Dual-Condenser Heat Pipe Reactor Layout for Decay Heat Removal
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Solution Overview
Problem
Conventional heat pipe reactors have limitations in heat transfer efficiency and require improvements in power distribution and decay heat removal, particularly in nuclear reactors.
Innovation Solution
The implementation of a dual condenser heat pipe configuration with heat exchangers on both sides of the reactor core, allowing for asymmetric heat transfer and the use of decay heat exchangers to manage radioactive decay heat, enhancing power throughput and reducing the number of required heat pipes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional single condenser heat pipe configuration is used, then device complexity is reduced, but heat transfer capacity and power throughput are limited
Solution Approach 1:
The heat pipe system is segmented into multiple independent heat pipes, each with its own condenser and evaporator sections. This segmentation allows parallel heat transfer paths, increasing total heat transfer capacity while maintaining manageable individual component complexity
Solution Approach 2:
The system transitions from a single linear heat pipe configuration to a two-dimensional array of heat pipes with condensers positioned at multiple locations (front and rear). This dimensional expansion multiplies the heat transfer capacity without proportionally increasing operational complexity
2Productivity
If heat exchangers are placed on both sides of reactor core, then heat transfer efficiency increases, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The heat pipe design incorporates universal components that can function in multiple positions and orientations. The same heat pipe structure serves both front and rear condenser configurations, allowing standardized manufacturing while achieving enhanced power throughput through dual-sided heat exchanger placement
Solution Approach 2:
The system utilizes parameter changes in the heat pipe design, such as adjustable working fluid types and variable condenser surface areas, to optimize performance for different operational requirements. This flexibility allows the same basic design to achieve high power throughput without requiring completely different manufacturing processes
3Reliability
If decay heat exchanger is added to remove radioactive decay heat, then reactor safety and reliability improve, but device complexity increases
Solution Approach 1:
The heat exchanger system is designed with multi-functionality, where the same heat exchangers and heat pipes used for normal operational cooling also serve as decay heat removal systems. This universal design provides reliable decay heat management without adding separate dedicated systems, thereby improving reliability while controlling device complexity
Solution Approach 2:
The passive heat pipe design enables self-service cooling functionality, where the heat transfer system automatically responds to thermal loads including decay heat without requiring active control mechanisms. The heat pipes naturally redirect cooling capacity to where it is needed most, providing reliable decay heat removal through inherent system behavior rather than complex controlled systems
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 dual condenser configuration increases heat transfer capacity by up to a factor of four, doubles the sonic and entrainment limits, and effectively manages decay heat, improving reactor efficiency and reducing pipe requirements.
Implementation Method 1
Heat pipe reactors are cooled with an array of heat pipes. The array of heat pipes each have a condenser and project from one side of the reactor core.
Implementation Method 2
heat pipe 102 within reactor 100 is partially filled with alkali metal, such as potassium, sodium, or lithium. Typically, heat is added to heat pipe 102 at one end 104, and transferred to a heat exchanger
Data Source
AI summary
A heat pipe reactor may include a heat pipe array with a reactor core at any distance along the length of the heat pipe array. Heat exchangers may be placed on both sides of reactor core. The heat pipe array may also be attached to one or more decay or similar heat exchangers placed near one or both sides of the reactor core, allowing heat removal following shutdown.