Efficient air processing system with heat pipe
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Solution Overview
Problem
Air processing systems in natatoriums face high energy consumption due to dehumidification needs, especially in warmer climates where incoming air is already at a high temperature and humidity level, limiting the effectiveness of heat pipe systems.
Innovation Solution
Incorporating a 'wrap-around' air path that diverts cooled exhaust air into the intake air path to mix with incoming fresh air, reducing the temperature of the fresh air before it reaches the cooling element, and using a vertical heat pipe with an evaporator section in the exhaust air path and a condenser section in the intake air path to pre-heat incoming air, while also providing a dehumidification air path that directs fresh air through the evaporator section to pre-cool it before mixing with recirculated air.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a heat pipe system is used to dehumidify recirculated air, then energy consumption for dehumidification is reduced, but the system effectiveness is limited in warmer climates where incoming air is already at high temperature and humidity
Solution Approach 1:
The air processing system is divided into separate functional paths: a first air path for cooling and dehumidifying incoming fresh air, and a second air path for heating recirculated air using the heat pipe. This segmentation allows each path to be optimized for its specific function, enabling the system to effectively handle high temperature and humidity conditions in warmer climates by dedicating the first path to cooling before dehumidification.
Solution Approach 2:
The system performs preliminary cooling of the incoming fresh air in the first air path before it enters the heat pipe for dehumidification. By pre-cooling the air to a lower temperature, the heat pipe operates more efficiently in removing moisture, as the temperature difference between the air and the heat pipe evaporator is greater, enhancing the dehumidification effectiveness in warmer climates.
2Productivity
If incoming fresh air is cooled to reduce humidity, then dehumidification efficiency is improved, but additional cooling capacity is required
Solution Approach 1:
The system uses the cold coil from the first air path to cool incoming fresh air in the second air path, and uses the heat pipe to transfer heat from the recirculated air to pre-cool the incoming air. This self-service approach allows the system to utilize its own components for pre-cooling, reducing the demand on external cooling capacity while maintaining high dehumidification 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
This configuration reduces energy consumption by allowing the cooling element to focus more capacity on dehumidification, as the incoming air is already cooled to a temperature close to its dewpoint, resulting in significant energy savings and improved efficiency even in warmer climates.
Implementation Method 1
heat is extracted by the evaporator section 112 from the exhaust air flow, indicated by arrow 116, cooling it
Implementation Method 2
heat from the air is extracted to vaporize a liquid in the heat pipe
Implementation Method 3
heat transferred from condenser section 114 before being introduced into the natatorium
Implementation Method 4
heat from the vapor inside the heat pipe is given off as the vapor condenses back into a liquid
Implementation Method 5
the cooling element 320, and the cooled air can then be reheated
Implementation Method 6
to remove moisture, making subsequent heating more efficient
Data Source
AI summary
Dehumidification efficiency in an air processing system can be increased by mixing cooled exhaust air with incoming fresh air prior to cooling the incoming air to reduce its moisture content. Cooling the incoming air brings it closer to its dewpoint, allowing a cooling element to use more of its capacity for reducing latent heat than sensible heat.