Transformer Heat Exchanger Cooling With Remote Impeller Airflow
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Solution Overview
Problem
Current cooling solutions for power transformers, such as standard fans, face challenges including complexity, poor scalability, high noise levels, maintenance difficulties, and security risks, while being weather-sensitive and heavy.
Innovation Solution
A cooling arrangement utilizing an impeller-motor device, fluid pipe, and fluid discharge device, where the impeller-motor device is housed at a distance from the fluid discharge device, employing the Bernoulli principle to amplify airflow by 10 to 50 times, reducing noise and increasing efficiency, and using a funnel to enhance fluid flow directionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If standard fans are used for cooling, then cooling airflow rate is provided, but device complexity increases due to motor, blades, and electrical cables
Solution Approach 1:
The patent extracts the motor component from the fan assembly, placing it in a separate housing away from the fluid discharge device. This separation eliminates the need for complex blade-motor-cage integration and reduces electrical cable requirements, while maintaining cooling airflow rate through the impeller-motor device's direct fluid coupling
Solution Approach 2:
The cooling system is segmented into distinct functional modules: the impeller-motor device housed separately in a housing, connected via fluid pipes to the fluid discharge device. This segmentation simplifies each component's design and reduces overall system complexity while preserving cooling effectiveness
2Quantity of substance
If fan blade size is increased to improve cooling, then cooling airflow rate increases, but moment of inertia increases quadratically
Solution Approach 1:
The patent replaces the traditional mechanical fan blade system with an impeller-motor device that generates fluid flow through a different mechanical principle. The impeller design achieves high cooling airflow rates without the quadratic moment of inertia penalty associated with large fan blades, as the impeller operates at lower rotational inertia
3Quantity of substance
If standard fans are used for cooling, then cooling function is provided, but noise level increases to around 70 dB
Solution Approach 1:
The motor is extracted and housed separately from the fluid discharge device, isolating the noise-generating component away from the cooling airflow path. This separation reduces noise propagation to the surrounding environment while maintaining the required cooling airflow rate through the fluid pipe connection
4Quantity of substance
If fans are used for cooling, then cooling airflow is provided, but maintenance becomes difficult and time consuming
Solution Approach 1:
The motor and impeller assembly is extracted and housed in a separate, accessible housing located away from the fluid discharge device. This extraction enables easy maintenance and repair of the motor components without disturbing the fluid discharge system, significantly improving maintenance accessibility while preserving cooling functionality
5Quantity of substance
If standard fans are used for cooling, then cooling function is provided, but security risks increase due to easy sabotage
Solution Approach 1:
The motor is housed in a separate, secured housing away from the fluid discharge device and cooling system. This physical separation and isolated housing make the motor less accessible and more difficult to sabotage, thereby improving security resistance while maintaining cooling airflow rate through the protected fluid pipe connection
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 provides a powerful and efficient cooling solution with reduced noise, simplified maintenance, and enhanced scalability, while being lightweight and resistant to environmental factors, effectively addressing the limitations of traditional fan-based cooling systems.
Implementation Method 1
employing the Bernoulli principle to amplify airflow by 10 to 50 times
Implementation Method 2
using a funnel to enhance fluid flow directionality
Implementation Method 3
forced cooling is needed for this operation
Data Source
AI summary
A cooling arrangement for cooling at least one OAEHE in a transformer. The cooling arrangement includes at least one impeller-motor device, at least one fluid pipe at least one fluid discharge device. The at least one impeller-motor device is adapted to supply a fluid to the inlet of the at least one fluid discharge device via the at least one fluid pipe and cause the fluid to flow through the at least one fluid discharge device and be discharged through the at least one fluid outlet of the at least one fluid discharge device. The cooling arrangement further comprises includes a funnel. The at least one impeller-motor device is located in a housing at a distance of at least 3 meters from the at least one fluid discharge device.