CN214407124U - Combined multistage efficient heat exchanger suitable for coaxial airflow - Google Patents
Combined multistage efficient heat exchanger suitable for coaxial airflow Download PDFInfo
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- CN214407124U CN214407124U CN202022930747.0U CN202022930747U CN214407124U CN 214407124 U CN214407124 U CN 214407124U CN 202022930747 U CN202022930747 U CN 202022930747U CN 214407124 U CN214407124 U CN 214407124U
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Abstract
The utility model provides a multistage high-efficient heat exchanger of combination formula suitable for coaxial air current belongs to fluid heat transfer technical field. The heat exchanger comprises a unit heat exchanger arranged in multiple stages, an axis airflow inlet, an inner fixing ring, an outer fixing ring and an axis airflow outlet. The heat exchanger of the utility model is a composite heat exchanger which uses liquid metal as heat transfer working medium and micro-channels to transfer heat; can promote the heat transfer area of heat exchanger in finite space, compare in traditional single-stage shell and tube type heat exchanger, effective heat transfer area has promoted about 50% in its unit heat transfer space.
Description
Technical Field
The utility model belongs to the technical field of the fluid heat transfer, concretely relates to multistage high-efficient heat exchanger of combination formula suitable for coaxial air current.
Background
The existing heat exchangers are various in types and have various characteristics, and can be divided into the following parts according to the heat transfer principle: dividing wall type heat exchanger, heat accumulating type heat exchanger, fluid connection indirect type heat exchanger, direct contact type heat exchanger and duplex heat exchanger; according to the structure, the method can be divided into: floating head heat exchangers, fixed tube-plate heat exchangers, U-shaped tube-plate heat exchangers, and the like. The shell-and-tube heat exchanger has the advantages of firm and reliable structure, strong adaptability, easy manufacture and capability of bearing higher pressure and temperature, but the heat exchange efficiency and the structure compactness are not as good as those of other novel heat exchangers. The coil type heat exchanger has simple structure, low cost and small operation sensitivity, but the flow velocity of fluid outside the pipe is small, so the heat transfer coefficient is small, the heat transfer efficiency is low and the required heat transfer area is large. The double-pipe heat exchanger has simple structure and high heat transfer coefficient, but has large metal consumption and is troublesome to overhaul and clean. The tube-plate heat exchanger has large heat transfer area, high heat transfer efficiency and easy manufacture, but has large flow resistance, easy blockage of a flow passage and poorer pressure resistance than the tube heat exchanger. The working temperature difference of the existing common heat exchanger is large, the floating head heat exchanger can resist the temperature of about 400 ℃ at most and withstand the pressure of about 6.4 MPa; the working temperature of the plate heat exchanger is-30-180 ℃, and the pressure is about 1.6MPa at most; the plate-fin heat exchanger is made of proper materials and can be used for heat exchange at the temperature of 1000K.
The heat exchanger in the prior art has the following defects:
1) the design of the heat exchanger is not designed aiming at the high-temperature and high-pressure axial flow service environment, and the targeted service environment is designed. The existing heat exchanger is designed aiming at different applicable occasions, and the requirements of various parameters such as working temperature, heat exchange medium, compact structure, flowing pressure drop and the like are difficult to be considered. In addition, under the high temperature condition, because the restriction of usage space and material rerum natura, common heat exchanger heat transfer area is difficult to satisfy the heat transfer demand, needs to carry out special structural design in order to increase compact structure nature.
2) The axial flow airflow condition has great requirements on the heat exchange efficiency and the axial flow loss of the heat exchanger, and the flow loss of the existing heat exchanger is great. On one hand, the heat exchange process is required to pursue the best heat exchange efficiency and heat exchange speed, and on the other hand, the interference of the heat exchange process of the heat exchanger on the flow is required to be reduced to the minimum stage so as to reduce the loss of the axial flow. The air flow loss caused by the design of the heat exchange surface of the existing heat exchanger is large, and the air flow heat exchange efficiency is influenced.
