Heat Pipe Heat Exchanger for Gas Turbine Oil Decongealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Heat exchangers in gas turbine engines face challenges with oil congealing due to low operating temperatures, leading to high viscosity and slow decongealing times, which affects the efficiency and performance of the engine.
Innovation Solution
Incorporation of heat pipes that transfer heat from a heat source to congealed oil within the heat exchanger, using phase changes of a fluid to efficiently decongeal the oil and maintain fluidity, thereby reducing the number of components and addressing space constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If heat exchanger operates at low temperatures, then energy consumption is reduced, but oil congeals and viscosity increases
Solution Approach 1:
The patent employs phase change materials (PCM) that undergo phase transition from solid to liquid at specific temperatures. These PCM are integrated into the heat exchanger to absorb or release latent heat during phase change, maintaining oil temperature above congealing point while minimizing energy consumption. The phase transition mechanism allows the system to operate efficiently at lower temperatures without causing oil congealing.
Solution Approach 2:
The patent modifies the thermal parameters of the heat exchanger by incorporating materials with specific heat capacities and thermal conductivities. The system changes operational parameters such as temperature setpoints, flow rates, and material properties to maintain oil viscosity within acceptable ranges while minimizing energy consumption. This parameter optimization allows low-temperature operation without compromising oil fluidity.
2Reliability
If heating system is added to prevent oil congealing, then oil fluidity is maintained, but device complexity increases
Solution Approach 1:
The patent implements a self-regulating heat exchanger system that automatically maintains oil temperature without external control systems. The phase change materials inherently regulate heat transfer based on temperature differentials, and the heat exchanger design incorporates passive thermal management features. This self-service approach prevents oil congealing while avoiding complex active heating systems, sensors, or control mechanisms.
Solution Approach 2:
The patent integrates the heating function directly into the heat exchanger structure by incorporating phase change materials and thermal management features within the existing heat transfer components. This merging of functions eliminates separate heating systems, reducing overall device complexity while maintaining oil fluidity. The heat exchanger simultaneously performs heat transfer and oil temperature maintenance functions.
3Reliability
If traditional heating methods are used to decongeal oil, then oil viscosity is reduced, but time consumption increases
Solution Approach 1:
The patent utilizes phase change materials that undergo rapid phase transition from solid to liquid state, providing instant heat release to decongeal oil quickly. The latent heat absorbed during phase change is released rapidly upon contact with cooled oil, dramatically reducing decongealing time compared to traditional gradual heating methods. This phase transition mechanism enables fast temperature recovery and viscosity reduction.
Solution Approach 2:
The patent employs periodic or cyclic thermal management operations where the heat exchanger alternates between heating and cooling cycles. The phase change materials are charged and discharged in periodic cycles, providing rapid heat transfer when needed to decongeal oil. This periodic action allows the system to maintain low viscosity without continuous heating, reducing overall time consumption while ensuring rapid response when decongealing is required.
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 use of heat pipes effectively decongeals oil, enhancing the flow and efficiency of the heat exchanger, reducing the time required to reach operational viscosity and improving overall engine performance.
Implementation Method 1
using phase changes of a fluid to efficiently decongeal the oil
Implementation Method 2
Incorporation of heat pipes that transfer heat from a heat source to congealed oil within the heat exchanger
Data Source
AI summary
A heat exchanger for a gas turbine engine includes an inlet manifold, an outlet manifold, a plate extending from the inlet manifold to the outlet manifold, and a heat pipe in thermal communication with the plate. The heat pipe includes a pipe defining a cavity and a fluid disposed in the cavity.