Supercritical Cryogen Floatation Device for Deep-Sea Recovery
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Solution Overview
Problem
Existing floatation devices struggle to operate effectively at extreme depths and pressures, such as those exceeding 300m, where liquefied gases cannot vaporize due to high pressures and low temperatures, limiting their ability to raise or lower items from the seabed.
Innovation Solution
A floatation device featuring a buoyancy chamber, cryogen reservoir, and heating pipe with a microprocessor and sensors, allowing the cryogen to transition into a supercritical state, enabling operation at depths of up to 2000m, with a reinforced housing and pressure-balancing mechanisms to prevent damage from pressure imbalances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a floatation device uses liquefied gas that vaporizes to create buoyancy, then it can raise items from the seabed, but it cannot operate at extreme depths exceeding 300m where the gas cannot vaporize due to high pressure and low temperature
Solution Approach 1:
The patent changes the physical state parameter of the cryogenic fluid from liquid/gas phase to supercritical phase by adjusting temperature and pressure parameters. This allows the fluid to maintain buoyancy properties at extreme depths where conventional vaporization cannot occur, thereby extending depth adaptability while maintaining operational reliability
Solution Approach 2:
The floatation device is designed to function across a universal range of depths from shallow to extreme depths (up to 2000m). The supercritical fluid mechanism serves multiple functions: it provides buoyancy at shallow depths, maintains operational capability at intermediate depths, and enables operation at extreme depths where conventional devices fail, thereby achieving depth universality
2Adaptability or versatility
If the device operates at extreme depths of 2000m with pressures of 200 Bar, then it can access deeper seabed locations, but the pressure differential could cause uncontrolled rapid ascent and damage the housing
Solution Approach 1:
The patent implements beforehand cushioning through pressure equalization mechanisms and controlled ascent protocols. Pressure equalization ports and valves are designed to gradually equalize pressure differentials before they become critical, cushioning the housing against sudden pressure shocks during ascent and preventing structural damage while maintaining deep operating capability
Solution Approach 2:
The device employs dynamic pressure management systems that actively adjust to changing depth and pressure conditions. Movable pressure equalization ports, adjustable valves, and controlled fluid release mechanisms allow the housing to dynamically adapt to pressure differentials, maintaining structural integrity during depth transitions while enabling access to extreme depths
3Reliability
If the cryogen reservoir is made robust with reinforcement to withstand 200 Bar pressure at 2000m depth, then it can operate at extreme depths, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent employs composite materials for the cryogen reservoir construction, combining materials with complementary properties to withstand extreme pressure while managing complexity. The reinforced housing uses composite structures that provide necessary pressure resistance at 200 Bar while optimizing the balance between strength and manufacturability, avoiding overly complex designs
4Reliability
If the buoyancy chamber is subdivided into multiple compartments with diaphragms, then redundancy is increased and reliability improves, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the buoyancy chamber into multiple independent compartments separated by diaphragms. This segmentation provides redundancy so that if one compartment fails, others can maintain buoyancy function, thereby improving reliability while keeping each individual compartment relatively simple in design
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
Enables reliable operation at extreme depths by maintaining fluid in a supercritical state, ensuring stable buoyancy and safe pressure management, allowing for the efficient raising and lowering of heavy loads from the seabed.
Implementation Method 1
The heating pipe may be routed through the housing so that at least a portion of the heating pipe is adjacent an outer surface of the housing. This enables the heating of the cryogenic fluid by extracting heat from the surrounding sea water.
Implementation Method 2
The device may further comprise a plurality of heat conductors configured to introduce heat into the cryogen reservoir. The heat conductors also enable heat from the surrounding sea water to be introduced into the device, in this case into the cryogen reservoir directly.
Implementation Method 3
The floatation device comprises a buoyancy chamber; a cryogen reservoir; a heating pipe providing switchable fluid communication between the cryogen reservoir and the buoyancy chamber
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
A floatation device (100) is provided comprising a buoyancy chamber (110); a cryogen reservoir (210); and a heating pipe (310) providing switchable fluid communication between the cryogen reservoir (210) and the buoyancy chamber (110). A method of raising an item from the seabed is also provided. The method comprising the steps of lowering a floatation device (100) to the seabed; attaching the floatation device (100) to the item to be raised; creating a supercritical fluid within a portion of the floatation device (100); and allowing the floatation device (100) and the item to rise to the surface using the buoyancy of the supercritical fluid to raise the item to the surface.