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The problem of heat conduction in a multi-layer, two-dimensional, orthotropic cylinder subject to asymmetric and periodic temperature distribution on the outer wall is solved analytically. Dimensional analysis of the problem shows that heat conduction through the cylinder is a function of the Biot number (Bi) and the following four non-dimensional parameters in each layer: frequency ratio (α ...
A theoretical and an experimental model are presented of the transient and steady-state performance of two types of solar stills. Both a conventional and an external condenser-type still were constructed. The two stills were tested under the same conditions. Comparisons were made of productivity and efficiency under different conditions. The still productivity and efficiency were considerably...
Knock is a major problem limiting the development of efficient and powerful engines in both design and operating stages. It is objectionable due to its damage on engine elements. Without knock, an engine can be designed to have a higher compression ratio, giving higher efficiency and power output. Since knock is a factor of concern, many researches have been done to eliminate and control knock....
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