Occupancy-Aware HVAC Control Using Location Signals
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Solution Overview
Problem
Traditional HVAC systems lack the ability to dynamically adjust temperature settings based on the location and occupancy status of individuals within a conditioned space, leading to inefficiencies and discomfort.
Innovation Solution
A system controller that utilizes a location-reporting device to adjust HVAC settings in response to the movement and proximity of occupants, allowing for personalized comfort control and improved efficiency by changing operational modes based on occupancy status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional HVAC systems maintain fixed temperature settings, then system simplicity is preserved, but energy efficiency deteriorates due to inability to adapt to occupancy changes
Solution Approach 1:
The HVAC system automatically detects occupancy through location-reporting devices and adjusts temperature settings without manual intervention. The system serves itself by monitoring device locations and autonomously modifying operational parameters to maintain comfort while reducing energy consumption during unoccupied periods.
Solution Approach 2:
The system continuously receives location signals from portable devices and uses this feedback to dynamically adjust HVAC operations. The controller monitors real-time occupancy status and modifies temperature setpoints accordingly, creating a closed-loop control system that responds to changing conditions.
2Ease of operation
If HVAC systems continuously adjust temperature based on occupancy, then comfort is improved, but energy consumption increases due to frequent system adjustments
Solution Approach 1:
The system anticipates occupancy changes by detecting when portable devices approach or leave the premises before actual occupancy changes occur. By pre-adjusting temperature settings in response to predicted occupancy status, the system maintains comfort while avoiding unnecessary energy consumption from reactive adjustments.
3Adaptability or versatility
If location-reporting devices are used to detect occupancy, then personalized comfort control is achieved, but system complexity increases due to additional sensors and communication requirements
Solution Approach 1:
The system uses universal location-reporting devices that serve multiple functions: occupancy detection, identification, and tracking. These portable devices, which users already carry for other purposes, enable the HVAC system to recognize individual users and apply their preferred temperature settings, providing personalized control without requiring dedicated sensors.
Data Source
AI summary
A heating, ventilation and air-conditioning system includes a system controller configured to control the operation of a demand unit to maintain an environmental set point of a control zone. The system controller is further configured to control the demand unit in response to a location signal received from a location-reporting device.