High-Pressure Heat Exchanger Header with Stress-Distributing Channels
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Solution Overview
Problem
Existing heat exchangers are not designed to handle high-pressure fluids, leading to structural issues such as cracking and leaking when exposed to pressures above approximately 65 bars (950 psi), necessitating a new design that can accommodate and efficiently transfer thermal energy without compromising structural integrity.
Innovation Solution
A high-pressure heat exchanger header system with a first high-pressure transition section that divides high-pressure fluid into multiple channels, spaced in a radial and circular configuration to reduce stress, and a second transition section that further divides these channels into sub-flow channels, all with round cross-sections, combined with a low-pressure flow path for efficient thermal energy transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional heat exchanger headers are used with low-pressure design, then manufacturing is simple and economical, but the structure cannot handle high-pressure fluids above 65 bars causing cracking and leaking
Solution Approach 1:
The header is divided into multiple flow channels with a specific spacing pattern. The circular arrangement of flow channel inlets with varying circumferential spacing creates a segmented structure that distributes stress more effectively throughout the header body, preventing cracking and leaking under high pressure while maintaining manufacturability.
Solution Approach 2:
The flow channel inlets are arranged asymmetrically in terms of spacing - outer inlets have greater circumferential spacing than inner inlets. This asymmetric spacing pattern optimizes stress distribution in the header wall under high-pressure conditions, allowing the structure to handle pressures above 65 bars without requiring overly complex reinforcement.
2Productivity
If flow channels are spaced closer together, then more channels can be packed into the header, but stress concentration increases causing cracking and leaking
Solution Approach 1:
Different regions of the header have different flow channel spacing characteristics. Outer flow channels have greater circumferential spacing to reduce stress concentration in high-stress regions, while inner channels maintain tighter spacing to maximize thermal energy transfer efficiency. This local variation in spacing optimizes both productivity and structural integrity.
Solution Approach 2:
The flow channels are arranged in a circular pattern around the header circumference rather than in a simple linear or grid pattern. This circular arrangement in the radial dimension allows for optimized spacing distribution - outer channels naturally have more circumference to work with, providing greater spacing to reduce stress while maintaining high channel density for efficient heat transfer.
3Volume of moving object
If non-round cross-sections are used for flow channels, then space utilization improves, but manufacturing precision and stress distribution deteriorate
Solution Approach 1:
The flow channels have a circular cross-section rather than rectangular or other polygonal shapes. This circular geometry provides superior stress distribution under internal pressure, as the curved walls naturally resist hoop stress more uniformly. Additionally, circular channels are easier to manufacture with consistent precision using conventional piping and forming processes, avoiding the complexity of creating accurate non-circular sections.
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
The design provides sufficient strength and stress distribution to handle high-pressure fluids, preventing cracking and leaking while maintaining economical manufacturing and efficient thermal energy transfer between high and low-pressure fluids.
Implementation Method 1
The inlets for the multiple first high-pressure flow channels on a radially outer edge of the first high-pressure transition section are spaced further apart in a circumferential direction from adjacent inlets of the multiple first high-pressure flow channels than radially inward inlets are spaced from adjacent radially inward inlets of the multiple first high-pressure flow channels
Implementation Method 2
Typical heat exchangers are designed to provide a configuration in which a hot fluid can transfer thermal energy to a cold fluid
Data Source
Figure 1
Figure 2A~2B
Figure 2C
AI summary
A header for a high-pressure heat exchanger includes a first high-pressure transition section (38) with inlets for multiple first high-pressure flow channels (36) that are spaced from one another in a radial direction and collectively arranged in a substantially circular shape. The inlets for the multiple first high-pressure flow channels on a radially outer edge of the first high-pressure transition section are spaced further apart in a circumferential direction from adjacent inlets of the multiple first high-pressure flow channels than radially inward inlets are spaced from adjacent radially inward inlets of the multiple first high-pressure flow channels. The header also includes multiple first high-pressure flow channels (36) extending from the first high-pressure transition section to a second-high pressure transition section (70) that is configured to divide each of the multiple first high-pressure flow channels into at least two first high-pressure sub-flow channels. Each flow channel of the multiple first high-pressure flow channels and each sub-flow channel of the first high-pressure sub-flow channels have a round cross-sectional shape.