Thesis (M.S.)--University of Michigan, 1975.

No description available.

No description available.

Thesis (M.S.)--University of Michigan, 1978.

Call number: LD2668 .T4 1932 C55

No description available.

Thesis (Ph. D.)--University of Iowa, 1929. / Vita.

Thesis (Ph.D.)--Mechanical Engineering, Georgia Institute of Technology, 2008. / Committee Co-Chair: Preet M. Singh; Committee Co-Chair: Richard W. Neu; Committee Member: Hamid Garmestani; Committee Member: Timothy Patterson; Committee Member: W. Steven Johnson.

Owing to the continued increase in kilowatt capacity of new power stations being built today, proper sizing and selection of mechanical equipment has a vital effect on dollar savings, both for operation and maintenance costs as well as the initial cost of unit installation. In today's steam-electric plants, the power consumption of the motor-driven boiler feed pumps has been rising along with the increase of operating pressures and capacities. Power savings thus becomes a more significant factor than ever in selection of boiler feed pumping arrangement. Therefore, use of a more economical and justifiable boiler feed pumping arrangement with constant speed drive or variable speed drive through hydraulic couplings would vastly improve power plant economy and operation. This study compares the costs and operating characteristics of two constant-speed boiler feed pumps operating in parallel, against those of one constant-speed pump operating in parallel with one variable speed pump which is driven through hydraulic coupling (all pumps are of half-size capacity, motor-driven). This cost comparison shows that the former pumping arrangement is more economical than the latter at the unit base load. / Master of Science

Failure of carbon steel boiler tubes from waterside has been reported in the utility boilers and industrial boilers for a long time. In industrial boilers, most waterside tube cracks are found near heavy attachment welds on the outer surface and are typically blunt, with multiple bulbous features indicating a discontinuous growth. These types of tube failures are typically referred to as stress assisted corrosion (SAC). For recovery boilers in the pulp and paper industry, these failures are particularly important as any water leak inside the furnace can potentially lead to smelt-water explosion. Previous research shows that metal properties, environmental variables, and stress conditions are the major factors influencing SAC crack initiation and propagation in carbon steel boiler tubes. A significant volume of work has also been published to show that the use of carbon steel in high temperature water applications strongly depends upon the formation and stability of a protective magnetite oxide film on the waterside of boiler tubes. This present study is aimed at evaluating above stated variables individually and interactively to identify SAC crack initiation and crack propagation behavior in carbon steel boiler tubes. Other goal of this research is to understand the mechanism of bulbous SAC crack formation under industrial boiler operating conditions, thus to figure out a practical way to predict and prevent SAC type failures in the industrial boilers.