Mobile Device Self-Commissioning for HVAC Fresh Air Intake Control
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Solution Overview
Problem
Existing building management systems, specifically economizers, face challenges in providing significant cost savings due to difficulties in configuring them accurately during installation, requiring specialized components and services, and involving costly multiple iterations for fan speed commissioning.
Innovation Solution
A mobile device generates air flow tables based on fan speeds and damper positions, controlling actuators and receiving feedback signals from an air flow sensor, allowing for automated commissioning and reducing the need for specialized equipment and manual labor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If specialized components and services are used to improve economizer accuracy, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The system performs self-commissioning by automatically generating air flow tables through controlled actuator movement and sensor data collection. The economizer configures itself without requiring external specialized services or technicians, eliminating the need for complex commissioning procedures while maintaining accuracy.
Solution Approach 2:
The system creates digital copies of physical measurements by generating air flow tables that represent the relationship between damper positions and air flow rates. These digital models allow the system to simulate and predict performance without requiring physical testing under all conditions, reducing the need for specialized commissioning equipment.
2Manufacturing precision
If multiple iterations are performed for fan speed commissioning, then manufacturing precision is improved, but loss of time and productivity decrease
Solution Approach 1:
The system performs preliminary measurements and generates complete air flow tables for all fan speeds during initial commissioning. By pre-establishing the relationship between damper positions and air flow rates for multiple fan speeds, the system eliminates the need for repeated commissioning iterations when fan speeds are changed, saving significant time while maintaining accuracy.
3Ease of operation
If factory commissioning is performed, then ease of operation is improved, but measurement precision deteriorates due to lack of customization and testing
Solution Approach 1:
The system transitions from static factory configurations to dynamic on-site commissioning. The air flow tables are generated during actual installation with the specific HVAC system configuration, allowing the system to adapt to site-specific conditions while maintaining ease of operation through automated procedures. This dynamic approach ensures both convenience and precision.
Data Source
AI summary
There is described a mobile device and method for commissioning air intake control of an environmental control system. A communication component receives multiple air measurements from an air flow sensor, in which the air flow sensor is positioned in a duct compartment of the environmental control system. The processor generates multiple air flow tables based on the multiple air measurements, multiple fan speeds associated with the environmental control system, and multiple damper positions associated with the environmental control system. The communication component transmits the multiple air flow tables to an air intake controller of the environmental control system.