Hydrogen-Fueled Engine Heat Management With Dual Hydrogen Circuits
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Aircraft engines using hydrogen fuel face challenges in heat management due to its different heat capacities and temperature tolerances compared to traditional fuels like kerosene, leading to potential cracks and leaks in existing cooling systems.
Innovation Solution
A heat management system utilizing dual hydrogen circuits with heat exchangers and an intermediate fluid conduit to transfer heat efficiently, incorporating expanders and mixers to extract work and mitigate pressure gradients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional fuel cooling systems are used with hydrogen fuel, then the engine can operate with hydrogen, but temperature gradients cause cracks and leaks in the cooling system
Solution Approach 1:
The patent introduces an intermediate fluid (such as heat transfer oil or another suitable coolant) between the hydrogen fuel system and the engine cooling system. This intermediary fluid absorbs heat from the hydrogen fuel lines and transfers it to the engine cooling system, preventing direct thermal contact that would cause temperature gradients and material failure in hydrogen-compatible cooling systems.
2Temperature
If additional air cooling is added to compensate for hydrogen's different heat capacity, then cooling effectiveness improves, but system complexity increases
Solution Approach 1:
The patent designs the cooling system to serve multiple functions: the intermediate fluid not only cools the hydrogen fuel lines but also transfers heat to the engine cooling system, potentially driving power generation turbines or providing process heat. This multi-functionality reduces the need for separate air cooling systems while maintaining effective temperature control.
3Temperature
If heat is extracted from hydrogen fuel lines, then cooling efficiency improves, but pressure gradients increase causing potential leaks
Solution Approach 1:
The intermediate fluid acts as a thermal buffer between the hydrogen fuel lines and the heat extraction system. It absorbs heat from the hydrogen at controlled rates and transfers it to the engine cooling system or power generation components, distributing thermal extraction across multiple heat exchange stages rather than creating large temperature differentials that would cause pressure gradients and potential leaks.
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 system effectively reduces temperature gradients, minimizes leaks, and enhances cooling efficiency while extracting work, making it more compact and reliable than traditional systems.
Implementation Method 1
a second hydrogen conduit in thermal communication with an engine exhaust conduit to transfer heat from the engine exhaust conduit to the second hydrogen conduit, the second hydrogen conduit further in thermal communication with the first hydrogen conduit to transfer heat from the second hydrogen conduit to the first hydrogen conduit
Data Source
AI summary
A heat management system for a thermal engine includes a source of hydrogen, a first hydrogen conduit flowing a first flow of hydrogen therethrough, the first hydrogen conduit fluidly coupling the source of hydrogen to a fuel system of the thermal engine, and a second hydrogen conduit flowing a second flow of hydrogen therethrough. The second hydrogen conduit is in thermal communication with an engine exhaust conduit to transfer heat from the engine exhaust conduit to the second hydrogen conduit. The second hydrogen conduit is also in thermal communication with the first hydrogen conduit to transfer heat from the second hydrogen conduit to the first hydrogen conduit.