Solar automatic heat collecting and equalizing tube, automatic heat equalizing trough-type module, solar-thermal complementary power generation system comprising the same, and power generation method using the same
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Solution Overview
Problem
Trough solar thermal power generation systems face instability due to weather dependence and are prone to tube bursting when filled with water, as large temperature differences cause internal stress.
Innovation Solution
A solar automatic heat equalizing and collecting tube with a spiral baffle inside the absorption tube, which tumbles fluid up and down to equalize temperatures, preventing bursting and allowing water to be used directly without issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If water is filled in the absorption tube to enable direct solar heating, then the system can operate with water as working medium, but large temperature differences cause internal stress and tube bursting
Solution Approach 1:
The patent introduces a baffle structure that creates dynamic fluid circulation within the absorption tube. The baffle forces the water to flow in a specific pattern, ensuring continuous movement and heat distribution throughout the tube, preventing localized overheating and temperature differentials that would cause stress and bursting
Solution Approach 2:
The baffle acts as an intermediary element between the solar radiation and the water. It mediates the heat transfer process by creating turbulence and ensuring uniform heat distribution, preventing direct localized heating that would cause thermal stress
2Stability of the object's composition
If conduction oil or melted salt is used to equalize temperature, then thermal energy storage is improved, but system complexity and operating temperature requirements increase
Solution Approach 1:
The patent enables the water itself to perform the temperature equalization function through the baffle-induced circulation. The system uses its own working medium (water) to achieve thermal management, eliminating the need for separate conduction oil or melted salt systems, thereby reducing complexity while maintaining thermal stability
Solution Approach 2:
The patent changes the flow regime parameter of water from static to dynamic circulation. By inducing continuous movement through the baffle structure, water's thermal properties are optimized for both heat absorption and distribution, achieving temperature equalization without requiring phase change materials or additional thermal fluids
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 provides stable and continuous power generation, including on cloudy or rainy days, by ensuring thermal equalization within the tube, preventing bursting and maintaining efficiency with water as the working medium.
Implementation Method 1
the baffle is disposed in an inner cavity of the absorption tube and is configured to drive a fluid in the absorption tube to tumble up and down alternately
Implementation Method 2
the good heat conductivity of the liquid medium can quickly equalize the temperature of the absorption tube
Implementation Method 3
the absorption tube is coated with a heat absorption layer
Implementation Method 4
the solar energy concentrated by the trough reflector always heats the side of the evacuated solar collector tube
Implementation Method 5
a space between the glass tube 1b2 and the absorption tube 1b3 is vacuum
Implementation Method 6
The space between the glass tube and the absorption tube is vacuum
Implementation Method 7
the solar energy concentrated by the trough reflector always heats the side of the evacuated solar collector tube
Implementation Method 8
an evacuated solar collector tube disposed at the focal point of the parabolic trough reflector
Data Source
AI summary
A solar automatic heat collecting and equalizing tube, including: a glass tube, an absorption tube, and a baffle. The glass tube is sleeved on the absorption tube. The absorption tube is coated with a heat absorption layer. The space between the glass tube and the absorption tube is vacuum. The baffle is disposed in the inner cavity of the absorption tube and is configured to drive a fluid in the absorption tube to tumble up and down alternately. The baffle is spiral in shape and fixed in the absorption tube.