Strategies for Air Distribution and Acoustics Improvements in an Multi-Purpose Gymnasium: A Case Study

Abstract

This paper proposes an overall strategy for various demands to satisfy diverse occupants in a large shared space A large gymnasium in NCKU is selected for the case study Practical scenarios are concerned Both acoustic condition and flow distribution are taken into consideration to support differentiated extracurricular events and to guarantee the air velocity for badminton Firstly field measurements were conducted to diagnose current performance The reflective interior materials and large volume approximately 55 000m3 lead to a 5-second reverberation time at 500Hz; thus make the clarity unsuitable for fundamental use Besides current air conditioning systems appear out of order causing complex flow distribution which is not suitable for small ball sports In addition numerical simulations were utilized and validated for further studies In the acoustic place this paper focuses on reverberation time control and clarity improving The results show that T20 is reduced to about 2 seconds (500Hz) after MPPs are implemented and a favored clarity condition (C50 C80 and STIPA) can be provided after electro-acoustic strategies are installed On the other hand this study examines the effectiveness of different air-let configurations to check whether air velocity temperature and CO2 concentration fit the users’ comfort The results show that the air velocity is controlled below 0 2m/s for badminton and below 0 35m/s for audience area All in all this study provides a guidance for accommodating diverse preferences depending on different scenarios for acoustic and flow field in a large gymnasium

Date of Award	2020
Original language	English
Supervisor	Yaw-Shyan Tsay (Supervisor)