A method for reducing power consumption of a radiation source

Abstract

The application provides a method for reducing power consumption of a radiation source, which comprises the following steps: (1) placing a phase change material in a heat preservation cavity, arranging a resistance wire around the phase change material, arranging a first temperature sensor on the upper and lower surfaces of the phase change material, and obtaining a phase change material layer; (2) placing a radiation source material on the phase change material layer, and placing a second temperature sensor on the upper surface of the radiation source material, and obtaining a radiation source material layer; (3) heating the phase change material layer by using the resistance wire, stopping heating when the first temperature sensor reaches a first preset temperature, and obtaining a phase change material layer with latent heat energy storage function; and (4) heating the radiation source material layer by using the phase change material layer with latent heat energy storage function until the temperature of the second temperature sensor reaches a required temperature. Compared with the existing radiation source energy supply mode, the method has smaller power consumption.

Description

Technical Field

[0001] This invention relates to the field of radiation source technology, and in particular to a method for reducing the power consumption of radiation sources. Background Technology

[0002] A radiation source is a substance or device that can emit infrared radiation, and is usually used for heating, cooling and calibrating instruments and equipment.

[0003] In existing technologies, to ensure that radiation sources meet the operating conditions required for engineering applications, electrical energy is often used to directly or indirectly heat the radiation source to reach the desired temperature. However, in certain special environments (such as the wild, Gobi Desert, or sea surface), obtaining electrical energy is extremely inconvenient, making it impossible to power the radiation source. Furthermore, continuous heating of the radiation source is required, resulting in high power consumption and failing to meet energy-saving requirements. Therefore, there is a need to provide a method that can reduce the power consumption of radiation sources. Summary of the Invention

[0004] This invention provides a method for reducing the power consumption of a radiation source. This method enables the normal operation of the radiation source even when electricity is inconvenient to obtain, and it requires less power consumption compared to existing radiation source power supply methods.

[0005] In a first aspect, the present invention provides a method for reducing the power consumption of a radiation source, the method comprising:

[0006] (1) The phase change material is placed in the heat preservation cavity, and resistance wires are set around the phase change material. A first temperature sensor is set on the upper and lower surfaces of the phase change material to obtain a phase change material layer.

[0007] (2) Place the radiation source material on the phase change material layer and place a second temperature sensor on the upper surface of the radiation source material to obtain the radiation source material layer;

[0008] (3) The phase change material layer is heated by the resistance wire. After the first temperature sensor reaches the first preset temperature, the heating is stopped to obtain a phase change material layer with latent heat storage function.

[0009] (4) The phase change material layer with latent heat storage function is used to heat the radiation source material layer until the temperature of the second temperature sensor reaches the required temperature.

[0010] Preferably, the resistance wire is wound around the phase change material layer, and there is a gap between the resistance wire and the radiation source material layer.

[0011] Preferably, the thickness of the radiation source material layer is 1 to 2 mm.

[0012] Preferably, the insulation cavity is at least one of glass fiber, asbestos, rock wool, silicate or aerogel felt.

[0013] Preferably, the number of the first temperature sensors is 2 to 4, and the number of the second temperature sensors is 1 to 2.

[0014] Preferably, the phase change material is one of solid-solid phase change, solid-liquid phase change, solid-gas phase change, or liquid-gas phase change materials.

[0015] Preferably, the first preset temperature is the temperature at which the phase change material undergoes a phase change.

[0016] Preferably, the upper surface of the radiation source material layer is provided with a movable heat-insulating cover.

[0017] In a second aspect, the present invention also provides the application of a radiation source obtained by the method described in any one of the first aspects above in heating, cooling and calibration instruments.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] In this invention, the latent heat storage properties of phase change materials are utilized to store thermal energy, allowing the phase change materials to release thermal energy at specific times and in specific situations, thereby heating the radiation source material and bringing it to the required temperature. This method in the present invention can solve the problems of high power consumption of radiation sources in the prior art and the inability to guarantee the normal application of radiation sources in extreme environments due to power constraints. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a flowchart of a method for reducing the power consumption of a radiation source provided by an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure in which the radiation source material layer and the phase change material layer are disposed in the heat preservation cavity in a method for reducing the power consumption of a radiation source according to an embodiment of the present invention.

