Heating Circulation Pump Control for Under- and Oversupply Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional heating systems with variable-speed circulating pumps often experience temporary undersupply or oversupply issues, leading to inefficiencies such as noise, energy waste, or inadequate heat distribution, which existing control methods fail to reliably address.
Innovation Solution
A method for controlling the variable-speed heating circulating pump by recording the time profile of the delivery rate or flow rate and comparing it to a predetermined curve characteristic, such as a sine wave, to detect undersupply or oversupply, allowing for automatic corrective adjustments to ensure optimal system supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pump delivers at high pressure and flow rate to ensure adequate supply, then the heating system is reliably supplied, but energy is wasted and noise increases when supply exceeds requirements
Solution Approach 1:
The control method uses feedback from the flow rate sensor to continuously monitor actual delivery and compare it with the required delivery profile. Based on this feedback, the pump speed is automatically adjusted to match actual system needs, preventing both undersupply and oversupply conditions that waste energy
Solution Approach 2:
The pump operates with dynamically adjustable speed rather than fixed speed, allowing it to adapt its delivery characteristics in real-time to match the varying thermal demands of the heating system, thereby avoiding energy waste during periods of reduced demand
2Loss of energy
If the pump speed is reduced to save energy, then energy efficiency improves, but the heating system may experience temporary undersupply
Solution Approach 1:
The system continuously monitors actual flow rate via sensor feedback and compares it with the required delivery profile. When undersupply conditions are detected (actual flow falls below required flow), the control automatically increases pump speed to restore adequate supply, ensuring reliability while maintaining energy efficiency during normal operation
Solution Approach 2:
The control system uses a predetermined delivery profile that anticipates system requirements. By comparing actual delivery against this profile in advance, the system can take preliminary corrective action by adjusting pump speed before undersupply conditions fully develop, preventing reliability issues while optimizing energy use
3Ease of operation
If conventional control methods are used without flow monitoring, then the system is simpler to operate, but undersupply or oversupply cannot be reliably detected and corrected
Solution Approach 1:
The system performs self-diagnosis and self-correction by automatically comparing sensor-measured flow rate against the required delivery profile and adjusting pump speed accordingly. This eliminates the need for manual intervention or complex operator judgment while ensuring reliable detection and correction of supply issues
Solution Approach 2:
The patent replaces manual monitoring and adjustment mechanisms with automated electronic control and sensor-based flow measurement. This substitution maintains ease of operation by eliminating manual intervention while dramatically improving supply accuracy through continuous automated monitoring and adjustment
Data Source
Figure 1~3
Figure 4~6
AI summary
The invention relates to a method for controlling a variable-speed heating circulating pump in a heating system, the flow resistance of which varies depending on the room temperature, in which the time profile of the delivery rate (1) or a pump variable linked to the delivery rate is recorded and determined on the basis of the recorded variable whether an adequate supply or an under- or oversupply of the heating system by the pump takes place, with a determined under- or oversupply, the pump is automatically controlled to correct it (Fig. 1).