Method and device for controlling ice storage air-conditioning system, and electronic equipment
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Solution Overview
Problem
Ice storage air-conditioning systems face challenges in maintaining stable outlet water temperatures during mode switches, leading to significant fluctuations that can affect user experience, especially in environments with strict temperature and humidity requirements like factories and laboratories.
Innovation Solution
A method and device for controlling ice storage air-conditioning systems that adjust parameters based on the outlet temperature of a plate heat exchanger, including adjusting the number of operating water chilling units, chilled water pumps, and valve openings to maintain stable outlet temperatures and minimize energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If switch control logic is used to determine operation modes based on electricity price, then energy cost is reduced and peak load is shifted, but outlet water temperature fluctuation increases beyond acceptable range
Solution Approach 1:
The system performs preliminary actions by adjusting water chilling units and chilled water pumps before mode switching occurs. The controller predicts future outlet water temperature based on historical data and current parameters, then proactively adjusts equipment operation in advance to prevent temperature fluctuations when switching between ice storage and conventional cooling modes, thereby maintaining temperature stability while still achieving energy cost reduction through load shifting
Solution Approach 2:
The system implements feedback control by continuously monitoring outlet water temperature and using machine learning models to predict future temperature trends. The controller compares predicted temperatures with target ranges and automatically adjusts water chilling units and chilled water pumps to maintain temperature within ±0.5°C, ensuring that energy-saving mode switching does not compromise temperature stability
2Loss of energy
If mode switching between ice storage and conventional cooling is performed, then electricity bill is reduced, but temperature control stability deteriorates
Solution Approach 1:
The system applies dynamics by continuously adapting equipment operation parameters based on real-time conditions. The controller uses machine learning models to dynamically adjust water chilling units and chilled water pumps during mode transitions, ensuring smooth transitions between ice storage and conventional cooling modes without causing temperature instability, while still achieving electricity bill reduction through strategic load management
Solution Approach 2:
The system changes operational parameters dynamically during mode switching. The controller adjusts parameters such as pump frequency, valve openings, and equipment on/off states based on predicted temperature trends and current system state. These parameter changes enable the system to maintain temperature stability within ±0.5°C while transitioning between different cooling modes to optimize electricity consumption
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
Ensures stable outlet water temperatures with minimal energy consumption, improving user experience by maintaining temperature fluctuations within ±0.5°C during mode switches and optimizing energy usage.
Implementation Method 1
outlet temperature of a plate heat exchanger of the ice storage air-conditioning system
Data Source
AI summary
A method for controlling an ice storage air-conditioning system includes: adjusting parameters of the ice storage air-conditioning system in a current cooling mode or when switching a cooling mode based on an outlet temperature of a plate heat exchanger of the ice storage air-conditioning system; and controlling the ice storage air-conditioning system to perform a cooling operation based on the parameters of the ice storage air-conditioning system.