VAV Room Temperature Monitoring With Controllable Range Display
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Solution Overview
Problem
Current room temperature fluctuation control systems lack the ability to predict whether the temperature will remain within a controllable range, leading to potential deviations outside the manageable range.
Innovation Solution
A monitoring apparatus and method that display chronological room temperature changes and a bar graph indicating the controllable range, allowing for easier estimation of whether temperature fluctuation control can be performed within the range by calculating the bar graph's length using conversion rates based on heating medium flow rates and temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If room temperature fluctuation control is implemented to achieve energy saving, then energy consumption is reduced, but the room temperature may deviate from the controllable range over time
Solution Approach 1:
The monitoring apparatus performs preliminary assessment by calculating the controllable range based on current heating medium flow rate and temperature before temperature fluctuation control is executed. This allows prediction of whether future temperature changes will remain within controllable limits, enabling preventive action before temperature deviation occurs.
Solution Approach 2:
The system continuously monitors room temperature, heating medium flow rate, and heating medium temperature, then feeds this information back to recalculate the controllable range. This closed-loop feedback mechanism ensures that the system can adapt to changing conditions and maintain temperature within controllable limits while still achieving energy savings through fluctuation control.
2Use of energy by moving object
If room temperature set value is changed according to predetermined schedule, then energy saving is achieved, but prediction capability for future temperature status is lost
Solution Approach 1:
The system calculates the controllable range in advance based on current system parameters before scheduled temperature changes are executed. This preliminary calculation provides prediction capability about whether future temperature status will remain controllable, eliminating the information loss while maintaining energy saving benefits.
Solution Approach 2:
The monitoring apparatus adds a new dimension of information by displaying the controllable range as a bar graph alongside the room temperature timeline. This visual representation in an additional dimension provides intuitive prediction capability without interfering with the scheduled temperature fluctuation control for energy saving.
3Reliability
If complex monitoring parameters are tracked to ensure temperature control, then temperature reliability is improved, but ease of operation deteriorates
Solution Approach 1:
The monitoring apparatus extracts only the essential information needed for temperature control reliability - the controllable range - and displays it as a simple bar graph. Complex parameters like heating medium flow rate and temperature are processed in the background, while only the critical controllable range information is presented to the user, maintaining reliability while simplifying operation.
Solution Approach 2:
The controllable range is displayed as a bar graph in a visual dimension alongside the room temperature timeline. This graphical representation transforms complex numerical data into an intuitive visual format that is easy to interpret, improving ease of operation while maintaining comprehensive temperature control reliability.
Data Source
AI summary
A monitoring apparatus includes an information obtaining unit that obtains, from a target VAV air conditioning system to be monitored, a room temperature and a variable air volume; a room temperature display processing unit that displays, in a form of a graph, the room temperature obtained from the target VAV air conditioning system to be monitored; a controllable range calculating unit that calculates a length of a bar of a bar graph indicating a controllable range on the basis of the variable air volume; and a controllable range display processing unit that displays the bar graph including the bar having the length calculated by the controllable range calculating unit such that the bar graph is overlapped with the room temperature.