Catalytic Burner for Stirling Engine Heat Distribution
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Solution Overview
Problem
Existing Stirling engine heat transfer technologies are inefficient and complex, failing to provide uniform heat distribution to the heater head, which hampers the engine's performance.
Innovation Solution
A catalytic reactor with a combustion chamber, fuel and oxidant inlets, a combustion catalyst, a heat spreader, and an ignition system for flameless combustion, which generates heat and transfers it efficiently to the Stirling engine's heater head through conduction and convection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional burners with combustion chambers and flame-based heating are used, then heat generation capability is achieved, but heat distribution uniformity deteriorates
Solution Approach 1:
The patent replaces the mechanical flame-based combustion system with a catalytic combustion system. The catalyst layer facilitates chemical reactions without requiring flame, thereby eliminating the complexity of flame control and heat distribution mechanisms while achieving uniform heat transfer to the heater head.
Solution Approach 2:
The patent changes the combustion mode from flame-based to catalytic-based, fundamentally altering the temperature distribution parameters. This parameter change enables uniform heat generation across the catalyst surface, which directly improves heat distribution uniformity to the heater head.
2Productivity
If flame-based combustion is used for heat generation, then heat transfer rate is achieved, but system efficiency deteriorates due to heat loss
Solution Approach 1:
The patent substitutes flame-based combustion with catalytic combustion, which operates at lower temperatures and reduces thermal losses. The catalyst enables complete combustion at lower temperatures, improving heat transfer efficiency to the working fluid while minimizing energy loss through flame radiation and convection.
3Productivity
If complex heat transfer mechanisms are employed, then heat transfer efficiency is improved, but device simplicity deteriorates
Solution Approach 1:
The patent replaces complex flame-based heat transfer mechanisms with a simple catalytic layer that directly contacts the heater head. This substitution achieves efficient heat transfer through direct thermal conduction from the catalyst to the heater head, eliminating the need for complex intermediate heat transfer components.
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 catalytic reactor provides a simple, efficient, and effective method for heat generation and transfer, enhancing Stirling engine performance by ensuring uniform heat distribution to the heater head, thus improving engine efficiency.
Implementation Method 1
a combustion catalyst positioned within the chamber in fluid communication with the fuel and oxidant inlet means
Implementation Method 2
initiating flameless combustion of the fuel with the oxidant
Implementation Method 3
a heat spreader positioned in between the catalyst and the heat acceptor surface and contacting both the catalyst and the heat acceptor surface
Implementation Method 4
transfers it efficiently to the Stirling engine's heater head through conduction and convection
Implementation Method 5
transfers it efficiently to the Stirling engine's heater head through conduction and convection
Data Source
AI summary
The invention provides an apparatus for generating heat and transferring the heat to a heater head of an external combustion engine, preferably, a Stirling engine. Fuel and air are introduced into a combustion chamber and mixed to form an air/fuel mixture. The air/fuel mixture is combusted over a combustion catalyst positioned in physical contact with a heat spreader, which itself is positioned in physical contact with a heat acceptor surface. The heat acceptor surface is secured in thermal communication with the heater head. Depending upon the design of the heater head, heat flux from the heat acceptor surface into the heater head may occur radially or non-radially.