Performance comparison of axial fan and fan-filter unit (FFU) type clean rooms by CFD

Shih Cheng Hu*, Yew Khoh Chuah, Shen Chiang Huang

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

14 Scopus citations


The operational characteristics of two types of unidirectional clean room recirculation systems (i.e., an axial type clean room and a fan-filter unit (FFU) type clean room) were investigated and compared numerically. The fan performance curves and the flow resistance curves of system components were directly incorporated into the computational fluid dynamics (CFD) analysis in this study. Thus, the system operation was calculated without need of iterations for the airflow and the pressure within the enclosure to match the fan's characteristics. The fan energy was similarly incorporated into the model in order to determine the power consumption. The results show that the performance of the FFU system is generally superior to that of an axial fan system when considering factors such as uniformity of the ULPA (ultra low penetration air) filter face velocity, deflection angle of airflow in the working zone, and energy consumption.

Original languageEnglish
Pages (from-to)1014-1022
Number of pages9
JournalASHRAE Transactions
Volume108 PART 1
StatePublished - 2002
Externally publishedYes
Event2002 ASHRAE Winter Meeting - Atlantic City, NJ, United States
Duration: 13 01 200216 01 2002


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