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Full-Text Articles in Engineering
Use Of Thermal Storage For Load Management In A Solar-Augmented Heat Pump System, James Thomas Schmitz
Use Of Thermal Storage For Load Management In A Solar-Augmented Heat Pump System, James Thomas Schmitz
Mechanical Engineering ETDs
Electric utilities are today faced with the dilemma of satisfying increasing demands for electrical energy while their ability to build new power plants is being severely curtailed primarily due to environmental concerns. By redistributing the power demand of individual customers (and thus the utility) with respect to time, greater overall electricity consumption can be met without increasing the generating capacity of the utility. This redistribution can be accomplished using thermal energy storage at the customer’s location. For heating and cooling of buildings, thermal storage, combined with off-peak period operation of the mechanical system's major electricity consuming equipment, can lower peak …
The Compatibility Of Mild Carbon Steel And Water In A Heat Pipe Application, David D. Kenney
The Compatibility Of Mild Carbon Steel And Water In A Heat Pipe Application, David D. Kenney
Mechanical Engineering ETDs
The phenomena that govern the performance and affect the lifetime of heat pipes are reviewed. The phenomena include the corrosion of metals by aqueous solutions, the diffusion of gases through metals, and the effects of hydrogen on metals. Heat pipes of 1015 C.D. carbon steel were fabricated and operated with a control group of 304 stainless steel heat pipes over the temperature range from 140° to 300° C. Results indicate that carbon steel/water heat pipes perform as well or better than 304 stainless steel/water heat pipes over the temperature range covered in this test.
Lee's Moment Method Applied To Binary Flow In Jet And Channel Devices Used For The Aerodynamic Separation Of Uranium Isotopes, Edward Eugene Holcomb
Lee's Moment Method Applied To Binary Flow In Jet And Channel Devices Used For The Aerodynamic Separation Of Uranium Isotopes, Edward Eugene Holcomb
Mechanical Engineering ETDs
Lees' moment method is applied to the problem of compressible, binary flow of uranium hexafluoride gas through a parallel plate channel. The time-dependent numerical problem is solved to yield the steady state solution. The results obtained are preliminary to the solution of the flow field for the curved nozzle and colliding jet devices used in the aerodynamic separation of uranium isotopes. Lees' concept of two-sidedness of the distribution function doubles the number of variables required to describe the system, and the resulting set of moment equations is not easily solved. The assumptions of isothermal, hydrodynamically fully developed flow are made …
A Survey Of Structural Identification Techniques, Doris Evelyn Miller
A Survey Of Structural Identification Techniques, Doris Evelyn Miller
Mechanical Engineering ETDs
This work is a collection and survey of system identification methods in the open literature. The motivation for the work was to find suitable methods of system identification for use in structural diagnosis. Methods surveyed include those which identify the system in terms of modal parameters, and those which identify the system either nonparametrically or in terms of arbitrary parameters. Both deterministic and stochastic methods are reviewed. Particular emphasis is placed on determining damping coefficients, and on a formulation known as modal synthesis. It is concluded that stochastic methods are better suited to the problem of structural diagnosis, and that …