[0023] In the diagram: 100 - Insulation cavity; 200 - Radiation source material layer; 300 - Phase change material layer; 400 - Resistance wire; 501 - First temperature sensor; 502 - Second temperature sensor; 600 - Insulation cover. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0025] like Figure 1 and Figure 2 As shown, the present invention provides a method for reducing the power consumption of a radiation source, the method comprising:

[0026] (1) The phase change material is placed in the heat preservation cavity 100, and resistance wires 400 are set around the phase change material. First temperature sensors 501 are set on the upper and lower surfaces of the phase change material to obtain a phase change material layer 300.

[0027] (2) Place the radiation source material on the phase change material layer 300, and place the second temperature sensor 502 on the upper surface of the radiation source material to obtain the radiation source material layer 200.

[0028] (3) The phase change material layer 300 is heated by the resistance wire 400. After the first temperature sensor 501 reaches the first preset temperature, the heating is stopped to obtain a phase change material layer with latent heat storage function.

[0029] (4) The phase change material layer with latent heat storage function is used to heat the radiation source material layer 200 until the temperature of the second temperature sensor 502 reaches the required temperature.

[0030] In this invention, a phase change material (PCM) is first placed inside an insulated cavity, and resistance wires are arranged around the PCM. These resistance wires can be connected to a small generator or a UPS power supply. When the PCM needs energy storage, the generator or UPS connected to the resistance wires can be activated. The resistance wires, when energized, convert electrical energy into heat energy. By arranging the resistance wires around the PCM, the resistance wires can uniformly heat the PCM. A first temperature sensor on the upper and lower surfaces of the PCM layer and a second temperature sensor on the surface of the radiation source material layer are connected to a data acquisition card and a PC. By observing the first temperature sensor, when the temperature in the first temperature sensor reaches the core of the PCM layer... When the phase change material reaches the phase change temperature, the heating is stopped, resulting in a phase change material layer with latent heat storage function. When a radiation source is needed for engineering applications, the radiation source material layer and the phase change material layer can be tightly bonded together. The radiation source is heated by the phase change material with sufficient energy storage. The tight bonding between the radiation source material and the phase change material reduces heat loss and ensures that the radiation source material is heated uniformly. When the radiation source material layer completely absorbs the heat released by the phase change material layer, the temperatures of the radiation source material layer and the phase change material layer reach thermal equilibrium. The temperature of the second temperature sensor on the surface of the radiation source reaches the temperature required for the engineering, and the radiation source can then be used for cooling, heating, or calibrating instruments and equipment.

[0031] This invention utilizes the latent heat storage properties of phase change materials to store thermal energy, enabling the phase change materials to release thermal energy at specific times and in specific situations, thereby heating the radiation source material and bringing it to the required temperature. The method in this invention can solve the problems of high power consumption of radiation sources in the prior art and the inability to guarantee the normal application of radiation sources in extreme environments due to power constraints.

[0032] According to some preferred embodiments, the resistance wire 400 is wound around the phase change material layer 300, and there is a gap between the resistance wire 400 and the radiation source material layer 200.

[0033] In this invention, resistance wires are arranged around the perimeter of the phase change material layer. These resistance wires can be wound around the perimeter of the phase change material layer, or they can be wound and placed around the perimeter of the insulation cavity corresponding to the placement position of the phase change material. This invention does not impose any particular limitation on the winding interval of the resistance wires; it can be set according to the actual application process. For example, when the required temperature in actual operating conditions is high, the heat required to heat the phase change material is large, so the resistance wires can be tightly wound around the perimeter of the phase change material. When the required temperature in actual operating conditions is low, the heat required by the phase change material is small, so resistance wires with a certain interval can be arranged around the perimeter of the phase change material. Furthermore, in this invention, the resistance wires are arranged around the perimeter of the phase change material layer and do not come into contact with the radiation source material layer, thus preventing the radiation source material layer from being heated and its temperature increased through the resistance wires.

[0034] According to some preferred embodiments, the thickness of the radiation source material layer 200 is 1 to 2 mm (for example, it can be 1 mm, 1.2 mm, 1.5 mm, 1.8 mm or 2 mm).

