Boiler Stage Change Control via Fan RPM Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional boilers for heating and hot water frequently change stages and experience calorie drop due to variations in water flow rate and temperature, leading to inefficient mixing control operations.
Innovation Solution
A boiler with a controller that manages stage changes by tracking the frequency of burner stage changes and adjusting the blowing fan's RPM and burner operation to minimize calorie loss and stabilize temperature, preventing frequent stage changes and calorie drops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If mixing control operation is performed by adjusting the mixing rate of hot water and direct water, then the temperature of supplied hot water is adjusted, but the control calorie variation increases due to rapid temperature change
Solution Approach 1:
The controller performs preliminary action by adjusting the blowing fan RPM and burner operation before the mixing control operation causes rapid temperature changes. This proactive adjustment stabilizes the calorie output and prevents the calorie variation that would otherwise occur during mixing control transitions.
Solution Approach 2:
The controller continuously monitors the burner stage changes and hot water temperature, using this feedback information to dynamically adjust the blowing fan RPM and burner operation. This closed-loop control ensures that calorie output remains stable even when mixing control operations cause temperature fluctuations.
2Speed
If stage change control is not implemented, then the boiler responds quickly to temperature changes, but the stage changes frequently in the overlap section causing calorie drop
Solution Approach 1:
The controller implements preliminary action by detecting when the burner stage is about to change into the overlap section and proactively adjusting the blowing fan RPM and burner operation in advance. This prevents frequent stage changes and maintains calorie stability while preserving quick response capability.
Solution Approach 2:
The controller changes operational parameters (blowing fan RPM, burner power) dynamically based on the detected stage change frequency and overlap section conditions. This parameter adjustment stabilizes the burner operation and reduces frequent stage changes without sacrificing response speed.
3Loss of energy
If the blowing fan RPM is adjusted during stage change, then the calorie output is stabilized, but the control complexity increases
Solution Approach 1:
The controller performs self-service by automatically detecting stage changes and autonomously adjusting the blowing fan RPM and burner operation without requiring external intervention or complex external control systems. This maintains calorie stability while keeping the control system integrated and manageable.
Solution Approach 2:
The controller simplifies the control approach by focusing on adjusting key parameters (blowing fan RPM, burner power) based on straightforward stage change detection logic. This targeted parameter control achieves calorie stability without requiring overly complex control mechanisms.
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
The solution effectively stabilizes stage changes and maintains consistent calorie output, reducing temperature fluctuations and preventing unnecessary calorie addition, thus enhancing the boiler's efficiency and performance.
Implementation Method 1
a burner configured to generate a calorie necessary for producing hot water by burning air and gas
Implementation Method 2
information on a target RPM of the blowing fan which supplies the air to the burner
Implementation Method 3
heats water using high-temperature combustion gas
Implementation Method 4
heats water by using combustion heat generated in a heating process
Data Source
AI summary
Provided are a boiler and a method for stage change control of the boiler. The boiler includes a burner to generate a calorie necessary for producing hot water by burning air and gas, and a controller to perform a stage change control operation, when the number of times, in which the stage is changed, is equal to or greater than a reference number of times, for a predetermined time, based on information on occurrence of the change of the stage in the burner, while hot water is used.