Heat Exchanger Tube Bundle Optimization for Water Treatment
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Solution Overview
Problem
Current heat exchangers do not have an optimal design that balances temperature difference, pressure loss, and flow rate to effectively adapt to the specific needs of water treatment systems while maximizing efficiency and performance.
Innovation Solution
A heat exchanger comprising a heat exchanger cartridge with a cylindrical pattern of tubes and baffles, and a heat exchanger shell with a hypochlorite inlet and outlet, designed to efficiently heat water by counter-current heat exchange with hypochlorite, optimizing temperature, pressure, and flow rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If traditional heat exchangers are used to heat water in water treatment systems, then water temperature can be increased, but the design does not optimally balance temperature difference, pressure loss, and flow rate
Solution Approach 1:
The patent applies parameter changes by optimizing specific geometric parameters of the heat exchanger including tube inner diameter (0.25-0.375 inches), tube length (36-72 inches), number of tubes (12-24), and baffle spacing (6-12 inches apart). These parameter adjustments create an optimal balance between temperature difference, pressure loss, and flow rate that adapts to water treatment system requirements while maximizing heating efficiency
2Temperature
If heat exchanger tubes are made longer to increase heat exchange efficiency, then temperature difference utilization improves, but pressure loss increases
Solution Approach 1:
The patent optimizes tube length within the range of 36-72 inches to balance heat exchange efficiency and pressure loss. This parameter change ensures sufficient heat transfer surface area while maintaining acceptable pressure drop characteristics for water treatment applications.
Solution Approach 2:
The patent segments the heat exchange process by using multiple tubes (12-24 tubes) arranged in a bundle with baffles spaced 6-12 inches apart. This segmentation distributes the heat exchange function across multiple pathways, improving overall efficiency while managing pressure loss through parallel flow channels.
3Productivity
If more tubes are added to increase heat exchange capacity, then productivity improves, but device complexity increases
Solution Approach 1:
The patent optimizes the number of tubes within the range of 12-24 tubes, finding the optimal balance between heat exchange capacity and manufacturing complexity. This parameter change provides sufficient heat transfer surface area while maintaining reasonable manufacturing and maintenance requirements.
Solution Approach 2:
The patent combines multiple functions into the tube bundle structure: heat exchange, flow distribution, and structural support. The cylindrical arrangement of 12-24 tubes with spaced baffles creates an integrated system that achieves high heat exchange capacity without proportionally increasing complexity, as the same structural elements serve multiple purposes.
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 heat exchanger effectively heats water to temperatures above 55°F while maintaining a pressure loss of the hypochlorite in the shell of less than 0.2 psi, enhancing the efficiency and performance of water treatment systems.
Implementation Method 1
heating the water flowing through the plurality of tubes by exchanging heat with the hypochlorite flowing through the heat exchanger shell
Data Source
AI summary
The present invention relates to a heat exchanger. The heat exchanger includes: a heat exchanger cartridge and a heat exchanger shell. The heat exchanger cartridge includes: a first end with a water inlet and outlet; a second closed end; a plurality of tubes that extend between the first end and the second end; and a plurality of baffles attached to one or more of the tubes. The heat exchanger shell includes: a hollow body with a first end having an opening for receiving the heat exchanger cartridge, and a second closed end; a hypochlorite inlet positioned at the first end; and a hypochlorite outlet positioned at the second end. The plurality of tubes can each independently have a length within a range of from 37 and 80 inches, and an inner diameter within a range of from 0.170 inches and 0.190 inches.