Assembly for ventilating a room, in particular a laboratory room
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Solution Overview
Problem
Existing ventilation systems for laboratory rooms require high energy to mix cooled fresh air with rising warm air, increasing the energy demand for air supply.
Innovation Solution
A ventilation arrangement featuring a supply air duct with lateral air supply sections and an exhaust air duct forming an air roll, combined with slit-like openings in work tables to guide warm air upwards, reducing mixing with cool air and lowering energy requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cooled fresh air is supplied into the room and mixes with rising warm air, then ventilation effectiveness is improved, but energy requirement increases
Solution Approach 1:
The invention extracts the warm air rising from under the work tables through dedicated extraction openings in the table rear panels, separating it from the cool fresh air supply path. This prevents mixing of the two air streams, allowing the cool fresh air to be supplied directly to the breathing zone without the energy penalty of heating mixed air, thus reducing overall energy requirements while maintaining ventilation effectiveness
Solution Approach 2:
The ventilation system is segmented into distinct zones: cool fresh air supply sections, warm air extraction sections, and transition zones. The work tables act as physical separators that divide the room into areas with different air characteristics, enabling independent control and optimization of each zone's air handling, thereby improving ventilation efficiency while reducing energy consumption
2Productivity
If air roll is formed above the aisle area, then air circulation is improved, but mixing of cool and warm air increases
Solution Approach 1:
The invention introduces transition zones with adjustable air permeability between the cool fresh air supply areas and warm air extraction areas. These transition zones act as intermediaries that allow controlled air exchange while maintaining the integrity of the air roll structure, preventing excessive mixing while preserving the beneficial air circulation pattern
Solution Approach 2:
The air permeability of the central separating section and transition zones can be dynamically adjusted based on operational conditions. This allows the system to adapt the degree of air mixing according to thermal loads and ventilation requirements, optimizing the balance between air circulation effectiveness and energy conservation
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 reduces the energy needed for air supply by minimizing the mixing of cool and warm air, enhancing the efficiency of the ventilation system.
Implementation Method 1
an air roll or air vortex is formed on both sides of the aisle area
Implementation Method 2
warm air from the area under the table top, which is caused, for example, by electrical devices
Data Source
Figure 1
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AI summary
An arrangement for ventilating a room which has an aisle area bounded on both sides by worktables, with a supply air duct arranged above the aisle area for supplying fresh air into the room and an exhaust air duct arranged above it for removing exhaust air from the room, wherein the supply air duct comprises two lateral air supply sections or slot diffusers and a substantially airtight central partition, and the exhaust air duct has two slot-like extraction openings extending substantially parallel to the supply air duct, which are arranged in the area of the ceiling of the room, such that an air current is formed on both sides of the aisle area, through which supply air heated in the area of the worktables passes vertically into the area of the ceiling of the room, is characterized in that at least one of the worktables has a slot-like opening in the area of its rear side.through which warm air from the area below the tabletop can flow upwards.