Relevant bibliographies by topics / Roberto Calandra

Academic literature on the topic 'Roberto Calandra'

Author: Grafiati
Published: 14 March 2023

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Journal articles on the topic "Roberto Calandra"

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Villarreal Albitres, William, and Obidio Rubio Mercedes. "Simulación computacional de flujo de dos-fases de un evaporador Roberts." REVISTA TECNOLOGÍA & DESARROLLO 11, no. 1 (March 7, 2015): 7–14. http://dx.doi.org/10.18050/td.v11i1.81.

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El presente trabajo de investigación fue llevada a cabo con el objetivo de determinar el comportamiento de los campos de velocidades, temperaturas y presiones del jugo de caña, como fluido de estudio, de un sistema de dos-fase de un evaporador Roberts. Para simular computacionalmente el movimiento de la partícula del fluido en un medio ambiente de dos-fases se usó el código CFX-ANSYS, el cual calcula el campo del flujo por el Método del Volumen Finito. Asimismo, se registraron las condiciones del flujo tanto de jugo como de vapor a la entrada y salida de un evaporador Roberts de 785 m2  de Industrial Pucalá en Chiclayo. Para validar el perfil del campo de temperatura simulados computacionalmente se tomaron datos experimentales del jugo hirviendo, colocando bulbos de temperatura sobre la calandria del evaporador. Resultados obtenidos de la simulación computacional de los campos de velocidad, temperatura y presión del jugo de caña de un evaporador Roberts mostraron que la velocidad del jugo cae dramáticamente en el fondo y calandria del evaporador. Recirculación de jugo abundante ocurre entre la línea de salida de jugo evaporado y el tubo central de recirculado. Así mismo, las temperaturas del fluido que hierve son más altas en la parte media de la altura de la calandria, y su presión decrece uniformemente desde el fondo al cuerpo del evaporador. Los valores de la temperatura del jugo simulados computacionalmente y medidos experimentalmente mostraron estar en buena concordancia, validando al modelo desarrollado.
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Staudt, Sheila Katiane. "ESCRITA COMO REEXISTÊNCIA: RESGATES MEMORIALÍSTICOS EM SILÊNCIO NA CIDADE, DE ROBERTO SEABRA." EntreLetras 12, no. 2 (November 23, 2021): 178–96. http://dx.doi.org/10.20873/uft2179-3948.2021v12n2p178-196.

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O romance Silêncio na cidade, de Roberto Seabra, publicado em 2017, retrata um crime bárbaro ocorrido na capital federal nos anos 1970. A certeza da impunidade – tema marcante na narrativa – move os donos do poder, calando indistintamente Justiça, imprensa e polícia – instrumentos de serviço e/ou proteção coletivos que, submissos ou subjugados, não têm outra saída senão sucumbir aos desejos torpes de uma elite legatária da barbárie e do caos. Entender como a memória auxilia na reexistência da personagem-protagonista é o que intentamos nesse ensaio, além de validar o manuscrito literário como signo que resiste às agruras de tempos obscuros.
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FERREIRA, J., B. L. NOGUEIRA, and A. R. SECCHI. "DYNAMIC SIMULATION OF EVAPORATOR IN ETHANOL BIOREFINERY." Latin American Applied Research - An international journal 49, no. 1 (January 31, 2019): 65–70. http://dx.doi.org/10.52292/j.laar.2019.287.

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Biorefineries producing ethanol from sugarcane are, mostly, plants that obtain ethanol from first-generation process. Second-generation ethanol is currently being studied and evaluated technologically and economically. One of the stages of large energy consumption, common to 1st and 2nd generation processes, is the concentration step by evaporator systems. In the present work a phenomenological transient model of Robert type evaporator is implemented using EMSO simulator. The physicochemical properties were calculated by the thermodynamic package VRTherm. The calandria section of the evaporator was modeled as a shell-and-tube heat exchanger, followed by a flash vessel for phase separation using level and pressure controllers. The finitedifferences method was used to discretize the spatial variable in the obtained partial differential equations, and the numerical integrator DASSLC was the code used to solve the resulting system of differential-algebraic equations. The obtained compositions of the liquid and vapor phases and temperatures are in agreement with data obtained from literature. In order to compare the results between a simpler and a more detailed models, flash and Robert type evaporator models were evaluated.
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Cobo, D. F., J. G. Rodriguez, A. F. Ospina, A. L. Gomez, and N. J. Gil. "Evaporation performance: present and future in Colombian cane sugar factories." Sugar Industry, May 2017, 264–69. http://dx.doi.org/10.36961/si18329.

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Evaporation performance is usually affected by internal and external factors such as sugarcane quality, juice conditioning, exhaust steam availability, juice flow variation, heat transfer area available, type of evaporator, and geometric relationships. These factors influence the evaporation rate and cleaning frequency. An integral strategy to improve performance was proposed, including technological changes (falling-film evaporators) evaluated by simulation, on-line performance index (evaporation performance index, EPI), and new guidelines for the evaporation station configuration. EPI, proposed by Cenicaña (Colombia), is defined as the product of RDS (refractometric dry substance content) difference and juice flow divided by the product of heating steam pressure and heat transfer area. The results show that it is possible to improve performance of the third effects by extending the calandria tubes in Robert-type evaporators; this improves the heat transfer coefficient by 15–30%. In most cases, increasing juice flow velocity in evaporator tubes will increase the overall heat transfer coefficient. The use of longer tubes should be considered when modifications in evaporation stations are required. In addition, the application of EPI as a tool to assess the performance in the evaporation train and make decisions regarding the cleaning schedule was validated.
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Dissertations / Theses on the topic "Roberto Calandra"

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Calandra, Roberto [Verfasser], Jan [Akademischer Betreuer] Peters, and Michael A. [Akademischer Betreuer] Osborne. "Bayesian Modeling for Optimization and Control in Robotics / Roberto Calandra ; Jan Peters, Michael A. Osborne." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2017. http://d-nb.info/1128309955/34.

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MARINO, FABIO. "ROMA-NEW YORK andata e ritorno. Il programma di scambio fra la Facoltà di Architettura dell'Università di Roma La Sapienza e la School of Architecture della Columbia University di New York negli anni trenta." Doctoral thesis, Politecnico di Torino, 2019. http://hdl.handle.net/11583/2731326.

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Books on the topic "Roberto Calandra"

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Vicari, Nino. Lo Steri di Palermo sede del rettorato universitario: Guida al restauro di Roberto Calandra e Carlo Scarpa negli anni Settanta del Novecento. Palermo: Edizioni Caracol, 2019.

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