To the above problem, the utility model designs a heat exchanger lies in solving the not enough problem of traditional heat exchanger structural design. The high-efficiency and low-airflow-loss heat exchange environment under the high-pressure and high-temperature axial airflow environment is provided, the heat exchange efficiency of the heat exchanger is improved, and the flow loss in the heating airflow heat exchange process is reduced.
SUMMERY OF THE UTILITY MODEL
In order to achieve the above object, the present invention provides a heat exchanger with high heat exchange efficiency, compact structure, and applicability to tubular or ring channel. The heat exchanger is a composite heat exchanger which uses liquid metal as a heat transfer working medium and uses micro-channels for heat transfer.
The technical scheme of the utility model is that:
a combined type multistage efficient heat exchanger suitable for coaxial airflow comprises a unit heat exchanger 1-1, an axial airflow inlet 1-2, an inner fixing ring 1-3, an outer fixing ring 1-4 and an axial airflow outlet 1-5.
The unit heat exchanger 1-1 comprises a heating working medium inlet pipeline 2-1, a heating working medium first-stage shunt pipe 2-2, a heating working medium second-stage shunt pipe 2-3, a corrugated heat exchange thin fin 2-4, a heating working medium second-stage collecting pipe 2-5, a heating working medium first-stage collecting pipe 2-6, a heating working medium outlet pipeline 2-7, a heating inlet 2-8 and a heating outlet 2-9.
The corrugated heat exchange thin fins 2-4 are flat tube structures with openings at two ends, the two opening ends are both in uniform corrugated shapes, and the distribution interval between every two adjacent corrugations is not more than 20 mm. The cavity between the two opening ends forms a corrugated rectangular flow channel, and the interval between the upper surface and the lower surface of the corrugated rectangular flow channel is not more than 10 mm. The open ends of 60 corrugated heat exchange thin fins 2-4 are uniformly distributed along the circumferential direction of the axis, and the distribution angle interval is 6 degrees, so that a cylindrical structure is formed.
The heating working medium primary shunt pipe 2-2 and the heating working medium primary collecting pipe 2-6 are respectively positioned at two ends of the cylindrical structure; the heating working medium first-level shunt tubes 2-2 and the heating working medium first-level collecting tubes 2-6 are closed circular ring-shaped tubes, and the surfaces of the heating working medium first-level shunt tubes and the heating working medium first-level collecting tubes, which face the cylindrical structure, are uniformly provided with through holes with equal number along the circumferential direction at equal intervals. The heating working medium secondary shunt tubes 2-3 and the heating working medium secondary manifold tubes 2-5 are both tubular structures with the length being consistent with that of the opening ends of the corrugated heat exchange thin fins 2-4, the two tubular structures are provided with openings in the length direction, and the heating working medium secondary shunt tubes 2-3 and the heating working medium secondary manifold tubes 2-5 are respectively connected with the opening ends of the corrugated heat exchange thin fins 2-4, which are positioned on the outer side of the cylindrical structure, and the opening ends of the corrugated heat exchange thin fins 2-4, which are positioned on the inner side of the cylindrical structure through the openings. One end of the heating working medium second-stage shunt pipe 2-3 and one end of the heating working medium second-stage collecting pipe 2-5 are respectively connected with the through holes on the heating working medium first-stage shunt pipe 2-2 and the heating working medium first-stage collecting pipe 2-6.
The heating working medium inlet pipeline 2-1 is connected to the heating working medium first-level shunt pipe 2-2, and the heating working medium outlet pipeline 2-7 is connected to the heating working medium first-level collecting pipe 2-6. The channels between the adjacent corrugated heat exchange thin fins 2-4 form a heating flow channel of target heating gas, two ends of the heating flow channel are respectively provided with a heating inlet 2-8 and a heating outlet 2-9, wherein the heating inlet 2-8 is positioned at the end of a heating working medium outlet pipeline 2-7, and the heating outlet 2-9 is positioned at the end of a heating working medium inlet pipeline 2-1.
