Heat exchanger having a plurality of modular tube bundles
阅读：189发布：2022-07-02
专利汇可以提供Heat exchanger having a plurality of modular tube bundles专利检索，专利查询，专利分析的服务。并且A heat exchanger having a plurality of vertical modular tube bundles which nest at their lower ends in a common pressure vessel, each tube bundle having its upper portion enclosed in a separate individual shell and flange arrangement to provide a heat exchanger having the thermal and hydraulic stability necessary for an evaporator employed with a liquid metal fast breeder nuclear reactor and to provide modules which can be easily and rapidly removed and replaced for inspection and servicing.，下面是Heat exchanger having a plurality of modular tube bundles专利的具体信息内容。
1. A heat exchanger for transferring heat from a primary to a secondary fluid, said heat exchanger comprising at least one tube bundle having a head at each end thereof, a long stem portion, and an arcuate portion extending from said long stem portion, a secondary fluid port in each head of said tube bundle so disposed to permit said secondary fluid to flow through said tubes of said tube bundle, a separate tubular shell portion enwrapping the long stem portion of said tube bundle, a primary fluid port disposed in said long stem shell portion, a vessel having a primary fluid port therein, said arcuate portion of said tube bundle being disposed in said vessel, and said tubular shell being in communication with said vessel and arranged to permit flow of primary fluid along the outer surface of said tubes in the long stem portion of said tube bundle, when flow between said primary port in said vessel and said primary port in said shell portion is established.
2. A heat exchanger as set forth in claim 1, wherein the vessel has at least one opening for receiving the arcuate portion of the tube bundle and cover means for said opening adapted to seal said opening and form a closure encompassing the tubular shell.
3. A heat exchanger as set forth in claim 1, wherein the primary fluid port in the tubular shell is adjacent the head at the end of the long stem portion.
4. A heat exchanger as set forth in claim 1, wherein the tubular shell has an enlarged cross sectional area adjacent the primary fluid port.
5. A heat exchanger as set forth in claim 1, wherein the ports for primary and secondary fluids are so disposed to permit the primary and secondary fluid to flow in counterflow relation in the long stem portion of the tube bundle.
6. A heat exchanger as set forth in claim 1, wherein the tube bundle has a short stem portion, on the end of the tube bundle opposite the end having the long stem portion, the long and short stem portions of the tube bundle each having a shell portion extending from adjacent the heads at the ends of the stems to a location within the vessel, the shell portions within the vessel being in communication with the vessel.
7. A heat exchanger as set forth in claim 6 and further comprising a supply of inert gas to maintain a level of primary fluid in the vessel, the tube bundle entering the vessel above the primary fluid level and extending downwardly into the primary fluid, the shell portion of the long stem portion of the tube bundle terminating in the primary fluid, the shell portion of the short stem terminating above said fluid level, and the terminal end of each shell portion being open to the vessel.
8. A heat exchanger as set forth in claim 6, wherein the shell portion of the short stem portion terminates a short distance from the location where it enters the vessel and the shell portion of the long stem portion terminates a greater distance from the location where it enters the vessel.
9. A heat exchanger as set forth in claim 6, and further comprising a sleeve disposed in the long stem portion of the tube bundle said sleeve extending from adjacent the head at one end of the long stem portion of the tube bundle to adjacent the other end of the long stem of the tube bundle.
10. A heat exchanger as set forth in claim 9 and further comprising a ring disposed between the shell and the sleeve adjacent the primary port disposed in the shell portion, the ring being adapted to cause the primary fluid to flow through the center of the sleeve and across the outer surface of the tube disposed in the long stem portion of the tube bundle.
11. A heat exchanger as set forth in claim 9, wherein the tube bundle and shell are removable from the vessel and the tube bundle and heads are removable from the long anD short stem shells.
12. A heat exchanger as set forth in claim 11, wherein the sleeve has lengthwise seams so disposed that when the tube bundle is removed from the short and long stem shells the sleeve can be removed from the long stem portion of the tube bundle.
13. A heat exchanger as set forth in claim 1, wherein the secondary fluid ports are so disposed that the secondary fluid enters the head at one end of the tube bundle in a liquid state and leave the head at the end of the long stem portion of the tube bundle in a gaseous state.
