Fresh air conditioning system
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Solution Overview
Problem
Existing air handling systems for fresh air conditioning lack the ability to efficiently control both temperature and humidity across different seasons without complicating the system configuration.
Innovation Solution
A fresh air conditioning system that integrates a thermoelectric cooling device with a dehumidifying rotary, utilizing a dual-zone dehumidifying rotary and a heat exchanger network to manage airflow temperature and humidity through seasonal switching of airflow paths and energy redirection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a bubble humidifier is incorporated to humidify the airflow, then the humidifying function is achieved, but the system configuration becomes complicated
Solution Approach 1:
The dehumidifying rotary is designed to perform multiple functions: during summer it dehumidifies fresh air in the processing zone, during winter it humidifies fresh air in the regenerating zone. This multi-functionality eliminates the need for a separate humidifier, achieving the humidifying function while simplifying the system configuration
Solution Approach 2:
The system dynamically switches the function of the dehumidifying rotary between processing zone and regenerating zone based on seasonal requirements. The airflow paths and thermal energy directions are dynamically adjusted to achieve either cooling-dehumidifying or heating-humidifying mode, enabling adaptability without additional fixed components
2Device complexity
If only cooling and dehumidifying functions are provided, then the system configuration remains simple, but the humidifying function is missing
Solution Approach 1:
The dehumidifying rotary dynamically switches roles between processing zone and regenerating zone based on seasonal needs. In winter, the regenerating zone becomes the processing zone where humidified air is generated, providing the humidifying function without adding permanent humidifying components to the system
3Productivity
If the dehumidifying rotary speed is increased to improve dehumidifying efficiency, then the dehumidifying rate increases, but the regenerating efficiency decreases
Solution Approach 1:
The dehumidifying rotary operates on a periodic cycle, rotating through different zones at optimized speeds. The system uses periodic switching between processing and regenerating modes, allowing the rotary to spend appropriate time in each zone to maintain both dehumidifying and regenerating efficiency
Solution Approach 2:
The rotary speed and zone configuration are dynamically adjusted based on operational requirements. The system optimizes the balance between dehumidifying and regenerating efficiency by controlling the rotary speed and airflow distribution in real-time
4Device complexity
If thermal energy from the thermoelectric cooling device is wasted, then the system operation simplifies, but energy consumption increases
Solution Approach 1:
The waste heat generated by the thermoelectric cooling device during summer cooling is converted into useful thermal energy for winter heating. The heat exchanger recovers and stores this thermal energy, which is then utilized during winter to reduce the heating energy requirement, transforming energy waste into energy benefit
Solution Approach 2:
The system recovers thermal energy that would otherwise be discarded by the thermoelectric cooling device. The heat exchanger captures and stores this thermal energy for later use during winter heating, preventing energy loss and improving overall system efficiency
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 cools and dehumidifies during summer and heats and humidifies during winter, utilizing energy from both ends of the thermoelectric cooling device to conserve energy without the need for additional humidifiers, thus simplifying the system configuration.
Implementation Method 1
The semiconductor used in this field is also called thermoelectric cooling device which utilizes the thermo-electric effect to get the cooling energy. A conductor is used to interconnect two different metals, and applied with DC power. As a result, temperature at one end decreases, and temperature at the other end increases.
Implementation Method 2
when the dehumidifying rotary rotates, a portion of the dehumidifying rotary rotated into a processing zone is used to absorb the moisture
Implementation Method 3
a first heat exchanger connected to the second section of the dehumidifying rotary and configured to conduct a heat exchange with a return airflow from a second space
Data Source
AI summary
A fresh air conditioning system includes a first cooling device having a first cooling end and a first heating end; a dehumidifying rotary defining a first section and a second section. An airflow switching device directs a fresh airflow toward the first cooling end or the first heating end, and then flows to the first section. A return airflow passes through a first heat exchanger, and conducts heat exchange with the other end of the first cooling device, and then flows to the second section. Or switching opposite ends of the first cooling device to selectively cool or heat, the fresh airflow conducts heat exchange with one end of the first cooling device, and then flows to the first section. The return airflow conducts heat exchange with the other end of the cooling device and then flows to the second section.