Vodice The Imperial Park Hotel 26 - 28 March 2025
27 th International Conference on Heating, Cooling and Air-conditioning
ABSTRACT
PAPER
prof. dr. sc. Antonio PETOŠIĆ University of Zagreb Faculty of Electrical Engineering and Computing Unska ulica 3 10 000 Zagreb Croatia e-mail: antonio.petosic@fer.unizg.hr
MP4
PRESENTATION VIDEO
He was born on 4 February 1979 in Požega, where he graduated from the Natural Sciences and Mathematics High School. He graduated in 2002 from the Faculty of Electrical Engineering and Computing of the University of Zagreb (FER), where he also received his PhD in 2010. Since 2002, he has been working at the FER's Department of Elec- troacoustics, where he is currently a full professor. In addition, since 2014, he has been the leader of the three-year establishment research project 'Ultrasonic system for determining the properties of complex materials in a nonlin- ear excitation mode'. He participates in teaching as a performer and co-lead in several subjects, and in his scientif- ic research work he deals with the application of ultrasound in medicine and technology, electromechanical and acoustic characterization of ultrasonic transducers in different operating modes, and also studies the phenomena of linear and nonlinear acoustics, spatial acoustics, measurements of acoustic power of devices, measurements and calculations of sound insulation of housings, dampers in air conditioning systems, etc. He participated in in- terlaboratory comparisons in the field of airborne and impact sound insulation measurements organized by the Croatian Acoustical Society. He also participates in the work of the Croatian Standards Institute and the Croatian Accreditation Agency as an expert in the field of environmental noise and sound insulation measurements. He is the author and co-author of numerous papers published in international scientific journals and at international conferences and a reviewer in several international scientific and professional journals and at two international conferences. During his studies, he received the 'Josip Lončar' bronze plaque for exceptionally successful studies. He speaks English and German.
doc. dr. sc. Mia SUHANEK University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, Croatia Andrija PERŠUN University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, Croatia Zvonko LELAS University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, Croatia
PRACTICAL CONSIDERATIONS FOR MODELLING NOISE LEVELS FROM HVAC SYSTEMS
This paper outlines the fundamental principles for modelling heating, cooling, and other ventila- tion/pipe systems using available software tools, highlighting key diFerences across various acous- tic propagation models (ISO 9613-2:2024, CNOS- SOS-EU, HARMONOISE). The primary challenge is obtaining accurate input acoustic data for diFer- ent types of heating and cooling devices. In some cases, weighted sound power levels are provided, while in others, A-weighted sound pressure levels at 1 meter are given for devices operating at max- imum capacity, often without a measured noise
spectrum, which typically varies with fan speed. Several practical modelling examples are dis- cussed, focusing on heating and cooling devices located near residential areas, incorporating rel- evant airborne and structural sound propagation eFects and final assessments. Additionally, noise reduction measures, for both noise and pressure drop, are presented to ensure compliance with Croatia's rigorous regulations, which generally mandate that residual noise levels must not ex- ceed an increase of +1 dBA.
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4th Thematic Section - ENERGY EFFICIENCY AND RENEWABLES
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