Wet evaporation-based cold concentration system
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Solution Overview
Problem
The open-type heat-source tower heat-pump air conditioner system faces issues with unstable anti-freezing solution concentration, leading to inefficiencies and environmental pollution, as existing methods require additional equipment, increased operational costs, and complex control systems.
Innovation Solution
A wet evaporation-based cold concentration system that uses a wet evaporator, concentration pool, and circulating pumps to increase anti-freezing solution concentration through low-temperature air exchange, eliminating the need for additional heating or dehumidification devices and reducing agent usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reverse osmosis and negative-pressure evaporation concentration methods are used, then anti-freezing solution concentration can be maintained, but device complexity and operational costs increase
Solution Approach 1:
The system uses the heat pump's own waste heat from refrigerant condensation to evaporate water from the anti-freezing solution, concentrating it without external energy input. The refrigerant's condensation heat automatically serves the concentration function, making the system self-sufficient and eliminating complex external heating equipment.
Solution Approach 2:
The heat pump system simultaneously performs refrigeration/heating functions and anti-freezing solution concentration. The same refrigerant cycle provides both the cooling effect for air conditioning and the thermal energy for water evaporation from the anti-freezing solution, achieving multiple functions with a single system.
2Productivity
If distillation kettle and preheater are added to concentrate anti-freezing solution, then concentration efficiency improves, but initial investment and operation cost increase
Solution Approach 1:
The system utilizes the refrigerant's condensation heat that would otherwise be wasted to provide the evaporation energy needed for concentration. This self-service approach eliminates the need for separate preheaters and external energy sources, reducing both initial investment and ongoing operational costs while maintaining concentration efficiency.
Solution Approach 2:
The system recovers the waste heat from refrigerant condensation that would normally be discarded to the environment. This recovered thermal energy is then used to evaporate water from the anti-freezing solution, converting a waste resource into a useful function and eliminating the need for additional heating equipment.
3Loss of energy
If vacuum boiling is used for solution concentration, then heat reutilization is achieved, but system complexity and building space requirements increase
Solution Approach 1:
The system achieves heat reutilization by having the refrigerant's condensation heat directly evaporate water from the anti-freezing solution in an open evaporation chamber. This self-service heat transfer eliminates the need for vacuum pumps, pressure vessels, and complex control systems required in traditional vacuum boiling methods.
Solution Approach 2:
The invention extracts and utilizes the waste heat from the refrigerant condensation process, separating this thermal energy recovery function from complex vacuum systems. By taking out only the essential heat transfer function and implementing it through simple evaporation, the system achieves energy reutilization without vacuum equipment complexity.
4Reliability
If throttling flash evaporation is used with multiple power apparatuses, then solution regeneration is achieved, but system complexity and control difficulty increase
Solution Approach 1:
The system achieves solution regeneration through the natural evaporation process driven by refrigerant condensation heat. The refrigerant cycle automatically provides the thermal energy needed for water evaporation from the anti-freezing solution, eliminating the need for solution pumps, throttling devices, and complex multi-apparatus control systems.
Solution Approach 2:
The invention replaces complex mechanical systems (pumps, throttling valves, flash chambers) with a passive thermal process. The refrigerant's condensation heat naturally drives water evaporation from the anti-freezing solution through simple heat transfer, substituting mechanical regeneration equipment with a thermally-driven natural evaporation process.
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 simplifies the concentration process, reduces operational expenses, minimizes environmental impact, and ensures stable system performance with flexible operation, independent of weather conditions.
Implementation Method 1
wet evaporation-based cold concentration system includes a wet evaporator... to increase anti-freezing solution concentration through low-temperature air exchange
Data Source
AI summary
The present invention relates to a wet evaporation-based cold concentration system, which is mainly applied to the technical field of air conditioners, and particularly applied to the technical field of heat-source tower heat-pump air conditioners. By utilizing a wet evaporation theory, a low-temperature low-concentration anti-freezing solution is enabled to contact low-temperature air in a wet evaporator to perform the heat and mass transfer, and water in the anti-freezing solution is vaporized at a low temperature into the air, thereby obtaining the high-concentration anti-freezing solution. By reasonably utilizing the concentration pool and the storage pool, the low-concentration anti-freezing solution is separated from the high-concentration anti-freezing solution, thereby achieving a purpose of simultaneously concentrating and storing the anti-freezing solution