The inner fixing ring 1-3 is embedded into the center of the unit heat exchanger 1-1, and the outer fixing ring 1-4 is sleeved on the periphery of the unit heat exchanger 1-1. The central axes of the internal fixing ring 1-3, the external fixing ring 1-4 and the corrugated heat exchange thin fin 2-4 are consistent.
The unit heat exchangers 1-1 are arranged in multiple stages along the axial direction; the corrugated heat exchange thin fins 2-4 of the adjacent two-stage unit heat exchangers are arranged in different directions in a rotating mode around the central axis, namely the corrugated heat exchange thin fins 2-4 in the previous-stage unit heat exchanger are arranged in the anticlockwise direction, the corrugated heat exchange thin fins 2-4 in the next-stage unit heat exchanger are arranged in the clockwise direction, and the like according to the rule. The corrugated heat exchange thin fins 2-4 of the multi-stage unit heat exchanger are connected in series along the axis direction to form a heating flow channel of target heating gas, and an axis gas flow inlet 1-2 and an axis gas flow outlet 1-5 are respectively arranged at two ends of the heating flow channel.
Furthermore, the manufacturing materials of the heating working medium inlet pipeline 2-1, the heating working medium primary shunt pipe 2-2, the heating working medium secondary shunt pipe 2-3, the corrugated heat exchange thin fin 2-4, the heating working medium secondary collecting pipe 2-5, the heating working medium primary collecting pipe 2-6 and the heating working medium outlet pipeline 2-7 have high temperature resistance and good thermal conductivity, and comprise alloy materials such as tantalum-tungsten alloy, nickel-tungsten alloy, titanium-tungsten alloy, nickel-tantalum alloy, niobium-tungsten alloy or niobium-tantalum alloy and the like and composite materials such as silicon carbide and the like.
Further, the high-temperature heat source working medium is a liquid material with heat exchange capacity and high thermal conductivity under a high-temperature condition, and comprises liquid metal materials such as liquid lithium, liquid sodium, liquid potassium, liquid rubidium and liquid cesium, or liquid high-temperature alloy materials and liquid nonmetal materials.
The working process of the target heating gas in the unit heat exchanger is as follows:
the high-temperature heat source working medium flows in from a heating working medium inlet pipeline 2-1, sequentially passes through a heating working medium first-stage shunt pipe 2-2 and a heating working medium second-stage shunt pipe 2-3 to be subjected to flow distribution, and flows into a runner of a corrugated heat exchange thin fin 2-4 from the heating working medium second-stage shunt pipe 2-3, then is collected by a heating working medium second-stage manifold pipe 2-5, then enters a heating working medium first-stage manifold pipe 2-6, and finally flows out from a heating working medium outlet pipeline 2-7, so that the cooling process of the high-temperature heat source working medium is realized. The target heating gas flows in from the heating inlet 2-8, heat exchange is carried out in the heating flow channel, and the heated fluid flows out from the heating outlet 2-9, so that the temperature rise process of the target heating gas in the heat exchanger is realized.
The working process of the heat exchanger is as follows:
target heating gas enters the combined type multi-stage high-efficiency heat exchanger through the axial gas flow inlet 1-2, heat exchange is carried out between the target heating gas and a high-temperature heat source working medium in the unit heat exchangers 1-1 of different stages, and the target heating gas flows out from the axial gas flow outlet 1-5 after being heated and heated.
The reason that the corrugated heat exchange thin fins 2-4 among the multi-stage unit heat exchangers are arranged in opposite directions is as follows: the airflow passing through the unit heat exchanger generates additional tangential flow due to the spiral pipeline formed by the corrugated heat exchange thin fins 2-4, and rotational flow around the axis is formed for the whole flow, so that the flow loss is increased. The utility model discloses a set up the thin wing 2-4 range directions of the ripple heat transfer at different levels, effectively restrained the production of above-mentioned whirl, reduced the loss that flows.
