一种机载系统多通道相变蓄热单元的制造方法

Abstract

This invention relates to the field of thermal energy storage technology, and more specifically, to a method for manufacturing a multi-channel phase change thermal energy storage unit for an airborne system. The method includes obtaining the heat load flow rate of the airborne system; when the heat load flow rate is greater than a flow rate threshold, calculating a first volume ratio between the cold fluid channel and the phase change thermal energy storage channel; and when the difference between the first volume ratio and 1 is greater than or equal to a proportionality threshold, manufacturing a thermal energy storage unit with a first configuration. This solves the problem of sudden temperature changes in phase change thermal energy storage units.

Description

Technical Field

[0001] This invention relates to the field of thermal energy storage technology, and more specifically, to a method for manufacturing a multi-channel phase change thermal energy storage unit for an airborne system. Background Technology

[0002] Airborne high-power instantaneous equipment needs to dissipate a large amount of heat in a short period of time during operation, followed by an intermittent state. Traditional heat dissipation solutions without heat storage, such as air cooling or liquid cooling, become too costly with increasing heat dissipation power and are not suitable for use under discontinuous operating conditions. Therefore, they are not suitable for this airborne system's operating environment. Phase change heat storage units can absorb instantaneous high heat flux and slowly release heat during the intermittent period, making them suitable for intermittent heat dissipation conditions where the heat load requires short-term heat dissipation, long-term interruption, high peak-to-average power ratio, and large duty cycle.

[0003] Current phase change thermal storage units adopt a single-channel (dual-channel) structure, in which the hot fluid in the melting stage and the cold fluid in the solidification stage share a single channel. This causes the hot and cold fluids to mix when switching between the melting and solidification stages, which in turn leads to sudden temperature changes. Summary of the Invention

[0004] To address the problem of sudden temperature changes in phase change thermal storage units, this invention provides a method for manufacturing a multi-channel phase change thermal storage unit for airborne systems, comprising:

[0005] Obtain the thermal load flow rate of the airborne system;

[0006] When the heat load flow rate is greater than the flow rate threshold, calculate the first volume ratio of the cold fluid channel and the phase change heat storage channel;

[0007] When the difference between the first volume ratio and 1 is greater than or equal to the proportional threshold, a heat storage unit of the first configuration is manufactured.

[0008] The heat storage unit includes multiple hot fluid channels, multiple cold fluid channels, and multiple phase change heat storage channels; the flow directions of the hot fluid channels and the cold fluid channels are parallel; any two of the flow directions, the first direction, and the second direction of the hot fluid channels are perpendicular to each other.

[0009] In the heat storage unit of the first configuration, the cross-sectional length of the hot fluid channel extends along the first direction, and multiple hot fluid channels are arranged in a spaced array along the second direction. A first space separates two adjacent hot fluid channels. Each hot fluid channel has the first space on both sides. The cold fluid channel and the phase change heat storage channel are distributed in the first space, and the volume ratio of the cold fluid channel and the phase change heat storage channel satisfies the first volume ratio.

[0010] In some embodiments, the method for manufacturing the airborne system multi-channel phase change thermal storage unit further includes:

[0011] When the difference between the first volume ratio and 1 is less than the ratio threshold, the intermittent duration of the airborne system stopping heat generation is obtained;

[0012] The heat storage unit is manufactured according to the intermittent duration; wherein the arrangement interval between adjacent cold fluid channels and phase change heat storage channels in the heat storage unit is positively correlated with the intermittent duration.

[0013] In some embodiments, manufacturing the heat storage unit according to the interval duration includes:

[0014] When the interval duration is less than the first interval threshold, the heat storage unit of the second configuration is manufactured;

[0015] In the heat storage unit of the second configuration, the hot fluid channels are arranged in close proximity along the second direction; the hot fluid channels are arranged at intervals along the first direction, and there is a second space between two adjacent hot fluid channels arranged along the first direction, and the cold fluid channel and the phase change heat storage channel are alternately arranged in each second space.

[0016] In some embodiments, manufacturing the heat storage unit according to the interval duration further includes:

[0017] When the interval duration is greater than the first interval threshold and less than the second interval threshold, the heat storage unit of the third configuration is manufactured;

[0018] In the heat storage unit of the third configuration, multiple hot fluid channels are arranged at intervals along the first direction and the second direction, multiple cold fluid channels are arranged at intervals along the first direction and the second direction, and multiple phase change heat storage channels are arranged at intervals along the first direction and the second direction. Adjacent phase change heat storage channels and cold fluid channels are separated by hot fluid channels.

[0019] In some embodiments, manufacturing the heat storage unit according to the interval duration further includes:

[0020] When the interval duration is greater than or equal to the second interval threshold, the heat storage unit of the fourth configuration is manufactured;

[0021] In the heat storage unit of the fourth configuration, the cross-sectional lengths of the hot fluid channel, the cold fluid channel, and the phase change heat storage channel all extend along the first direction; the cold fluid channel and the phase change heat storage channel are alternately arranged along the second direction; a third space separates adjacent cold fluid channels and phase change heat storage channels; and the hot fluid channels are distributed in the third space.

