Cooling Control Using Delayed Temperature Peak Estimation
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Solution Overview
Problem
In cooling systems where a heat medium flows from a first unit to a second unit, there is a delay period between the outflow from the first unit and the inflow to the second unit, making it inaccurate to directly monitor the temperature of the heat medium flowing into the second unit based on the temperature detected or estimated at the first unit.
Innovation Solution
A control device that repeatedly detects or estimates the temperature of the heat medium flowing out of the first unit at predetermined intervals, stores temperature data as a data group, and estimates the temperature of the heat medium flowing into the second unit by finding the maximum value from this data group, considering the delay period between the units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the temperature of the heat medium flowing out of the first unit is directly used as the temperature of the heat medium flowing into the second unit, then the monitoring process is simplified, but the temperature estimation accuracy deteriorates due to the delay period
Solution Approach 1:
The control device stores multiple pieces of temperature data detected at predetermined time intervals before using them for estimation. This preliminary storage of historical data allows the system to account for the delay period between the first unit and second unit, selecting the most appropriate temperature value from the stored data group rather than directly using the latest detected temperature.
2Measurement precision
If multiple pieces of temperature data are stored to account for the delay period, then the temperature estimation accuracy improves, but the memory capacity requirements increase
Solution Approach 1:
The control device extracts and stores only the necessary number of temperature data points required to cover the delay period. Rather than storing all historical temperature data indefinitely, the system determines the appropriate number of data points based on the delay characteristics and stores only that specific quantity, thereby reducing unnecessary memory usage while maintaining estimation accuracy.
Data Source
AI summary
A control device for a cooling system is provided. The cooling system includes a cooling path through which a heat medium flows in an order of a first unit and a second unit. The cooling system is configured to cool the first unit and the second unit. The control device includes a processor being configured to execute: a process of repeatedly detecting or estimating a temperature of the heat medium flowing out of the first unit at predetermined time intervals, a process of storing a plurality of pieces of temperature data of the temperature detected or estimated during an immediately preceding predetermined period as a data group including a predetermined number of pieces of data, and a process of estimating a temperature of the heat medium flowing into the second unit by finding a maximum value from the data group.