Electrical Machine Cooling With Closed-Loop Heat Exchangers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional cooling systems for large electrical machines are inefficient and require external cooling media, such as water, which can be burdensome to install and may not be accessible in all situations, leading to poor performance and large heat exchanger dimensions.
Innovation Solution
A compact cooling system with a closed circuit between two heat exchangers, one inside and one outside the machine housing, using a pump to actively circulate a heat exchange medium and fans for air circulation, eliminating the need for external cooling media and reducing system size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cooling systems with external cooling media (water) are used, then cooling efficiency can be improved, but installation complexity and accessibility requirements worsen
Solution Approach 1:
The invention extracts the cooling function from external water-based systems and implements it using internal air circulation and heat exchangers integrated into the machine housing, eliminating the need for external water piping and cooling towers
Solution Approach 2:
The cooling system uses the machine's own air circulation capabilities and integrated heat exchangers to cool itself, making the system self-sufficient without requiring external cooling media or infrastructure
2Device complexity
If conventional air-to-air heat exchangers are used without active circulation, then system simplicity is improved, but cooling efficiency worsens
Solution Approach 1:
The invention introduces dynamic air circulation using fans to actively move air through the heat exchangers, transforming the static heat exchange process into a dynamic one that significantly improves cooling efficiency while maintaining relative system simplicity
Solution Approach 2:
The system uses pneumatic principles by employing fans to create forced air circulation through the heat exchanger channels, enabling efficient heat transfer without complex mechanical moving parts
3Ease of operation
If heat exchangers are integrated directly on the machine, then portability is improved, but heat transfer efficiency worsens due to space constraints
Solution Approach 1:
The heat exchangers are nested within or integrated into the machine housing structure, with air circulation paths carefully arranged to maximize heat transfer surface area within the constrained space, enabling both portability and efficient heat transfer
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 system provides efficient heat transfer and is independent of external cooling media, allowing for easy movement and installation without pipes, while improving cooling efficiency and reducing space requirements.
Implementation Method 1
The conduit assembly comprises a pump for actively circulating the heat exchange medium between the first and the second heat exchangers
Implementation Method 2
a first air circulating means configured to circulate air inside of the housing over the first heat exchanger
Implementation Method 3
a second air circulating means configured to circulate air outside of the housing over the second heat exchanger
Implementation Method 4
a first heat exchanger arranged inside of the housing, a second heat exchanger arranged outside of the housing
Data Source
AI summary
A cooling system for an electrical machine includes a substantially closed housing, a first heat exchanger arranged inside of the housing, a second heat exchanger arranged outside of the housing, a conduit assembly for transferring a heat exchange medium in a closed circuit between the first and the second heat exchangers, a first air circulating means configured to circulate air inside of the housing over the first heat exchanger, and a second air circulating means configured to circulate air outside of the housing over the second heat exchanger, wherein the conduit assembly includes a pump for actively circulating the heat exchange medium between the first and the second heat exchangers.