[0022] In some embodiments, calculating the first volume ratio of the cold fluid channel and the phase change heat storage channel when the heat load flow rate is greater than a flow rate threshold includes:

[0023] When the heat load flow rate is greater than the flow threshold, the first volume ratio of the cold fluid channel and the phase change heat storage channel is calculated according to the following formula:

[0024] V P / V H =(W P / W H ) / (w P / w H ) / (ρ P / ρ H );

[0025] Among them, W P The heat absorption power of the phase change heat storage channel; w P V is the heat absorption power density of the phase change heat storage channel; P ρ is the volume of the phase change heat storage channel; P The density of the phase change heat storage channel; W H The heat absorption power of the cold fluid channel; w H V is the heat absorption power density of the cold fluid channel; H ρ is the volume of the cold fluid channel; H The density of the cold fluid channel.

[0026] In some embodiments, the method for manufacturing the airborne system multi-channel phase change thermal storage unit further includes:

[0027] When the heat load flow rate is less than the flow rate threshold, the peak-to-average power ratio of the heat generation power of the airborne system is obtained;

[0028] When the difference between the peak-to-average power ratio and 1 is less than a first proportional threshold, the heat storage unit of the fifth or sixth configuration is manufactured.

[0029] In the heat storage unit of the fifth configuration, the cross-sectional lengths of the hot fluid channel, the cold fluid channel and the phase change heat storage channel all extend along the first direction, and multiple cold fluid channels are distributed at intervals along the second direction. There is a fourth space between adjacent cold fluid channels, and the hot fluid channel and the phase change heat storage channel are alternately distributed in the fourth space along the second direction.

[0030] In the heat storage unit of the sixth configuration, multiple hot fluid channels are arranged at intervals along the first direction and the second direction, multiple cold fluid channels are arranged at intervals along the first direction and the second direction, and multiple phase change heat storage channels are arranged at intervals along the first direction and the second direction. Each adjacent hot fluid channel and phase change heat storage channel is separated by a cold fluid channel.

[0031] In some embodiments, the method for manufacturing the airborne system multi-channel phase change thermal storage unit further includes:

[0032] When the difference between the peak-to-average power ratio and 1 is greater than the first proportional threshold and less than the second proportional threshold, the heat storage unit of the seventh or eighth configuration is manufactured.

[0033] In the heat storage unit of the seventh configuration, the cross-sectional length of the cold fluid channel extends along the first direction, and multiple cold fluid channels are arranged in a spaced array along the second direction. A fifth space separates two adjacent cold fluid channels. The hot fluid channel and the phase change heat storage channel are distributed in the fifth space, and the volume of the hot fluid channel is larger than the volume of the phase change heat storage channel.

[0034] In the heat storage unit of the eighth configuration, multiple hot fluid channels are arranged at intervals along the first direction and the second direction, with cold fluid channels spaced apart between adjacent hot fluid channels arranged along the first direction, and phase change heat storage channels spaced apart between adjacent hot fluid channels arranged along the second direction.

[0035] In some embodiments, the method for manufacturing the airborne system multi-channel phase change thermal storage unit further includes:

[0036] When the difference between the peak-to-average power ratio and 1 is greater than the third proportional threshold and less than the fourth proportional threshold, the heat storage unit of the ninth or tenth configuration is manufactured; the third proportional threshold is greater than the second proportional threshold.

[0037] In the heat storage unit of the ninth configuration, the cross-sectional length of the phase change heat storage channel extends along the first direction, and multiple phase change heat storage channels are arranged in a spaced array along the second direction. A sixth space separates two adjacent phase change heat storage channels. The hot fluid channel and the cold fluid channel are distributed in the sixth space, and the volume of the hot fluid channel is larger than the volume of the cold fluid channel.

[0038] In the heat storage unit of the tenth configuration, multiple phase change heat storage channels are arrayed along the first direction and the second direction, respectively. The phase change heat storage channels arranged along the second direction are sequentially close to each other. There is a seventh space between adjacent phase change heat storage channels arranged along the first direction. In each seventh space, the cold fluid channel and the hot fluid channel are alternately arranged along the second direction.

[0039] In some embodiments, the method for manufacturing the airborne system multi-channel phase change thermal storage unit further includes:

[0040] When the difference between the peak-to-average power ratio and 1 is greater than the fourth proportional threshold, the heat storage unit of the eleventh or twelfth configuration is manufactured.

[0041] In the eleventh configuration of the heat storage unit, the cross-sectional length of the phase change heat storage channel extends along the first direction, and multiple phase change heat storage channels are arranged at intervals along the second direction. There is an eighth space between adjacent phase change heat storage channels, and the hot fluid channel and the cold fluid channel are alternately arranged in each eighth space.

[0042] In the heat storage unit of the twelfth configuration, multiple hot fluid channels are arranged at intervals along the first direction and the second direction, multiple cold fluid channels are arranged at intervals along the first direction and the second direction, and multiple phase change heat storage channels are arranged at intervals along the first direction and the second direction. Each adjacent hot fluid channel and cold fluid channel is separated by one phase change heat storage channel.