14. A heat exchanger as set forth in claim 1, wherein neither the primary nor the secondary fluid changes state within the heat exchanger.
15. A heat exchanger as set forth in claim 1, wherein there are a plurality of tube bundles and each tube bundle has a separate shell portion enwrapping the long stem portion thereof.
16. A heat exchanger for transferring heat from a primary to a secondary fluid, said heat exchanger comprising a vessel having a primary port therein, a plurality of modular tube bundles having a head at each end thereof, a separate tubular shell enwrapping the major portion of each tube bundle, a secondary fluid port so disposed in each head to permit secondary fluid to flow through the tubes of said tube bundles, a portion of each tube bundle being disposed in said vessel, a primary fluid port being disposed in each tubular shell, said tubular shells being in communication with said vessel and disposed to permit primary fluid to flow over the outer surface of said tubes in said major portion of said tube bundle when a flow between said primary ports in said shells and said primary ports in said vessel is established, and said vessel having a plurality of openings for receiving the shells and tube bundles and closure means for forming a seal between the shells and the vessel.
17. A heat exchanger for transferring heat from a primary to a secondary fluid, said heat exchanger comprising a vessel having a primary port therein, a plurality of modular tube bundles having a head at each end thereof, a separate tubular shell enwrapping the major portion of each tube bundle, a secondary fluid port so disposed in each head to permit secondary fluid to flow through the tubes of said tube bundles, a portion of each tube bundle being disposed in said vessel, a primary fluid port being disposed in each tubular shell, a sleeve disposed between each shell and tube bundle and extending into the vessel, and said tubular shells being in communication with said vessel and disposed to permit primary fluid to flow over the outer surface of said tubes in said major portion of said tube bundle when a flow between said primary ports in said shells and said primary ports in said vessel is established.
18. A heat exchanger as set forth in claim 17, wherein the shells are removable from the vessel, the tube bundles are removable from the shells end the sleeves are removable from the tube bundles.
19. A heat exchanger as set forth in claim 17 and further comprising a ring so disposed between each shell and sleeve to cause primary fluid to flow through the center of each sleeve when a flow of primary fluid is established between the primary ports in the shells and the primary port in the vessel.
20. A heat exchanger as set forth in claim 17 and further comprising a plurality of sheets disposed in the vessel between adjacent tube bundles.
21. A heat exchanger as set forth in claim 17 and further comprising a plurality of perforated sheets disposed in the vessel between adjacent tube bundles.
22. A heat exchanger for transferring heat from a primary to a secondary fluid, said heat exchanger comprising a vessel having a primary port therein, a plurality of modular tube bundles having a head at each end thereof, a separate tubular shell enwrapping the major portion of each tube bundle, a secondary fluid port so disposed in each head to permit secondary fluid to flow through the tubes of said tube bundles, each tube bundle having a reverse bend portion which is disposed in said vessel, a primary fluid port being disposed in each tubular shell, and said tubular shells being in communication with said vessel and disposed to permit primary fluid to flow over the outer surface of said tubes in said major portion of said tube bundle when a flow between said primary ports in said shells and said primary ports in said vessel is established.
23. A heat exchanger for transferring heat from a primary to a secondary fluid, said heat exchanger comprising a vessel having a primary port therein, a plurality of modular tube bundles having a head at each end thereof, a separate tubular shell enwrapping the major portion of each tube bundle, a secondary fluid port so disposed in each head to permit secondary fluid to flow through the tubes of said tube bundles, each tube bundle having a short portion and a reverse bend joining the short portion and the major portion said reverse bend being disposed in said vessel, a primary fluid port being disposed in each tubular shell, and said tubular shells being in communication with said vessel and disposed to permit primary fluid to flow over the outer surface of said tubes in said major portion of said tube bundle when a flow between said primary ports in said shells and said primary ports in said vessel is established.
24. A heat exchanger as set forth in claim 23 wherein the major portion of each tube bundle extends in the vertical direction and the lower portion of each tube bundle is disposed in the vessel.
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