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Experimental study of a falling film distilation column for ammonia-water mixtures

Grant number: 10/10858-4
Support type:Regular Research Grants
Duration: March 01, 2011 - February 28, 2014
Field of knowledge:Engineering - Mechanical Engineering - Transport Phenomena
Principal Investigator:José Roberto Simões Moreira
Grantee:José Roberto Simões Moreira
Home Institution: Escola Politécnica (EP). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Assoc. researchers:Gherhardt Ribatski ; Marcelo da Silva Rocha ; Marcia Barbosa Henriques Mantelli

Abstract

This project aims at an experimental study of the phenomenon of distillation of a solution of ammonia / water in order to produce ammonia vapor of high purity, with an index greater than 99.9%, ideal for use in absorption refrigeration cycles ammonia / water. The main interest focuses on the use of film technology descendants with the use of microchannels for heating the solution and release of ammonia vapor.For this, we intend to build an experimental circuit properly instrumented to obtain relevant parameters of the process of simultaneous transfer of heat mass that will occur. This circuit is provided with additional components such as evaporator, condenser, expansion valve, pump solution, among others, in order to obtain an operating cycle, but at laboratory scale and control in order to obtain the controlling parameters of performance and functioning, such as mixture flow, temperature, concentration and operating temperatures. Finally, this project is relevant within the context of rational use of energy, particularly the development will contribute to cycles of heat absorption of ammonia / water for use in cogeneration systems or even trigeneration. There is to inform you that the only manufacturer of such equipment employs an old technology based column with plates, which justifies the use of new technologies such as film descendants. (AU)

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
NARVAEZ-ROMO, BEETHOVEN; SIMOES-MOREIRA, JOSE R. Falling Liquid Film Evaporation in Subcooled and Saturated Water Over Horizontal Heated Tubes. HEAT TRANSFER ENGINEERING, v. 38, n. 3, SI, p. 361-376, 2017. Web of Science Citations: 2.
ZAVALETA-AGUILAR, E. W.; SIMOES-MOREIRA, J. R. Horizontal tube bundle falling film distiller for ammonia-water mixtures. INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, v. 59, p. 304-316, NOV 2015. Web of Science Citations: 10.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.