eprintid: 5176
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/00/51/76
datestamp: 2023-11-09 16:16:54
lastmod: 2023-11-09 16:16:54
status_changed: 2023-11-09 16:00:49
type: article
metadata_visibility: show
creators_name: Rahamnian, N.
creators_name: Homayoonfard, M.
title: A comparison of co-current and counter-current modes of operation in urea prilling tower
ispublished: pub
keywords: Drop breakup; Metabolism; Process engineering, Co currents; Counter current; Heat and mass transfer; Heat transfer performance; Prilling; Process control strategies; Simultaneous solution; Spray cooling, Urea
note: cited By 2; Conference of International Conference on Process Engineering and Advanced Materials, ICPEAM 2012 ; Conference Date: 12 June 2012 Through 14 June 2012; Conference Code:106208
abstract: In this paper, a model for urea prilling tower with co-current flow of cooling air and urea prills (particles) is presented. The process is modelled by simultaneous solution of the differentialequations for hydrodynamics, heat and mass transfer between the air and prills. The process variables such as temperature, absolute and relative humidity of air along the height of the tower were obtained from this model. Temperature and moisture distribution of urea prills and their radial and vertical velocities were also calculated. The results of the present model were compared with the counter-current operation model available in the literature. The simulation results show that heat transfer performance for co-current operation is significantly less than that of the counter-current scenario. This is more pronounced for small prills, i.e. 1.0 mm than that of the large prills. The advantage of the model is that it can be used to investigate influence of operating parameters on efficiency of the co-current process. This also helps us to set the process control strategies for design and quality control purposes of the process. © (2014) Trans Tech Publications, Switzerland.
date: 2014
publisher: Trans Tech Publications Ltd
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904045165&doi=10.4028%2fwww.scientific.net%2fAMR.917.199&partnerID=40&md5=de66ae22438f99737a04e0cf6accbd83
id_number: 10.4028/www.scientific.net/AMR.917.199
full_text_status: none
publication: Advanced Materials Research
volume: 917
place_of_pub: Kuala Lumpur
pagerange: 199-208
refereed: TRUE
isbn: 9783038350521
issn: 10226680
citation:   Rahamnian, N. and Homayoonfard, M.  (2014) A comparison of co-current and counter-current modes of operation in urea prilling tower.  Advanced Materials Research, 917.  pp. 199-208.  ISSN 10226680