One-Piece Helical Baffle for Shell and Tube Heat Exchangers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional shell and tube heat exchangers face challenges in achieving satisfactory heat transfer and durability, particularly due to the limitations of multi-piece baffles which can lead to pressure drop and structural weaknesses.
Innovation Solution
A one-piece helical baffle with a solid or hollow core and aligned tubes is used, where the baffle and core are formed together using methods like additive manufacturing, providing a smoother flow path and eliminating potential weaknesses at joints, and allowing for simultaneous formation of holes and tubes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-piece baffles are used in conventional shell and tube heat exchangers, then the heat transfer path can be configured, but joint weaknesses and structural durability are reduced
Solution Approach 1:
The patent merges the flight and core into a single integrated baffle structure formed as one piece. This eliminates the joints between separate flight and core components, removing joint weaknesses that compromise structural durability while maintaining the helical flow path configuration for heat transfer.
2Productivity
If conventional multi-piece baffles are used, then assembly is simplified, but pressure drop increases and heat transfer efficiency decreases
Solution Approach 1:
The integrated one-piece construction of the flight and core creates a continuous, smooth flow path without joints or interruptions. This reduces turbulence and pressure drop while improving heat transfer efficiency, as the merged structure eliminates flow disturbances that would occur at joint interfaces in multi-piece baffles.
3Reliability
If separate flight and core components are used, then manufacturing is easier, but joint weaknesses reduce overall durability
Solution Approach 1:
The flight and core are merged into a single monolithic component formed in one piece. This eliminates all joints and interfaces that would create weakness points, significantly improving durability and reliability while the single-piece construction simplifies the overall manufacturing process despite requiring advanced forming capabilities.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances heat transfer efficiency by reducing pressure drop and increasing durability, as it eliminates joint weaknesses and allows for efficient fluid flow, making the heat exchanger more effective and long-lasting.
Implementation Method 1
providing a smoother flow path and eliminating potential weaknesses at joints
Implementation Method 2
heat transfer from one fluid to the other takes place through those walls
Implementation Method 3
a first fluid is admitted to and flows through the shell and a second fluid is admitted to the tubes
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A baffle (26) for a shell and tube heat exchanger (2) comprises a one piece helical flight (38) extending from a central core (24). The helical flight (38) has a plurality of aligned openings (42) for receiving tubes (20) of the heat exchanger (2). The helical flight (38) may be made by machining from a casting or solid block of material, or by an additive manufacturing process.