Counter-rotating Blade Rows for Hydrogen Compressor Specific Work
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Solution Overview
Problem
Current compression technologies for hydrogen gas, particularly those with low molecular weight and density, face limitations in achieving high specific work and pressure ratios efficiently, often requiring costly metals and having compact footprint challenges.
Innovation Solution
A multi-stage compressor assembly with rows of blades arranged to rotate in counter-opposite rotational directions, utilizing dual or singular rotational power sources and gear boxes with pinions to drive multiple compression stages, enhancing specific work and pressure ratios without the need for expensive materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional compression technologies are used for hydrogen gas, then the compressor can achieve compression function, but the specific work and pressure ratios are limited and costly metals are required
Solution Approach 1:
The patent applies counter-rotating blade rows where adjacent rows rotate in opposite directions, creating a unique flow pattern that enhances compression efficiency. This inverted approach to blade rotation resolves the technical contradiction by achieving high specific work without requiring expensive materials, as the counter-rotation mechanism itself generates the necessary compression forces through innovative blade angle configurations
Solution Approach 2:
The patent optimizes blade angles and rotational parameters to maximize specific work output. By carefully selecting and adjusting blade geometric parameters and rotational speeds, the system achieves high pressure ratios and specific work values without relying on costly metal alloys, thus resolving the contradiction between productivity and ease of manufacture
2Productivity
If traditional compression technologies are used for hydrogen gas, then the compressor can achieve compression function, but high pressure ratios and flow-capacity cannot be achieved efficiently
Solution Approach 1:
The compressor is divided into multiple stages with each stage containing counter-rotating blade rows. This segmentation allows the system to achieve high overall pressure ratios through cumulative compression effects while maintaining manageable complexity at each individual stage, as each stage operates independently with optimized blade configurations
Solution Approach 2:
The counter-rotation of adjacent blade rows creates an efficient compression mechanism that achieves high pressure ratios without requiring excessive numbers of stages. The opposite rotation directions generate synergistic compression effects that multiply pressure increases across stages, reducing the overall device complexity compared to traditional single-rotation compressors
3Productivity
If traditional compression technologies are used for hydrogen gas, then the compressor can achieve compression function, but compact footprint challenges arise
Solution Approach 1:
The counter-rotating blade rows are integrated within the same housing and share common structural support systems. This merging of opposing rotation mechanisms into a unified compact structure achieves high flow-capacity while minimizing the overall footprint, as the counter-rotation design allows for more efficient space utilization compared to traditional multi-compressor arrangements
Solution Approach 2:
The counter-rotation mechanism exploits the third dimension by having blade rows rotate in opposite directions within the same spatial envelope. This dimensional approach allows the compressor to achieve high flow-capacity without proportionally increasing the footprint area, as the vertical and radial dimensions are optimized to accommodate the counter-rotating components efficiently
Data Source
AI summary
A multi-stage compressor assembly is disclosed. Each of the stages of the compressor assembly has rows of blades arranged to rotate in counter-opposite directions, and this is effective to produce relatively high specific work, and high flow-capacity in a compact footprint at moderate blade tip speeds. In one non-limiting application, the compressor assembly can be utilized to compress a gas having a low-molecular weight and density, such as hydrogen.