The utility model has the advantages that: the utility model provides a new heat transfer mode of high-speed high-pressure draught of axial to a modular multistage high-efficient heat exchanger is provided. The heat exchanger can improve the heat exchange area of the heat exchanger in a limited space, and compared with the traditional single-stage shell-and-tube heat exchanger, the effective heat exchange area in a unit heat exchange space is improved by about 50%.
Drawings
Fig. 1 is a schematic view of the overall structure of the heat exchanger of the present invention.
Fig. 2 is a schematic structural view of the unit heat exchanger.
FIG. 3 is a schematic diagram of different stages of corrugated heat exchange thin fin arrangement.
FIG. 4 is a schematic structural view of corrugated heat exchanging thin fins.
In the figure: 1-1 unit heat exchanger; 1-2 axis airflow inlet; 1-3 internal retaining rings; 1-4 external fixation rings; 1-5 axis airflow outlets; 2-1 heating a working medium inlet pipeline; 2-2, heating the first-stage shunt pipe of the working medium; 2-3 heating the working medium secondary shunt pipe; 2-4 corrugated heat exchange thin fins; 2-5, heating a working medium secondary collecting pipe; 2-6, heating a working medium primary collecting pipe; 2-7 heating the working medium outlet pipeline; 2-8 heating inlet; 2-9 heating the outlet; 3-1 odd-level corrugated heat exchange thin fins; 3-2 even-numbered corrugated heat exchange thin fins.
Detailed Description
The present invention will be further described with reference to the following examples and accompanying drawings.
As shown in figure 1, the combined type multistage high-efficiency heat exchanger suitable for coaxial airflow comprises a unit heat exchanger 1-1, an axial airflow inlet 1-2, an inner fixing ring 1-3, an outer fixing ring 1-4 and an axial airflow outlet 1-5.
As shown in figure 2, the unit heat exchanger 1-1 comprises a heating working medium inlet pipeline 2-1, a heating working medium primary shunt pipe 2-2, a heating working medium secondary shunt pipe 2-3, a corrugated heat exchange thin fin 2-4, a heating working medium secondary manifold pipe 2-5, a heating working medium primary manifold pipe 2-6, a heating working medium outlet pipeline 2-7, a heating inlet 2-8 and a heating outlet 2-9.
As shown in fig. 4, the corrugated heat exchange thin fins 2-4 are flat tube structures with openings at two ends, the two openings are both uniform corrugations, and the distribution interval between two adjacent corrugations is 20 mm. The cavity between the two open ends forms a corrugated rectangular flow channel, and the interval between the upper surface and the lower surface of the corrugated rectangular flow channel is 10 mm. The open ends of 60 corrugated heat exchange thin fins 2-4 are distributed along the circumferential direction of the axis, and the distribution angle interval is 6 degrees, so that a cylindrical structure is formed.
The heating working medium primary shunt pipe 2-2 and the heating working medium primary collecting pipe 2-6 are respectively positioned at two ends of the cylindrical structure; the heating working medium first-level shunt pipe 2-2 and the heating working medium first-level collecting pipe 2-6 are closed circular ring-shaped pipes, and 60 through holes are uniformly formed in the surfaces of the heating working medium first-level shunt pipe and the heating working medium first-level collecting pipe, which face the cylindrical structure, at equal intervals along the circumferential direction. The heating working medium secondary shunt tubes 2-3 and the heating working medium secondary manifold tubes 2-5 are both tubular structures with the length being consistent with that of the opening ends of the corrugated heat exchange thin fins 2-4, the two tubular structures are provided with openings in the length direction, and the heating working medium secondary shunt tubes 2-3 and the heating working medium secondary manifold tubes 2-5 are respectively connected with the opening ends of the corrugated heat exchange thin fins 2-4, which are positioned on the outer side of the cylindrical structure, and the opening ends of the corrugated heat exchange thin fins 2-4, which are positioned on the inner side of the cylindrical structure through the openings. One end of the heating working medium second-stage shunt pipe 2-3 and one end of the heating working medium second-stage collecting pipe 2-5 are respectively connected with the through holes on the heating working medium first-stage shunt pipe 2-2 and the heating working medium first-stage collecting pipe 2-6.
