Vapor Compression Distillation with Hexagonal Tubes
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Solution Overview
Problem
Current water purification methods, such as reverse osmosis and distillation, face challenges due to high energy requirements, expensive equipment, and limited scalability, which restricts their ability to meet the demand for adequate quality water.
Innovation Solution
A compact vapor compression distillation device that reduces energy requirements by using a heat pump vapor compression cycle with a fluid vapor pump, eliminating one heat exchanger and minimizing temperature differences, and employs Polypropylene as a cost-effective and durable material for containment and heat transfer, optimizing heat transfer through hexagonal tubes with enhanced surface areas and surface roughening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional distillation or reverse osmosis is used for water purification, then adequate quality water is produced, but energy requirements are high and equipment costs are expensive
Solution Approach 1:
The invention utilizes phase transitions of water (liquid to vapor to liquid) in a distillation process. Water is evaporated and then condensed to produce purified distillate, leveraging the phase change properties to achieve purification while managing energy requirements through heat pump integration
Solution Approach 2:
A heat pump acts as an intermediary device to transfer thermal energy from the condensing distillate back to the feed water. This intermediary heat transfer mechanism enables energy recovery and reduces the overall energy input required for the distillation process
2Reliability
If conventional distillation is used for water purification, then adequate quality water is produced, but equipment cost is expensive
Solution Approach 1:
The invention employs polypropylene, a cost-effective and durable material, for constructing the distillation chamber, heat exchangers, and other system components. This material choice significantly reduces equipment manufacturing costs while maintaining functional reliability for water purification
Solution Approach 2:
The system operates at atmospheric pressure rather than requiring high-pressure equipment, and uses moderate temperatures enabled by the heat pump. These parameter changes allow for simpler, less expensive equipment construction compared to high-pressure or high-temperature systems
3Reliability
If conventional distillation is used for water purification, then adequate quality water is produced, but the system is not scalable to meet large demand
Solution Approach 1:
The distillation system is designed as a modular unit with distinct functional chambers (feed water chamber, distillation chamber, condensation chamber) that can be replicated and connected in series or parallel. This segmentation enables scalable deployment to meet larger water purification demands by simply adding more modular units
Solution Approach 2:
The heat pump serves multiple functions: it condenses vapor in the distillate chamber, transfers heat to the feed water chamber, and can be integrated with renewable energy sources. This multi-functionality increases system efficiency and makes the technology adaptable to various deployment scenarios for scaled implementation
4Use of energy by stationary object
If heat exchangers are used in vapor compression cycle, then heat transfer is achieved, but temperature differences are large and energy efficiency is reduced
Solution Approach 1:
The invention merges the condensation chamber and heat exchanger into a single integrated unit. The distillate condenses directly on the heat exchanger surfaces within the same chamber, eliminating the need for separate heat exchanger components and reducing thermal losses associated with intermediate heat transfer steps
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 a significant reduction in energy input, with a gain factor of 372 compared to conventional boiling and 124 compared to conventional heat pump systems, resulting in a low-cost, efficient, and low-maintenance water purification process with minimal waste stream.
Implementation Method 1
a heat pump vapor compression cycle with a fluid vapor pump
Implementation Method 2
Heat exchanger HE2 is provided as a heat source for a compressor P which pumps a heat exchange fluid around a loop and discharges heat back into the fluid to be heated via Heat Exchanger HE1
Implementation Method 3
employs Polypropylene as a cost-effective and durable material for containment and heat transfer, optimizing heat transfer through hexagonal tubes with enhanced surface areas and surface roughening
Implementation Method 4
The fluid must be heated from its intake temperature and boiled or evaporated
Implementation Method 5
the energy of evaporation cannot be reclaimed by straightforward heat exchange
Data Source
AI summary
In an improved method of distilling fluids, some or all of the fluid is recovered as distillate and the fluid is situated in the shell side of a first shell and tube heat exchanger. The fluid to be recovered as distillate is successively boiled, demisted, compressed and then introduced into upper ends of the tubes. A second shell and tube heat exchanger is located below the first heat exchanger, and distillate from upper ends of the tubes in the second heat exchanger are arranged to receive distillate liquid and/or vapor from the lower ends of tubes of the first heat exchanger. The fluid is located in the shell of the second heat exchanger and that fluid is heated but is not boiled. A mechanism is provided to supply at least some of the heated fluid to the shell of the first heat exchanger.