Sealed Nacelle Cooling System for Coastal Wind Turbines
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wind turbine nacelles in coastal environments face heat loss issues due to energy conversion and gear friction, and existing cooling methods can damage equipment with external salt exposure, leading to corrosion and reduced efficiency.
Innovation Solution
A nacelle cooling system with cooling blocks surrounding heat-generating devices, a passage pipe for coolant flow, a primary heat exchanger on the outer surface, and a secondary heat exchanger using a heat transfer medium and fan to discharge heat externally, while sealing the nacelle from salt and using a combination of water-cooling and air-cooling methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If external air is introduced into the nacelle for cooling, then cooling efficiency is improved, but salt exposure causes corrosion and equipment damage
Solution Approach 1:
The cooling system is divided into separate sealed cooling circuits for different heat-generating devices (generator, gearbox, inverter), each with its own cooling blocks and passage pipes. This segmentation allows independent cooling of each component while maintaining the sealed nacelle environment, preventing salt corrosion while achieving effective cooling.
Solution Approach 2:
Cooling blocks are introduced as intermediary heat transfer components that contact the heat-generating devices internally, while coolant flows through sealed passage pipes. This intermediary structure enables heat removal from internal components without requiring direct exposure to external salt-laden air, thus preventing corrosion while maintaining cooling efficiency.
2Reliability
If the nacelle is sealed to prevent salt corrosion, then equipment reliability is improved, but heat dissipation becomes less efficient
Solution Approach 1:
The patent employs hydraulic cooling systems with coolant circulating through sealed passage pipes and cooling blocks. This hydraulic approach enables efficient heat transfer from internal components to the coolant, maintaining effective heat dissipation while the sealed nacelle prevents salt corrosion, thus resolving the contradiction between reliability and thermal management.
Solution Approach 2:
The cooling system utilizes changes in coolant parameters (temperature, pressure, flow rate) to efficiently remove heat from the sealed nacelle. By controlling these parameters, the system achieves effective heat dissipation while maintaining the sealed environment that protects against corrosion, thus resolving the contradiction between reliability and thermal management.
3Productivity
If multiple heat generating devices are cooled simultaneously, then overall system efficiency is improved, but system complexity increases
Solution Approach 1:
The cooling blocks serve multiple functions: they directly contact heat-generating devices for heat absorption, provide structural support, and act as mounting points for passage pipes. This multi-functionality reduces the need for separate cooling components for each device, thereby cooling multiple heat-generating devices simultaneously while limiting the increase in overall system complexity.
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 effectively seals the nacelle from external salt, preventing corrosion and ensuring efficient cooling of heat-generating components, enhancing the overall performance and longevity of wind turbine components in coastal environments.
Implementation Method 1
The primary heat exchanger may perform a heat exchange process between the coolant flowing through the passage pipe and air
Implementation Method 2
the secondary heat exchanger may include a duct, a heat generating member, and a heat transfer medium, the heat transfer medium discharging internal heat of the nacelle to the outside using a refrigerant which is contained therein
Implementation Method 3
The heat transfer medium may be a heat pipe
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Provided is a nacelle cooling system of a wind turbine. The disclosed nacelle cooling system of a wind turbine comprises cooling blocks which are arranged in order to respectively surround one or more heating devices installed inside a nacelle, a passage pipe line which is connected to the cooling blocks for coolant to flow, a primary heat exchanger which is connected to the passage pipe line and arranged on the outer lateral surface of the nacelle, and a secondary heat exchanger which is capable of absorbing heat generated inside the nacelle and discharging the heat. The nacelles of the primary and secondary heat exchangers are sealed from the outside. Therefore, when the nacelle of the wind turbine is operated in a coastal environment, the present invention can prevent performance of turbine facilities from lowering caused by erosion because the nacelle is completely sealed from external salt.