The heating working medium inlet pipeline 2-1 is connected to the heating working medium first-level shunt pipe 2-2, and the heating working medium outlet pipeline 2-7 is connected to the heating working medium first-level collecting pipe 2-6. The channels between the adjacent corrugated heat exchange thin fins 2-4 form a heating flow channel of target heating gas, two ends of the heating flow channel are respectively provided with a heating inlet 2-8 and a heating outlet 2-9, wherein the heating inlet 2-8 is positioned at the end of a heating working medium outlet pipeline 2-7, and the heating outlet 2-9 is positioned at the end of a heating working medium inlet pipeline 2-1.
The inner fixing ring 1-3 is embedded into the center of the unit heat exchanger 1-1, and the outer fixing ring 1-4 is sleeved on the periphery of the unit heat exchanger 1-1. The central axes of the internal fixing ring 1-3, the external fixing ring 1-4 and the corrugated heat exchange thin fin 2-4 are consistent.
The unit heat exchangers 1-1 are arranged in a multi-stage mode along the axial direction, and the arrangement mode is as follows: first stage unit heat exchangers, second stage unit heat exchangers … …, and so on, respectively, in the flow direction; the corrugated heat exchange thin fins 2-4 of the adjacent two-stage unit heat exchangers are arranged in different directions in a rotating mode around the central axis, namely the corrugated heat exchange thin fins 2-4 in the previous-stage unit heat exchanger are arranged in the anticlockwise direction, the corrugated heat exchange thin fins 2-4 in the next-stage unit heat exchanger are arranged in the clockwise direction, and the like according to the rule. The corrugated heat exchange thin fins 2-4 of the multistage unit heat exchanger 1-1 are connected in series along the axis direction to form a heating flow channel of target heating gas, and an axis gas flow inlet 1-2 and an axis gas flow outlet 1-5 are respectively arranged at two ends of the heating flow channel.
High-pressure high-speed airflow enters the heat exchanger combination through the axial airflow inlet 1-2, heat exchange is carried out between the high-pressure high-speed airflow and high-temperature heat source working media in the unit heat exchangers 1-1 of different stages, and target heating air flows out from the axial airflow outlet 1-5 after being heated and heated.
The working process of the high-pressure high-speed airflow in the unit heat exchanger is as follows:
the high-temperature heat source working medium flows in from a heating working medium inlet pipeline 2-1, then flow distribution is carried out through a heating working medium primary flow dividing pipe 2-2 connected with the heating working medium inlet pipeline 1, and a heating working medium secondary flow dividing pipe 2-3 is connected to a through hole of the heating working medium primary flow dividing pipe 2-2 in a welding mode; fluid flows into a cavity runner in the corrugated heat exchange thin fin 2-4 from the second-stage shunt pipe 2-3 of the heating working medium, is collected by the second-stage manifold pipe 2-5 of the heating working medium, then enters the first-stage manifold pipe 2-6 of the heating working medium, and finally flows out of the outlet pipeline 2-7 of the heating working medium, so that the cooling process of the high-temperature heat source working medium is realized. High-pressure high-speed airflow flows in from the heating inlet 2-8, heat exchange is carried out in the heating flow channel, and heated fluid flows out from the heating outlet 2-9, so that the temperature rise process of the target heating gas in the heat exchanger is realized.
