The performance analysis on a novel purification-cleaning trombe wall based on solar thermal sterilization and thermal catalytic principles

Abstract

Trombe wall is a widely used solar passive system, while up to now, the utilization on recovered heat is single and inefficient. Meanwhile, the indoor released volatile organic compounds (VOCs) and the bioaerosols formed by bacteria or virus from air-conditioning system and other pollution sources flow into the indoor environment to cause human diseases. Therefore, a novel purification-cleaning Trombe wall based on the thermal sterilization and thermal catalytic principles was proposed, and the performances of space heating, formaldehyde degradation and thermal sterilization were investigated. Main results obtain follow: (1) The average daily air thermal efficiency was 0.46. (2) For formaldehyde inlet concentration of 600 ppb, the average formaldehyde single-pass ratio and total generated volume of clean air are 0.35 and 46.69 m3/(m2·day), respectively. (3) Five kinds of bacteria (E.coli, L.monocytogenes, L.plantarum, S.Senftenberg and S.cerevisiae) are fully thermal inactivated for several hours, the total generated volume of clean air are 94.01, 86.51, 100.70, 94.95, and 100.10 m3/(m2·day), respectively. (4) The purification-cleaning Trombe wall performs the excellent energy saving and purification performances in heating seasons. (5) The works could provide possible supports to the prevention and control of COVID-19.