Abstract

Full-scale tests of recuperative heat exchangers of autonomous ventilation units of a new design were carried out in order to determine the efficiency of heat recovery in them. As a result of the tests, it was found that the efficiency of heat recovery in such recuperative heat exchangers varies from 40 to 70 %, depending on the initial parameters of the supply and exhaust air. It was also found that in order to achieve the same heat recovery effect, it is advisable to use the construction of heat exchangers with corrugated mesh than the construction with corrugated plates because the first construction with a comparable heat recovery effect provides up to one and a half times lower aerodynamic drag. During the tests was also made an approbation of a new protection scheme for recuperative heat exchangers against freezing.

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