Waste Hydrogen Power Generation with Partial Purification
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Solution Overview
Problem
In semiconductor manufacturing, hydrogen generated during epitaxial growth is often diluted and released due to its flammability, and the high purity required for fuel cells makes hydrogen purification costly and inefficient.
Innovation Solution
A waste hydrogen power generation device that includes a hydrogen generator, a purification unit to remove impurities from waste hydrogen, a storage unit for purified hydrogen, and a power generation unit that combusts purified hydrogen with oxygen to generate electricity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If hydrogen is used as fuel for fuel cells, then hydrogen can be utilized effectively, but the purification cost increases significantly due to the requirement of extremely pure hydrogen
Solution Approach 1:
The invention changes the purity parameter requirement from fuel cell level (extremely pure) to combustion engine level (lower purity acceptable), thereby reducing purification costs while still enabling effective hydrogen utilization for power generation
Solution Approach 2:
The invention uses a combustion engine that can tolerate impurities, effectively using a more robust and less expensive technology compared to fuel cells, allowing direct use of waste hydrogen without extensive purification
2Reliability
If hydrogen concentration is diluted and released outside the facility, then safety is ensured, but hydrogen resource is wasted
Solution Approach 1:
The invention converts the harmful waste hydrogen gas into a useful resource by using it as fuel for power generation, transforming an environmental and safety issue into an energy production opportunity
Solution Approach 2:
Instead of discarding hydrogen through dilution and release, the invention recovers waste hydrogen from semiconductor manufacturing processes and reuses it for power generation, preventing resource loss
3Manufacturing precision
If complex purification processes are used to remove impurities from waste hydrogen, then hydrogen purity increases, but device complexity and cost increase
Solution Approach 1:
The invention applies partial purification - removing only the most critical impurities (water, oxygen, carbon dioxide) to the extent needed for safe combustion, rather than achieving complete purification, thereby simplifying the purification system
Solution Approach 2:
The invention changes the target purity parameter from fuel cell requirements to combustion engine requirements, allowing a simpler purification system that removes only essential impurities while maintaining sufficient purity for power generation
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 solution allows for the reuse of hydrogen in semiconductor manufacturing for power generation with reduced purification costs and loads, effectively addressing the challenge of utilizing waste hydrogen while providing electricity to facilities.
Implementation Method 1
the impurities of the waste hydrogen may be removed through contact with water
Implementation Method 2
a power generation unit that operates a power generator by combusting the purified hydrogen supplied from the storage unit and oxygen in an atmosphere
Data Source
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AI summary
A waste hydrogen power generation device (1A; 1B) is characterized by including a hydrogen generator (10); a purification unit (20) that collects waste hydrogen discarded from the hydrogen generator (10) and removes impurities other than hydrogen to prepare purified hydrogen; a storage unit (30) that stores the purified hydrogen; and a power generation unit (40) that operates a power generator (41) by combusting the purified hydrogen supplied from the storage unit (30) and oxygen in an atmosphere.