Heating System Balancing Using Dynamic Hydraulic Modeling
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Solution Overview
Problem
Existing heating systems face inaccuracies in balancing due to assumptions of static conditions, neglecting variations in hydraulic resistance and pump characteristics over time, leading to inefficiencies and suboptimal performance.
Innovation Solution
A method utilizing a handheld communication device app to measure and adjust balancing valve settings based on real-time hydraulic modeling, accounting for changes in system parameters, including hydraulic resistances and pump characteristics, to achieve precise flow adjustments and system balancing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If prior art balancing methods are used based on static conditions, then the balancing process is simple, but the accuracy of flow adjustment deteriorates due to variations in hydraulic resistance and pump characteristics over time
Solution Approach 1:
The patent applies dynamics by transitioning from static balancing assumptions to dynamic adaptation. The system continuously monitors actual flow rates and pressure differences, then adjusts balancing valve settings in real-time to compensate for changes in hydraulic resistance and pump characteristics. This dynamic approach ensures accurate flow adjustment despite system variations over time.
Solution Approach 2:
The patent implements feedback by measuring actual flow rates and pressure differences during operation, comparing these measurements with target values, and using the deviations to adjust balancing valve settings. This closed-loop feedback mechanism enables the system to maintain accurate flow distribution even when hydraulic conditions change due to wear or modifications.
2Reliability
If balancing valves are adjusted based on initial system conditions, then the setup process is quick, but the system performance deteriorates as hydraulic resistance and pump characteristics change due to wear and modifications
Solution Approach 1:
The system continuously monitors flow rates and pressure differences, providing real-time feedback on actual system performance. This feedback enables the system to detect deviations from optimal operation caused by wear or modifications, and automatically adjust balancing valve settings to maintain consistent performance without requiring manual rebalancing.
Solution Approach 2:
The system performs self-adjustment by automatically modifying balancing valve settings based on measured performance data and target flow requirements. This self-service capability maintains reliable system performance over time without requiring external intervention or manual rebalancing, thereby avoiding time loss while ensuring performance consistency.
3Productivity
If the pump pressure is increased to ensure adequate flow, then the flow rate improves, but the energy consumption increases and return temperature becomes insufficiently low
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting balancing valve settings based on measured flow rates and pressure differences. Instead of increasing pump pressure, the system modifies the hydraulic resistance distribution across different circuit branches to achieve optimal flow rates. This approach maintains adequate productivity while reducing energy consumption and ensuring sufficiently low return temperatures for condensing boiler efficiency.
Solution Approach 2:
The system applies local quality by individually adjusting flow distribution to each heating circuit based on its specific requirements and actual performance. Rather than uniformly increasing flow throughout the system, the patent selectively optimizes flow in each branch, maintaining necessary productivity in critical areas while minimizing overall energy consumption and preserving low return temperatures.
Data Source
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AI summary
A method of balancing a heating system (150) is described, wherein the heating system comprises: a flow system comprising a supply flow line (60) and a return flow line (70), a heat source (55) and at least a first pump (10) coupled to the flow system and pumping fluid through the heat source to the flow system, and a plurality of hydraulic lines (L 1 -L n ) between the supply flow line and the return flow line, at least a number of which have a heating element (H 1 -H n ) with a dedicated balancing valve (V 1 - V n ) and optionally a regulation valve (W 1 -W 2 ). The method comprises the steps of: A) carrying out one or more measurements for each of the hydraulic lines by opening one hydraulic line only and determining a flow rate (q) through the pump and a pressure difference (Δρ) across the pump, B) establishing a hydraulic model for at least a part of the heating system based on the determined flow rate and pressure difference from at least two measurements from step A), and at least one additional measurement for at least two hydraulic lines from step A), C) specifying a desired flow rate (q̅ j ) for each of the hydraulic lines, and D) adjusting one or more of the dedicated balancing valves (V 1 -V n ) in order to meet the desired flow rate (q̅ j ) for each of the hydraulic lines by using the hydraulic model.