CN202420268U - Heat exchange tube of containment-based passive heat export system heat exchanger - Google Patents
Heat exchange tube of containment-based passive heat export system heat exchanger Download PDFInfo
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- CN202420268U CN202420268U CN2011205515275U CN201120551527U CN202420268U CN 202420268 U CN202420268 U CN 202420268U CN 2011205515275 U CN2011205515275 U CN 2011205515275U CN 201120551527 U CN201120551527 U CN 201120551527U CN 202420268 U CN202420268 U CN 202420268U
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Abstract
The utility model relates to the structural design of a heat exchanger and particularly relates to a heat exchange tube of a containment-based passive heat export system heat exchanger. The heat exchange tube comprises a tube body, and the tube body is internally provided with a strengthening heat exchange component connected with the inner wall of the tube body. As a specific implementation, the strengthening heat exchange component can be in the structure of a spiral bond or a plurality of fins or an internal thread. The heat exchange tube provide by the utility model can not only strengthen the heat exchange effect of the heat exchanger, but also save the exterior space of the heat pipe, thus improving the heat exchange capacity of a double-layer concrete containment passive waste heat export system.
Description
Technical field
The utility model relates to the heat exchanger structure design, is specifically related to the heat exchanger tube of the non-active heat guiding system heat exchanger of a kind of containment.
Background technology
Third generation nuclear power plant containment shell adopts two big types of technology to guarantee the integrality of nuclear power station the 3rd road barrier both at home and abroad, prevents that a large amount of radioactive substances from leaking.A kind of is the interior metal containment, and the outside is a prestressed concrete containment vessel, and this technical scheme is used in the construction of AP1000, and in order to make the containment decrease temperature and pressure, the overhead water tank sprays inner metal containment and reaches the cooling purpose after the accident; Another kind is the double layer concrete containment, has non-active refrigerating function in order to make the containment cooling, need adopt heat exchanger to be connected with outer tank in inside, relies on the mode of Natural Circulation to carry out heat exchange.
The flow process of these systems normally; The heating that internal exchanger (heat exchanger in the containment) is received high-temperature gas (the highest 150 ℃) in the containment; Working medium expanded by heating in the heat exchanger upwards flows; Get into containment and cool off water tank (or being submerged in the external heat exchanger cooling in the cooling water tank) outward; The higher working medium of cooling back low temperature, density is (or being submerged in the external heat exchanger the cooling water tank) the entering internal exchanger that flows downward along down-comer from the containment outer tank, and whole process relies on Natural Circulation to accomplish the heat export function.
In order to strengthen the heat exchange property of internal exchanger; Prior art is carried out the step-down processing to the natural convection loop of closure usually; Let internal exchanger working medium seethe with excitement in advance; Principle and thermal siphon heat pipe are similar, and adopt the arrangement of certain inclination angle and refluence plate, let high temperature air wash away heat exchanger according to certain way.In addition; Also consider in the prior art at the outside reinforced heat exchanger (like fin, wing rib etc.) that increases of the heat exchanger tube of heat exchanger, in order to strengthen the heat exchange property of single tube, still; The external strengthening heat-exchanger rig exists obvious defects, can't in concrete engineering practice, use.This is that these gases externally form liquid film on the reinforced heat exchanger, do not reach the purpose of enhanced heat exchange on the contrary because the containment after the accident contains the gas that a large amount of air, hydrogen etc. are difficult for condensing.In addition,, take certain space, thereby also reduced the radical of arranging heat exchanger tube, do not reach the purpose of enhanced heat exchange from heat exchanger on the whole though these external strengthening heat-exchanger rigs have been strengthened the heat exchange of single tube.Closed natural convection loop is after step-down is handled; (for example be lower than 100 ℃) though can seethe with excitement in advance; Enhanced heat exchange; But be difficult in the state that guarantees its sealing in 60 year projected life of nuclear power station and be in negative pressure on the engineering, so European Union only advanced the small-scale test bench test, do not put into engineering construction.
The utility model content
The purpose of the utility model is the defective to prior art, and the heat exchange tube structure of the non-active heat guiding system heat exchanger of containment is improved, and neither takies the space outerpace of heat exchanger tube, can realize the effect of enhanced heat exchange again.
