Resonance degenerate plane lattice of magnetodielectric spheres with a hole
The solution of the problem on electromagnetic waves scattering by a plane lattice of magnetodielectric spheres, in which the lattice degenerate resonance is excited, is considered.
Structural Function Development for Electromagnetic Interactions in the System of Multiple Resonant Magnetodielectric Spheres
An approach to derive structure functions of electromagnetic interactions in the system of multiple resonant magnetodielectric spheres is considered. Expressions for magnticand electrical-type tensor functions of electromagnetic interactions in the system of spheres are obtained, the expressions for structure functions of magnetic and electric type are analyzed. The investigations of resonance properties of electromagnetic interactions in many-body systems attract considerable attention. In the present paper, the analysis of electromagnetic interactions in many-body systems is restricted to the case of spatial systems of the small uniform resonant magnetodielectric spheres [1]. In such spatial structures, the electromagnetic interactions between spheres and the spheres themselves have resonance properties. Structural resonances of electromagnetic interactions between the spheres can influence the internal resonances of the spheres and their fine structure, which allows a theoretical and experimental approach to be developed for examination of electromagnetic interactions in multiple-sphere systems. It is convenient to describe the features of electromagnetic interactions in sphere systems by introducing the notion of structure functions of electromagnetic interactions. In the case of crystal lattices these functions are related to the so-called Ewald lattice sums, playing an important role in the dynamic theory of crystal lattices [2]. Structure functions may be useful in theoretical and experimental studies of resonance electromagnetic interactions in multiple-sphere systems, in studying physical influence of the lattice structural resonances on the internal resonances of spheres in the lattice and their fine structure [3], and in the experimental estimation of the Ewald sums. The aim of the present study is to develop a new approach to derivation of structure functions of electromagnetic interactions in the system of small uniform ISSN 0040-2508 * Originally published in Radiophysics and Electronics, Vol. 9, No 1, 2004, pp. 200–210. © 2004 Begell House, Inc. 1
Experimental Study for a Double-Glazed Forced-Flow Solar Collector/Regenerator
Experimental study of a double-glazed forced-convection solar collector/regenerator for absorption solar cooling is presented. The south facing experimental solar collector/regenerator with 10 deg slope is located at Kaohsiung, Taiwan at 120{degree}19minutesE longitude and 22{degree}34minutesN latitude. The size of the collector is 1 m wide and 7 m long with an effective regeneration area of 0.9 m by 6 m. Previous study for single-glazed forced-convection solar collector/regenerator operated at the same location has shown to have a best day-average efficiency of 17%. In order to raise the system performance, a double-glazed collector/regenerator is constructed such that air can be preheated in the upper channel flow. The preheated air is then conducted into the lower channel where it contacts with the film flow of solar heated lithium-chloride solution and regenerates the solution by carrying out the evaporated water vapor. The preheated air has lower relative humidity but the same humidity ratio since it is sensibly heated. Therefore, the regeneration driving potential is increased. The present study shows that the best day-average efficiency can reach 20% which increases the feasibility of the open-cycle absorption solar cooling system. Effects of controlling parameters on the collector/regenerator performance are studied, and heat and mass transfer correlationsmore » are also presented for design purposes.« less