Insulation Material" button in the interface shown to trigger the insulation calculation software to display Figure 5 The commonly used thermal insulation material performance table is shown. Users only need to double-click the specified row in the commonly used thermal insulation material performance table to select the thermal insulation material performance data, which can trigger the thermal insulation layer calculation software to set the thermal conductivity equation of the thermal insulation material selected by the user into the thermal insulation layer calculation software interface; users can also enter the ambient temperature, pipeline or equipment surface temperature, insulation layer (i.e. insulation layer) outer surface temperature, and the heat exchange coefficient between the thermal insulation material and the surrounding air on the thermal insulation layer calculation software interface; the thermal insulation layer calculation software interface also provides a selection box for the two calculation methods of maximum heat loss method and external surface temperature method (i.e. "maximum allowable heat loss method" option and "external surface temperature method" option) Option), the user can select the maximum heat loss method or the external surface temperature method as the calculation method for this insulation calculation on the insulation calculation software interface; the insulation calculation software interface also provides a selection box for two insulation processes, single-layer insulation and double-layer insulation (i.e., "single-layer" option and "double-layer" option), and the user can select single-layer insulation or double-layer insulation as the insulation process for this insulation calculation on the insulation calculation software interface; after setting the thermal conductivity equation, ambient temperature, pipeline or equipment surface temperature, insulation layer external surface temperature, insulation material and surrounding air heat exchange coefficient, insulation layer calculation method, insulation process, etc., the user can click Figure 6 Click the "Calculate" button in the interface shown to trigger the insulation layer calculation software to perform insulation layer calculation.

[0120] The beneficial effects of the simplified planar insulation layer calculation method mentioned above are mainly reflected in the following aspects:

[0121] 1) Various input methods: It can solve problems of maximum heat loss method and external surface temperature method.

[0122] 2) Accurate calculation results: The insulation layer calculation software has built-in basic data of dozens of commonly used insulation materials, providing a strong guarantee for the accuracy of the calculation.

[0123] 3) User-friendly interface: The software is written in .NET language and has complete functions for data input and result export.

[0124] 4) Wide range of applications: It can be used to calculate single-layer insulation and double-layer insulation planar insulation layers.

[0125] Based on the simplified planar thermal insulation layer calculation method, the present invention also provides a simplified planar thermal insulation layer calculation device, see Figure 7 As shown, the device may include the following modules:

[0126] The first determination module 702 is used to determine the surface temperature of the insulated object and the outer surface temperature of the insulation layer.

[0127] The second determination module 704 is used to determine the average temperature of the insulation layer based on the surface temperature of the insulated object and the outer surface temperature of the insulation layer.

[0128] The third determination module 706 is used to determine the thermal conductivity of the thermal insulation material of the thermal insulation layer corresponding to the average temperature of the thermal insulation layer.

[0129] The fourth determination module 708 is used to determine the thickness of the insulation layer based on the surface temperature of the insulated object, the outer surface temperature of the insulation layer and the thermal conductivity, as well as the predetermined ambient temperature and the heat exchange coefficient between the insulation material of the insulation layer and the air.

[0130] By using the simplified planar insulation layer calculation device mentioned above, the preliminary derivation of the maximum heat loss method is reasonably simplified so that it meets the solution conditions of the external surface temperature method, thereby realizing the accurate calculation of the insulation layer thickness without providing an assumed initial value, thereby improving the efficiency and accuracy of the insulation layer thickness calculation.

[0131] See also Figure 7 As shown, the device may also include:

[0132] The fifth determination module 710 is used to determine the ambient temperature and the heat exchange coefficient between the thermal insulation material and the air.

[0133] The first determination module 702 may also be used to: determine the surface temperature of the insulated object; and determine the outer surface temperature of the insulation layer based on a preset maximum heat loss, the ambient temperature, and the heat exchange coefficient between the insulation material and the air.

[0134] The first determining module 702 may also be used for:

[0135] Based on the preset maximum heat loss, the ambient temperature, and the heat exchange coefficient between the insulation material and the air, the outer surface temperature of the insulation layer is calculated using the following formula:

[0136]

[0137] Among them, T s is the outer surface temperature of the insulation layer, Q is the maximum heat loss, T a is the ambient temperature, α s is the heat exchange coefficient between insulation material and air.

[0138] The second determining module 704 may also be used for:

[0139] Based on the surface temperature of the insulated object and the outer surface temperature of the insulation layer, the average temperature of the insulation layer is calculated using the following formula:

[0140]

[0141] Among them, T m is the average temperature of the insulation layer, T0 is the surface temperature of the insulated object, T s is the outer surface temperature of the insulation layer.

[0142] The third determination module 706 can also be used to: obtain the thermal conductivity equation of the thermal insulation material; wherein the thermal conductivity equation represents the corresponding relationship between the average temperature of the thermal insulation layer and the thermal conductivity; substitute the average temperature of the thermal insulation layer into the obtained thermal conductivity equation to calculate the thermal conductivity.