The technical scheme of the utility model is following: the heat exchanger tube of the non-active heat guiding system heat exchanger of a kind of containment, comprise body, and in body, be provided with the enhanced heat exchange spare that is connected with inboard wall of tube body.
Further, the heat exchanger tube of the non-active heat guiding system heat exchanger of aforesaid containment, wherein, described enhanced heat exchange spare is the spirality tie.
Further, the heat exchanger tube of the non-active heat guiding system heat exchanger of aforesaid containment, wherein, described enhanced heat exchange spare is several fins.
Further, described fin has four, even distributed and arranged on inboard wall of tube body.
Further, the heat exchanger tube of the non-active heat guiding system heat exchanger of aforesaid containment, wherein, described enhanced heat exchange spare is the screw thread that is positioned at spirals on the inboard wall of tube body.
Further, the screw thread of said spirals is set directly on the inwall of heat exchanger tube, and perhaps, the screw thread of said spirals is the flight that external diameter matches with internal diameter of tube body.
The beneficial effect of the utility model is following: handle the heat exchanger tube inside of the utility model heat exchanging device; Increased the structure that is used to strengthen heat exchange; The heat exchange effect of heat exchanger was strengthened; Simultaneously do not take the space outerpace of heat exchanger tube again, thereby improved the exchange capability of heat of double layer concrete containment passive residual heat guiding system.
Description of drawings
Fig. 1 adopts the principle assumption diagram of spirality tie enhanced heat exchange for the utility model;
Fig. 2 is inner heat exchanger tube sectional view with spirality tie;
Fig. 3 is inner heat exchanger tube sectional view with fin;
Fig. 4 has the heat exchanger tube sectional view of screw thread for inwall.
The specific embodiment
Below in conjunction with concrete embodiment and accompanying drawing the utility model is further described.
Enhanced heat exchange design for the non-active heat guiding system heat exchanger of containment; Owing to can not really realize the purpose of enhanced heat exchange at the outer setting reinforced heat exchanger of heat exchanger tube; Therefore, handle the inside of the utility model exchange heat pipe, reaches the purpose of enhanced heat exchange.
The enhanced heat exchange spare that the utility model is connected with inboard wall of tube body in the heat exchanger tube set inside of heat exchanger through the heat transfer effect of enhanced heat exchange spare, is realized enhanced heat exchange.A kind of concrete way of realization such as Fig. 1, shown in Figure 2, described enhanced heat exchange spare is a spirality tie 2, and spirality tie 2 is welded on the inwall of body 1, and the outer wall of body 1 is smooth structure.Can make fluid produce spiral flow and secondary circulation (shown in dotted arrow among Fig. 1) at adding spirality tie in the heat-transfer pipe; Reduce tube fluid by the critical Reynolds number of laminar flow to turbulent flow; Minimizing is as the boundary layer thickness of the main thermal resistance of convection heat transfer' heat-transfer by convection, and making conducts heat is strengthened, particularly during low reynolds number; Its strengthening effect is better, accommodates to strengthen the heat transfer of gas under low reynolds number.The research of the tie augmentation of heat transfer that relative theory can be summed up in review article in 1973 referring to Date first; Subsequently; Hong S W, Bergles A E, Marner W J and Berles A E and Seymour have also reported the result of dissimilar ties reinforcement light pipe heat exchange in succession.
The inner enhanced heat exchange scheme of the heat exchanger tube that the utility model provided; Be not limited to the above-mentioned structure that the spirality tie is set in light pipe; Theoretically; At the multiple multi-form inner member of the inner increase of light pipe, can strengthen the light pipe heat transfer process, thereby improve double layer concrete containment passive residual heat guiding system exchange capability of heat.
The another kind of embodiment of the utility model is as shown in Figure 3, and the enhanced heat exchange spare that is connected with inboard wall of tube body that in the body 1 of heat exchanger tube, is provided with is several fins 3.Be provided with 4 fins in the present embodiment altogether, evenly be welded on the inwall of body.
The third embodiment of the utility model is as shown in Figure 4; The screw thread 4 of spirals is set on body 1 inwall of heat exchanger tube; This screw thread can directly be processed on body 1 inwall; Formation is set directly at the internal thread on body 1 inwall, also can be arranged on the flight that interior external diameter of body and body 1 internal diameter adapt.
