Modular Generator Cooling Module for Space-Limited Wind Turbines
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Solution Overview
Problem
Modern commercial-scale wind turbines face challenges in cooling their generators due to limited space in the nacelle, where high currents generate significant thermal energy, and existing cooling systems are cumbersome, complicating maintenance and space allocation.
Innovation Solution
A modular environmental conditioning module is attached to the stator support frame, featuring a heat exchanger and air mover, allowing for independent sub-assembly and easy maintenance, forming a closed-loop cooling system that optimizes airflow and reduces space requirements, with a centrifugal fan and electric motor for efficient cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heat exchangers are integrated within the generator or generator housing, then cooling effectiveness is improved, but maintenance complexity increases and access becomes limited
Solution Approach 1:
The cooling system is divided into separable modules: the heat exchanger can be removed from the generator housing as an independent component, allowing maintenance personnel to service the heat exchanger without disassembling the entire generator. This segmentation maintains effective cooling while improving maintenance accessibility.
2Ease of repair
If heat exchangers are located away from the generator and connected by ducting, then maintenance access is improved, but space requirements increase and nacelle architecture is compromised
Solution Approach 1:
The heat exchanger is positioned within the generator housing structure, utilizing the existing spatial envelope of the generator. This nested arrangement provides maintenance access comparable to external placement while minimizing additional space requirements in the nacelle, as the heat exchanger occupies space already allocated to the generator assembly.
3Reliability
If the entire heat exchanger must be disassembled to service a single component, then cooling integrity is maintained, but maintenance time and complexity increase
Solution Approach 1:
The heat exchanger is designed as a self-contained module that can be removed and replaced as a single unit. This allows individual heat exchanger components to be serviced or replaced without affecting the generator's cooling integrity, as the modular design maintains sealed connections when properly installed, while dramatically reducing maintenance time compared to full disassembly.
4Temperature
If more space is allocated to cooling systems in the nacelle, then cooling capacity is improved, but space for other components is reduced
Solution Approach 1:
The cooling system components (heat exchanger, ducting, and associated structures) are merged with the generator housing structure. The heat exchanger utilizes the generator housing as its mounting structure and thermal pathway, eliminating the need for separate dedicated cooling system space. This integration achieves adequate cooling capacity while preserving nacelle space for other components.
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 modular cooling system effectively manages thermal energy within the generator, enhancing cooling efficiency, reducing space needs, and simplifying maintenance by allowing independent servicing of components without disassembling the entire generator.
Implementation Method 1
The environmental conditioning module comprises a heat exchanger and an air mover supported by a module housing
Implementation Method 2
an air mover supported by a module housing... The air mover may comprise a fan. The fan may be a centrifugal fan arranged within the module housing
Data Source
AI summary
In a first aspect of the invention there is provided a generator for a wind turbine defining a central generator axis. The generator includes a stator support frame and an environmental conditioning module removably attached to the stator support frame. The environmental conditioning module includes a heat exchanger and an air mover supported by a module housing. The environmental conditioning module further includes fluid interface connections associated with the heat exchanger, the fluid interface connections being releasably connectable to a fluid supply system associated with the heat exchanger, and electrical interface connections associated with the air blower, the electrical interface connections being releasably connectable to an electrical supply system associated with the air mover.