Internal Combustion Engine Fuel Conditioning for Hydrogen-Rich Gas
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Solution Overview
Problem
Existing internal combustion engines are sensitive to increasing hydrogen content in fuel gas, requiring retrofitting or membrane units for conditioning, which is costly and challenging for systems needing quick starts.
Innovation Solution
A method involving a fuel gas mixture with a maximum specified hydrogen content, using pipeline gas with recompression and membrane separation, and a heating step to maintain optimal operating temperature, utilizing an indirect fired or bath heater for efficient hydrogen depletion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a membrane unit is added for fuel gas conditioning, then existing internal combustion engines can use hydrogen-rich fuel gases, but the device complexity and cost increase
Solution Approach 1:
The membrane unit is pre-installed and pre-heated during standby mode before the engine is actually needed. This preliminary action ensures that when the engine requires fuel gas conditioning, the membrane unit is already ready to operate, eliminating startup delays while maintaining the ability to handle hydrogen-rich fuels.
Solution Approach 2:
The membrane unit acts as an intermediary device between the fuel gas source and the internal combustion engine. It selectively separates hydrogen from the fuel gas mixture, conditioning the gas to appropriate hydrogen levels before delivery to the engine, thus enabling engine compatibility without modifying the engine itself.
2Adaptability or versatility
If a membrane unit is added for fuel gas conditioning, then hydrogen-rich fuel gases can be used, but the starting time increases
Solution Approach 1:
The membrane unit is heated to operating temperature during standby periods before the engine is actually needed. This preliminary heating action eliminates the thermal warm-up time that would otherwise delay engine startup, allowing the system to transition immediately to fuel gas conditioning when required.
Solution Approach 2:
The heating system maintains continuous operation during standby mode to keep the membrane unit at optimal temperature. This continuous useful action ensures that the membrane separation process can begin immediately when fuel gas conditioning is required, avoiding interruptions and delays.
3Adaptability or versatility
If the membrane unit is designed for varying temperatures, then it can handle different operating conditions, but the equipment cost increases due to overdesign
Solution Approach 1:
The system pre-heats the membrane unit to a fixed optimal temperature during standby mode. This preliminary action allows the membrane unit to be designed for a specific temperature range rather than accommodating all possible temperature variations, reducing manufacturing costs while still handling different operating conditions through active temperature control.
Solution Approach 2:
The system actively controls and maintains the membrane unit at an optimal temperature parameter through heating during standby and operation. By changing and stabilizing the temperature parameter to an optimal value, the membrane unit can be designed for narrower temperature specifications, reducing manufacturing costs while maintaining adaptability through temperature regulation.
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
Enables the use of existing engines with varying hydrogen content, ensuring quick starts and reduced costs by maintaining design temperature during standby, suitable for remote locations without power supply.
Implementation Method 1
said hydrogen depletion including a membrane separation
Implementation Method 2
Said pipeline gas is at least in part subjected to a heating step before being subjected to the hydrogen depletion when a temperature of the pipeline gas is determined to be below a specified temperature
Implementation Method 3
utilizing an indirect fired or bath heater for efficient hydrogen depletion
Data Source
AI summary
A method of operating an internal combustion engine specified to be run with a fuel gas mixture comprising at least one hydrocarbon and hydrogen in a maximum specified hydrogen content using a pipeline gas withdrawn from a pipeline and comprising the at least one hydrocarbon and a hydrogen content exceeding the maximum specified hydrogen content is provided. The pipeline gas is at least in part subjected to a hydrogen depletion to yield a hydrogen depleted gas mixture not exceeding the maximum specified hydrogen content. Said hydrogen depleted gas mixture is at least in part used as the fuel gas and said hydrogen depletion includes a membrane separation. A corresponding arrangement is also part of the present invention.