Submerged Venturi Dissolver for Aquaculture Oxygenation
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Solution Overview
Problem
Existing oxygen dissolving systems in aquaculture face challenges in maintaining high oxygen levels, especially at elevated temperatures, and are inefficient in water utilization and energy consumption, leading to reduced fish health and growth rates due to limited water capacity and energy-intensive processes.
Innovation Solution
A submerged venturi dissolver combined with a submerged pump and an outlet device forms a sealed, watertight unit that dissolves pressurized oxygen into water, distributing oxygenated water directly into sea cages, tanks, or ponds, reducing energy consumption and enhancing oxygen levels while being easy to install and remove.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If pressurized oxygen dissolvers are used to increase oxygen levels in water, then oxygen dissolution capacity is improved, but energy consumption increases significantly
Solution Approach 1:
The patent employs a venturi-based hydraulic system where water flow itself creates the suction force to draw oxygen into the water stream. The venturi effect generates a pressure difference that pulls oxygen through a diffuser into the high-velocity water flow, eliminating the need for separate pressurization pumps and reducing energy consumption while maintaining effective oxygen dissolution.
Solution Approach 2:
The system changes the physical parameters of water flow by creating a high-velocity jet through the venturi structure. This high velocity increases the mixing intensity and dissolution rate of oxygen in water without requiring high pressure, thereby achieving effective oxygenation with lower energy input compared to traditional pressurized systems.
2Quantity of substance
If oxygen dissolvers operate at high pressure to dissolve more oxygen, then oxygen dissolution capacity is improved, but pressure loss increases
Solution Approach 1:
The venturi-based hydraulic system converts pressure energy into kinetic energy, creating a high-velocity water stream that draws oxygen in through the venturi effect. The system operates at low pressure by utilizing the kinetic energy of flowing water to achieve oxygen dissolution, thereby avoiding the pressure losses associated with high-pressure pump-based systems.
3Productivity
If water flow rate is increased to improve oxygen dissolution, then oxygen transfer efficiency is improved, but water capacity utilization decreases
Solution Approach 1:
The system enhances oxygen dissolution by changing the flow regime to high-velocity turbulent flow through the venturi structure. This increases the interfacial area and mass transfer coefficient, improving oxygen transfer efficiency without requiring a proportional increase in total water volume, thus maintaining better water capacity utilization.
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
This solution effectively increases oxygen levels, reduces fish mortality and stress, improves growth rates, and simplifies handling during treatments, while being energy-efficient and easy to control, thereby enhancing fish welfare and water utilization.
Implementation Method 1
The known venturi system generates micro bubbles in the water. By the means of gas diffusion and redistribution of dissolved gas components in water one can dissolve and add gas at a very low pressure
Implementation Method 2
By the means of gas diffusion and redistribution of dissolved gas components in water one can dissolve and add gas at a very low pressure
Implementation Method 3
The invention proposes the use of a submerged pump
Data Source
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AI summary
The invention relates to a device for supplying gas into water in sea cages, tanks or ponds with a pump (1) and a dissolver (2) for contacting the gas with the water. For higher efficiency and better handling the pump (1) is a submerged pump (1) (Fig. 1).