Heat Pump Staging Control for Reaching Water Supply Temperature
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Solution Overview
Problem
Existing heat pump systems face inefficiencies in reaching the total water supply temperature due to frequent shutdown of heat pumps when the water temperature approaches the target, leading to low water heating efficiency.
Innovation Solution
A control method for a heat pump system that involves obtaining a system requirement value and a historical level, performing level prediction to obtain a candidate level, comparing it with the historical level to determine a target level, and controlling heat pumps to be turned on or off based on the target level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If heat pumps are frequently turned off when water temperature approaches target, then energy consumption is reduced, but water heating efficiency deteriorates
Solution Approach 1:
The control device predicts future water supply temperature based on historical data and current status before the temperature actually reaches the target. This preliminary prediction allows the system to prepare for upcoming temperature changes, maintaining heat pump operation continuity and avoiding frequent shutdowns that would reduce heating efficiency while still managing energy consumption effectively.
2Device complexity
If heat pumps are turned off to control total output capacity, then system capacity is managed, but reliability of reaching target temperature deteriorates
Solution Approach 1:
The control device continuously monitors actual water supply temperature, compares it with predicted temperature, and uses this feedback to adjust heat pump operation. When the predicted temperature indicates approaching the target, the system proactively adjusts heat pump status to ensure the target is reached, rather than passively reacting after temperature changes occur.
3Ease of operation
If centralized control manages heat pump quantity, then system coordination is improved, but responsiveness to temperature changes deteriorates
Solution Approach 1:
By predicting future water supply temperature in advance, the control device can proactively adjust heat pump operation before temperature deviations occur. This preliminary action enables the system to maintain both good coordination through centralized control and fast response by anticipating temperature changes rather than reacting to them after they happen.
Data Source
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AI summary
The present application relates to the field of heat pump control technologies, and provides a control method, control apparatus and control device for a heat pump system and a storage medium, so as to improve the water heating efficiency of the heat pump system. The control method for the heat pump system includes: obtaining a system requirement value of a current period and a historical level of a previous period, and performing level prediction for the current period based on the system requirement value to obtain a candidate level; comparing the candidate level with the historical level to obtain a target level; and controlling one or more heat pumps in the heat pump system to be turned on or off based on the target level.