Studies on design for control optimization of air-conditioning (a/c) system for better performance in Hong Kong are reported in this thesis. Typical plant configuration data was collected from an in-depth survey of a/c systems and control used in Hong Kong. Control performance has been used for the first time as an objective for optimizing a/c system designs. The study investigates and illustrates that optimization of a/c systems for application in the Hong Kong by simulation is promising and flexible. The accuracy of simulation is enhanced by using the survey data. The survey shows that some a/c control systems and their control strategies are not well considered in the design stage and their operation and set-up are not properly addressed. Hence, there exists optimization opportunities in the a/c system design and control strategies for a/c systems used in Hong Kong. Parameters affecting the control performance of a/c systems were investigated by carrying out experiments. Identified parameters are the objective function of optimization, controller settings, control valve and drive and, in case of direct digital control, sampling rate. The influence of these factors on the control performance is an essential consideration for the entire optimization process. Strategies in applying the findings in optimizing an a/c system for control performance by simulation were developed and suggested. This study provides platform for further simulation study of optimization in both methodologies and control strategies for a/c system design and operation.

The overheating problem experienced during Islamic pilgrimage in recent years has caused serious thermal discomfort and a number of mortalities among pilgrims coming from various parts of the world to perform the annual event at Makkah in Saudi Arabia. This research aims to investigate the real dimension of thermal discomfort experienced inside the pilgrimage tents. The back bone of this task was the data collected from the field investigations during the Hajj season of 1989, including climatic measurements taken inside the tents for the first time during the Hajj season. The investigations also included a subjective evaluation for internal thermal conditions by the pilgrims from Europe, the Middle East, and South East Asia. This research also attempts to identify passive and natural cooling guidelines that are applicable to the tent's design. The author tested sets of experiments aimed to measure the thermal effects of some of the natural cooling techniques on pilgrimage tents at Makkah. The research concludes with design guidelines to improve the thermal quality of the pilgrimage tent. The recommended guidelines were based on the experimental results and practical examples of cooling strategies applied to tents in similar hot climates.

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Thesis (Ph.D.)--University of Nebraska-Lincoln, 2008. / Title from title screen (site viewed Mar. 31, 2009). PDF text: xxv, 259 p. : ill. (chiefly col.) ; 7 Mb. UMI publication number: AAT 3336554. Includes bibliographical references. Also available in microfilm and microfiche formats.

Thesis (M.S.)--Rochester Institute of Technology, 1990. / Typescript. References: leaf 324.

Thesis (M.A.Sc.)--Dalhousie University (Canada), 2007. / Includes bibliographical references.

Thesis (M. Phil.)--Hong Kong University of Science and Technology, 2002. / Includes bibliographical references (leaves 61-63). Also available in electronic version. Access restricted to campus users.

Thesis (M. Phil.)--University of Hong Kong, 1997. / Includes bibliographical references (leaf 250-254).