Computer simulation of indoor air quality

Pao Yue-kong Library Electronic Theses Database

Computer simulation of indoor air quality

 

Author: Tse, Yip-kei
Title: Computer simulation of indoor air quality
Degree: M.Sc.
Year: 1998
Subject: Indoor air pollution -- Computer simulation
Air quality management -- Computer simulation
Hong Kong Polytechnic University -- Dissertations
Department: Multi-disciplinary Studies
Dept. of Civil and Structural Engineering
Pages: 1 v. (various pagings) : ill. ; 30 cm
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b1425836
URI: http://theses.lib.polyu.edu.hk/handle/200/1966
Abstract: There is an increasing number of people requesting information and assistance on health and comfort concerns related to indoor air quality. Simulation using specially-designed computer programme will be helpful to get a better understanding of how pollutants are distributed in indoor environment. A literature review was conducted to collect available information on residential and commercial indoor air quality (IAQ) including the heating, ventilating, and air conditioning systems (HVAC), the common indoor air pollutants, typical indoor sources and the available mitigation measures as the initial task of this project. The findings was used as the basis of computer simulation. The methodology and results of an in-situ measurement conducted by a local consultant company at the test office were presented and reviewed. Measurements on carbon dioxide and carbon monoxide were carried out to supplement the previous findings, while additional samples were taken to verify the levels of formaldehyde and ozone. It was concluded that the concentration of the samples of the six concerned pollutants did not exceed the Interim Indoor Air Quality Guideline proposed by HKEPD. The two sets of results were then investigated and arranged to generate a preliminary pollutant profiles of the test premises. Indoor Air Quality Simulator for Personal Computer (IAQPC) was developed at USEPA by L.E. Sparks to address the indoor air quality. The functions of the programme were introduced and its algorithm was discussed with the aid of mathematical formula. The effects of changing various input parameters was then studied. The results of analysis indicated that the programme responded well in accordance with the engineering principles. In this stage simulation of a real premises was carried out basing on the configuration, partitioning and the internal airflow of the office. The results of simulation was examined along with that obtained from the in-situ measurement. Generally speaking, most of the data had the same order of magnitude with that of measurement. Finally various aspects of IAQPC including the user-friendliness, accuracy, output ability, sensitivity, practicability and limitations are discussed. Recommendations on programming techniques to minimize the time required, to avoid the hanging and to increase the accuracy of simulation results were given at the end of this dissertation.

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