Hydrogen Compressing Assembly with Centrifugal Staging to 40 Bar
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Solution Overview
Problem
Current hydrogen production technologies, such as steam-reforming, are not environmentally friendly due to carbon dioxide emissions and have high operational costs, and hydrogen, being a light molecule, is difficult to transport efficiently at ambient pressures.
Innovation Solution
A hydrogen production plant utilizing electrolysis and a novel compressing assembly with centrifugal and integrally geared centrifugal compressors to increase hydrogen pressure to 30-40 bar, comprising multiple substages with barrel compressors and integrally geared centrifugal compressors, driven by variable or fixed speed electric motors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If steam-reforming process is used to produce hydrogen, then hydrogen can be produced at 30-40 bar pressure, but carbon dioxide is emitted and environmental impact increases
Solution Approach 1:
The patent changes the production method from steam-reforming to electrolysis, fundamentally altering the chemical process parameters to eliminate CO2 emission while maintaining hydrogen production capability at required pressures
Solution Approach 2:
The patent replaces the thermal-chemical steam-reforming process with an electrochemical electrolysis process, substituting mechanical/thermal energy conversion with electrical energy conversion to produce hydrogen without carbon emissions
2Quantity of substance
If methane is burnt to produce hydrogen, then hydrogen can be obtained, but operational costs and plant footprint increase
Solution Approach 1:
The patent replaces the combustion-based steam-reforming process with electrolysis, eliminating the need for methane burning infrastructure and reducing operational costs associated with fuel handling and CO2 management
Solution Approach 2:
The patent extracts and eliminates the methane combustion step from the hydrogen production process, removing the source of operational complexity and cost associated with fuel processing and emissions management
3Ease of operation
If hydrogen is transported at ambient pressure, then transportation is simple, but efficiency decreases due to hydrogen's light molecular weight
Solution Approach 1:
The patent applies preliminary compression to hydrogen during the production process, prepressurizing it to 30-40 bar before storage and transportation, thereby eliminating the need for separate compression steps later and improving overall system efficiency
Solution Approach 2:
The patent changes the pressure parameter of hydrogen from ambient to high pressure (30-40 bar) during production, fundamentally altering the state of the gas to optimize both transportation efficiency and subsequent handling operations
4Stress or pressure
If conventional compressors are used to compress hydrogen, then compression can be achieved, but device complexity and maintenance needs increase
Solution Approach 1:
The patent segments the compression system into modular units with independent drive trains, allowing each compressor stage to be optimized separately and reducing overall system complexity through standardized components
Solution Approach 2:
The patent replaces conventional mechanical compression systems with electrolysis-based hydrogen generation, eliminating the need for complex compression infrastructure and reducing maintenance requirements associated with moving parts and seals
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 solution enables efficient, high-pressure hydrogen production with reduced environmental impact and operational costs, allowing for compact plant design and increased reliability with lower maintenance needs.
Implementation Method 1
a hydrogen production plant configured to produce hydrogen by electrolysis
Implementation Method 2
compressing the hydrogen by at least one centrifugal compressor
Implementation Method 3
compressing the hydrogen by at least one of an integrally geared centrifugal compressor
Data Source
AI summary
A hydrogen production plant, to produce hydrogen having a compressing assembly, for increasing the pressure of the hydrogen. The compressing assembly has at least one barrel compressor and at least one integrally geared centrifugal compressor. Also disclosed are methods of compressing hydrogen.