JP2014105917A - Cooling system and flying object - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling system with high cooling efficiency.SOLUTION: A cooling system includes piping through which refrigerant passes through, and catalyst increasing a cooling performance of the refrigerant. The piping includes a first section and a second section receiving heat quantity more than that of the first section. The catalyst is provided such that the cooling performance is better in the first region than in the second region.

Description

  The present invention relates to a cooling system and a flying object to which the cooling system is applied.

  Cooling systems (cooling mechanisms) are used to cool engine combustion chambers, power plant reactors, chemical plant chemical reactors, and the like. A typical cooling system includes a pipe through which a refrigerant passes, and cools the surroundings by supplying the refrigerant to the pipe.

  Moreover, in order to improve the cooling capacity by a refrigerant, a catalyst may be used (for example, refer patent document 1). Specifically, a chemical change accompanied with an endothermic reaction is caused by applying a catalyst to the refrigerant. This increases the cooling capacity of the refrigerant.

JP 2009-41418 A

  Consider a case where the distribution of the amount of heat flowing into the pipe from the object to be cooled is uneven. In this case, excessive cooling is performed in the region where the inflow heat amount is small, while the cooling capacity may be insufficient in the region where the inflow heat amount is large. In order to compensate for the lack of cooling capacity, it is necessary to increase the amount of refrigerant to be supplied unnecessarily, which is inefficient.

  One object of the present invention is to provide a cooling system with high cooling efficiency.

  [Means for Solving the Problems] will be described below using the numbers and symbols used in [Best Mode for Carrying Out the Invention]. These numbers and symbols are added in parentheses in order to clarify the correspondence between the description of [Claims] and [Best Mode for Carrying Out the Invention]. However, these numbers and symbols should not be used for the interpretation of the technical scope of the invention described in [Claims].

  In one aspect of the invention, a cooling system (1) is provided. The cooling system (1) includes a pipe (2) through which the refrigerant (3) passes and a catalyst (4) that increases the cooling capacity of the refrigerant (3). The pipe (2) includes a first region (RA) and a second region (RB) having an inflow heat amount larger than that of the first region (RA). The catalyst (4) is provided such that the cooling capacity is higher in the second region (RB) than in the first region (RA).

  In the flow direction of the refrigerant (3), the first region (RA) may be located on the upstream side, and the second region (RB) may be located on the downstream side. Alternatively, the first region (RA) may be located on the downstream side, and the second region (RB) may be located on the upstream side.

  In another aspect of the present invention, a flying object (10) is provided. The flying body (10) is provided inside the combustion chamber (11), the wall (15) of the combustion chamber (11), pipes (2, 12) through which the refrigerant (3) passes, and refrigerant ( And a catalyst (4) for increasing the cooling capacity of 3). The pipes (2, 12) include a first region (RA) and a second region (RB) having a larger amount of inflow heat than the first region (RA). The catalyst (4) is provided such that the cooling capacity is higher in the second region (RB) than in the first region (RA).

  The refrigerant (3) may be fuel (13) supplied to the combustion chamber (11).

  According to the present invention, a cooling system with high cooling efficiency is realized.

FIG. 1 is a schematic diagram showing a configuration of a cooling system according to an embodiment of the present invention. FIG. 2 is a conceptual diagram for explaining the functions and effects according to the embodiment of the present invention. FIG. 3 is a schematic diagram showing a modification of the cooling system according to the embodiment of the present invention. FIG. 4 is a schematic diagram showing another modification of the cooling system according to the embodiment of the present invention. FIG. 5 is a schematic view showing a flying object to which the cooling system according to the embodiment of the present invention is applied.

  Embodiments of the present invention will be described with reference to the accompanying drawings.

1. FIG. 1 is a schematic diagram showing a configuration of a cooling system (cooling mechanism) 1 according to the present embodiment. The cooling system 1 includes a pipe 2 through which the refrigerant 3 passes and supplies the refrigerant 3 to the pipe 2 to cool the surroundings.

  In the present embodiment, the catalyst 4 is used to improve the cooling capacity of the refrigerant 3. By applying the catalyst 4 to the refrigerant 3, a chemical change accompanied by an endothermic reaction is caused. Thereby, the cooling capacity of the refrigerant 3 increases. In the example shown in FIG. 1, the refrigerant 4 is applied to the inner wall of the pipe 2.

Examples of the refrigerant 3 include hydrocarbons such as C ₁₂ H ₂₄ . Examples of the catalyst 4 include zeolite catalysts including H-ZSM-5 doped with platinum group (Pt, Rh, Pd). In the case of the combination of the refrigerant 3 and the catalyst 4, an endothermic reaction “C ₁₂ H ₂₄ → C ₆ H ₁₂ × 2” occurs.

  Here, a case where the distribution of the amount of heat flowing into the pipe 2 from the object to be cooled is not uniform is considered. For example, in FIG. 1, the pipe 2 includes a first region RA and a second region RB. It is assumed that the inflow heat amount to the first region RA is relatively small and the inflow heat amount to the second region RB is relatively large. That is, the amount of heat that flows into the second region RB is greater than the amount of heat that flows into the first region RA.

  In this case, the catalyst 4 is provided such that the cooling capacity of the refrigerant 3 is higher in the second region RB than in the first region RA. That is, according to the present embodiment, the distribution of the catalyst 4 is adjusted according to the inflow heat amount distribution. In the example of FIG. 1, the catalyst 4 is not provided in the first region RA, and the catalyst 4 is provided only in the second region RB. As a result, the cooling capacity in the second region RB is higher than the cooling capacity in the first region RA.