[0043] To address the problem of sudden temperature changes in phase change thermal storage units, this invention offers the following advantages:

[0044] By acquiring the heat load flow rate of the airborne system, when the heat load flow rate is greater than the flow rate threshold, the first volume ratio of the cold fluid channel and the phase change heat storage channel is calculated. If the difference between the first volume ratio and 1 is greater than or equal to the ratio threshold, a heat storage unit of the first configuration is manufactured. This realizes the independent setting of the cold fluid channel and the hot fluid channel and the targeted matching of the phase change heat storage channel, thereby absorbing the instantaneous high-power heat load, alleviating the thermal shock caused by the instantaneous peak high heat flux density, and ensuring the stable power absorption of heat by the cold fluid. This avoids the temperature change problem caused by the mixing of cold and hot fluids during the melting and solidification stages, and meets the stable heat dissipation requirements during the operation of airborne equipment. Attached Figure Description

[0045] Figure 1 A flowchart illustrating a method for manufacturing a multi-channel phase change thermal energy storage unit for an airborne system according to one embodiment is shown;

[0046] Figure 2 A schematic diagram of the first configuration of the thermal storage unit is shown;

[0047] Figure 3 A schematic diagram of the second configuration of the thermal storage unit is shown;

[0048] Figure 4 A schematic diagram of the third configuration of the thermal storage unit is shown;

[0049] Figure 5 A schematic diagram of the fourth configuration of the thermal storage unit is shown;

[0050] Figure 6 A schematic diagram of the fifth configuration thermal storage unit is shown;

[0051] Figure 7 A schematic diagram of the sixth configuration thermal storage unit is shown;

[0052] Figure 8 A schematic diagram of the seventh configuration thermal storage unit is shown;

[0053] Figure 9 A schematic diagram of the eighth configuration thermal storage unit is shown;

[0054] Figure 10 A schematic diagram of the ninth configuration thermal storage unit is shown;

[0055] Figure 11 A schematic diagram of the tenth configuration thermal storage unit is shown;

[0056] Figure 12 A schematic diagram of the eleventh configuration thermal storage unit is shown;

[0057] Figure 13 A schematic diagram of the twelfth configuration thermal storage unit is shown.

[0058] Figure labels: Phase change heat storage channel 1; Hot fluid channel 2; Cold fluid channel 3. Detailed Implementation

[0059] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0060] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0061] Airborne high-power instantaneous equipment needs to dissipate a large amount of heat in a short period of time during operation, followed by an intermittent state. Traditional heat dissipation solutions without heat storage, such as air cooling or liquid cooling, become too costly with increased heat dissipation power and are not suitable for intermittent operation conditions. Therefore, they are not suitable for this airborne system's operating environment. Phase change thermal storage units can absorb instantaneous high heat flux and slowly release heat during the intermittent period, making them suitable for intermittent heat dissipation conditions requiring short-term heat dissipation, long-term pauses, high peak-to-average power ratio, and large duty cycle. Current phase change thermal storage units adopt a single-channel (dual-channel) structure, where the hot fluid in the melting stage and the cold fluid in the solidification stage share a single channel. This leads to mixing of the hot and cold fluids when switching between the melting and solidification stages, resulting in sudden temperature changes.

[0062] In this embodiment, to solve the above problems, this application provides a method for manufacturing a multi-channel phase change heat storage unit for an airborne system, such as... Figure 1 As shown, a method for manufacturing a multi-channel phase change heat storage unit for an airborne system includes steps S10 to S30. The manufacturing method of the multi-channel phase change heat storage unit for an airborne system sequentially executes steps S10, S20, and S30. Steps S10 to S30 will be described in detail below:

[0063] Step S10: Obtain the heat load flow of the airborne system, accurately grasp the heat dissipation requirements of the airborne system, and lay the foundation for the subsequent manufacturing of heat storage units.

[0064] Step S20: When the heat load flow rate is greater than the flow rate threshold, calculate the first volume ratio of the cold fluid channel 3 and the phase change heat storage channel 1 to provide core data support for the subsequent fabrication of the heat storage unit.

[0065] Step S30: When the difference between the first volume ratio and 1 is greater than or equal to the proportional threshold, a heat storage unit of the first configuration is manufactured. Through the above steps, the system's heat dissipation requirements can be matched. Combined with the reasonable arrangement of multiple channels in the heat storage unit, heat exchange uniformity is ensured, thereby eliminating instantaneous high-power heat loads, mitigating the thermal shock caused by instantaneous peak high heat flux density, and meeting the heat dissipation requirements of airborne equipment during operation. It is worth noting that the volume of the hot fluid channel 2 is equal to the sum of the volumes of the cold fluid channel 3 and the phase change heat storage channel 1.

[0066] The heat storage unit includes multiple hot fluid channels 2, multiple cold fluid channels 3, and multiple phase change heat storage channels 1. The flow directions of the hot fluid channels 2 and the cold fluid channels 3 are parallel. Any two of the flow directions of the hot fluid channels 2, the first direction, and the second direction are perpendicular to each other.

[0067] like Figure 2As shown, in the heat storage unit of the first configuration, the cross-sectional length of the hot fluid channel 2 extends along the first direction. In other embodiments, multiple hot fluid channels 2 are modularly spliced ​​together along the first direction. Multiple hot fluid channels 2 are arranged in a spaced array along the second direction, increasing the contact area between the hot fluid and the cold fluid and the phase change heat storage channel 1, respectively. A first space separates two adjacent hot fluid channels 2, and each hot fluid channel 2 has a first space on both sides. The cold fluid channel 3 and the phase change heat storage channel 1 are distributed in the first space, ensuring comprehensive heat exchange. The volume ratio of the cold fluid channel 3 and the phase change heat storage channel 1 satisfies the first volume ratio, ensuring that the heat exchange capacity of the cold fluid channel 3 and the phase change heat storage channel 1 precisely matches the current thermal load requirements of the airborne system. This application, through the first configuration, enables rapid transfer and absorption of heat from the hot fluid. Specifically, the phase change heat storage channel 1 can effectively absorb instantaneous excess heat, and the cold fluid channel 3 can absorb heat with stable power. The synergistic effect of the two further enhances the thermal shock mitigation effect, ensuring the stability of the airborne system under high loads. This avoids the problem of hot fluid in the melting stage and cold fluid in the solidification stage sharing a single channel, which could lead to mixing and sudden temperature changes when switching between the melting and solidification stages. Therefore, the phase change heat storage unit of the first configuration combines the stable heat dissipation function of the cold fluid channel 3 with the function of the phase change heat storage channel 1 in absorbing instantaneous high heat loads, thus forming a peak-shaving and valley-filling effect.

