Wind Turbine Cooling via Tower Pressure Differential
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Solution Overview
Problem
Conventional wind turbine generators face challenges in cooling heat-generating electrical equipment due to complex and power-consuming cooling systems, which increase the size, weight, and cost of the nacelle and tower, and require additional structural reinforcement to protect against corrosion, especially in coastal or sea installations.
Innovation Solution
A wind turbine generator design that utilizes a pressure difference between an introducing vent and an exhaust vent on the tower or nacelle to circulate external wind for cooling, eliminating the need for a ventilating fan and simplifying the cooling configuration, while maximizing cooling efficiency and minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a ventilating fan is installed to cool heat-generating electrical equipment, then cooling effectiveness is improved, but device complexity and power consumption increase
Solution Approach 1:
The invention extracts and utilizes the natural wind resource from the external environment, removing the need for mechanical ventilation equipment. The tower structure itself is designed with wind-introducing openings that directly channel external wind to the electrical equipment, eliminating the ventilating fan and its associated complexity
Solution Approach 2:
The cooling system utilizes free external wind resources to cool the electrical equipment without requiring additional energy input. The tower structure serves dual purposes: structural support and wind channeling, making the system self-sufficient for cooling without external power consumption
2Temperature
If cooling liquid is circulated through heat-generating equipment, then cooling effectiveness is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The invention removes the complex liquid cooling system including circulation pumps, heat exchangers, and cooling towers, replacing it with direct air cooling through the tower structure. This extraction of unnecessary components significantly reduces manufacturing cost and complexity
Solution Approach 2:
The invention replaces the mechanical liquid circulation system with a passive air flow system utilizing natural wind. The cooling function is achieved through direct convection with external air, eliminating mechanical pumps and heat exchangers
3Temperature
If a heat exchanger is installed for cooling, then cooling effectiveness is improved, but nacelle size and weight increase
Solution Approach 1:
The invention removes the heat exchanger from the nacelle by utilizing the tower structure as the cooling interface. External wind is channeled through the tower directly to the electrical equipment, eliminating the need for heat exchanger components within the nacelle and reducing its volume
Solution Approach 2:
The cooling function is moved from the three-dimensional nacelle space to the vertical tower dimension. By utilizing the tower's height and external surface area for wind intake, the nacelle internal volume is freed from heat exchanger installations
4Temperature
If heat exchanger is exposed to external air for cooling, then cooling effectiveness is improved, but corrosion protection requirements and building cost increase
Solution Approach 1:
The invention extracts the heat exchanger from the external environment and replaces it with direct air cooling through the tower structure. The electrical equipment is cooled by external wind channeled through the tower, eliminating exposed heat exchanger surfaces that would be subject to coastal corrosion
Solution Approach 2:
The tower structure serves as an intermediary that channels external wind to the electrical equipment without exposing sensitive components to the external environment. The tower acts as a protected conduit, delivering cooling air while shielding the electrical equipment from direct exposure to corrosive external conditions
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 design effectively cools heat-generating equipment within the wind turbine generator using external wind without power consumption, reducing structural complexity and costs, and maintaining efficient cooling regardless of wind direction.
Implementation Method 1
an introducing vent that takes the external wind into an internal space in the wind turbine generator is provided at a portion of an outer circumference surface of the tower or the nacelle that receives positive pressure due to the external wind; and an exhaust vent that externally exhausts cooling air in the internal space is provided at a portion of an outer circumference surface of the tower or the nacelle that receives the negative pressure due to the external wind
Data Source
AI summary
With a simple and low-cost structure, it is possible to introduce a sufficient amount of external wind while suppressing power consumption, and thereby, inside a nacelle and a tower are satisfactorily cooled. A wind turbine generator, in which a rotor head generates power by driving a generator installed inside a nacelle and in which the nacelle is installed at a top end of a tower, wherein an introducing vent that takes the external wind into an internal space in the wind turbine generator is provided at a portion of an outer circumference surface of the tower or the nacelle that receives positive pressure due to the external wind; and an exhaust vent that externally exhausts cooling air in the internal space is provided at a portion of an outer circumference surface of the tower or the nacelle that receives the negative pressure due to the external wind.