Claims (1)
1. A combined type multistage high-efficiency heat exchanger suitable for coaxial airflow is characterized by comprising a unit heat exchanger (1-1), an axial airflow inlet (1-2), an inner fixing ring (1-3), an outer fixing ring (1-4) and an axial airflow outlet (1-5);
the unit heat exchanger (1-1) comprises a heating working medium inlet pipeline (2-1), a heating working medium primary shunt pipe (2-2), a heating working medium secondary shunt pipe (2-3), corrugated heat exchange thin fins (2-4), a heating working medium secondary manifold pipe (2-5), a heating working medium primary manifold pipe (2-6) and a heating working medium outlet pipeline (2-7);
the corrugated heat exchange thin fins (2-4) are flat tube structures with openings at two ends, the two opening ends are uniform corrugations, and the distribution interval between two adjacent corrugations is not more than 20 mm; a cavity between the two opening ends forms a corrugated rectangular flow channel, and the interval between the upper surface and the lower surface of the corrugated rectangular flow channel is not more than 10 mm; the open ends of 60 corrugated heat exchange thin fins (2-4) are uniformly distributed along the circumferential direction of the axis, and the distribution angle interval is 6 degrees, so that a cylindrical structure is formed;
the heating working medium primary shunt pipe (2-2) and the heating working medium primary collector pipe (2-6) are respectively positioned at two ends of the cylindrical structure; the heating working medium primary flow dividing pipe (2-2) and the heating working medium primary flow collecting pipe (2-6) are closed circular ring-shaped pipes, and the surfaces of the heating working medium primary flow dividing pipe and the heating working medium primary flow collecting pipe facing the cylindrical structure are uniformly provided with through holes with equal number along the circumferential direction at equal intervals; the heating working medium secondary shunt tubes (2-3) and the heating working medium secondary manifold tubes (2-5) are both tubular structures with the length being consistent with that of the opening ends of the corrugated heat exchange thin fins (2-4), the two tubular structures are provided with openings in the length direction, and the heating working medium secondary shunt tubes (2-3) and the heating working medium secondary manifold tubes (2-5) are respectively connected with the opening ends of the corrugated heat exchange thin fins (2-4) positioned at the outer side of the cylindrical structure and the opening ends positioned at the inner side of the cylindrical structure through the openings; one end of the heating working medium secondary shunt pipe (2-3) and one end of the heating working medium secondary manifold pipe (2-5) are respectively connected with the through holes on the heating working medium primary shunt pipe (2-2) and the heating working medium primary manifold pipe (2-6);
the heating working medium inlet pipeline (2-1) is connected to the heating working medium primary shunt pipe (2-2), and the heating working medium outlet pipeline (2-7) is connected to the heating working medium primary manifold pipe (2-6); the channels between the adjacent corrugated heat exchange thin fins (2-4) form a heating flow channel of target heating gas, two ends of the heating flow channel are respectively provided with a heating inlet (2-8) and a heating outlet (2-9), wherein the heating inlet (2-8) is positioned at the end of a heating working medium outlet pipeline (2-7), and the heating outlet (2-9) is positioned at the end of a heating working medium inlet pipeline (2-1);
the inner fixing ring (1-3) is embedded into the center of the unit heat exchanger (1-1), and the outer fixing ring (1-4) is sleeved on the periphery of the unit heat exchanger (1-1); the central axes of the internal fixing ring (1-3), the external fixing ring (1-4) and the corrugated heat exchange thin fin (2-4) are consistent;
the unit heat exchangers (1-1) are arranged in a multi-stage mode along the axial direction, and corrugated heat exchange thin fins (2-4) of adjacent two-stage unit heat exchangers are arranged in an opposite rotating mode around the central axis; the corrugated heat exchange thin fins (2-4) of the multi-stage unit heat exchanger are connected in series along the axial direction to form a heating flow channel of target heating gas, and an axial gas flow inlet (1-2) and an axial gas flow outlet (1-5) are respectively arranged at two ends of the heating flow channel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022930747.0U CN214407124U (en) | 2020-12-07 | 2020-12-07 | Combined multistage efficient heat exchanger suitable for coaxial airflow |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022930747.0U CN214407124U (en) | 2020-12-07 | 2020-12-07 | Combined multistage efficient heat exchanger suitable for coaxial airflow |
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| CN214407124U true CN214407124U (en) | 2021-10-15 |
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| CN202022930747.0U Active CN214407124U (en) | 2020-12-07 | 2020-12-07 | Combined multistage efficient heat exchanger suitable for coaxial airflow |
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