[0068] While current multi-channel structures on the market solve the problem of sudden temperature changes, their layout is relatively simplified, lacking a scientifically sound method to adapt the phase change heat storage unit to the different heat dissipation requirements of airborne equipment. Therefore, how to design a system to suit the specific heat dissipation needs of airborne equipment remains a significant industry challenge. The manufacturing method of the multi-channel phase change heat storage unit for airborne systems proposed in this invention provides an efficient and scientifically sound solution, enabling adaptive design based on the different heat dissipation requirements of airborne equipment, thus solving this industry problem.

[0069] Furthermore, the manufacturing method of the airborne system multi-channel phase change heat storage unit also includes step S40, which includes steps S41 and S42. The manufacturing method of the airborne system multi-channel phase change heat storage unit executes steps S10, S20, S30, or S40 sequentially. Steps S41 and S42 will be described in detail below:

[0070] Step S41: When the difference between the first volume ratio and 1 is less than the proportional threshold, it indicates that the basic heat exchange capacity of the cold fluid channel 3 and the phase change heat storage channel 1 is relatively balanced. At this time, the intermittent duration of the airborne system stopping heat generation is obtained to further adapt to the dynamic operation characteristics of the airborne system.

[0071] Step S42: Manufacture the heat storage unit according to the intermittent duration. The spacing between adjacent cold fluid channels 3 and phase change heat storage channels 1 within the heat storage unit is positively correlated with the intermittent duration. When there are heat generation interruptions in the airborne system, the heat storage unit can utilize the intermittent period to complete heat storage reset through the phase change heat storage channel 1 or optimize heat dissipation through the cold fluid channel 3. Adjusting the spacing according to the intermittent duration ensures that the heat storage unit can quickly return to its optimal heat exchange state, thereby more flexibly meeting the changing operating conditions of the airborne system and ensuring the continuous satisfaction of heat dissipation requirements.

[0072] Further, step S42 includes step S421, in which the manufacturing method of the airborne system multi-channel phase change heat storage unit sequentially executes steps S10, S20, S41, and S421. Steps S30 and S40 are parallel; if the execution condition of step S30 is not met, then step S40 is executed. Step S421 will be described in detail below:

[0073] Step S421: When the interval duration is less than the first interval threshold, i.e. the interval duration is short, manufacture the heat storage unit of the second configuration.

[0074] Among them, such as Figure 3 As shown, in the second configuration of the heat storage unit, the hot fluid channels 2 are arranged sequentially and closely along the second direction, and the hot fluid channels 2 are arranged at intervals along the first direction. A second space exists between two adjacent hot fluid channels 2 arranged along the first direction. Each second space contains alternating cold fluid channels 3 and phase change heat storage channels 1. The second configuration of the heat storage unit ensures uniform and efficient heat transfer. Even with limited downtime in the airborne system, the cold fluid channels 3 can simultaneously cool and restore the hot fluid channels 2 and the phase change heat storage channels 1, accelerating the solidification of the phase change heat storage channels 1. This ensures rapid heat exchange and short-term heat storage regulation, guaranteeing that the airborne system can immediately cope with thermal loads and maintain stable heat dissipation upon restart.

[0075] Further, step S42 includes step S422, in which the manufacturing method of the airborne system multi-channel phase change thermal storage unit is performed sequentially through steps S10, S20, S41, and S422. Step S422 will be described in detail below:

[0076] Step S422: When the interval duration is greater than the first interval threshold and less than the second interval threshold, manufacture the heat storage unit of the third configuration.

[0077] Among them, such as Figure 4As shown, in the third configuration of the heat storage unit, multiple hot fluid channels 2 are arranged at intervals along the first and second directions, multiple cold fluid channels 3 are arranged at intervals along the first and second directions, and multiple phase change heat storage channels 1 are arranged at intervals along the first and second directions. Adjacent phase change heat storage channels 1 and cold fluid channels 3 are separated by hot fluid channels 2. In this way, the phase change heat storage channels 1 can fully complete the heat storage and release cycle during medium-duration intervals, while the cold fluid channels 3 simultaneously regulate heat dissipation. The two channels, through the intermittent action of the hot fluid channels 2, can synergistically improve the heat exchange effect, thereby adapting to the system's heat dissipation requirements under medium-duration intervals and ensuring the stability of thermal management.

[0078] Further, step S42 includes step S423, in which the manufacturing method of the airborne system multi-channel phase change heat storage unit is executed sequentially through steps S10, S20, S41, and S423. Step S423 will be described in detail below: Step S423: When the interval duration is greater than or equal to the second interval threshold, the heat storage unit of the fourth configuration is manufactured.

