Paper Conference

Proceedings of eSim 2016: 9th Conference of IBPSA-Canada


Prediction of thermal comfort, IAQ, and energy consumption in a dense occupancy environment with the under floor air distribution system

Ghassem Heidarinejad, Mohammad Hassan Fathollahzadeh, Hadi Pasdarshahri

Abstract: This study investigates an under-floor air distribution (UFAD) system with combined and separate return and exhaust air vents regarding thermal comfort, indoor air quality (IAQ), and energy consumption. UFAD system is used in a large indoor environment (dense occupancy). CFD methods are used to predict thermal comfort conditions, IAQ, and energy consumption in this space. Based on the results, swirl inlet diffusers can lead to an acceptable temperature gradient in the vertical direction. By precisely considering thermal comfort conditions, and IAQ made by swirl inlet diffusers, opting the upper boundary of the occupied zone (1.7m) for return air vent position (which is the optimum case study among all the examined case studies) can lead to the appropriate results. Moreover, the optimum return air vent position in this UFAD system can result to 10.5 percent reduction in the amount of energy consumption compared to the mixing ventilation system.
Pages: 580 - 584