The utility model is at the inner member of the light pipe set inside enhanced heat exchange of the non-active heat guiding system internal exchanger of double layer concrete containment; Reduce tube fluid by the critical Reynolds number of laminar flow to turbulent flow; Minimizing is as the boundary layer thickness of the main thermal resistance of convection heat transfer' heat-transfer by convection, and making conducts heat is strengthened.And the reinforced heat exchanger of the utility model does not take the light pipe space outerpace, does not influence the arrangement space of internal exchanger light pipe, is the preferred version of the non-active heat guiding system internal exchanger enhanced heat exchange of double layer concrete containment.
Obviously, those skilled in the art can carry out various changes and modification to the utility model and not break away from the spirit and the scope of the utility model.Like this, belong within the scope of the utility model claim and equivalent technology thereof if these of the utility model are revised with modification, then the utility model also is intended to comprise these changes and modification interior.
Claims (7)
1. the heat exchanger tube of the non-active heat guiding system heat exchanger of containment comprises body (1), it is characterized in that: in body (1), be provided with the enhanced heat exchange spare that is connected with inboard wall of tube body.
2. the heat exchanger tube of the non-active heat guiding system heat exchanger of containment as claimed in claim 1 is characterized in that: described enhanced heat exchange spare is spirality tie (2).
3. the heat exchanger tube of the non-active heat guiding system heat exchanger of containment as claimed in claim 1, it is characterized in that: described enhanced heat exchange spare is several fins (3).
4. the heat exchanger tube of the non-active heat guiding system heat exchanger of containment as claimed in claim 3 is characterized in that: described fin (3) has four, even distributed and arranged on inboard wall of tube body.
5. the heat exchanger tube of the non-active heat guiding system heat exchanger of containment as claimed in claim 1 is characterized in that: described enhanced heat exchange spare is for being positioned at the screw thread (4) of spirals on body (1) inwall.
6. the heat exchanger tube of the non-active heat guiding system heat exchanger of containment as claimed in claim 5 is characterized in that: the screw thread of said spirals (4) is set directly on the inwall of heat exchanger tube.
7. the heat exchanger tube of the non-active heat guiding system heat exchanger of containment as claimed in claim 5 is characterized in that: the flight that the screw thread of said spirals (4) matches with body (1) internal diameter for external diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205515275U CN202420268U (en) | 2011-12-26 | 2011-12-26 | Heat exchange tube of containment-based passive heat export system heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205515275U CN202420268U (en) | 2011-12-26 | 2011-12-26 | Heat exchange tube of containment-based passive heat export system heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202420268U true CN202420268U (en) | 2012-09-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205515275U Expired - Lifetime CN202420268U (en) | 2011-12-26 | 2011-12-26 | Heat exchange tube of containment-based passive heat export system heat exchanger |
Country Status (1)
| Country | Link |
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| CN (1) | CN202420268U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104296584A (en) * | 2014-10-17 | 2015-01-21 | 中国石油大学(华东) | Spiral band passive enhancement heat exchanging pipe |
| CN104344758A (en) * | 2013-07-29 | 2015-02-11 | 华北电力大学 | Spiral flow type anti-deposition reverse U-shaped pipe |
| CN104810068A (en) * | 2014-01-26 | 2015-07-29 | 上海核工程研究设计院 | Pressure container with fins on outer wall surface |
| CN107731321A (en) * | 2017-09-30 | 2018-02-23 | 中国核电工程有限公司 | A kind of passive containment thermal conduction system protector |
-
2011
- 2011-12-26 CN CN2011205515275U patent/CN202420268U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104344758A (en) * | 2013-07-29 | 2015-02-11 | 华北电力大学 | Spiral flow type anti-deposition reverse U-shaped pipe |
| CN104810068A (en) * | 2014-01-26 | 2015-07-29 | 上海核工程研究设计院 | Pressure container with fins on outer wall surface |
| CN104296584A (en) * | 2014-10-17 | 2015-01-21 | 中国石油大学(华东) | Spiral band passive enhancement heat exchanging pipe |
| CN107731321A (en) * | 2017-09-30 | 2018-02-23 | 中国核电工程有限公司 | A kind of passive containment thermal conduction system protector |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120905 |
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| CX01 | Expiry of patent term |