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La Pelota - Milan
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Università Milano - Bicocca
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Club House
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Sala regia
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Prove di laboratorio
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Chiesa di San Rocco
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Reduction of noise generated by HACV plants installed on the buildings of the “Università degli Studi Milano-Bicocca”
HACV plants (Heating, Air Conditioning and Ventilation)
installed on the roof of the sections of the “Università
degli Studi Milano-Bicocca” generated disturbing noise
that propagates into the neighbouring residential
buildings. The situation of acoustical pollution was
made very complex for the peculiar characteristics of
the noise sources and receptors. HVAC systems installed
on each building of the University Area were
heterogeneous (as regards typology, mechanical size,
working conditions), were located on a large area
according to a very complex layout. Disturbed receptors
were also large and heterogeneous, as regards placing
relative to the noise sources and noise propagation
phenomena involved. Experimental acoustical
characterisation of HAVC system components, carried out
by pressure and power sound measurements, allowed the
identification of the primary and most important noise
sources, as regards absolute noise levels and also plant
layout and positions relative to the receivers.
Simultaneous noise immission measurements, performed in
several residential houses and critical positions
located into the areas near the plants, allowed the
valuation of the single source contribution to the
global noise level immission.
Experimental measurements allowed also identification of
plant components that need to be treated for reducing
generated noise to the standard rated values.
Ray-tracing based numerical code was used for the
simulation of the generated acoustical field and for the
predictive valuation and optimisation of corrective
actions. |
