Parallel Rod Heat Accumulator for High-Debit Fog Vaporization

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Solution Overview

Problem

Prior art heat accumulators in fog generators are inefficient in vaporizing fog liquid at high debit due to insufficient heat transfer, leading to incomplete vaporization and operational issues such as warping, corrosion, and high production costs, especially when dealing with high operating pressures.

Innovation Solution

A heat accumulator comprising multiple closely stacked, parallel round rods made of corrosion-resistant materials, with inert beads and a distribution agent to enhance heat transfer and prevent non-optimal channel formation, allowing for efficient vaporization of fog liquid under high pressure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If prior art heat accumulators use traditional channel designs, then they can maintain structural simplicity, but they cannot completely vaporize high debit fog liquid due to insufficient heat transfer surface area

Engineering Contradiction:
Improvefog liquid vaporization capacityVSAvoidheat accumulator structure
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The heat accumulator is segmented into multiple parallel channels, each contributing to the overall heat transfer surface area. This segmentation allows the system to handle high debit fog liquid flow while maintaining sufficient residence time for complete vaporization, resolving the contradiction between productivity and device complexity.

Inventive Principle:
Principle #1Segmentation

2Speed

If fog liquid is forced through the heat accumulator at high pressure and high debit, then fog generation speed increases, but incomplete vaporization occurs due to insufficient heat transfer

Engineering Contradiction:
Improvefog generation speedVSAvoidcomplete vaporization
Core Design Contradiction:
SpeedVSReliability

Solution Approach 1:

The invention transitions from a single-channel design to a multi-channel parallel architecture, effectively adding a spatial dimension to the heat transfer process. This allows high pressure and high debit operation while maintaining sufficient heat transfer surface area contact time for complete vaporization, resolving the contradiction between speed and reliability.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

3Ease of manufacture

If plates are welded together to form heat accumulator channels, then heat transfer surfaces are created, but warping and distortion occur during manufacturing and operation

Engineering Contradiction:
Improveheat accumulator productionVSAvoidplate alignment and distortion control
Core Design Contradiction:
Ease of manufactureVSManufacturing precision

Solution Approach 1:

The heat accumulator is divided into multiple independent parallel channels rather than welding plates together. This segmentation eliminates the warping and distortion problems associated with plate welding while maintaining effective heat transfer surface area, resolving the contradiction between ease of manufacture and manufacturing precision.

Inventive Principle:
Principle #1Segmentation

4Ease of manufacture

If traditional heat accumulator materials are used, then production costs are reduced, but corrosion resistance is insufficient under high temperature and oxygen exposure

Engineering Contradiction:
Improveproduction costVSAvoidcorrosion resistance
Core Design Contradiction:
Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The invention employs corrosion-resistant materials for the heat accumulator channels, either as the base material or through protective coatings. This use of composite or specialized materials provides sufficient corrosion resistance under high temperature and oxygen exposure while maintaining cost-effectiveness, resolving the contradiction between ease of manufacture and corrosion resistance.

Inventive Principle:
Principle #40Composite materials

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 enables complete vaporization of fog liquid at high debit with improved corrosion resistance, reduced production complexity, and cost-effectiveness, while maintaining thermal efficiency and pressure resistance.

Implementation Method 1

Heating the heat accumulator to the desired temperature regularly happens via Joules transfer from within an electrical resistance wire

Methodology Applied
Scientific EffectJoule heating: Joule Heating

Implementation Method 2

The heat flow to the transfer surfaces of the vaporization channels/passages is mainly provided for via thermal conduction

Methodology Applied
Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 3

The temperature of the heat accumulator, at least at the outlet, is higher than the boiling point of the fog liquid to be vaporized

Methodology Applied
Scientific EffectBoiling: Boiling

Implementation Method 4

heat (joules) is stored by its heat capacity C (eg. steel: ̃0.46 J/° C. per g) and/or possibly latent congelation heat of a phase-transition agent

Methodology Applied
Scientific EffectPhase change: Phase Change

Data Source

PatentUS10209037B2Heat accumulator for fog generator
Publication Date: 2019.02.19 BANDIT NV
  • US10209037B2 patent drawing
  • US10209037B2 patent drawing
  • US10209037B2 patent drawing

AI summary

The invention provides a heat accumulator (1) for vaporizing fog liquid in a fog generator, the heat accumulator comprising multiple closely contiguous, parallel oriented rods (2) with a diameter of between 0.2 mm and 15 mm.