Wireless Sensor Network for Occupancy-Based HVAC Microclimate Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional HVAC systems rely on single temperature readings, leading to hot and cool spots in enclosed spaces due to inadequate temperature mapping, and require manual adjustments of dampers, which are inefficient and energy wasteful.
Innovation Solution
A network of wireless remote climate sensors that collect temperature and humidity data across an enclosed space, creating a heat map to direct airflow and adjust damper settings dynamically, while also detecting occupancy to personalize microclimates and optimize resource use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a single temperature sensor at the thermostat is used to control airflow, then the system is simple to operate, but temperature imbalances and hot/cool spots develop in other areas of the enclosed space
Solution Approach 1:
The enclosed space is divided into multiple zones, each equipped with its own temperature sensor. This segmentation allows independent temperature monitoring and control in each zone, eliminating the single-point measurement limitation and resolving temperature imbalances across different areas.
Solution Approach 2:
The system transitions from single-point temperature measurement at the thermostat to multi-dimensional spatial temperature mapping through distributed sensors throughout the enclosed space. This dimensional expansion enables comprehensive temperature distribution awareness and targeted airflow control to specific zones.
2Temperature
If manual damper adjustments are implemented to remedy temperature imbalances, then localized temperature control is improved, but user convenience deteriorates due to manual intervention requirements
Solution Approach 1:
The system implements automated damper control where dampers self-adjust based on real-time temperature sensor data from each zone. The control system automatically opens or closes dampers to maintain desired temperature setpoints without requiring manual user intervention, while still achieving localized temperature control.
Solution Approach 2:
Temperature sensors in each zone provide continuous feedback to the control system, which automatically adjusts damper positions to maintain optimal temperature. This closed-loop feedback mechanism eliminates manual adjustments while preserving local temperature control capability.
3Measurement precision
If automated dampers with temperature sensors are used, then temperature monitoring is improved, but the temperature map accuracy deteriorates because sensors measure air exiting dampers rather than ambient temperature
Solution Approach 1:
Temperature sensors are strategically positioned to measure ambient temperature in each specific zone rather than measuring air near dampers. Each sensor is located to capture the true environmental temperature conditions experienced by occupants, providing accurate local temperature data for control decisions.
4Temperature
If airflow is increased throughout the system to compensate for temperature imbalances, then temperature uniformity is improved, but energy consumption increases
Solution Approach 1:
The system provides differentiated airflow control to different zones based on their specific temperature needs. Dampers are opened or closed to deliver airflow only to zones requiring temperature correction, rather than increasing airflow throughout the entire system. This localized approach achieves temperature uniformity while minimizing energy consumption.
Data Source
AI summary
A network of wireless remote climate sensors in a heating, ventilation, and air conditioning (HVAC) system permits the creation of personalized microclimates within an enclosed space. In addition to collecting temperature and humidity data, the wireless remote climate sensors can detect whether the enclosed space is occupied by a human. Human detection is made possible by optional cameras, microphones, and gas sensors on the wireless remote climate sensors. As the human moves throughout the enclosed space, the HVAC system is able to track the human's movement using the wireless remote climate sensors. The HVAC system may adjust airflow to different portions of the enclosed space based on the human's location. The result is an efficient use of system resources to keep users at their ideal temperature.