Study of Internal Flow Heat Transfer Characteristics of Ejection-Permeable FADS

Kai Yang, Tianhao Shi, Tingzhen Ming (), Yongjia Wu, Yanhua Chen, Zhongyi Yu and Mohammad Hossein Ahmadi
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Kai Yang: School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China
Tianhao Shi: School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China
Tingzhen Ming: School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China
Yongjia Wu: School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China
Yanhua Chen: CITIC General Institute of Architectural Design and Research CO., Ltd., Wuhan 430014, China
Zhongyi Yu: CITIC General Institute of Architectural Design and Research CO., Ltd., Wuhan 430014, China
Mohammad Hossein Ahmadi: Faculty of Mechanical Engineering, Shahrood University of Technology, Shahrood 3619995161, Iran

Energies, 2023, vol. 16, issue 11, 1-20

Abstract: A fabric air dispersion system (FADS) is a type of flexible air supply system that integrates air transmission and distribution. This innovative system has the potential to address common issues such as uneven air supply and surface condensation, which are often associated with traditional ventilation systems. Existing numerical simulation studies on fiber ducts have encountered problems with mesh generation and simulation accuracy. This work develops a simulation method based on the equivalent discounting method to overcome these challenges. The proposed method is utilized to investigate the flow and heat transfer characteristics inside fiber ducts while also examining the effects of various shapes and opening configurations. The findings indicate that the temperature rise inside the duct is positively correlated with flow rate, with higher temperatures resulting from faster flow speeds. The temperature rise of FADS with four rows of openings increased by 0.4 k compared to other opening methods. Additionally, the study shows that increasing the number of rows of openings in the fiber duct leads to a faster decay of flow velocity and a higher temperature rise. At the same time, increasing the number of openings in the duct slightly reduces flow velocity while slightly increasing the temperature rise. The presence of more fiber duct elbows leads to greater local resistance, which accelerates the decay of the flow velocity and increases the temperature rise. Compared to the “1”-shaped FADS, the temperature rises of the “L”-shaped and “U”-shaped systems have increased by 0.9 k and 2.9 k, respectively.

Keywords: fiber duct; FADS; numerical simulation; flow field (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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