Shielded Exhaust Duct for Package Fluid Machine Cooling
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Solution Overview
Problem
In package type fluid machines, the cooling performance deteriorates when compressor bodies are stacked, as cooling air from one compressor can block or backflow into others, affecting performance and reliability due to differential pressure and varying operating conditions.
Innovation Solution
Incorporating shielding plates within the exhaust duct to separate and direct cooling air flows between aftercoolers, preventing backflow and ensuring consistent cooling performance across different operating conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If multiple compressor bodies are stacked in a package type fluid machine, then space is saved and compactness is improved, but cooling performance deteriorates due to flow blockage and backflow between compressors
Solution Approach 1:
The invention divides the common exhaust passage into multiple independent exhaust passages by introducing partition walls. Each partition wall corresponds to a specific compressor body and segments the flow path, preventing cooling air from one compressor from interfering with other compressors. This segmentation maintains compact packaging while ensuring reliable cooling for each compressor unit.
Solution Approach 2:
Partition walls are introduced as intermediary structures within the exhaust passage. These partition walls act as mediators that separate cooling air flows from different compressors, preventing direct interaction between the flows. The partition walls ensure that cooling air from each compressor remains confined to its designated path, resolving the flow interference problem while maintaining the compact package structure.
2Device complexity
If a single exhaust passage is used for multiple compressor bodies, then device complexity is reduced, but temperature distribution becomes uneven and performance varies
Solution Approach 1:
The invention segments the unified exhaust passage into multiple independent passages using partition walls. Each segmented passage is dedicated to a specific compressor body, ensuring that cooling air flows independently without mixing. This segmentation creates uniform temperature distribution for each compressor while maintaining relatively simple overall structure through the modular partition wall design.
3Adaptability or versatility
If compressor bodies operate under different conditions, then adaptability is improved, but cooling air flow direction and amount vary causing performance instability
Solution Approach 1:
The partition walls segment the exhaust passage into independent channels, ensuring that cooling air from each compressor follows its own dedicated path. This segmentation isolates the cooling flows, so that variations in operating conditions of individual compressors do not affect the cooling performance of other compressors. Each compressor maintains stable cooling performance regardless of the operating state of others.
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
Stabilizes cooling performance by preventing interference between cooling air flows from different compressor bodies, reducing temperature increases and enhancing the reliability and efficiency of the fluid machine units.
Implementation Method 1
a shield that is disposed between the aftercoolers to shield a flow of the cooling gas
Implementation Method 2
a plurality of aftercoolers that are disposed inside the exhaust duct to cool a compressed fluid from the compressor bodies
Data Source
AI summary
A package type fluid machine includes a plurality of compressor bodies; a machine compartment in which the plurality of compressor bodies are disposed; an exhaust duct that exhausts a cooling gas from the machine compartment; a plurality of aftercoolers that are disposed inside the exhaust duct to cool a compressed fluid from the compressor bodies; and a shield that is disposed between the aftercoolers to shield a flow of the cooling gas.