Air Conditioning Assembly with Bypass Cooling Modes
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Solution Overview
Problem
Existing air conditioning methods for rooms with heat-generating devices face challenges in achieving energy-optimized cooling with minimal structural effort, especially when the heat exchanger is not designed to handle high heat loads, and require flexible operation modes to adapt to varying outside air temperatures.
Innovation Solution
The method allows for air conditioning in recirculation, pure outside air, or mixed modes, where outside air can be supplied to the room bypassing the heat exchanger, and closure devices control airflow to optimize energy efficiency, enabling 100% free cooling when possible and mixing exhaust air with outside air for additional cooling when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the heat exchanger is not designed for high heat loads in terms of surface area, then the structural effort and cost are reduced, but the cooling capacity is insufficient to handle high heat loads
Solution Approach 1:
The system dynamically switches between different cooling modes (recirculation mode using the heat exchanger, pure outside air mode bypassing the heat exchanger, and mixed mode combining both) based on the heat load conditions. This allows a smaller heat exchanger to handle variable heat loads effectively by supplementing with outside air when needed.
Solution Approach 2:
The air conditioning system performs multiple functions: it can cool via the heat exchanger in recirculation mode, bypass the heat exchanger using outside air in pure outside air mode, or combine both methods in mixed mode. This multi-functionality allows the system to adapt to different heat load conditions with a smaller heat exchanger.
2Use of energy by moving object
If outside air is supplied to bypass the heat exchanger, then energy efficiency is improved through free cooling, but the heat exchanger efficiency and heat dissipation capability are reduced
Solution Approach 1:
The system dynamically adjusts the mixing ratio between outside air and recirculated air based on outside air temperature and heat load conditions. When outside air is cool, it provides free cooling; when outside air is warm, the system relies more on the heat exchanger. This dynamic adjustment optimizes energy efficiency while maintaining heat exchanger effectiveness.
Solution Approach 2:
The system changes the parameter of air composition (ratio of outside air to recirculated air) based on operating conditions. By varying this parameter, the system achieves energy efficiency when outside air is favorable while preserving heat exchanger efficiency when needed.
3Temperature
If the first room is divided into cold and warm room areas by heat-generating devices, then the cooling demand is concentrated in specific areas, but the air circulation complexity increases
Solution Approach 1:
The system provides localized cooling to warm room areas by extracting hot air from these specific locations and directing it through the heat exchanger. The fan device and air circulation system are configured to target specific warm zones created by heat-generating devices, providing localized temperature control without complex multi-zone infrastructure.
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 approach enables energy-efficient cooling with reduced structural requirements, allowing for flexible operation based on temperature settings and outside air conditions, ensuring effective heat dissipation from heat-generating devices while maintaining the heat exchanger's efficiency and ease of maintenance.
Implementation Method 1
a heat exchanger through which fluid flows, in particular through which cold water flows
Implementation Method 2
air being able to be sucked in from the warm area via the suction side of the fan device and via the Pressure side air can be supplied to the cold room area
Data Source
Figure 1
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AI summary
The climate control assembly has side walls (20,22) for limiting a space (10) to be conditioned, where openings are formed on the side walls. The side wall and a bottom wall (26) define a cavity (28). The cavity is connected with a closure medium (56) for exhaust air. A cold space area (31) is directly or indirectly connected with another closure medium (48) for outside air. The space is air-conditioned in recirculation mode or pure fresh air mode according to a temperature adjusted in the space.