Inaug.-diss.--Erlangen. / Lebenslauf.

Thesis (SC. D.)--University of Michigan, 1940. / Cover title. "By Edwin M. Baker ... and Utah Tsao." "Reprinted from Transactions of American institute of chemical engineers, vol. 36, no. 4, August 25, 1940." "Literature cited": p. 538-539.

Thesis (M.Phil.)--Hong Kong University of Science and Technology, 2005. / Includes bibliographical references (leaves 84-86). Also available in electronic version.

Thesis (M.S.)--Florida State University, 2006. / Advisors: Peter N. Kalu, Namas Chandra, Florida State University, College of Engineering, Dept. of Mechanical Engineering. Title and description from dissertation home page (viewed June 13, 2006). Document formatted into pages; contains ix, 60 pages. Includes bibliographical references.

Thesis (Ph. D.)--University of Chicago, 1912. / "Reprinted from the Physical review, vol. XXXIV, no. 4, April, 1912." Bibliography: p. 294-295. Also available on the Internet.

Thesis (Ph. D.)--West Virginia University, 2007. / Title from document title page. Document formatted into pages; contains xiii, 131 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 129-130).

M.Ing. / The objective of this study is to analytically evaluate the heat transfer and area requirements of a plate heat exchanger, in which the refrigerant exits the heat exchanger as a saturated vapour; a superheated vapour, under variable inlet conditions, through application of the experimental results obtained by Yan and Lin (1999) on the evaporation heat transfer and pressure drop of refrigerant R134a in a plate heat exchanger. Through the analytical evaluation it will firstly be shown that for the instance in which the refrigerant enters the heat exchanger at different inlet qualities and exits the heat exchanger as a saturated vapour that the amount of heat transferred and area requirement reduces as the inlet quality of the refrigerant increases. Secondly, when the refrigerant enters the heat exchanger as a saturated vapour and exits at different values of superheated vapour that the amount of heat transferred from the water to the refrigerant increases as the amount by which the refrigerant is superheated increases, combined with an increased area requirement in order to realise a certain amount of heat transfer. All evaluations are conducted at fixed mass flow rates. Through comparison of the two evaluations it will be shown that the area requirement in the superheated region is significantly larger than in the evaporation region of the heat exchanger whilst obtaining significantly less heat transfer.

M.Ing. / In this study the performance of a reversible ground-source heat pump, coupled to a municipal water reticulation system, is compared experimentally and with simulations with a conventional air-source heat pump for space cooling and heating. A typical municipal water reticulation system comprises hundreds of kilometres of pipes designed in loops that will ensure adequate circulation of the water. This results in a substantial heat exchanger with great potential. Indirect heat transfer occurs between the refrigerant and ground via the municipal water reticulation system that acts as the water-to-ground heat exchanger. The experimental and simulated comparisons of the ground-source system to the air-source system are conducted in both the cooling and heating cycles. Climatalogical statistics are used to calculate the capacities and coefficients of performance of the ground-source and air-source heat pumps. Results obtained from measurements and simulations indicate that the utilisation of municipal water reticulation systems as a heat source/sink is a viable method of optimising energy usage in the air-conditioning industry, especially when used in the heating mode.

Heat transfer coefficients were measured at the inner wall of smooth concentric and eccentric annuli. The annuli were formed by an outer plastic tube of 3 in. inside diameter and an inner core cylinder of 1 in outside diameter. Air at room temperature was allowed to flow through the annuli at a Reynolds number range from 15,000 to 65,000. The measurement of heat transfer coefficient was made by a transient heat transfer test technique. The method consisted in establishing an initial temperature gradient between the fluid and a solid body mounted on the core cylinder by heating, then observing and recording the temperature-time history of the body as it returned to equilibrium condition with the fluid stream. The heat transfer coefficient was calculated from this record. The final results were presented in graphical form showing variations of Nusselt number with Reynolds number. The results of the concentric annulus tests agreed favourably with those predicted by Wiegand (2) and Monrad and Pelton (3). The effect of eccentricity was to reduce the heat transfer coefficient although the general trend was identical to that in the concentric annulus case. It was observed that the decrease of heat transfer coefficient was not linearly related to the eccentricity of the core cylinder. The effect of eccentricity was more pronounced in the range 0 ≤ e ≤ 0.5 where the value of heat transfer coefficient decreased considerably. / Applied Science, Faculty of / Mechanical Engineering, Department of / Graduate

Results are reported of steady-state heat transfer studies on various beds of 0.7-inch diameter porous spheres packed in simple cubic configuration, in which the simultaneous transfer of mass and heat occurs between the surface of these spheres and an air stream. The thermal wall effect, which is caused by the participation of the packing container walls in the heat transfer process, was investigated for seven different beds of spheres. The serious effect associated with brass walls was rendered almost insignificant by the use of perspex packing containers. The thermal end effects associated with air flow through a two-layer perspex-walled assemblage were practically eliminated by the addition of three inert layers at the bed entrance and two at the exit. Part of the apparent reduction in the heat transfer factor with the addition of inert layers to the shallow bed was attributed to a decrease in driving force caused by the development of perfect void-cell mixing within the bed. The residual difference in jH between the unguarded and guarded forms of the shallow bed was attributed to a decrease in the coefficient of heat transfer brought about by the removal of the sudden contraction and expansion of the air from the active portion of the bed. / Applied Science, Faculty of / Chemical and Biological Engineering, Department of / Graduate