Hydrogen Catalyst Cooling Using Para-Ortho Heat Absorption
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Solution Overview
Problem
Existing vehicle cooling systems for hydrogen fuel cells and combustion engines are large, heavy, and costly, leading to reduced efficiency and increased aerodynamic drag, due to excessive thermal heat rejection.
Innovation Solution
A system that includes a catalyst positioned in the hydrogen flow path to convert hydrogen from a para state to an ortho state via an endothermic reaction, coupled with a coolant circuit and heat exchanger to absorb thermal load directly into the hydrogen fuel, reducing the need for a larger cooling system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a larger cooling system is used to reject thermal heat from hydrogen fuel cells, then heat rejection capability is improved, but vehicle weight and aerodynamic drag increase
Solution Approach 1:
The invention changes the thermal parameters of the hydrogen fuel by converting it from para-state to ortho-state, which has different heat capacity and thermal properties. This parameter change allows the hydrogen itself to participate in heat management, reducing the burden on the cooling system and enabling weight reduction
Solution Approach 2:
The hydrogen fuel serves a dual function: as an energy source and as a thermal management medium. By utilizing the hydrogen's own thermal properties and phase change characteristics, the system achieves self-cooling capability, reducing the need for separate heavy cooling infrastructure
2Temperature
If a larger cooling system is used to reject thermal heat, then heat rejection capability is improved, but aerodynamic drag increases
Solution Approach 1:
The invention extracts the thermal management function from the traditional cooling system and integrates it into the hydrogen fuel processing system. By removing the need for large radiators and cooling components, aerodynamic drag is reduced while maintaining effective heat rejection through the chemical transformation of hydrogen
3Temperature
If para-hydrogen is converted to ortho-hydrogen via endothermic reaction, then cooling capacity is improved, but system complexity increases
Solution Approach 1:
The invention merges the hydrogen conversion function with the existing fuel delivery system by integrating a catalyst into the fuel tank or fuel line. This combination approach achieves ortho-hydrogen generation for cooling purposes without requiring separate complex conversion equipment, thereby limiting the increase in system complexity
4Volume of stationary object
If thermal load is absorbed directly into hydrogen fuel, then cooling system size is reduced, but heat transfer efficiency requirements increase
Solution Approach 1:
The invention utilizes the phase transition and spin-state transition of hydrogen (from para to ortho state) as a mechanism for heat absorption. This phase/change transition provides a reliable and efficient heat transfer mechanism that can absorb significant thermal load while maintaining system compactness, thereby achieving both cooling system size reduction and maintaining heat transfer 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
This approach increases cooling capacity, reduces cooling system size and cost, and improves fuel efficiency by absorbing latent heat, allowing for optimal operating temperatures and minimizing separate fuel-conditioning hardware.
Implementation Method 1
the catalyst configured to convert hydrogen fuel from a para state to an ortho state via an endothermic reaction
Implementation Method 2
a coolant-fed heat exchanger configured to thermally couple the coolant in the coolant circuit to the hydrogen fuel
Data Source
AI summary
A hydrogen catalyst for vehicle cooling is described. A system may include a catalyst positioned in a flow path coupling a hydrogen storage tank to a hydrogen consumer, the catalyst configured to convert hydrogen fuel from a para state to an ortho state via an endothermic reaction. The system may further include a coolant circuit configured to circulate coolant through the hydrogen consumer and a coolant-fed heat exchanger configured to thermally couple the coolant in the coolant circuit to the hydrogen fuel, the coolant-fed heat exchanger arranged upstream of the hydrogen consumer in the flow path.