Continuous helical baffle heat exchanger
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional heat exchangers face limitations in increasing heat flux and total heat exchange area without significant space constraints, which hampers efficient heating of working fluids.
Innovation Solution
A heater assembly featuring a continuous series of helical members with perforations and heating elements arranged in a geometric helicoid pattern, guiding the working fluid in a helical flow to enhance heat transfer efficiency and reduce radiative heat loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the total heat exchange area is increased to heat the working fluid more quickly and efficiently, then the heat output is improved, but the space required in the heat exchanger increases, reducing the volume available for containing the working fluid
Solution Approach 1:
The patent transforms the traditional linear arrangement of heating elements into a three-dimensional helical configuration. The heating elements are wound in a helical pattern around the working fluid flow path, effectively utilizing volumetric space rather than just linear space. This dimensional transformation allows the heating elements to wrap around and contact the working fluid from multiple directions simultaneously, dramatically increasing the heat exchange area within the same volume while maintaining adequate space for fluid circulation.
2Productivity
If the heat flux of the heating elements is increased to improve heat output, then the heating efficiency is improved, but the heat flux is limited by the materials and design of the heating elements as well as other application specific requirements
Solution Approach 1:
The patent divides the heating system into multiple discrete heating element segments arranged in a helical sequence. Rather than relying on a single high-flux heating element, the system uses multiple lower-flux elements that collectively provide the required heat output. This segmentation allows each individual heating element to operate within safe material limits while the cumulative effect of all segments achieves the desired total heat flux, overcoming material constraints through distributed heating.
3Ease of manufacture
If traditional heating arrangements are used, then the structure is simple, but the heat transfer efficiency is reduced and fouling increases
Solution Approach 1:
The patent employs curved helical heating elements instead of straight linear arrangements. The helical curvature creates a spiral flow pattern that continuously renews the thermal boundary layer between the heating elements and the working fluid. This curved geometry enhances convective heat transfer by preventing stagnant zones and promoting uniform heat distribution, thereby improving heat transfer efficiency while maintaining a manufacturable structure through standard coiling processes.
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 solution provides consistent linear temperature rise, increased heat transfer efficiency, and reduced fouling, while maintaining a compact footprint by guiding the working fluid in a helical flow across the heating elements, thus overcoming the limitations of traditional heat exchangers.
Implementation Method 1
The heat is transferred from the heating fluid to the working fluid via the walls of the tubes
Implementation Method 2
guiding the working fluid in a helical flow to enhance heat transfer efficiency
Implementation Method 3
reduced radiative heat loss
Data Source
AI summary
A heater assembly includes a continuous series of perforated helical members and a plurality of electrical resistance heating elements. The perforated helical members cooperate to define a geometric helicoid disposed about a longitudinal axis of the heater assembly. Each perforated helical member defines opposed edges and a predetermined pattern of perforations. The perforations extend through each perforated helical member parallel to the longitudinal axis. The heating elements extend through the perforations.