The present work aims at investigating opportunities for energy conservation in Western Desert Gas Complex (WDGC) through modification of the heat exchanger train. Process simulation of the plant was performed using HYSYS steadystate simulation program. This step was necessary to furnish stream property data requested for heat analysis as well as condenser and reboiler duties. Adopting the pinch design technology, minimum heating and cooling energy requirements were calculated for different values of minimum approach temperature (T min ). Two methods were used, the problem table algorithm of the pinch method and the linear programming method. Then designing the heat exchanger network (HEN) took place according to the pinch design method to achieve target utilities for each T min . The optimum HEN is that which achieves considerable heat recovery with least annualized total cost. The optimum HEN design was found to correspond to T min of 10 ı C and achieved saving of hot and cold utilities as 42 and 21%, respectively, compared to the actual utilities consumption of the existing plant. These savings can be realized by adding only two heat exchangers to the existing network with a payback period of 1 year.
The present study focuses on utilizing polystyrene emulsion treated newsprint microcrystalline fibers (NPMCF). These treated fibers were then added to styrene‐butadiene rubber (SBR) at different concentrations, namely, 3, 6, 9, and 12 phr (part per hundred part of rubber). Mixing of ingredients was carried out on a rubber roll mill and afterward molded as a thin film on a hot press, then, exposed to electron beam irradiation doses up to 200 kGy so as to enhance the treatment of the composites. Mechanical properties of the composites, such as tensile strength, elongation at break, tensile modulus, and cross‐link density were enhanced by adding the treated fiber to SBR and by irradiation, and this enhancement was obtained at 6 phr fiber at 100 kGy. Measurements of scanning electron microscopy (SEM) proved the adhesion of the treated fibers to SBR. The thermal conductivity was measured for the prepared composites as a function of electron beam irradiation and fiber content. It was found that the thermal conductivity decreases according to fiber loading (up to 6 phr fiber) and irradiation dose.
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