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[en] In this paper, the economics analysis of water production by using different solid desiccant materials and composite materials through Scheffler reflector is presented. The experiments for water production have been performed at National Institute of Technology, Kurukshetra, Haryana, India [29°58′ (latitude) North and 76°53′ (longitude) East]. The various factors have been carried out to calculate the annual cost/liter in Indian currency. Total six cases are studied, and for each case, uniform procedure is adopted. The silica gel gives the best economical annual cost/liter compared to molecular sieve and activated alumina in case of solid desiccant, and for composite material, it is CaCl2/River Sand compared to LiCl/River Sand and LiBr/River sand.
[en] In the present paper, the evolutionary behavior of weak shock waves propagating in an unsteady one-dimensional flow in non-ideal radiating gas under the effect of transverse magnetic field is examined. For the effect of thermal radiation, the radiative transfer equations are approximated under the optically thin limit. It is observed that a linear solution in the characteristic plane may exhibit a non-linear behavior in the physical plane. The transport equation governing the evolution of weak shock waves is obtained which introduces the conditions for shock formation. The time for the first breaking of the wave is determined. Also, the effect of radiative heat transfer on the growth of compressive waves and decay of expansive waves in ideal and non-ideal magnetogasdynamics regime is discussed.