Comparison of ventilation performance in an office room through big data simulation

Gang Zhao

doi:10.1117/12.2627991

11 March 2022 Comparison of ventilation performance in an office room through big data simulation

Gang Zhao

Proceedings Volume 12160, International Conference on Computational Modeling, Simulation, and Data Analysis (CMSDA 2021); 121600Z (2022) https://doi.org/10.1117/12.2627991
Event: International Conference on Computational Modeling, Simulation, and Data Analysis (CMSDA 2021), 2021, Sanya, China

Abstract

Based on big data simulation, three ventilation systems including mixing ventilation, displacement ventilation and diffuse ceiling ventilation are numerically simulated and compared in an office room. Ventilation performances of these three ventilation systems are obtained through analysing indoor air velocity distribution, temperature distribution, PMV, age of air and ventilation efficiency. Results show that the vertical temperature gradient of diffuse ceiling ventilation is 0.30 °C/m. Compared with displacement ventilation and mixing ventilation, the indoor vertical temperature gradient of diffuse ceiling ventilation is reduced by 3.95°C/m and 1.22°C/m, respectively. The indoor temperature distribution is relatively uniform, and there is no local thermal discomfort in the occupied zone. In addition, the indoor air velocity gradient of diffuse ceiling ventilation is very small, and there is no cold air draught even when the supplied air has high momentum. The indoor PMV is also within the requirement of regulations, and the thermal comfort can be greatly improved. The indoor air age of diffuse ceiling ventilation is 539 s, with the ventilation efficiency close to 1.0. Although it is less than that of displacement ventilation, the effects of ventilation and heat rejection are still excellent. This study can provide technical basis for the application of diffuse ceiling ventilation in practical projects.

Citation Download Citation

Gang Zhao "Comparison of ventilation performance in an office room through big data simulation", Proc. SPIE 12160, International Conference on Computational Modeling, Simulation, and Data Analysis (CMSDA 2021), 121600Z (11 March 2022); https://doi.org/10.1117/12.2627991

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available