Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/149649
Title: Experiments on and development of a flow oscillator for ventilation systems
Authors: Mok, Mei Ling
Keywords: Engineering::Mathematics and analysis::Simulations
Engineering::Mechanical engineering::Fluid mechanics
Issue Date: 2021
Publisher: Nanyang Technological University
Source: Mok, M. L. (2021). Experiments on and development of a flow oscillator for ventilation systems. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/149649
Project: B293
Abstract: Air conditioning systems have contributed to global warming. To reduce the consumption of fossil fuel and carbon emission, a flow oscillator is suggested to replace air conditioning vanes to facilitate flow mixing in a room. Replacing the active control of air conditioning vanes with a passive control of a flow oscillator will reduce the reliance on mechanics in terms of the movements of the vanes. This report studies the feasibility of implementing the flow oscillator into ventilation systems such as air conditioning systems to improve the mixing efficiency and the possibility of replacing the vanes. By further studying the flow oscillator, parameters that affects the flow oscillator are determined. Non-dimensional analysis is implemented to find the dominant parameters that influence the oscillation frequency. To verify the dimensionless equations obtained from the non-dimensional analysis, numerical simulation is used. The results indicated that for the oscillation in the study, the oscillation frequency increased linearly with the inlet mass flow rate and with differential inlet or outlet pressure. The mass flow rate also increases linearly with the differential pressure. The experiment results verified the numerical trends, but there were discrepancies of up to 40%. The non-dimensional study indicates that dimensionless equations, Strouhal number, and non-dimensional pressure were valid and can be used for geometrical changes in the dimensions. This study indicates that the flow oscillator can potentially be implemented for air conditioning systems in the future. Moving forward, this study can serve as a stepping stone toward the adoption of the flow oscillator into air conditioners to augment the mixing capacity and reduce the energy consumption.
URI: https://hdl.handle.net/10356/149649
Fulltext Permission: restricted
Fulltext Availability: With Fulltext
Appears in Collections:MAE Student Reports (FYP/IA/PA/PI)

Files in This Item:
File Description SizeFormat 
Meiling_FInal Year Report (B293) -190421.pdf
  Restricted Access
1.92 MBAdobe PDFView/Open

Page view(s)

138
Updated on May 20, 2022

Download(s)

11
Updated on May 20, 2022

Google ScholarTM

Check

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.