Vapor Compression Distillation with Heat Recovery for Water Purification
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Solution Overview
Problem
There is a need for a reliable and efficient method to purify water on a decentralized scale without the need for consumables, constant maintenance, and adequate power supply, particularly in developing regions with limited resources and infrastructure.
Innovation Solution
A fluid vapor compression distillation system with a regenerative blower, evaporator condenser, and control system that includes a blow down controller and source flow controller, utilizing a Stirling engine for power, to efficiently purify water by transforming source fluid into steam and product fluid while maintaining optimal operational states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vapor compression distillation is used to purify water, then water purification capability is improved, but power consumption increases and reliability decreases in resource-limited settings
Solution Approach 1:
The patent combines the evaporator and condenser into a single integrated unit where the condenser serves dual purposes: condensing vapor to produce purified water and providing thermal feedback to preheat the incoming source water. This merging eliminates the need for separate heating systems and reduces overall power consumption while maintaining purification capability.
Solution Approach 2:
The system uses the thermal energy from the condensing vapor to preheat the incoming source water automatically, creating a self-sustaining thermal cycle. The condensed water itself serves as the cooling medium, and the heat released during condensation is directly utilized to reduce the energy input required for evaporation, making the system self-regulating and reducing external power needs.
2Reliability
If centralized large-scale water systems are implemented, then water purification effectiveness is improved, but infrastructure requirements and operational complexity increase
Solution Approach 1:
The patent designs a decentralized, modular distillation unit that can be deployed independently without requiring centralized infrastructure. The system segments the water purification function into self-contained modules that include integrated heat exchangers, vapor compression components, and control systems, allowing deployment in remote or resource-limited areas without centralized water systems.
Solution Approach 2:
The distillation unit is designed to handle various water quality conditions and contaminant types through its vapor compression and condensation process, making it universally applicable to different source water conditions. The system performs multiple functions including heating, evaporation, condensation, and water storage within a single integrated unit, eliminating the need for separate infrastructure components.
3Reliability
If conventional distillation systems are used, then water purification is achieved, but maintenance requirements and operational costs increase
Solution Approach 1:
The system incorporates automatic control mechanisms that monitor and adjust operating parameters to optimize performance and prevent malfunction. The condensed water automatically serves as the cooling medium, and the system self-regulates the thermal cycle, reducing the need for manual intervention and maintenance. The integrated design minimizes the number of separate components that could fail or require maintenance.
Solution Approach 2:
The system uses feedback control where the condenser temperature and pressure conditions are monitored to automatically adjust the evaporation rate and heating input. This closed-loop control prevents operational deviations that could lead to maintenance issues, and the system automatically adapts to changing conditions to maintain optimal performance without manual intervention.
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 purifies water by reducing power requirements and maintenance needs, enhancing efficiency and production capability, making it suitable for decentralized water purification in resource-limited areas.
Implementation Method 1
the evaporator condenser transforms source fluid into steam
Implementation Method 2
the evaporator condenser transforms compressed steam into product fluid
Implementation Method 3
the regenerative blower compresses steam
Implementation Method 4
a heat exchanger fluidly connected to the source fluid input and a product fluid output
Data Source
Figure 1
Figure 1A
Figure 1B
AI summary
A fluid vapor distillation system. The system includes a control system for controlling a fluid vapor distillation apparatus including a blow down controller for controlling a blow down valve, a source flow controller for controlling a source flow valve, and a blow down level sensor in communication with a blow down controller and a source flow controller, the blow down level sensor sends signals related to the blow down level to the blow down controller and the source flow controller indicative of the blow down level, wherein the source flow controller actuates the source flow valve based at least on the blow down level sensor signals, and wherein the blow down controller actuates the blow down valve based at least on the blow down level sensor signals, whereby the blow down level and the source flow level are maintained using the blow down level sensor signals as input.