Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/46443
Title: HVAC ductwork: Constant-injection tracer-gas assessment of airtightness
Authors: Cheong, K.W. 
Issue Date: 1998
Source: Cheong, K.W. (1998). HVAC ductwork: Constant-injection tracer-gas assessment of airtightness. Building Services Engineering Research and Technology 19 (3) : 171-174. ScholarBank@NUS Repository.
Abstract: Constant injection of tracer gas was used to determine the airtightness of a straight length of 300 X 300 mm square duct in a laboratory setting. Holes are preformed in the ductwork which is connected to a fan with variable speed control to simulate leakages. The holes can be sealed with rubber bungs to simulate an airtight ductwork. 'Stationary' and 'mobile' methods have been developed. The stationary method is suitable for conditions where the locations of the leaks in the ductwork is known. The 'mobile' method is used to determine the airtightness of ductwork without any prior knowledge of the locations of leaks. Both methods were found capable of locating the leaks and of determining the leakage rate of the ductwork without disrupting the operation of the HVAC system. Algorithms were established for leakage rates in terms of airflow rates and for leakage rates in terms of pressure drops.
Source Title: Building Services Engineering Research and Technology
URI: http://scholarbank.nus.edu.sg/handle/10635/46443
ISSN: 01436244
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

Page view(s)

67
checked on Jan 19, 2018

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.