HVAC aims to make the thermal sensation more pleasant. We want to avoid drafts, to regulate the humidity and to reduce the effects of unbearable heat due to solar radiation with regards to the energy consumption.
Streamlines exiting a supply grille
Streamlines entering an exhaust grille
The fan is usually the loudest component. The noise travels through the pipe-works and leaves through the supply grills, spreading into the room. The noise level of the fan is evaluated by the manufacturer. Usually it is necessary to install sound absorbers; the choice of sound absorber is based on assumptions and experience.
The ventilation or the decontamination of a room or a
building is important enough that it should be drafted at the beginning of the
project. It is required to perform 3D Computational Fluid Dynamics
calculations: this is the only way to estimate the volume flow and pressure
drops, and to visualize the flow and the dissemination of the contaminants.
Using these results, the optimization potentials of the initial climatisation
are visible. The optimum climatisation should be ensured and realized with a
series of CFD calculations.
The most common causes for imprecision of the calculation are leakage of the room or a difference in construction and operation of the climatisation system.
The principle of precaution against infections, microbiological or bacterial contamination and pollutants requires the installation of a clean room. The proven method is to blow air from the ceiling and to withdraw it from the floor or from the base of the walls. This method should be implemented if the architecture does not proscribe it. The simulation makes it possible to protect the designated clean area from impurities and/or to evacuate any impurities produced in the room. The final option to be considered is the placing of barriers in the room to protect from contamination.
The pressure in the room must set to a precise value, for example minus 50
Pa. Therefore some regulator valves must be used; the pressure throttlings
generate additional noise. These valves must be set differently according
to the seasons.
CFD simulations are required during the planning phase for compliance with the contamination classes.
Visualisation of a turbulent flow
We are a consulting company
specialised in 3D thermal and flow calculations; for ventilation we always use
the commercial tool for cartesian mesh FloEFD from Mentor Graphics; we can
also generate a 3D-CAD model. We offer the analysis of the acoustics in order
to evaluate the noise level in the room.
Due to a flexible and fast mode of operation as well as the use of modern tools, we can make you offers made to measure to a competitive price.
Let us advise you:
Phone: +49 30 2084 8483
or write us an E-Mail