Heating Circuit Flow Temperature Control for Boiling Prevention
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Solution Overview
Problem
Existing heating systems face limitations in maximum temperature difference between flow and return temperatures, leading to reduced heating output and increased calcification, which restricts ease of use and efficiency.
Innovation Solution
A method that measures return temperature and system pressure to dynamically determine a maximum temperature difference, allowing the flow temperature to be adjusted to prevent boiling, thereby enabling higher heating outputs and comfort while preventing system wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the maximum temperature difference between flow and return temperatures is limited to prevent boiling, then system reliability is improved, but heating output and user comfort deteriorate
Solution Approach 1:
The patent applies dynamics by making the maximum temperature difference dynamic rather than static. The control unit continuously adjusts the maximum temperature difference based on real-time measurements of return temperature and system pressure, allowing the system to operate at higher heating outputs when conditions permit (low return temperature, high pressure) while maintaining reliability when conditions require caution (high return temperature, low pressure).
Solution Approach 2:
The patent changes the parameter of maximum temperature difference from a fixed value to a variable determined by the control unit based on return temperature and system pressure. This parameter change enables the system to optimize heating output by increasing the temperature difference when safe, while preventing boiling when risks are present.
2Power
If the maximum temperature difference is increased to improve heating output, then user comfort is improved, but the risk of heating water boiling increases
Solution Approach 1:
The patent implements feedback by continuously measuring return temperature and system pressure, comparing these values against safety thresholds, and adjusting the maximum temperature difference accordingly. The control unit uses feedback from temperature and pressure sensors to dynamically control the heating output, preventing boiling while maximizing heating efficiency.
Solution Approach 2:
The patent applies preliminary action by proactively adjusting the maximum temperature difference before boiling can occur. The control unit predicts potential boiling risks by monitoring return temperature and system pressure trends, and preemptively reduces the temperature difference threshold to prevent harmful effects before they manifest.
3Device complexity
If a fixed maximum temperature difference is used to simplify control, then device complexity is reduced, but adaptability to different operating conditions deteriorates
Solution Approach 1:
The patent applies self-service by enabling the control unit to automatically determine and adjust the maximum temperature difference without requiring manual intervention or complex external control systems. The system monitors its own operating conditions (return temperature and system pressure) and autonomously optimizes the temperature difference parameter, achieving high adaptability with relatively simple self-contained control logic.
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 allows for higher heating outputs and improved user comfort by maintaining a higher temperature difference within safe limits, preventing heating water from boiling and minimizing system wear.
Implementation Method 1
The return temperature and the system pressure of a heating circuit are determined. A maximum temperature difference is determined as a function of the return temperature and the system pressure
Implementation Method 2
The return temperature and system pressure of the heating circuit are measured
Implementation Method 3
The flow temperature of the heating circuit is measured, and the resulting temperature difference between the flow and return temperatures is determined. The flow temperature is reduced if the temperature difference exceeds the maximum temperature difference
Data Source
Figure 1~2
AI summary
The invention relates to a method for controlling a heating circuit of a heating system (10), wherein a return temperature of the heating circuit is measured, a system pressure of the heating circuit is measured, a maximum temperature difference (22, dTMax) is determined as a function of the return temperature (TRück) and the system pressure (pSys), wherein the maximum temperature difference (22) describes the maximum permissible temperature difference between the return temperature and a supply temperature of the heating circuit, wherein a supply temperature of the heating circuit is measured and the existing temperature difference between the supply temperature and return temperature is determined from this, and wherein the supply temperature is reduced if the temperature difference exceeds the maximum temperature difference (22).