The comprehensive performance analysis on a novel high-performance air-purification-sterilization type PV-Trombe wall

Abstract

PV-Trombe wall is a superior system because it realizes space heating and electricity generation. However, the application on thermal energy is single. Besides, the indoor air pollution caused by volatile organic compounds (VOCs) and bioaerosols formed by bacteria or virus (COVID-2019) have been more and more serious. Thus, a high-performance air-purification-sterilization type PV-Trombe wall that meets electricity, heating, formaldehyde and bacteria removal fully driven by solar energy is proposed. The thermal, electrical and purification performances with different PV coverages are analyzed based on the experimental and modelling works. Main results are: (1) With PV coverage of 0, the air thermal efficiency and formaldehyde single-pass ratio are 0.46 and 0.35, respectively. Five kinds of bacteria are fully thermal inactivated. (2) The PV coverage plays an important role on the electrical, thermal and purification performances. With optimal PV coverage, the thermal and electrical efficiencies are 0.328 and 0.136, respectively. The generated clean air by removing formaldehyde and bacteria are 85.1 and 157.1 m3, respectively. (3) The total air heat intake and output electricity in Xining, Hefei and Beijing are 1301.2, 376.2, 932.6 MJ, and 171.8, 57.4, 120.9 MJ, respectively. The saving fresh air thermal energy are 396.6, 87.5 and 198.3 MJ, respectively.