[0079] Among them, such as Figure 5 As shown, in the fourth configuration of the heat storage unit, the cross-sectional lengths of the hot fluid channel 2, the cold fluid channel 3, and the phase change heat storage channel 1 all extend along the first direction. The cold fluid channel 3 and the phase change heat storage channel 1 are alternately arranged along the second direction; a third space separates adjacent cold fluid channels 3 and phase change heat storage channels 1, and the hot fluid channels 2 are distributed in the third space.

[0080] When the intermittent operation is long, the recovery time of phase change heat storage channel 1 is longer, ensuring that phase change heat storage channel 1 can fully solidify without needing to break it up, thus reducing the manufacturing cost of the heat storage unit. The distribution of hot fluid channel 2 in the third space ensures that the heat generated by the system is transferred to cold fluid channel 3 and phase change heat storage channel 1 in a timely manner, enabling the heat storage unit to maintain good thermal regulation capability after long intermittent operation and meet the heat dissipation requirements of the airborne system when it resumes operation.

[0081] Furthermore, step S20 includes step S21, which is a further optimization of step S20. The manufacturing method of the airborne system multi-channel phase change heat storage unit is performed sequentially through steps S10, S21, and S30. Step S21 will be described in detail below:

[0082] Step S21: When the heat load flow rate is greater than the flow rate threshold, calculate the first volume ratio of the cold fluid channel 3 and the phase change heat storage channel 1 according to the following formula.

[0083] V P / V H =(W P / W H ) / (wP / w H ) / (ρ P / ρ H );

[0084] Among them, W P The heat absorption power of phase change heat storage channel 1; w P V represents the heat absorption power density of phase change heat storage channel 1; P ρ is the volume of phase change heat storage channel 1; P The density of phase change heat storage channel 1; W H The heat absorption power of the cold fluid channel 3; w H V represents the heat absorption power density of the cold fluid channel 3. H ρ is the volume of cold fluid channel 3; H The density of the cold fluid channel 3 is given by this formula. When the heat load flow rate exceeds the threshold, the first volume ratio is calculated using this formula. This formula comprehensively considers key parameters such as the heat absorption power, power density, and density of the phase change heat storage channel 1 and the cold fluid channel 3, establishing a quantitative relationship between the volume ratio and each performance parameter. The first volume ratio calculated by this formula has a clear theoretical basis and can accurately reflect the required volume configuration ratio of the phase change heat storage channel 1 and the cold fluid channel 3 under the current heat load. This provides scientific data support for the design of the heat storage unit configuration, thereby ensuring that the heat exchange capacity of the heat storage unit is highly matched with the system heat load requirements, and improving the accuracy and reliability of thermal management.

[0085] Furthermore, the manufacturing method of the airborne system multi-channel phase change heat storage unit also includes steps S22 and S23. The manufacturing method of the airborne system multi-channel phase change heat storage unit executes steps S10, S22, and S23 sequentially. Steps S22 and S23 will be described in detail below:

[0086] Step S22: When the heat load flow rate is less than the flow rate threshold, obtain the peak-to-average power ratio of the airborne system's heat generation power.

[0087] Step S23: When the difference between the peak-to-average power ratio (PAPR) and 1 is less than the first proportional threshold, manufacture the fifth or sixth configuration of the heat storage unit. When the heat load flow rate is relatively stable, the PAPR of the heat generation power can reflect the heat load fluctuation. When the difference between the PAPR and 1 is small, it indicates that the fluctuation is gentle. At this time, the fifth or sixth configuration of the heat storage unit manufactured is specifically adapted to this working condition.

[0088] Among them, such as Figure 6As shown, in the fifth configuration of the heat storage unit, the cross-sectional lengths of the hot fluid channel 2, cold fluid channel 3, and phase change heat storage channel 1 all extend along the first direction. Multiple cold fluid channels 3 are spaced apart along the second direction, with a fourth space between adjacent cold fluid channels 3. The hot fluid channel 2 and phase change heat storage channel 1 are alternately distributed in the fourth space along the second direction. This fifth configuration ensures full contact between the hot fluid channel 2 and the cold fluid channel 3. Heat is primarily carried away by the cold fluid channel 3 through stable power, while the phase change heat storage channel 1 is used to avoid instantaneous heat loads and ensure the safety of the heat storage unit.

[0089] like Figure 7 As shown, in the sixth configuration of the heat storage unit, multiple hot fluid channels 2 are arranged at intervals along the first and second directions, multiple cold fluid channels 3 are arranged at intervals along the first and second directions, and multiple phase change heat storage channels 1 are arranged at intervals along the first and second directions. Adjacent hot fluid channels 2 and phase change heat storage channels 1 are separated by cold fluid channels 3. In the sixth configuration, the phase change heat storage channel 1 and the hot fluid channel 2 have a small area of ​​contact, further avoiding instantaneous heat loads and enabling timely absorption of heat from the hot fluid channel 2 through the phase change heat storage channel 1. Through these two configuration designs, stable heat exchange can be achieved with a simple and efficient channel layout under low flow and low fluctuation conditions. The phase change heat storage channel 1 and the cold fluid channel 3 work together to ensure stable heat dissipation of the airborne system, meeting heat dissipation requirements. Simultaneously, the phase change heat storage channel 1 can absorb heat from the cold fluid, further ensuring stable heat dissipation of the airborne system.

