Alternating Diameter Pipe Routing for Nuclear Reactor Pressure Drop
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Solution Overview
Problem
In nuclear reactor power generation facilities, the routing of high-pressure fluid pipes is hindered by structural members, leading to increased pressure drops and difficulty in spraying fluids at high pressure due to the need for large flow passage areas, which complicates installation and flexibility.
Innovation Solution
A high-pressure fluid discharge device is designed with pipes formed by alternately connecting first pipes with smaller flow passage areas and second pipes with larger areas, allowing for increased flow passage and flexible routing while suppressing pressure drops, using stainless steel and liquid nitrogen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If pipes with large flow passage areas are used to suppress pressure drop, then pressure drop is reduced, but pipe routing becomes difficult due to large diameters requiring bent pipes and elbows
Solution Approach 1:
The pipe is segmented into alternating sections of small diameter and large diameter. The small diameter sections enable easy routing around structural members, while the large diameter sections suppress pressure drop. This segmentation allows the pipe to combine the advantages of both small and large diameter pipes.
Solution Approach 2:
Different sections of the pipe have different diameters optimized for different functions. The small diameter sections are placed where routing flexibility is needed, while the large diameter sections are placed where pressure drop suppression is critical. This local differentiation optimizes overall system performance.
2Loss of energy
If pipes with large flow passage areas are used to maintain high pressure, then pressure drop is suppressed, but installation time increases due to complex routing requirements
Solution Approach 1:
The pipe is divided into alternating small and large diameter sections, allowing straightforward installation without requiring complex bent pipes and elbows. This reduces installation time while maintaining pressure through the large diameter sections.
Solution Approach 2:
Large diameter sections are strategically placed to suppress pressure drop where needed, while small diameter sections are used where easy routing is needed, optimizing both pressure maintenance and installation efficiency.
3Adaptability or versatility
If pipes are elongated to avoid structural members, then routing flexibility is achieved, but pressure drop increases making high pressure spraying impossible
Solution Approach 1:
The pipe alternates between small and large diameter sections, allowing it to be elongated and routed around structural members while the large diameter sections compensate for the increased length by reducing pressure drop.
Solution Approach 2:
Different sections have different diameters optimized for different functions: small diameter for routing flexibility and large diameter for pressure drop suppression, allowing the pipe to be both long and efficient.
4Ease of operation
If bent pipes and elbows are used to route large diameter pipes, then routing is achieved, but installation complexity and time increase
Solution Approach 1:
The pipe is segmented into alternating small and large diameter sections, allowing it to be routed easily without requiring bent pipes and elbows. The small diameter sections are inherently more flexible and easier to install.
Data Source
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AI summary
Provided is a high-pressure fluid discharge device in which a pipe (31), to which a nozzle is connected, is routed and a high pressure fluid transferred through the pipe (31) is discharged from the nozzle, wherein the pipe (31) is formed by alternately connecting first pipes (31a) and second pipes (31b) having a larger flow passage area than the first pipes (31a).