  With reference to FIG. 2, the operation and effect of the present embodiment will be described. FIG. 2 shows the temperature distribution of the pipe 2.

  First, as a comparative example, consider a case where the catalyst 4 is uniformly provided in the pipe 2. The temperature distribution in the comparative example is indicated by a broken line. In the case of the comparative example, since the catalyst 4 is provided uniformly, the first region RA having a small inflow heat amount may be cooled more than necessary, while the second region RB having a large inflow heat amount may not be cooled. There is. Excessive cooling in the first region RA means that the catalyst 4 is consumed wastefully. Further, if the temperature in the second region RB exceeds the upper limit value T1 of the heat resistant temperature of the pipe material, the pipe 2 may be damaged and dangerous. In particular, as shown in FIG. 2, when the first region RA is located upstream and the second region RB is located downstream in the flow direction of the catalyst 3, the temperature rise in the second region RB becomes significant. This is because an endothermic reaction is generated by the catalyst 4 also in the first region RA, and the cooling capacity of the refrigerant 3 is consumed correspondingly. In other words, as a result of the wasteful cooling capacity of the refrigerant 3 on the low temperature upstream side, there is a possibility that the cooling is not sufficiently performed on the high temperature downstream side.

  Next, consider the case of this embodiment. The temperature distribution in the present embodiment is indicated by a solid line. In the case of the present embodiment, the catalyst 4 is not provided in the first region RA where the inflow heat amount is small. Therefore, excessive cooling does not occur in the first region RA, and wasteful consumption of the catalyst 4 is prevented. In addition, since the endothermic reaction hardly occurs in the first region RA, the cooling capacity of the refrigerant 3 remains without being wasted. Therefore, even when the high-temperature second region RB is located on the downstream side of the first region RA, the refrigerant 3 can sufficiently exhibit its cooling capacity. As a result, even if the same amount of catalyst 4 is used, the temperature of the second region RB is lower than in the comparative example.

  As described above, according to the present embodiment, the cooling system 1 with high cooling efficiency is realized. As a result, it is possible to reduce the amount of refrigerant 3 and catalyst 4 required. Further, these actions and effects can be realized without changing the physical structure of the pipe 2 and are suitable.

2. In the example shown in FIG. 1, the catalyst 4 is not provided in the first region RA, and the catalyst 4 is provided only in the second region RB. However, the distribution method of the catalyst 4 is not limited to this. The catalyst 4 may be provided so that the cooling capacity of the refrigerant 3 is higher in the second region RB than in the first region RA. For example, as shown in FIG. 3, the density of the catalyst 4 provided in the second region RB may be higher than the density of the catalyst 4 provided in the first region RA.

  In the example shown in FIG. 1, the refrigerant 4 is applied to the inner wall of the pipe 2. However, the arrangement method of the refrigerant 4 is not limited to this. For example, as illustrated in FIG. 4, a lump of granular catalyst 4 may be disposed in the flow path in the pipe 2. In this case, since the surface area of the catalyst 4 as a whole is increased, the cooling capacity is further increased.

3. Application Example The cooling system 1 according to the present embodiment is applicable to cooling of a combustion chamber of an engine, a reaction furnace of a power plant, a chemical reactor of a chemical plant, and the like, for example. Hereinafter, as an example, a case where the cooling system 1 according to the present embodiment is applied to cooling a flying engine will be described.

  FIG. 5 schematically shows the flying object 10 according to the present embodiment. The flying body 10 includes a combustion chamber 11, a fuel pipe 12, and a fuel tank 14. Fuel 13 is stored in the fuel tank 14 and supplied to the combustion chamber 11 through the fuel pipe 12.

Here, the fuel pipe 12 is formed so as to extend along the combustion chamber 11 inside the wall 15 of the combustion chamber 11. This is because the fuel 13 before being injected into the combustion chamber 11 is used for cooling the combustion chamber 11. That is, in the configuration of FIG. 5, the fuel pipe 12 corresponds to the pipe 2 and the fuel 13 corresponds to the refrigerant 3. Hydrocarbons such as C ₁₂ H ₂₄ can be used as the fuel 13 and the refrigerant 3.

  The cooling system 1 according to the present embodiment can be applied to such a configuration. Since the temperature distribution of the combustion chamber 11 is non-uniform and there are a high temperature region and a low temperature region, the distribution of the catalyst 4 may be adjusted according to the temperature distribution (see FIGS. 1 and 2).

  The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the above-described embodiments, and can be appropriately changed by those skilled in the art without departing from the scope of the invention.

DESCRIPTION OF SYMBOLS 1 Cooling system 2 Piping 3 Refrigerant 4 Catalyst 10 Flying object 11 Combustion chamber 12 Fuel pipe 13 Fuel 14 Fuel tank 15 Wall RA 1st area | region RB 2nd area | region

Claims (4)

Piping through which refrigerant passes;
A catalyst for increasing the cooling capacity of the refrigerant,
The piping is
A first region;
A second region having a larger inflow heat amount than the first region;
The catalyst is provided such that the cooling capacity is higher in the second region than in the first region. The cooling system according to claim 1,
The cooling system, wherein the first region is located upstream and the second region is located downstream in the flow direction of the refrigerant. A combustion chamber;
A pipe provided inside the wall of the combustion chamber, through which a refrigerant passes;
A catalyst for increasing the cooling capacity of the refrigerant,
The piping is
A first region;
A second region having a larger inflow heat amount than the first region;
The said catalyst is provided so that the said cooling capacity may become higher in the said 2nd area | region than the said 1st area | region. The flying body according to claim 3,
The refrigerant is a fuel supplied to the combustion chamber.

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