Active supply diffuser application in all-air heating systems

Abstract

Substantial reductions in energy use can be achieved by promoting low energy building technologies such as all-air systems. There is an idea that integrating active supply diffuser with all-air systems can potentially improve their performance. This paper numerically investigated the performance of an all-air heating system equipped with an active supply diffuser in a cell office, constructed based on Norwegian passive house, in terms of indoor air quality and thermal comfort of occupants. Simulations were performed using commercial Star-CCM+ software. The numerical results were validated using the available experimental data on the active supply diffuser from an office. The results showed that adopting active supply diffuser can avoid temperature stratification, which is the main reported issue in heating application of conventional all-air systems, and provide the thermal comfort with PPD ≤ 7% in most part of occupancy zone.