HVAC system, control method for HVAC system, and computer-readable storage medium
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Solution Overview
Problem
Conventional HVAC control methods fail to optimize electricity usage by stabilizing temperature setpoints, leading to inefficient energy consumption that does not align with the cleanliness of the energy source.
Innovation Solution
An HVAC system with a controller that adjusts temperature setpoints based on the predicted emission level of the energy source, reducing power input during high emission periods and increasing it during low emission periods, while considering thermal comfort constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the temperature setpoint is stabilized within a specific range during working hours, then thermal comfort is maintained, but electricity consumption is not optimized according to energy source cleanliness
Solution Approach 1:
The temperature setpoint is made dynamic by adjusting it according to the expected emission level of the energy source. During periods when clean energy is available, the setpoint allows for greater temperature variations, enabling the system to take advantage of clean energy for cooling or heating. This dynamic adjustment resolves the contradiction by making the temperature control adaptive rather than static, allowing thermal comfort to be maintained while optimizing electricity consumption efficiency based on energy source conditions.
Solution Approach 2:
The invention changes the temperature setpoint parameter based on the emission level of the energy source. When clean energy is available, the setpoint is adjusted to allow larger temperature deviations (e.g., higher temperatures in cooling mode), and when dirty energy is used, the setpoint returns to comfort-oriented values. This parameter change strategy enables the system to optimize energy consumption efficiency without permanently compromising thermal comfort, as comfort is restored when clean energy is unavailable.
2Loss of energy
If the HVAC system turns off during non-working hours to reduce electricity usage, then energy consumption is reduced, but the system cannot utilize clean energy opportunities when they occur
Solution Approach 1:
The system performs preliminary cooling or heating during periods when clean energy is available, even if the building is currently at comfortable temperature. By anticipating future energy needs and pre-conditioning the building during clean energy periods, the system reduces the need for energy-intensive operations during periods when dirty energy must be used. This preliminary action enables the system to both reduce overall energy consumption and maintain flexibility in utilizing clean energy opportunities.
3Use of energy by moving object
If the temperature setpoint is adjusted frequently to optimize energy consumption, then electricity usage efficiency improves, but thermal comfort stability deteriorates
Solution Approach 1:
The system incorporates feedback mechanisms that continuously monitor both the expected emission level of the energy source and the actual thermal comfort conditions in the building. The temperature setpoint adjustment is guided by this feedback, ensuring that changes are made only when clean energy opportunities arise and that comfort constraints are not violated. This feedback control resolves the contradiction by making the system responsive to both energy optimization opportunities and thermal comfort requirements, preventing excessive or inappropriate setpoint adjustments.
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 enhances the efficient use of electricity by aligning HVAC operations with cleaner energy sources, reducing overall emissions and maintaining thermal comfort.
Implementation Method 1
an air handling unit (10) provided with a heat exchanger (12), air is blown indoors after exchanging heat with the working fluid flowing through the heat exchanger (12)
Data Source
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AI summary
This application provides an HVAC system, a control method for an HVAC system, and a computer-readable storage medium. The HVAC system includes a chiller/heat pump unit, an air handling unit and a controller. The chiller/heat pump unit provides working fluid. The air handling unit is provided with a heat exchanger, air is blown indoors after exchanging heat with the working fluid flowing through the heat exchanger, and the air handling unit adjusts the supply air temperature based on a temperature setpoint. The controller is configured to acquire an expected emission level of an energy source powering the HVAC system and adjust the temperature setpoint based on the expected emission level.