VAV self commissioning in a building automation system
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Solution Overview
Problem
Current HVAC systems require on-site commissioning by technicians, which is time-consuming and increases the risk of disease transmission, particularly during outbreaks like COVID-19, as it necessitates multiple workers being present at installation locations.
Innovation Solution
A method and system for self-commissioning variable air volume (VAV) systems over a wireless network, allowing HVAC technicians to remotely instruct VAV controllers to perform commissioning tests, including cold and hot commissioning sequences, using a user interface, and automatically adjust or notify users of system operability, reducing the need for on-site presence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If on-site commissioning is performed by technicians, then system verification and adjustment can be conducted, but commissioning time increases and disease transmission risk increases
Solution Approach 1:
The VAV system performs self-commissioning by automatically executing commissioning sequences, conducting tests, and generating reports without requiring on-site technician presence. The system uses its own controllers and sensors to verify operation and adjust parameters remotely.
Solution Approach 2:
A wireless communication network acts as an intermediary between remote technicians and the VAV system, enabling remote instruction delivery and data retrieval. This mediator allows commissioning activities to occur without physical presence while maintaining system verification capability.
2Reliability
If on-site commissioning is performed by technicians, then system verification and adjustment can be conducted, but disease transmission risk increases
Solution Approach 1:
The VAV system performs self-commissioning by automatically executing commissioning sequences, conducting tests, and generating reports without requiring on-site technician presence. The system uses its own controllers and sensors to verify operation and adjust parameters remotely.
Solution Approach 2:
A wireless communication network acts as an intermediary between remote technicians and the VAV system, enabling remote instruction delivery and data retrieval. This mediator allows commissioning activities to occur without physical presence while maintaining system verification capability.
3Productivity
If remote self-commissioning is performed over wireless network, then commissioning time is reduced and disease transmission risk is minimized, but system complexity increases
Solution Approach 1:
The VAV controller is designed to perform multiple functions: it acts as both the system controller for HVAC operations and the commissioning execution unit. This multi-functionality reduces the need for separate commissioning equipment while enabling remote self-commissioning capabilities.
Solution Approach 2:
The system implements feedback mechanisms where the VAV controller receives remote instructions, executes commissioning sequences, monitors system responses through sensors, and reports results back to the wireless network. This feedback loop enables automated verification without on-site technicians.
Data Source
AI summary
A method for commissioning a variable air volume (VAV) system is shown. The method includes receiving instructions via an application on a user interface, the instructions provided over a wireless communications network. The method further includes determining that a cold commissioning testing sequence has been completed for the VAV system. The method further includes, in response to determining that the cold commissioning testing sequence has been completed, initiating a hot commissioning testing sequence. The method further includes performing the hot commissioning testing sequence. The method further includes providing a report of the hot commissioning testing sequence to the user interface.