Abstract:

Objective To address the conflict between sealing for noise control and ventilation for heat dissipation of dust collectors installed within confined ventilation laboratory spaces, a design methodology was developed based on acousticthermal synergy.

Methods A parameterized optimization model was established under the dual constraints of“minimum required airflow”and“composite transmission loss”. Numerical simulations combined with field measurements were conducted to compare the effects of different silencer configurations, baffle thickness, and layout on both fluid resistance and acoustic performance.

Results The optimal silencer-ventilation assembly consisted of a resistive plate silencer with an effective length of 1 000 mm, a baffle thickness of 60 mm, and baffles arranged in a parallel, uniformly distributed pattern along the short side. Under this configuration, the theoretical composite transmission loss reached 29.6 dB while maintaining a total system pressure loss of 13.8 Pa. After installation, the noise level at the dust collector outlet decreased from 76.9 dB(A) to 53.1 dB(A), and the heat dissipation performance satisfied the design requirements after 8 h of continuous operation.

Conclusions The parameterized optimization method based on the acoustic-thermal coupling mechanism enables synergistic optimization of noise reduction and heat dissipation in confined spaces and demonstrates considerable potential for engineering applications.