Vertical Solar Distillation Reactor for Continuous Desalination
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Solution Overview
Problem
Existing solar distillation systems face limitations in efficiency and scalability due to reliance on direct solar heating, susceptibility to mineral buildup, and complexity in separating raw feed from concentrated liquids, which hinders continuous production and increases costs.
Innovation Solution
A vertically oriented tubular reactor system with a solar reflector that uses direct or reflected solar radiation to evaporate liquids, featuring a tension member for watertight seals and separate regions for feed and concentrate, allowing continuous operation and efficient vapor condensation without moving parts or membranes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If direct solar heating is used in traditional solar distillation systems, then the device can operate with simple structure and low cost, but the effectiveness is limited by the size of the device and energy efficiency is low
Solution Approach 1:
The patent transitions from horizontal/planar solar heating to vertical cylindrical geometry with solar concentrators positioned at the top, utilizing the vertical dimension to concentrate solar energy more effectively on a smaller footprint, thereby increasing productivity without sacrificing manufacturing simplicity
Solution Approach 2:
The invention changes the geometric parameters of the distillation system by using a vertical cylindrical configuration with concentrated solar heating at the top surface, rather than traditional horizontal pan designs, which increases the surface area-to-volume ratio and improves heating efficiency
2Quantity of substance
If inclined or horizontal tubes are used for evaporation, then the device can handle larger volumes, but the devices are susceptible to mineral (scale) buildup in the evaporation tubes
Solution Approach 1:
The patent uses a vertical cylindrical geometry instead of inclined or horizontal tubes, allowing gravity to naturally prevent mineral deposits from adhering to the evaporation surface, thereby maintaining reliability while handling larger water volumes
Solution Approach 2:
The invention changes the orientation parameter from horizontal/inclined to vertical, which fundamentally alters how minerals settle and deposit during evaporation, preventing scale buildup while maintaining large water handling capacity
3Productivity
If complex valves and mechanisms are used to maintain fluid levels and temperatures, then the device can operate continuously, but the device complexity increases
Solution Approach 1:
The patent employs passive operation where the vertical cylindrical design with top-mounted solar concentrators enables continuous evaporation and condensation cycles without complex valves or active control mechanisms, achieving continuous productivity through self-regulating thermal convection and phase change
Solution Approach 2:
The invention replaces mechanical valve systems with passive thermal convection and phase change mechanisms, where heat-driven fluid circulation and condensation occur naturally without mechanical intervention, reducing device complexity while maintaining continuous operation
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 achieves efficient and continuous water purification with reduced energy requirements and minimal maintenance, capable of operating at various scales with scalable design and reduced operational complexity.
Implementation Method 1
uses direct or reflected solar radiation to evaporate liquids
Implementation Method 2
A vertically oriented tubular reactor system with a solar reflector that uses direct or reflected solar radiation
Implementation Method 3
evaporate liquids, featuring a tension member for watertight seals and separate regions for feed and concentrate
Implementation Method 4
uses direct or reflected solar radiation to evaporate liquids
Implementation Method 5
The steam vapor generated rises above the water surface and condenses on the inside cover of the reactor
Data Source
AI summary
A solar distillation apparatus utilizing a substantially vertical reactor assembly is disclosed. The reactor includes a tubular outer shell, a base, a cap, and a central tension member. The annular space between the outer tube and the central tension member forms the reactor chamber. Seawater or other feed liquid enters the reactor chamber through the base plate. Reflected or direct solar energy heats the feed liquid, generating low pressure vapor. The vapor exits the reactor through the cap structure or the base. The concentrate left behind settles by gravity to the bottom region of the reactor's liquid column. Extension tubes on the feed openings allow feed liquid to enter the liquid column above the concentrate layer and avoid excessive mixing of the feed liquid and the concentrate. The concentrate exits the reactor through one or more openings in the base.