[0090] Furthermore, the manufacturing method of the multi-channel phase change heat storage unit for airborne systems also includes step S24. Steps S23 and S24 are parallel; if the execution condition of step S23 is not met, then step S24 is executed. The manufacturing method of the multi-channel phase change heat storage unit for airborne systems executes steps S10, S22, and S24 sequentially. Step S24 will be described in detail below:

[0091] Step S24: When the difference between the peak-to-average power ratio (PAPR) and 1 is greater than the first proportional threshold and less than the second proportional threshold, manufacture a seventh or eighth configuration heat storage unit. When the PAPR is within a moderate fluctuation range, the seventh or eighth configuration heat storage unit adapts to this requirement through differentiated channel design. The seventh or eighth configuration heat storage unit can be selected according to actual needs. In the seventh configuration, the proportion of phase change heat storage channel 1 is 20%, while in the eighth configuration heat storage unit, the proportion of phase change heat storage channel 1 is 25%. Preferably, when the PAPR is large, the eighth configuration heat storage unit can be used; when it is small, the seventh configuration heat storage unit can be used.

[0092] Among them, such as Figure 8As shown, in the seventh configuration of the heat storage unit, the cross-sectional length of the cold fluid channel 3 extends along the first direction, and multiple cold fluid channels 3 are arranged in a spaced array along the second direction. A fifth space separates two adjacent cold fluid channels 3. The hot fluid channel 2 and the phase change heat storage channel 1 are distributed in the fifth space, with the volume of the hot fluid channel 2 being larger than that of the phase change heat storage channel 1. The hot fluid channel 2 has a larger volume in the fifth space. The smaller phase change heat storage channel 1 contacts the hot fluid channel 2, improving the main heat exchange capacity while assisting in the adjustment of the phase change heat storage channel 1, thereby ensuring the stability of the heat storage unit's operation.

[0093] like Figure 9 As shown, in the eighth configuration of the heat storage unit, multiple hot fluid channels 2 are arranged at intervals along the first and second directions. Adjacent hot fluid channels 2 arranged along the first direction are separated by cold fluid channels 3, and adjacent hot fluid channels 2 arranged along the second direction are separated by phase change heat storage channels 1. The larger volume of the phase change heat storage channels 1 allows for a balance between instantaneous heat exchange and heat storage regulation under moderate heat load fluctuations. The dominant role of the hot fluid channels 2 ensures rapid heat transfer, while the phase change heat storage channels 1 smooth out heat fluctuations caused by these fluctuations, thereby maintaining the thermal stability of the system.

[0094] Furthermore, the manufacturing method of the multi-channel phase change thermal storage unit for airborne systems also includes step S25. Steps S23, S24, and S25 are parallel; if the execution condition of step S23 is not met, then step S24 or step S25 is executed. The manufacturing method of the multi-channel phase change thermal storage unit for airborne systems executes steps S10, S22, and S25 sequentially. Step S25 will be described in detail below: Step S25: When the difference between the peak-to-average power ratio and 1 is greater than the third proportional threshold and less than the fourth proportional threshold, a thermal storage unit of the ninth or tenth configuration is manufactured. The third proportional threshold is greater than the second proportional threshold. When the peak-to-average power ratio of the heat generation is in a large fluctuation range, the ninth or tenth configuration thermal storage unit strengthens the role of the phase change thermal storage channel 1 to cope with the fluctuation.

[0095] Among them, such as Figure 10 As shown, in the ninth configuration of the heat storage unit, the cross-sectional length of the phase change heat storage channel 1 extends along the first direction. Multiple phase change heat storage channels 1 are arranged in an array along the second direction, and a sixth space separates two adjacent phase change heat storage channels 1. Hot fluid channels 2 and cold fluid channels 3 are distributed in the sixth space, with the volume of the hot fluid channel 2 being larger than that of the cold fluid channel 3. In the ninth configuration, the phase change heat storage channels 1 are arrayed, and the volume of the hot fluid channel 2 is dominant in the sixth space, ensuring heat transfer while also smoothing out fluctuations through the heat storage channels.

[0096] like Figure 11As shown, in the tenth configuration of the heat storage unit, multiple phase change heat storage channels 1 are arrayed along the first and second directions respectively. The phase change heat storage channels 1 arranged along the second direction are arranged in close proximity. There is a seventh space between adjacent phase change heat storage channels 1 arranged along the first direction. In each seventh space, cold fluid channels 3 and hot fluid channels 2 are alternately arranged along the second direction. In the tenth configuration, the phase change heat storage channels 1 are arrayed in both directions and partially arranged in close proximity. In the seventh space, the hot fluid channels 2 dominate the heat exchange and cooperate with the cold fluid channels 3 for regulation.

[0097] With this design, the phase change heat storage channel 1 can fully absorb and release heat to cope with large heat load fluctuations, the volume advantage of the hot fluid channel 2 ensures the core heat exchange requirements, and the cold fluid channel 3 assists in regulation, thereby ensuring that the system can still dissipate heat stably when the heat load fluctuates greatly.

