Documents disponibles écrits par cet auteur

Experimental simulation of solar flash desalination / Mohammad Abutayeh in Transactions of the ASME. Journal of solar energy engineering, Vol. 132 N° 4 (Novembre 2010) 

Public ISBD [article]  in Transactions of the ASME. Journal of solar energy engineering > Vol. 132 N° 4 (Novembre 2010) . - pp. [041015/1-7] Titre : Experimental simulation of solar flash desalination Type de document : texte imprimé Auteurs : Mohammad Abutayeh, Auteur ; D. Yogi Goswami, Auteur Année de publication : 2011 Article en page(s) : pp. [041015/1-7] Note générale : Energie Solaire Langues : Anglais (eng) Mots-clés : Solar  flash  desalination  Condensation  solar  heating  sustainable  development  two-phase  flow  vaporisation Index. décimale : 621.47 Résumé : Experimental simulations of a sustainable desalination process have been carried out using a pilot unit. Experiments were conducted at analogous conditions to simplify design evaluation but with different values of the controlling variables to enhance analysis and modeling. The proposed desalination process, which employs solar heating and passive vacuum generation, has been theoretically simulated in earlier work. It entails flowing seawater through a condenser to preheat it and then through a heater before flashing it in a vacuumed evaporator connected to the condenser where the flashed hot vapor is condensed by the incoming cold seawater forming fresh water. All experiments were run for the same period of time starting at the same initial vacuum. Experiments were carried out at different seawater flow rates and different flash temperatures. In addition, each experiment was duplicated three times to validate its outcome. Flashing seawater at higher temperatures increases vaporization and fresh water production rate. In addition, the accumulating noncondensable gases that are slowly eroding the vacuum will decrease the overall vaporization with time, which reduces the production rate of fresh water. DEWEY : 621.47 ISSN : 0199-6231 En ligne : http://asmedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JSEEDO00013200 [...] [article] Experimental simulation of solar flash desalination [texte imprimé] / Mohammad Abutayeh, Auteur ; D. Yogi Goswami, Auteur . - 2011 . - pp. [041015/1-7]. Energie Solaire Langues : Anglais (eng) in Transactions of the ASME. Journal of solar energy engineering > Vol. 132 N° 4 (Novembre 2010) . - pp. [041015/1-7] Mots-clés : Solar  flash  desalination  Condensation  solar  heating  sustainable  development  two-phase  flow  vaporisation Index. décimale : 621.47 Résumé : Experimental simulations of a sustainable desalination process have been carried out using a pilot unit. Experiments were conducted at analogous conditions to simplify design evaluation but with different values of the controlling variables to enhance analysis and modeling. The proposed desalination process, which employs solar heating and passive vacuum generation, has been theoretically simulated in earlier work. It entails flowing seawater through a condenser to preheat it and then through a heater before flashing it in a vacuumed evaporator connected to the condenser where the flashed hot vapor is condensed by the incoming cold seawater forming fresh water. All experiments were run for the same period of time starting at the same initial vacuum. Experiments were carried out at different seawater flow rates and different flash temperatures. In addition, each experiment was duplicated three times to validate its outcome. Flashing seawater at higher temperatures increases vaporization and fresh water production rate. In addition, the accumulating noncondensable gases that are slowly eroding the vacuum will decrease the overall vaporization with time, which reduces the production rate of fresh water. DEWEY : 621.47 ISSN : 0199-6231 En ligne : http://asmedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JSEEDO00013200 [...]

Predicting the citrate soluble loss of the dihydrate process / Mohammad Abutayeh in Industrial & engineering chemistry research, Vol. 48 N° 18 (Septembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 18 (Septembre 2009) . - pp. 8670–8677 Titre : Predicting the citrate soluble loss of the dihydrate process Type de document : texte imprimé Auteurs : Mohammad Abutayeh, Auteur ; Scott W. Campbell, Auteur Année de publication : 2010 Article en page(s) : pp. 8670–8677 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Phosphate  rock  Phosphoric  acid  Dihydrate  process Résumé : A thermodynamic model was developed to predict the distribution of phosphates between the liquid and the solid phases in a reactor used for extracting phosphoric acid from phosphate rock by the dihydrate process. Experimental data found in the literature for equilibrium constants were regressed and included in the model to obtain a more accurate representation of the thermodynamic equilibrium. In addition, the Edwards−Maurer−Newman−Prausnitz Pitzer-based model was used to represent the activity coefficients of all species, while published lime solubility data were used to find an expression for the self-interaction parameter of phosphoric acid. The model was validated by comparing its predictions to experimental citrate soluble loss data taken from earlier work and yielded very good results. Simulation results for ionic strength, solution acidity, lime solubility, and citrate soluble loss were used to analyze the effects of temperature and solution sulfate and phosphate content on the dihydrate process. Decreasing temperature and increasing sulfate levels were found to raise the acidity and the ionic strength of the solution as well as minimize the citrate soluble loss. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900183m [article] Predicting the citrate soluble loss of the dihydrate process [texte imprimé] / Mohammad Abutayeh, Auteur ; Scott W. Campbell, Auteur . - 2010 . - pp. 8670–8677. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 18 (Septembre 2009) . - pp. 8670–8677 Mots-clés : Phosphate  rock  Phosphoric  acid  Dihydrate  process Résumé : A thermodynamic model was developed to predict the distribution of phosphates between the liquid and the solid phases in a reactor used for extracting phosphoric acid from phosphate rock by the dihydrate process. Experimental data found in the literature for equilibrium constants were regressed and included in the model to obtain a more accurate representation of the thermodynamic equilibrium. In addition, the Edwards−Maurer−Newman−Prausnitz Pitzer-based model was used to represent the activity coefficients of all species, while published lime solubility data were used to find an expression for the self-interaction parameter of phosphoric acid. The model was validated by comparing its predictions to experimental citrate soluble loss data taken from earlier work and yielded very good results. Simulation results for ionic strength, solution acidity, lime solubility, and citrate soluble loss were used to analyze the effects of temperature and solution sulfate and phosphate content on the dihydrate process. Decreasing temperature and increasing sulfate levels were found to raise the acidity and the ionic strength of the solution as well as minimize the citrate soluble loss. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900183m