[0035] In this invention, by controlling the thickness of the radiation source material layer within a certain range, it is more advantageous to ensure that the radiation source meets the actual application requirements with lower power consumption. If the thickness of the radiation source material layer is higher than the above range, the heat transfer time from the phase change material layer to the radiation source material layer will be too long. Conversely, if the thickness of the radiation source material layer is lower than the above range, the heat dissipation of the radiation source material layer will be too fast, which is not conducive to practical applications. Furthermore, the thickness of the phase change material layer in this invention mainly depends on the energy storage required in the actual engineering project. It can generally be determined using the following formula based on the required temperature of the radiation source material layer, the thickness of the radiation source material, engineering requirements, and relevant parameters of the phase change material (such as phase change temperature, latent heat of phase change, specific heat capacity, etc.):

[0036]

[0037]

[0038] In the formula, t is the heating time (s); d P C represents the thickness (m) of the phase change material. P1 and C P2 ρ represents the specific heat capacity (J / (kg·K)) of the phase change material in phase 1 and phase 2, respectively; H and L represent the specific enthalpy and latent heat (J / kg) of the phase change material, respectively; ρ represents the specific heat capacity (J / (kg·K)) of the phase change material in phase 1 and phase 2 ... r and ρ P The densities (kg / m³) of the radiation source material and the phase change material are respectively. 3 );k r h is the thermal conductivity of the radiation source material (W / (m·K)); a air convection heat transfer coefficient (W / (m)) 2 ·K); A r d r The upper surface area (m²) of the radiation source material are respectively 2 ) and thickness (m); ε r σ is the surface emissivity of the radiation source material; σ is the Stefan-Boltz diffuse constant; T P T a T r These represent the temperatures (K) of the phase change material, the environment, and the radiation source, respectively; T min and T max These are the starting and ending temperatures (K) of the phase transition, respectively.

[0039] According to some preferred embodiments, the insulation cavity 100 is at least one of glass fiber, asbestos, rock wool, silicate or aerogel felt.

[0040] The thermal insulation cavity in this invention is made of thermal insulation material, such as glass fiber, asbestos, rock wool, silicate or aerogel felt. By placing the phase change material layer and the radiation source material layer inside the thermal insulation cavity, heat exchange between the phase change material layer and the radiation source material layer and the surrounding environment can be avoided, thereby reducing heat loss and making it more energy-efficient.

[0041] According to some preferred embodiments, the number of the first temperature sensors 501 is 2 to 4 (for example, 2, 3 or 4), and the number of the second temperature sensors 502 is 1 to 2 (for example, 1 or 2).

[0042] In this invention, by placing a first temperature sensor on the upper and lower surfaces of the phase change material layer, it is possible to observe whether the temperatures of the upper and lower surfaces of the phase change material layer are consistent, thereby ensuring the temperature uniformity of the phase change material layer. The side of the phase change material layer that contacts the bottom of the insulation shell is the lower surface, and the side of the phase change material layer that contacts the radiation source material layer is the upper surface. Since the radiation source material layer absorbs the heat released by the phase change material layer through thermal conduction, it is only necessary to place a second temperature sensor on the upper surface of the radiation source material layer to observe whether the required temperature has been reached through the temperature of the second temperature sensor.

[0043] According to some preferred embodiments, the phase change material is one of solid-solid phase change, solid-liquid phase change, solid-gas phase change, or liquid-gas phase change materials.

[0044] It should be noted that there are no particular restrictions on the specific type of phase change material in this invention. The material can be selected based on the application requirements of the project. For example, when the required temperature is 40–50°C, the phase change material should also have a phase change temperature of 40–50°C, such as an organic phase change wax. In this invention, the radiation source material has a high thermal conductivity and an emissivity approximately similar to that of a blackbody, with a surface emissivity approximately 1. For example, it can be a metal steel plate coated with a high-emissivity paint (approximately the emissivity of a blackbody). During application, one side of the radiation source material layer can be tightly bonded to one side of the phase change material layer to ensure uniform and complete heating of the radiation source material layer.

[0045] Phase change materials (PCMs) must possess latent heat storage properties to meet engineering application requirements. Based on the material's thermophysical parameters (thermal conductivity, latent heat of phase change, density, specific heat capacity, and phase change temperature), a suitable material is selected as the heat source to supply radiation. Specifically, thermal conductivity represents the heat transfer capacity of the PCM; latent heat of phase change represents the heat released or absorbed by the PCM during the phase change process; specific heat capacity is the heat capacity of the PCM, i.e., the heat absorbed or released per unit temperature change; and phase change temperature is the temperature at which the substance undergoes a phase transition.

