Pulsed Room Ventilation Control for Comfort Bands and Low Energy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for heating, cooling, and ventilating rooms often fail to efficiently meet pre-specified comfort criteria while minimizing energy costs, particularly in systems that need to condition multiple rooms.
Innovation Solution
A method utilizing a primary ventilation system with closed-loop and open-loop control devices that regulate air flow and temperature through pulsed operation, minimizing energy usage by adjusting air volume flow based on real-time comfort variable measurements and setpoints, and incorporating energy recovery and treatment systems to optimize room comfort without excessive energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous air flow is supplied to maintain room comfort variables, then comfort criteria are met, but energy consumption increases
Solution Approach 1:
The system implements periodic pulsed operation of the ventilation system, switching between active and inactive states. During active periods, air flow is supplied to adjust room comfort variables; during inactive periods, air flow is minimized or stopped when comfort criteria are already met. This periodic action allows the system to maintain comfort reliability while significantly reducing continuous energy consumption.
Solution Approach 2:
The system continuously monitors room comfort variables (temperature, humidity, air quality) and uses this feedback to dynamically adjust ventilation operation. When measured values indicate comfort criteria are satisfied, the system reduces or stops air flow; when criteria are not met, the system activates ventilation. This feedback mechanism ensures comfort reliability is maintained only when necessary, minimizing unnecessary energy consumption.
2Use of energy by moving object
If air flow is minimized to reduce energy usage, then energy costs decrease, but room comfort variable control precision deteriorates
Solution Approach 1:
The system dynamically adjusts air flow characteristics based on real-time room conditions. Rather than maintaining a fixed minimal air flow, the system varies ventilation intensity and timing to precisely achieve target comfort variables. This dynamic adjustment allows the system to use minimal energy while maintaining precise control over temperature, humidity, and air quality within specified comfort bands.
Solution Approach 2:
The system changes operational parameters (air flow rate, supply air temperature, pulse duration) to achieve optimal balance between energy consumption and comfort precision. By adjusting these parameters based on measured room conditions and predicted future states, the system maintains precise comfort variable control while minimizing energy usage through optimized parameter selection rather than continuous high-level operation.
3Reliability
If multiple rooms are conditioned independently, then individual room comfort is optimized, but system complexity increases
Solution Approach 1:
The system uses a single centralized control device that performs multiple functions: it monitors and controls comfort variables in multiple different rooms, predicts future states for each room, and coordinates pulsed ventilation operations across all rooms. This universal control approach allows individual room comfort optimization without requiring separate independent control systems for each room, thereby reducing overall system complexity while maintaining individual room performance.
Data Source
AI summary
An appropriately treated flow of air is supplied to a room in an automatically executed pulsed operation, in which the air flow is alternately switched on and switched off. The air flow is switched off independently of the room usage state if the regulated room comfort variables lie within a respectively assigned comfort band. If at least one of the regulated room comfort variables lies outside the comfort band assigned to it, the flow of air minimized in respect of its volume is supplied to the room. This means that ventilators used for the exchange of air will be operated at the lowest possible speed, optimized in respect of time and thereby with high energy efficiency.