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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Horizontal tube bundle falling film distiller for ammonia-water mixtures

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Author(s):
Zavaleta-Aguilar, E. W. [1, 2] ; Simoes-Moreira, J. R. [1, 2]
Total Authors: 2
Affiliation:
[1] Univ Sao Paulo, IEE, BR-05508900 Sao Paulo, SP - Brazil
[2] Univ Sao Paulo, Escola Politecn, SISEA Alternat Energy Syst Lab, BR-05508900 Sao Paulo, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID; v. 59, p. 304-316, NOV 2015.
Web of Science Citations: 10
Abstract

This work presents an experimental study of an important component of an ammonia-water absorption refrigeration cycle based on the falling film technology-the distiller, which is formed by two parts: the generator and the rectifier. It was carried out a parametrical study on the operation of the distiller by testing several parameters. The experimental results showed that the distilled ammonia vapor concentration always degraded as rectifier, generator, and concentrated solution temperatures increased and improved as concentrated solution mass flow rates and concentrated solution concentrations increased. The highest distilled ammonia vapor concentration obtained was of 0.9974. Photographic documentation of flow pattern over the generator tube bundle was also obtained resulting in both jet column and sheet patterns. Finally, a Nusselt number correlation for the ammonia-water falling film over the generator tube bundle was proposed based on the experimental results and compared with other authors' correlations. (C) 2015 Elsevier Ltd and International Institute of Refrigeration. All rights reserved. (AU)

FAPESP's process: 10/10858-4 - Experimental study of a falling film distilation column for ammonia-water mixtures
Grantee:José Roberto Simões Moreira
Support Opportunities: Regular Research Grants
FAPESP's process: 10/16304-0 - Experimental study of a falling film distillation column for an ammonia/water absorption refrigeration cycle
Grantee:Eli Wilfredo Zavaleta Aguilar
Support Opportunities: Scholarships in Brazil - Doctorate