[0046] According to some preferred embodiments, the first preset temperature is the temperature at which the phase change material undergoes a phase change.

[0047] In this invention, phase change materials are used to absorb or release a large amount of latent heat during phase transition processes (solid-gas, solid-liquid, solid-solid, or liquid-gas), thereby achieving the storage and release of heat. The phase change material with sufficient energy storage can directly heat the radiation source without electricity, which not only reduces the power consumption of the radiation source, but also avoids the problem of difficulty in using electricity.

[0048] According to some preferred embodiments, the upper surface of the radiation source material layer 200 is provided with a movable heat-insulating cover 600. It should be noted that in this invention, when not in use, the radiation source material layer and the phase change material layer are not bonded together, and the heat-insulating cover on the upper surface of the radiation source material layer is movable. This allows for tight bonding of the radiation source material layer and the phase change material layer through the heat-insulating cover when the radiation source is actually used, thereby enabling heating of the radiation source without power, and subsequently utilizing it for cooling, heating, or calibrating instruments and equipment.

[0049] As can be seen from the following formula, the method in this invention consumes less electrical power compared to the traditional method;

[0050]

[0051]

[0052]

[0053] In the formula, Q1 and Q2 represent the total energy consumption (J) of the conventional method and the method used in this invention, respectively; I1, I2 and R1, R2 represent the current (A) and resistance (Ω) of the two power sources, respectively; t is the heating time (s); C Pr The specific heat capacity of the radiation source material (J / (kg·K)), C P1 and C P2 ρ represents the specific heat capacity (J / (kg·K)) of the phase change material in phase 1 and phase 2, respectively; H and L represent the specific enthalpy and latent heat (J / kg) of the phase change material, respectively; ρ represents the specific heat capacity (J / (kg·K)) of the phase change material in phase 1 and phase 2 ... rand ρ P The densities (kg / m³) of the radiation source material and the phase change material are respectively. 3 );V r and V P The volumes (m³) of the radiation source material and the phase change material are respectively. 3 );k r h is the thermal conductivity of the radiation source material (W / (m·K)); a air convection heat transfer coefficient (W / (m)) 2 ·K); A r d r The upper surface area (m²) of the radiation source material are respectively 2 ) and thickness (m); ε r σ is the surface emissivity of the radiation source material; σ is the Stefan-Boltz diffuse constant; T P T a T r These represent the temperatures (K) of the phase change material, the environment, and the radiation source, respectively; T min and T max These are the starting and ending temperatures (K) of the phase transition, respectively.

[0054] As can be seen from the above formulas, compared with conventional blackbody furnaces, this invention uses a smaller power supply to heat the phase change material, utilizes the latent heat storage characteristics of the phase change material to convert electrical energy into heat energy for storage, and releases heat until the radiation source material reaches the required temperature; moreover, this invention uses insulation material to keep the system warm, reducing heat exchange (heat convection and heat radiation) between the radiation source material and the phase change material and the environment, that is, reducing the heat loss of the system, thereby saving the system heating time and achieving the effect of energy saving.

[0055] Figure 2 This is a structural diagram of the device used in the method for reducing the power consumption of the radiation source in this invention. As can be seen from the diagram, the device includes a heat-insulating cavity 100. Inside the heat-insulating cavity 100, a radiation source material layer 200 and a phase change material layer 300 are arranged sequentially from top to bottom. Resistance wires 400 are arranged around the phase change material layer 300. The phase change material layer 300 is used for latent heat energy storage, the resistance wires 400 are used to assist the latent heat energy storage of the phase change material layer 300, and the radiation source material layer 200 is used to absorb the energy of the phase change material layer 300 and radiate it. The insulation cavity 100 is also equipped with a temperature sensor, which is used to monitor the temperature of the phase change material layer 300 and the radiation source material layer 200. The temperature sensor includes a first temperature sensor 501 and a second temperature sensor 502. The first temperature sensor 501 is located on the upper and lower surfaces of the phase change material layer 300. The second temperature sensor 502 is located on the upper surface of the radiation source material layer 200. The upper surface of the radiation source material layer is also equipped with a movable insulation cover 600, which is connected to the insulation shell 100.

[0056] The device used in this invention is simple, small in size, flexible in design, and easy to use. Furthermore, during the phase change thermal storage process, the temperature of the phase change material itself remains essentially constant or nearly constant, which is beneficial for controlling the temperature of the storage system. Using a phase change material with latent heat storage properties to directly heat the radiation source instead of a high-power power supply can reduce the power consumption of the radiation source, meeting energy-saving requirements.

