Experimental research on indoor secondary pollution and control technology of public buildings

Abstract

This paper gives a brief introduction on secondary pollution caused by central air-conditioning system of public buildings in cold region. Then, the feasibility analysis of humidity control of central air-conditioning system is conducted, which finds out that central air-conditioning system implementing humidity control can handle secondary pollution to some extent; but due to factors like the inadequate fresh air rate and restricted chilled water temperature, it cannot realize efficient control. The author proposes using activated carbon-nano-TiO2 photocatalytic composite purification technology to control secondary pollution caused by the system, and related tests are conducted. The results show that the compound purification unit can effectively purify VOCs and microbial pollution in sealed environment under certain conditions, and conditions including environmental temperature, ultraviolet intensity, air velocity, and initial pollutant concentration will influence the purifying performance. © Springer-Verlag Berlin Heidelberg 2014.