Investigations of Compact Recuperators Acoustic Properties

The article is devoted to solving the urgent task of increasing the efficiency of air distribution in a room. The aim of this work is the investigation of Prana recuperator acoustic properties at air jets leakage, which flow out from outlets under varying conditions. In this article relationship between such factors as a noise level, sound frequency and the different noise decrease measures at Prana recuperator action in a room has been determined. There are considered some sources of noise: Prana recuperator action, noise in a room and outside and aerodynamic noise of the air jet flowing out from the outlet. There have been designed the charts of sound level difference dependence from the sound’s frequency and noise level. Obtained curves were approximated by equations. Comparing charts for the different noise decrease measures at Prana recuperator action in a room, we shall note that noise level difference is the highest at using of the cover device. Installation of the Prana recuperator does not impair the sound-proofing ability of the structure to the air noise of traffic flows, and the installation in front of the Prana of acoustic screens does not give a tangible result.