Noise Control for Air-Cooled Heat Pump Units

Noise Source Analysis

• Equipment noise: Operating noise of screw compressors and aerodynamic noise from fan blade rotation.

• Vibration noise: Vibration of the units and fans transmitted through bases and supports, causing structural resonance and low-frequency noise.

• Airflow noise: Wind noise generated by airflow disturbance and eddies at air inlets and outlets.

• Transmission paths: Noise radiates directly through the air and spreads via the ground and pipelines.

Treatment Basis and Objectives

1. In accordance with national environmental quality standards for acoustics, emission standards for environmental noise from social life, and noise limit requirements for public places.

2. Treatment objectives:

• Noise around the units and inside the Youth Palace shall meet the standards without affecting teaching, activities and rest.

• Noise reduction shall not affect the heat dissipation, ventilation and normal operation and maintenance of the heat pump units.