[0098] Furthermore, the manufacturing method of the multi-channel phase change heat storage unit for airborne systems also includes step S26. Steps S23, S24, S25, and S26 are parallel; if the execution condition of step S23 is not met, then step S24, S25, or S26 is executed. The manufacturing method of the multi-channel phase change heat storage unit for airborne systems executes steps S10, S22, and S26 sequentially. Step S26 will be described in detail below: Step S26: When the difference between the peak-to-average power ratio and 1 is greater than the fourth proportional threshold, an eleventh or twelfth configuration heat storage unit is manufactured. When the peak-to-average power ratio is in a very large fluctuation range, the eleventh or twelfth configuration heat storage unit is designed with phase change heat storage channel 1 as the core. The eleventh or twelfth configuration heat storage unit can be selected according to actual needs. Preferably, when the peak-to-average power ratio is large, the twelfth configuration heat storage unit can be used; when it is small, the eleventh configuration heat storage unit can be used.

[0099] Among them, such as Figure 12 As shown, in the eleventh configuration of the heat storage unit, the cross-sectional length of the phase change heat storage channel 1 extends along the first direction, and multiple phase change heat storage channels 1 are arranged at intervals along the second direction. An eighth space exists between adjacent phase change heat storage channels 1, and each eighth space alternately contains hot fluid channels 2 and cold fluid channels 3. Due to the large peak-to-average ratio, the contact area between the phase change heat storage channel 1 and the hot fluid channel 2 is increased, while the cold fluid channel 3 only serves an auxiliary role in heat exchange. Simultaneously, the cold fluid channel 3 can accelerate the solidification recovery of the phase change heat storage channel 1, ensuring that the phase change heat storage channel 1 can quickly return to its optimal heat exchange state. Figure 13As shown, in the heat storage unit of the twelfth configuration, multiple hot fluid channels 2 are arranged at intervals along the first direction and the second direction, multiple cold fluid channels 3 are arranged at intervals along the first direction and the second direction, and multiple phase change heat storage channels 1 are arranged at intervals along the first direction and the second direction. There is a phase change heat storage channel 1 between each adjacent hot fluid channel 2 and cold fluid channel 3.

[0100] Phase change heat storage channel 1 can maximize the heat buffering effect to cope with extreme heat load fluctuations, hot fluid channel 2 ensures efficient heat transfer, and cold fluid channel 3 assists in heat dissipation. The three work together to enable the heat storage unit to meet the heat dissipation requirements of the airborne system under extreme fluctuation conditions, ensuring stable operation of the equipment.

[0101] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the scope of this disclosure.

Claims

1. A method for manufacturing a multi-channel phase change thermal storage unit for an airborne system, characterized in that, The manufacturing method of the airborne system multi-channel phase change heat storage unit includes: Obtain the thermal load flow rate of the airborne system; When the heat load flow rate is greater than the flow rate threshold, calculate the first volume ratio of the cold fluid channel and the phase change heat storage channel; When the difference between the first volume ratio and 1 is greater than or equal to the proportional threshold, a heat storage unit of the first configuration is manufactured. The heat storage unit includes multiple hot fluid channels, multiple cold fluid channels, and multiple phase change heat storage channels; the flow directions of the hot fluid channels and the cold fluid channels are parallel; any two of the flow directions, the first direction, and the second direction of the hot fluid channels are perpendicular to each other. In the heat storage unit of the first configuration, the cross-sectional length of the hot fluid channel extends along the first direction, and multiple hot fluid channels are arranged in a spaced array along the second direction. A first space separates two adjacent hot fluid channels. Each hot fluid channel has the first space on both sides. The cold fluid channel and the phase change heat storage channel are distributed in the first space. The volume ratio of the cold fluid channel and the phase change heat storage channel satisfies the first volume ratio. When the difference between the first volume ratio and 1 is less than the ratio threshold, the intermittent duration of the airborne system stopping heat generation is obtained; The heat storage unit is manufactured according to the intermittent duration; wherein the arrangement interval between adjacent cold fluid channels and phase change heat storage channels in the heat storage unit is positively correlated with the intermittent duration; When the heat load flow rate is less than the flow rate threshold, the peak-to-average power ratio of the heat generation power of the airborne system is obtained; When the difference between the peak-to-average power ratio and 1 is less than a first proportional threshold, the heat storage unit of the fifth or sixth configuration is manufactured. In the heat storage unit of the fifth configuration, the cross-sectional lengths of the hot fluid channel, the cold fluid channel and the phase change heat storage channel all extend along the first direction, and multiple cold fluid channels are distributed at intervals along the second direction. There is a fourth space between adjacent cold fluid channels, and the hot fluid channel and the phase change heat storage channel are alternately distributed in the fourth space along the second direction. In the heat storage unit of the sixth configuration, multiple hot fluid channels are arranged at intervals along the first direction and the second direction, multiple cold fluid channels are arranged at intervals along the first direction and the second direction, and multiple phase change heat storage channels are arranged at intervals along the first direction and the second direction. Each adjacent hot fluid channel and phase change heat storage channel is separated by a cold fluid channel. When the heat load flow rate is greater than the flow rate threshold, the calculation of the first volume ratio of the cold fluid channel and the phase change heat storage channel includes: When the heat load flow rate is greater than the flow threshold, the first volume ratio of the cold fluid channel and the phase change heat storage channel is calculated according to the following formula: V P / V H =(W P / IN H ) / (In P / In H ) / (ρ P / ρ H ); Among them, W P The heat absorption power of the phase change heat storage channel; w P V is the heat absorption power density of the phase change heat storage channel; P ρ is the volume of the phase change heat storage channel; P The density of the phase change heat storage channel; W H The heat absorption power of the cold fluid channel; w H V is the heat absorption power density of the cold fluid channel; H ρ is the volume of the cold fluid channel; H The density of the cold fluid channel.

