Heating, ventilation, and air conditioning management system and method
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Solution Overview
Problem
Modern HVAC systems in commercial spaces, such as data centers, operate inefficiently due to independent unit control, leading to 'load hopping' and high energy consumption, resulting in uneven temperature distribution and increased greenhouse gas emissions.
Innovation Solution
The system controls HVAC units using both return air and supply air temperature sensors to prioritize cooling valve operation over fan speed, ensuring efficient temperature maintenance and reducing power consumption by minimizing fan usage and avoiding load hopping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If each HVAC unit operates independently to maintain its individual space temperature, then each unit can respond quickly to local temperature changes, but the system experiences load hopping and uneven operations between units leading to high energy consumption
Solution Approach 1:
The patent merges the control functions of multiple independent HVAC units into a coordinated system where units communicate with each other and a central controller. This allows the system to maintain local responsiveness while avoiding load hopping by distributing loads evenly across units based on real-time conditions, thereby reducing overall energy consumption.
Solution Approach 2:
The system implements feedback mechanisms where temperature sensors continuously monitor conditions and communicate this information to the control system. The control system uses this feedback to dynamically adjust each unit's operation, preventing unnecessary full-capacity cycling and optimizing energy usage while maintaining local temperature control.
2Device complexity
If HVAC units use limited sensors and lack direct communication with other units, then the system structure remains simple, but load hopping occurs and units constantly activate and deactivate leading to inefficient power consumption
Solution Approach 1:
The control system is designed to perform multiple functions: it monitors temperature, coordinates unit operations, prevents load hopping, and optimizes energy consumption. This multi-functional approach allows the system to maintain relative structural simplicity while achieving sophisticated energy management through intelligent control algorithms.
Solution Approach 2:
The system dynamically adjusts the operational state of each HVAC unit based on real-time conditions rather than operating in fixed states. This dynamic coordination allows units to smoothly transition between active and standby modes, preventing the constant activation and deactivation that causes energy waste, while maintaining a relatively simple physical structure.
3Ease of operation
If HVAC units operate at full capacity or idle without coordination, then each unit can maintain its individual control simplicity, but uneven floor temperature distribution and localized supply air heating occur
Solution Approach 1:
The system maintains individual unit control simplicity by allowing each unit to independently monitor and control its local environment. However, it enhances temperature distribution uniformity by having units coordinate their operations based on local sensor data, adjusting their output to compensate for spatial variations and prevent localized overheating or uneven floor temperatures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces energy consumption by up to 25% and decreases greenhouse gas emissions, saving corporations millions of dollars annually while maintaining consistent temperature and air quality across large environments.
Implementation Method 1
a cooling valve, and a processor that is coupled to least one fan and at least one cooling valve
Implementation Method 2
controlling a fan and a cooling value of the at least one HVAC unit based on the received return air temperature signal and the received supply air temperature signal
Implementation Method 3
controlling a fan and a cooling value of the at least one HVAC unit
Data Source
AI summary
Systems and methods of controlling a heating, ventilating, and air conditioning system are provided that operate according to signals returned from return air temperature sensors as well as the supply air temperature sensors. Using predetermined temperature setpoints, return temperature information, and supply temperature information, the HVAC system is configured to maintain the temperature of a room first, by the use of its cooling valve, and second and only when the capacity of the cooling valve has peaked, by use of the fan. The presently disclosed improved HVAC system operates more efficiently by avoiding unit loading hopping and minimizing power consumption.