[0143] The fourth determining module 708 may also be used for:

[0144] Based on the surface temperature of the insulated object, the outer surface temperature of the insulation layer and the thermal conductivity as well as the ambient temperature and the heat exchange coefficient between the insulation material and the air, the initial insulation layer thickness is calculated using the following formula:

[0145]

[0146] Among them, δ is the initial insulation layer thickness, T0 is the surface temperature of the insulated object, T s is the outer surface temperature of the insulation layer, λ is the thermal conductivity, T a is the ambient temperature, α s is the heat exchange coefficient between insulation material and air;

[0147] The initial insulation layer thickness is rounded off based on a preset rounding rule to obtain the insulation layer thickness.

[0148] See also Figure 7 As shown, the device may also include:

[0149] The sixth determination module 712 is used to calculate the actual heat dissipation loss and the actual outer surface temperature of the insulation layer based on the thickness of the insulation layer, the surface temperature of the insulated object, the thermal conductivity, the ambient temperature and the heat exchange coefficient between the insulation material and the air.

[0150] The sixth determination module 712 can also be used to: determine the actual heat dissipation loss based on the thickness of the insulation layer, the surface temperature of the insulated object, the thermal conductivity, the ambient temperature and the heat exchange coefficient between the insulation material and the air; determine the actual outer surface temperature of the insulation layer based on the actual heat dissipation loss, the ambient temperature and the heat exchange coefficient between the insulation material and the air.

[0151] The sixth determining module 712 may also be used for:

[0152] Substitute the thickness of the insulation layer, the surface temperature of the insulated object, the thermal conductivity, the ambient temperature and the heat exchange coefficient between the insulation material and air into the following formula to calculate the actual heat dissipation loss:

[0153]

[0154] Where [δ] is the thickness of the insulation layer, T0 is the surface temperature of the insulated object, λ is the thermal conductivity, T a is the ambient temperature, α s is the heat exchange coefficient between insulation material and air, and [Q] is the actual heat dissipation loss.

[0155] The sixth determining module 712 may also be used for:

[0156] Substitute the actual heat dissipation loss, the ambient temperature and the heat exchange coefficient between the insulation material and the air into the following formula to calculate the actual outer surface temperature of the insulation layer:

[0157]

[0158] Among them, [T s ] is the actual outer surface temperature of the insulation layer.

[0159] The simplified planar thermal insulation layer calculation device provided in the embodiment of the present invention has the same implementation principle and technical effects as those of the aforementioned simplified planar thermal insulation layer calculation method embodiment. For the sake of brief description, for matters not mentioned in the simplified planar thermal insulation layer calculation device embodiment, reference may be made to the corresponding contents in the aforementioned simplified planar thermal insulation layer calculation method embodiment.

[0160] Unless otherwise specifically stated, the relative steps, numerical expressions and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0161] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0162] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0163] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A simplified calculation method for a planar thermal insulation layer, characterized in that: include: Determine the surface temperature of the insulated object and the outer surface temperature of the insulation layer; Determine the average temperature of the insulation layer based on the surface temperature of the object to be insulated and the outer surface temperature of the insulation layer; Determining the thermal conductivity of the thermal insulation material of the thermal insulation layer corresponding to the average temperature of the thermal insulation layer; The thickness of the insulation layer is determined based on the surface temperature of the insulated object, the outer surface temperature of the insulation layer, the thermal conductivity, the predetermined ambient temperature, and the heat exchange coefficient between the insulation material of the insulation layer and the air.

2. The simplified planar insulation layer calculation method according to claim 1, characterized in that: Before determining the surface temperature of the insulated object and the outer surface temperature of the insulation layer, it also includes: Determining the ambient temperature and the heat exchange coefficient between the thermal insulation material and the air; Determine the surface temperature of the insulated object and the outer surface temperature of the insulation layer, including: Determining the surface temperature of the object to be insulated; The outer surface temperature of the insulation layer is determined based on a preset maximum heat loss, the ambient temperature, and the heat exchange coefficient between the insulation material and the air.

3. The simplified planar insulation layer calculation method according to claim 2, characterized in that: Determining the outer surface temperature of the insulation layer based on a preset maximum heat loss, the ambient temperature, and the heat exchange coefficient between the insulation material and the air includes: Based on the preset maximum heat loss, the ambient temperature, and the heat exchange coefficient between the insulation material and the air, the outer surface temperature of the insulation layer is calculated using the following formula: Among them, T s is the outer surface temperature of the insulation layer, Q is the maximum heat loss, T a is the ambient temperature, α s is the heat exchange coefficient between insulation material and air.