2. The manufacturing method of a multi-channel phase change thermal storage unit for an airborne system according to claim 1, characterized in that, Manufacturing the heat storage unit according to the intermittent duration includes: When the interval duration is less than the first interval threshold, the heat storage unit of the second configuration is manufactured; In the heat storage unit of the second configuration, the hot fluid channels are arranged in close proximity along the second direction; the hot fluid channels are arranged at intervals along the first direction, and there is a second space between two adjacent hot fluid channels arranged along the first direction, and the cold fluid channel and the phase change heat storage channel are alternately arranged in each second space.

3. The manufacturing method of a multi-channel phase change thermal storage unit for an airborne system according to claim 2, characterized in that, The process of manufacturing the heat storage unit according to the intermittent duration further includes: When the interval duration is greater than the first interval threshold and less than the second interval threshold, the heat storage unit of the third configuration is manufactured; In the heat storage unit of the third configuration, multiple hot fluid channels are arranged at intervals along the first direction and the second direction, multiple cold fluid channels are arranged at intervals along the first direction and the second direction, and multiple phase change heat storage channels are arranged at intervals along the first direction and the second direction. Adjacent phase change heat storage channels and cold fluid channels are separated by hot fluid channels.

4. The manufacturing method of a multi-channel phase change thermal storage unit for an airborne system according to claim 3, characterized in that, The process of manufacturing the heat storage unit according to the intermittent duration further includes: When the interval duration is greater than or equal to the second interval threshold, the heat storage unit of the fourth configuration is manufactured; In the heat storage unit of the fourth configuration, the cross-sectional lengths of the hot fluid channel, the cold fluid channel, and the phase change heat storage channel all extend along the first direction; the cold fluid channel and the phase change heat storage channel are alternately arranged along the second direction; a third space separates adjacent cold fluid channels and phase change heat storage channels; and the hot fluid channels are distributed in the third space.

5. The manufacturing method of a multi-channel phase change thermal storage unit for an airborne system according to claim 1, characterized in that, The manufacturing method of the airborne system multi-channel phase change heat storage unit also includes: When the difference between the peak-to-average power ratio and 1 is greater than the first proportional threshold and less than the second proportional threshold, the heat storage unit of the seventh or eighth configuration is manufactured. In the heat storage unit of the seventh configuration, the cross-sectional length of the cold fluid channel extends along the first direction, and multiple cold fluid channels are arranged in a spaced array along the second direction. A fifth space separates two adjacent cold fluid channels. The hot fluid channel and the phase change heat storage channel are distributed in the fifth space, and the volume of the hot fluid channel is larger than the volume of the phase change heat storage channel. In the heat storage unit of the eighth configuration, multiple hot fluid channels are arranged at intervals along the first direction and the second direction, with cold fluid channels spaced apart between adjacent hot fluid channels arranged along the first direction, and phase change heat storage channels spaced apart between adjacent hot fluid channels arranged along the second direction.

6. A method for manufacturing a multi-channel phase change thermal storage unit for an airborne system according to claim 5, characterized in that, The manufacturing method of the airborne system multi-channel phase change heat storage unit also includes: When the difference between the peak-to-average power ratio and 1 is greater than the third proportional threshold and less than the fourth proportional threshold, the heat storage unit of the ninth or tenth configuration is manufactured; the third proportional threshold is greater than the second proportional threshold. In the heat storage unit of the ninth configuration, the cross-sectional length of the phase change heat storage channel extends along the first direction, and multiple phase change heat storage channels are arranged in a spaced array along the second direction. A sixth space separates two adjacent phase change heat storage channels. The hot fluid channel and the cold fluid channel are distributed in the sixth space, and the volume of the hot fluid channel is larger than the volume of the cold fluid channel. In the heat storage unit of the tenth configuration, multiple phase change heat storage channels are arrayed along the first direction and the second direction, respectively. The phase change heat storage channels arranged along the second direction are sequentially close to each other. There is a seventh space between adjacent phase change heat storage channels arranged along the first direction. In each seventh space, the cold fluid channel and the hot fluid channel are alternately arranged along the second direction.

7. A method for manufacturing a multi-channel phase change thermal storage unit for an airborne system according to claim 6, characterized in that, The manufacturing method of the airborne system multi-channel phase change heat storage unit also includes: When the difference between the peak-to-average power ratio and 1 is greater than the fourth proportional threshold, the heat storage unit of the eleventh or twelfth configuration is manufactured. In the eleventh configuration of the heat storage unit, the cross-sectional length of the phase change heat storage channel extends along the first direction, and multiple phase change heat storage channels are arranged at intervals along the second direction. There is an eighth space between adjacent phase change heat storage channels, and the hot fluid channel and the cold fluid channel are alternately arranged in each eighth space. In the heat storage unit of the twelfth configuration, multiple hot fluid channels are arranged at intervals along the first direction and the second direction, multiple cold fluid channels are arranged at intervals along the first direction and the second direction, and multiple phase change heat storage channels are arranged at intervals along the first direction and the second direction. Each adjacent hot fluid channel and cold fluid channel is separated by one phase change heat storage channel.

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