Method for venting the heat transfer medium of heating devices
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Solution Overview
Problem
Existing venting programs for heating devices with helically coiled heat exchangers are inefficient as they are based on the worst-case scenario, resulting in prolonged commissioning times, as they do not adapt to the actual amount of air bubbles present, leading to unnecessary extended venting durations.
Innovation Solution
A method that measures and compares pressure or volume flow parameters cyclically during the venting process, forming a quotient to assess the deaeration progress, and terminates the process when the quotient exceeds a threshold, allowing for different pump speeds to optimize bubble separation, ensuring efficient air removal without premature termination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed time-controlled venting program is used based on worst-case scenario, then air bubbles are reliably removed from the heat exchanger, but the venting duration is unnecessarily extended for most installations
Solution Approach 1:
The patent implements a feedback mechanism by cyclically measuring pressure or volume flow parameters during the venting process and comparing them to previously measured values. The venting program terminates when the quotient of parameter differences exceeds a threshold value, allowing adaptation to actual air bubble quantities rather than using fixed worst-case timing.
Solution Approach 2:
The venting program transitions from a static, fixed-duration approach to a dynamic, adaptive process. The termination criterion dynamically adjusts based on real-time measurements of pressure or volume flow changes, enabling the system to respond to actual venting progress and terminate early when air bubbles are sufficiently removed.
2Loss of time
If the venting program is terminated early to reduce commissioning time, then time is saved, but air bubbles may remain in the heat exchanger causing local overheating
Solution Approach 1:
The feedback mechanism continuously monitors pressure or volume flow parameters to detect when air bubbles have been sufficiently removed. The threshold-based termination criterion ensures that venting continues until the actual venting progress indicates adequacy, preventing premature termination that would leave harmful air bubbles in the system.
Solution Approach 2:
The patent replaces empirical, experience-based venting timing with an objective, measurement-based termination criterion. By using quantitative pressure or volume flow measurements and their quotients, the system objectively determines venting completion rather than relying on fixed time schedules or subjective judgment.
3Productivity
If different pump speeds are used during venting, then bubble separation effectiveness is optimized, but the control complexity increases
Solution Approach 1:
The venting program uses dynamic pump speed adjustment with multiple phases at different speeds. This allows optimization of bubble separation for different bubble sizes and distributions while maintaining manageable control through a structured phased approach that repeats with different speeds until termination criteria are met.
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 significantly reduces the venting duration by adapting to the specific conditions of each installation, ensuring effective air removal and reducing the overall commissioning time of heating devices.
Implementation Method 1
a pump (5) which conveys the heat transfer medium (60)
Implementation Method 2
a vent (3) for separating gas (62) from the heat transfer medium (60)
Data Source
Figure 1~2
AI summary
The invention relates to a method for venting the heat transfer medium of a heating device (1). According to the invention, the pressure or the volume flow is determined in a venting program. If the instantaneous gradient or the gradient related to the start of the measurement exceeds a threshold value, the venting program is terminated.