Electric fluid flow heater with stabilisation brace
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electric heaters for high-temperature gas heating face issues with component stress, fatigue, and failure due to axial and lateral deflection of the heating assembly under pressure differentials and high gas flow velocities, leading to reduced service lifetime and inefficient heat transfer.
Innovation Solution
An electric fluid flow heater design featuring a brace connected to the casing to inhibit axial and lateral movement of the jacket block relative to the casing, stabilizing the heating assembly and maintaining efficient thermal energy transfer, allowing operation at high temperatures up to 1200°C with reduced stress and fatigue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If gas flow velocity and pressure differential are increased to enhance heating effect, then heating efficiency is improved, but movement and vibration of heating assembly components increase leading to stress and fatigue
Solution Approach 1:
The heating assembly is designed with pre-stabilization features including a rigid support structure with the heating element centrally positioned within a tubular housing. This preliminary structural stabilization counteracts the harmful vibrations and movements that occur during high-velocity gas flow, allowing the system to operate at high productivity without compromising reliability
Solution Approach 2:
The tubular housing acts as an intermediary element between the heating element and the external environment. It provides mechanical support and constraint to the heating element, preventing excessive movement and vibration while allowing efficient heat transfer to occur. This mediator structure enables the system to withstand high pressure differentials and gas flow velocities
2Temperature
If heating temperature is increased to achieve higher heating effect, then heating efficiency is improved, but tendency for fracture and failure of heating element increases
Solution Approach 1:
The heating element is designed with optimized parameters including appropriate material selection for high-temperature resistance, controlled dimensions and cross-sectional area, and optimized length-to-diameter ratio. These parameter changes enable the element to withstand temperatures up to 1200°C while maintaining structural integrity and preventing fracture
Solution Approach 2:
The heating assembly utilizes materials with complementary properties - the heating element is made from materials resistant to thermal stress and oxidation, while the tubular housing provides mechanical support and thermal insulation. This composite material approach allows the system to operate at high temperatures without compromising the reliability of individual components
3Productivity
If heating assembly is orientated vertically to facilitate gas flow, then heating efficiency is improved, but gravitational forces increase stresses and deflection of assembly
Solution Approach 1:
The tubular housing provides structural support that counteracts the gravitational forces acting on the heating element in vertical orientation. The housing acts as a rigid framework that bears the weight and prevents excessive deflection, allowing the assembly to maintain its geometric stability while operating in vertical position for optimal gas flow and heating efficiency
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 effectively stabilizes the heating assembly, enhancing the service lifetime and maintaining high heating efficiency by minimizing independent movement of the jacket block and heating element, thus achieving stable operation at high temperatures with reduced stress and fatigue.
Implementation Method 1
the heating effect is achieved by passing current through the wires as the gas flows through the tube
Implementation Method 2
an electric heating element positioned within the tube to transfer heat to the gas as it flows into an open first end of the tube
Data Source
AI summary
An electric heater to heat a flow of a fluid having a jacket block comprising a plurality of longitudinal bores to allow the through-flow of a gas phase medium. An elongate heating element extends through each of the bores that together with the jacket block define a heating assembly to heat the gas. The heating assembly is positionally stabilised within the electric heater via at least one brace configured to inhibit undesirable independent axial and/or lateral movement of the heating assembly within the electric heater.