4. The simplified planar insulation layer calculation method according to claim 1, characterized in that: Determining the average temperature of the insulation layer based on the surface temperature of the insulation object and the outer surface temperature of the insulation layer includes: Based on the surface temperature of the insulated object and the outer surface temperature of the insulation layer, the average temperature of the insulation layer is calculated using the following formula: Among them, T m is the average temperature of the insulation layer, T0 is the surface temperature of the insulated object, T s is the outer surface temperature of the insulation layer.

5. The simplified planar insulation layer calculation method according to claim 1, characterized in that: Determining the thermal conductivity of the thermal insulation material of the thermal insulation layer corresponding to the average temperature of the thermal insulation layer includes: Obtaining a thermal conductivity equation of the thermal insulation material; wherein the thermal conductivity equation represents the corresponding relationship between the average temperature of the thermal insulation layer and the thermal conductivity; Substitute the average temperature of the insulation layer into the obtained thermal conductivity equation to calculate the thermal conductivity.

6. The simplified planar insulation layer calculation method according to claim 1, characterized in that: Determining the thickness of the insulation layer based on the surface temperature of the insulated object, the outer surface temperature of the insulation layer, the thermal conductivity, a predetermined ambient temperature, and a heat exchange coefficient between the insulation material of the insulation layer and air includes: Based on the surface temperature of the insulated object, the outer surface temperature of the insulation layer and the thermal conductivity as well as the ambient temperature and the heat exchange coefficient between the insulation material and the air, the initial insulation layer thickness is calculated using the following formula: Among them, δ is the initial insulation layer thickness, T0 is the surface temperature of the insulated object, T s is the outer surface temperature of the insulation layer, λ is the thermal conductivity, T a is the ambient temperature, α s is the heat exchange coefficient between insulation material and air; The initial insulation layer thickness is rounded off based on a preset rounding rule to obtain the insulation layer thickness.

7. The simplified planar insulation layer calculation method according to claim 1, characterized in that: After determining the thickness of the insulation layer based on the surface temperature of the insulated object, the outer surface temperature of the insulation layer, the thermal conductivity, the predetermined ambient temperature, and the heat exchange coefficient between the insulation material of the insulation layer and air, the method further includes: The actual heat dissipation loss and the actual outer surface temperature of the insulation layer are calculated based on the thickness of the insulation layer, the surface temperature of the insulated object, the thermal conductivity, the ambient temperature and the heat exchange coefficient between the insulation material and the air.

8. The simplified planar insulation layer calculation method according to claim 7, characterized in that: The actual heat dissipation loss and the actual outer surface temperature of the insulation layer are calculated based on the thickness of the insulation layer, the surface temperature of the insulated object, the thermal conductivity, the ambient temperature, and the heat exchange coefficient between the insulation material and the air, including: Determine the actual heat dissipation loss based on the thickness of the insulation layer, the surface temperature of the insulated object, the thermal conductivity, the ambient temperature and the heat exchange coefficient between the insulation material and air; The actual outer surface temperature of the thermal insulation layer is determined based on the actual heat dissipation loss, the ambient temperature and the heat exchange coefficient between the thermal insulation material and the air.

9. The simplified planar insulation layer calculation method according to claim 8, characterized in that: The actual heat dissipation loss is determined based on the thickness of the insulation layer, the surface temperature of the insulated object, the thermal conductivity, the ambient temperature, and the heat exchange coefficient between the insulation material and air, including: Substitute the thickness of the insulation layer, the surface temperature of the insulated object, the thermal conductivity, the ambient temperature and the heat exchange coefficient between the insulation material and air into the following formula to calculate the actual heat dissipation loss: Where [δ] is the thickness of the insulation layer, T0 is the surface temperature of the insulated object, λ is the thermal conductivity, T a is the ambient temperature, α s is the heat exchange coefficient between the insulation material and the air, [Q] is the actual heat dissipation loss; Determining the actual outer surface temperature of the insulation layer based on the actual heat dissipation loss, the ambient temperature, and the heat exchange coefficient between the insulation material and the air includes: Substitute the actual heat dissipation loss, the ambient temperature and the heat exchange coefficient between the insulation material and the air into the following formula to calculate the actual outer surface temperature of the insulation layer: Among them, [T s ] is the actual outer surface temperature of the insulation layer.

10. A simplified planar thermal insulation layer calculation device, characterized in that: include: The first determination module is used to determine the surface temperature of the insulated object and the outer surface temperature of the insulation layer; A second determination module is used to determine the average temperature of the insulation layer based on the surface temperature of the insulation object and the outer surface temperature of the insulation layer; A third determination module is used to determine the thermal conductivity of the thermal insulation material of the thermal insulation layer corresponding to the average temperature of the thermal insulation layer; The fourth determination module is used to determine the thickness of the insulation layer based on the surface temperature of the insulated object, the outer surface temperature of the insulation layer and the thermal conductivity, as well as the predetermined ambient temperature and the heat exchange coefficient between the insulation material of the insulation layer and the air.

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