Compressor Heat Shield Thermal Barrier Design
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Solution Overview
Problem
Compact compressors with high compression ratios face heat management issues, leading to reduced operational lifetimes and performance due to excessive heat generation, which conventional cooling methods fail to adequately address.
Innovation Solution
A heat shield is integrated into the compressor design to prevent direct contact between the compressed process fluid and the casing, utilizing a thermal barrier that directs the heated fluid away from critical components and incorporates a cooling gap to manage temperature, thereby reducing heat transfer and extending component lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high compression ratios are used to increase production, then productivity increases, but heat generation increases causing reduced reliability
Solution Approach 1:
A heat shield is introduced as an intermediary component between the process fluid and the compressor casing. The heat shield includes a cooling gap that allows cooling fluid to flow through, creating a thermal barrier that protects critical components from excessive heat while enabling high compression ratios to be maintained for increased production.
2Temperature
If conventional cooling methods are used to manage heat, then temperature control is attempted, but heat management becomes insufficient at high compression ratios
Solution Approach 1:
The cooling system is segmented into distinct regions: a cooling gap formed between the heat shield and the compressor casing, and a fluid pathway integrated into the heat shield. This segmentation allows cooling fluid to be directed precisely to areas of highest thermal stress, providing effective heat management even at high compression ratios of 10:1 or greater.
3Device complexity
If compact compressor design is implemented to reduce space, then device size decreases, but heat dissipation becomes more difficult
Solution Approach 1:
The heat shield is nested within the compressor casing, and the cooling gap is nested within the structural components of the compressor. The cooling fluid pathway is integrated within the heat shield structure itself. This nested arrangement provides effective heat dissipation capabilities within the compact compressor footprint without requiring additional external cooling systems.
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 heat shield effectively mitigates heat-related stress on compressor components, enhancing operational reliability and extending the lifespan of critical seals and bearings by maintaining a controlled temperature environment, even at high compression ratios.
Implementation Method 1
A heat shield is integrated into the compressor design to prevent direct contact between the compressed process fluid and the casing, utilizing a thermal barrier that directs the heated fluid away from critical components
Implementation Method 2
incorporates a cooling gap to manage temperature, thereby reducing heat transfer and extending component lifespan
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
A compressor may include a casing defining a discharge cavity and a seal cavity. A rotary shaft may be disposed in the casing, and a shaft seal assembly may be disposed in the seal cavity and about the rotary shaft. An impeller may be coupled with and configured to be driven by the rotary shaft. A balance piston may be integral with the impeller and may define the discharge cavity and the seal cavity. A balance piston seal may be disposed about the balance piston such that the balance piston seal and the balance piston define a radial clearance therebetween. The radial clearance may be configured to provide fluid communication from the impeller to the discharge cavity. A heat shield may be disposed in the discharge cavity, and may be configured to prevent the conduction of heat from the discharge cavity to the seal cavity via the casing.