[0057] The present invention also provides an application of the radiation source obtained by the method described in any of the above aspects in heating, cooling and calibration instruments.

[0058] To more clearly illustrate the technical solution and advantages of the present invention, the following describes in detail a method for reducing the power consumption of a radiation source through several embodiments.

[0059] Example 1:

[0060] (1) The phase change material is placed in the heat-insulating cavity (glass fiber), and resistance wire is tightly wound around the phase change material. Two first temperature sensors are set on the upper and lower surfaces of the phase change material to obtain a phase change material layer. The phase change material is a phase change wax. The thickness of the phase change material layer is 300 mm.

[0061] (2) Place the radiation source material on the phase change material layer and place two second temperature sensors on the upper surface of the radiation source material to obtain the radiation source material layer; wherein, the radiation source material is a steel plate coated with blackbody furnace radiation coating and the thickness of the radiation source material layer is 2mm.

[0062] (3) The phase change material layer is heated by resistance wire. After the first temperature sensor reaches the phase change temperature (50°C) of the phase change material, the heating is stopped to obtain a phase change material layer with latent heat storage function.

[0063] (4) The radiation source material is tightly bonded to the phase change material layer with latent heat storage function, and the radiation source material layer is heated until the temperature of the second temperature sensor reaches the required temperature of 50°C. Then the radiation source can be used in engineering applications.

[0064] In this embodiment, the electrical power required to heat the radiation source is 300W.

[0065] Comparative Example 1:

[0066] Compared with the blackbody furnace radiation source commonly used in existing technology, the heating power of this comparative example is 1000W.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method of reducing power consumption of a radiation source, characterized by, The method comprises: (1) placing a phase change material in a heat preservation cavity, arranging an electric resistance wire around the phase change material, arranging a first temperature sensor on the upper and lower surfaces of the phase change material, and obtaining a phase change material layer; the electric resistance wire is wound around the phase change material layer, and the electric resistance wire is spaced apart from a radiation source material layer; The thickness of the phase change material layer is determined by calculation using the following formula: where t is the heating time (s); d P is the thickness of the phase change material (m); C P1 and C P2 are the specific heat capacities of the phase change material in phase 1 and phase 2, respectively (J / (kg·K)); H, L are the specific enthalpy and latent heat of the phase change material, respectively (J / kg); p r and p P are the densities of the radiation source material and the phase change material, respectively (kg / m 3 ); k r is the thermal conductivity of the radiation source material (W / (m·K)); h a is the air convection heat transfer coefficient (W / (m 2 ·K); A r , d r are the upper surface area (m 2 ) and thickness (m) of the radiation source material, respectively; ε r is the surface emissivity of the radiation source material; σ is the Stefan-Boltzmann constant; T P , T a , T r are the temperatures of the phase change material, the environment, and the radiation source, respectively (K); T min and T max are the starting and ending temperatures of the phase change, respectively (K). (2) placing a radiation source material on the phase change material layer, and placing a second temperature sensor on the upper surface of the radiation source material, and obtaining a radiation source material layer; (3) heating the phase change material layer by using the electric resistance wire, stopping heating when the first temperature sensor reaches a first preset temperature, and obtaining a phase change material layer with latent heat energy storage function; (4) heating the radiation source material layer by using the phase change material layer with latent heat energy storage function until the temperature of the second temperature sensor reaches a required temperature; the heated radiation source material layer is applied to a calibration instrument.

2. The method of claim 1, wherein, The thickness of the radiation source material layer is 1-2 mm.

3. The method of claim 1, wherein, The material of the heat preservation cavity is at least one of glass fiber, asbestos, rock wool, silicate or aerogel felt.

4. The method of claim 1, wherein, The number of the first temperature sensor is 2-4, and the number of the second temperature sensor is 1-2.

5. The method of claim 1, wherein, The phase change material is one of solid-solid phase change material, solid-liquid phase change material, solid-gas phase change material or liquid-gas phase change material.

6. The method of claim 1, wherein, The first preset temperature is the temperature at which the phase change material changes phase.

7. The method of claim 1, wherein, The upper surface of the radiation source material layer is provided with a movable heat preservation cover connected with the heat preservation cavity.

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