Liquid Gas Pipe Cooling Using Expansion and Vaporization
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Solution Overview
Problem
Existing systems for transporting and storing liquid gases require external energy for cooling, which increases costs and complexity, and are not effectively designed for passive cooling, especially in uninsulated pipelines and fittings.
Innovation Solution
A system with an inner transport pipe surrounded by an insulated outer wall, featuring multiple openings for the liquefied gas to expand into a second chamber, allowing vaporization and passive cooling without external energy input, combined with strategically placed spacing elements and a connection piece for gas utilization, and optionally equipped with sensors and thermally conductive materials for enhanced control and monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If external cooling energy is used to maintain liquid gas temperature, then the liquid gas can be kept in liquid state, but energy consumption and system complexity increase
Solution Approach 1:
The system uses the liquid gas itself to cool the system through controlled evaporation. The liquid gas expands through openings into the second chamber where it evaporates, using its own heat of vaporization to cool the first chamber and maintain its liquid state without external cooling energy.
Solution Approach 2:
The system exploits the phase transition of liquid gas to gas through controlled evaporation in the second chamber. This phase change absorbs heat (heat of vaporization) from the first chamber, providing passive cooling to maintain the liquid gas in its liquid state during transport.
2Loss of energy
If multiple openings are provided for liquid gas expansion, then passive cooling efficiency improves, but manufacturing complexity increases
Solution Approach 1:
The inner wall is divided into multiple segments with openings distributed throughout its surface. This segmentation allows the liquid gas to expand at multiple locations simultaneously, improving heat removal efficiency across the entire first chamber while using simple cylindrical geometry that is easy to manufacture.
Solution Approach 2:
Openings are distributed at different locations on the inner wall to create local cooling zones throughout the first chamber. Each opening provides localized evaporation and cooling, ensuring uniform temperature distribution and efficient heat removal from different regions of the liquid gas.
3Stability of the object's composition
If spacing elements are added to ensure uniform chamber spacing, then cooling uniformity improves, but device complexity increases
Solution Approach 1:
The spacing function is segmented into multiple discrete spacing elements distributed along the inner wall. Each spacing element maintains uniform distance between the inner and outer walls at its location, ensuring consistent annular chamber geometry and uniform cooling distribution without requiring complex overall结构设计.
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 maintains liquid gases in a stable state without external cooling, utilizing the heat of vaporization for passive cooling, reducing energy expenditure and implementation costs while allowing for efficient monitoring and utilization of the gas.
Implementation Method 1
the liquefied gas vaporizes and removes the heat of vaporization from the system
Implementation Method 2
removes the heat of vaporization from the system. As a result, the system, in particular the liquefied gas within the inner wall, is cooled
Implementation Method 3
the outer wall is preferably of insulated design, wherein the insulation meets the requirements of extreme low temperatures
Data Source
AI summary
A system includes having an inner wall and an outer wall. The inner wall encloses a liquid gas in a first chamber. A second chamber is formed between the inner wall and the outer wall. The inner wall has at least one opening configured to expand the liquid gas into the second chamber.