Train Ventilation Control Using Air Quality Feedback Switching
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Solution Overview
Problem
High-speed trains face challenges in maintaining comfortable and healthy interior air quality due to varying external air pollution levels, which affects passenger comfort and energy efficiency.
Innovation Solution
An interior air quality monitoring and ventilation control system that uses neural networks to analyze air quality data from multiple sensors, adjusting ventilation strategies to ensure healthy air quality while conserving energy and protecting the environment by selecting between exterior fresh air volume control and interior air purification based on comprehensive evaluation indices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the ventilation volume is increased to improve interior air quality, then air quality improves, but energy consumption increases
Solution Approach 1:
The system dynamically adjusts the ventilation volume parameter based on real-time air quality monitoring data. When interior air quality deteriorates (e.g., CO2 concentration increases), the ventilation volume is increased; when air quality is good, the ventilation volume is reduced. This dynamic parameter adjustment resolves the contradiction by optimizing energy consumption while maintaining acceptable air quality levels.
Solution Approach 2:
The system implements a closed-loop feedback mechanism where air quality sensors continuously monitor interior conditions, and the ventilation system adjusts its operation based on this feedback. The comparison between interior and exterior air quality indices triggers appropriate ventilation or purification modes, ensuring energy-efficient operation while maintaining air quality standards.
2Ease of operation
If exterior air is used for ventilation when exterior air quality is poor, then ventilation function is maintained, but interior air quality deteriorates due to secondary pollution
Solution Approach 1:
The system introduces an intermediary decision-making mechanism that compares interior and exterior air quality indices before selecting the ventilation strategy. When exterior air quality is poor (Q1 < Q0), the system switches from exterior fresh air ventilation to alternative strategies such as interior air purification or recirculation, preventing secondary pollution while maintaining ventilation function.
Solution Approach 2:
The system dynamically switches between different ventilation modes (exterior fresh air, interior purification, recirculation) based on real-time air quality conditions. This dynamic adaptation allows the system to maintain ventilation functionality while avoiding the introduction of polluted exterior air into the interior space.
3Object-affected harmful factors
If air purification devices are activated to improve interior air quality, then air quality improves, but device complexity and energy consumption increase
Solution Approach 1:
The system activates air purification devices selectively and partially based on air quality conditions, rather than operating continuously at full capacity. Purification is applied only when interior air quality deteriorates beyond acceptable thresholds, reducing overall energy consumption and device complexity while maintaining air quality standards during normal conditions.
Data Source
AI summary
The present invention discloses an interior air quality monitoring and ventilation control method and system for a train. The interior air quality monitoring and ventilation control method for the train comprises: acquiring multiple groups of interior and exterior air quality detection data; acquiring interior and exterior air comprehensive evaluation index Q0 and Q1 by using the experimental data; training an exterior fresh air volume control model if Q0≥Q1, or else training an interior air purification control model; detecting the interior and exterior air quality detection data; acquiring the interior and exterior air comprehensive evaluation index Q0 and Q1 by using the detection data; if Q0≥Q1, calling the exterior fresh air volume control model to obtain the required ventilation volume level and controlling a ventilation system with the output result; otherwise, calling the interior air purification control model to obtain the required ventilation volume level and air purification device power level, controlling the ventilation system and the air purification device with the output results. The present invention can apply suitable ventilation control strategies according to different degrees of air quality, to achieve a health guarantee for the interior air quality of the high-speed train under the conditions of energy conservation and environmental protection.