No description available.

Thesis (M. Eng. Sc.)--University of Adelaide, Dept. of Chemical Engineering, 1986. / Includes bibliographical references (leaves 276-279).

Thesis (M.S.)--Ohio University, November, 1992. / Title from PDF t.p.

Thesis (Ph. D.)--Columbia University, 1938. / Cover title. Vita. Bibliography: p. 50.

Thesis (M.S.)--California Polytechnic State University, 2009. / Title from PDF title page; viewed on September 23, 2009. Major professor: Jesse Maddren, Ph.D. "Presented to the faculty of California Polytechnic State University, San Luis Obispo." "In partial fulfillment of the requirements for the degree [of] Master of Science in Mechanical Engineering." "June 2009." Includes bibliographical references (p. 45-47). Also available on microfiche.

Thesis (Ph.D.) - Carleton University, 2007. / Includes bibliographical references (p. 209-229). Also available in electronic format on the Internet.

Master of Science / Department of Mechanical and Nuclear Engineering / Warren N. White / As energy efficient devices become more necessary, it is desired to increase the efficiency of air conditioning systems. Current systems use on/off control, where the unit primarily operates in the long lasting start up transients. A proposed solution is an air conditioning unit that runs continuously with active computer control implemented to maximize efficiency. The objective of this thesis is to develop a mathematical model for a specific air conditioning unit and to compare this model to measurements made on the specific unit. This model can then be used to develop a multi-input multi-output control law in the future. In this thesis, a linearized moving interface lumped parameter model is presented, and the derivation verified with great detail. The model predicts transient perturbations from a steady state operating point. The air conditioner tested in this work required several modifications including the addition of sensors and controllers. A description of the system is provided. Methods used to determine all of the parameters for the model are given with explanation. The model is simulated with computer software and compared with experimental data. Simulations predict the final value of superheat and pressures in the evaporator and condenser well for step changes in the compressor speed and expansion valve opening.

No description available.

Doctor of Philosophy / Department of Hospitality Management and Dietetics / Elizabeth B. Barrett / Rebecca A. Gould / Equipment to store foods at proper temperatures is critical to serving safe and nutritious meals in schools yet little is known about the amount or the adequacy of refrigerated storage in school nutrition programs. The purposes of this study were to identify the types and capacity of refrigeration equipment used in schools, determine the perceived adequacy of refrigerated storage capacity to meet new meal pattern requirements, and examine differences in adequacy and capacity. A modified Delphi technique, site observations, pilot study, and electronic survey were used for data collection. School nutrition directors in the USDA/FNS Southwest Region (N=2392) served as the population. Respondents provided an inventory of refrigeration equipment for one of the schools in their district and information about perceived adequacy of refrigerated storage, barriers to purchasing refrigeration equipment, resources used to develop specifications, and practices to compensate for inadequate refrigerated storage in their program. Data analysis included descriptive statistics, independent sample t-tests, regression, and ANOVA. Over a third of directors indicated that refrigerated equipment was inadequate to meet new meal pattern requirements. Directors with more experience rated adequacy higher than directors with less experience. Milk coolers (n=212, 88.3%) and walk-in freezers (n=180, 75.0%) were the types of refrigeration equipment found most often in schools. Walk-in freezers and refrigerators provided over 95% of refrigerated storage space. The mean average cubic feet of refrigerated storage per school was 1423±1152. School enrollment is a significant predictor of refrigerated storage capacity. Refrigerated storage is a concern for school nutrition directors who reported practices to compensate for inadequate storage including maintaining low inventory and decreasing the number of items purchased. School nutrition professionals may use the results of this study to implement practices to compensate for inadequate refrigerated storage. Results cannot be generalized due to the regional nature of the survey and low response rate and possible non-response bias.

Thesis (M.S.)--Ohio University, June, 2005. / Title from PDF t.p. Includes bibliographical references (p. 127-130)