Artigo_TCC
URI permanente para esta coleçãohttps://ri.ifam.edu.br/handle/4321/726
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Item Energy and exergy analysis of a adsorption chiller(2019-10-20) Soares, José Josimar; Gomes, Joseh Emmanuel de Sousa; Gurgel, José Maurício Alves de Matos; Melo, Francisco José AraújoThis paper shows the energy and exergy analysis of a two-bed adsorption chiller. The system was developed at LES/CEAR/UFPB, and constitutes of two adsorption reactors, a condenser and an evaporator, which function independently. Cycle times and secondary flow switching control scheduling is performed using a LabVIEW® interface that allows automatically secondary flow control through the cycle management system (SGC). The experimental tests were performed with the silica gel / water adsorptive pair. The specific cooling capacity (SCP) and coefficient of performance (COP) of the two-reactor chiller were 81.4 W kg-1 and 0.52 respectively, with an exergetic efficiency of 8.2% for the best working conditions, represented by the triplet 72/30/15 ℃ and a cycle time of 35 min. The results reached the levels of recent publications of literature describing models with the same characteristics. The maximum temperature required for the operation of this system is compatible with the use of low-temperature industrial thermal waste and flat type solar collectors, which may allow its production on a commercial scale.Item Fibras de poli (caprolactona) obtidas por eletrofiação contendo ácido gálico(2019-10-27) Pessoa, Tainah Vasconcelos; Segundo, João de Deus P. de M.; Moraes, Maria Oneide S. de; Brito, Walter R.; Almeida, Rosemeire S.; D'Ávila, Marcos A.; Silva, Rudyere N.Poly (ε-caprolactone) (PCL) is a polymer of the class of aliphatic polyesters very important for medical application. Gallic acid (GA) is found in many types of plants. This substance is a natural polyphenol, and its derivatives are compounds of great interest in the pharmaceutical industry. The applications of PCL fibers obtained by electrospinning have been frequently reported in the literature. In the present work, PCL membranes incorporated with GA were produced. The membranes received morphological characterization by scanning electron microscopy (SEM). Statistical study of the measurements of the fiber diameters that were obtained manually in the ImageJ image analyzer software (free version). The influence of GA concentrations (0.4, 0.7, 1, 5 and 10% wt) on the final characteristics of the fibers produced was evaluated. For AG concentrations of 0.4; 0.7; 1 and 5 wt% it was possible to produce PCL / AG membranes. It was not possible to produce membranes with a concentration of 10wt% due to AG precipitation in the PCL solution. The concentration of 0.4 wt% and 0.7 wt% GA is most suitable for incorporation of the drug into PCL fibers. PCL with AG membranes successfully developed are promising for medical application.