Numerical Investigation of New Cooling Method for Clinker Flow in Opposite Direction with Airflow at Different Height Ratios

Several parameters affect the properties of Portland cement and one of these parameters is the cooling rate of the clinker. If the effectiveness of the cooling method of the clinker increases, a good enhancement in the properties of Portland cement will be found. Depending on the new cooling method suggestion by Nasr et. al. [20], the counter pattern of air clinker flow was studied using (FLUENT 6.3.26). The dimensions of the cooling room in grate cooler, the constant mass flow rate of both clinker and air, different height ratios, and different clinker porosity were considered in this numerical work. The results show that the heat transfers in the first half of the cooling room (0 < X < 0.9 m) is larger than that in the second half (0.9 < X < 1.8 m), and this leads to an increase in the temperature of outlet air so can benefits from it in the heating of furnace. When the clinker and air are flowing in the counter direction, the cooling method is more beneficial when compared with that of parallel flow because the exiting clinker has a great rate of cooler and the air exits from the grate cooler is loaded with large thermal energy. Finally, it can design the best length of gate according to the required clinker temperature at the outlet side, and this results to reduce the cost of the cooling process according to the temperature distribution results at (0 < X > 1.8m) for different porosity and H.R values.

Introduction

In 2013, the American Psychiatric Association determined that hoarding disorder (HD) is a diagnosable mental health condition. This disorder has been studied only in the past three decades, although information about this surprisingly common problem has been accumulating at a great rate in recent years....

Towards an efficient anode material for Li-ion batteries: understanding the conversion mechanism of nickel hydroxy chloride with Li- ions

Nickel hydroxy chloride was studied as an efficient material for lithium ion batteries. Ni(OH)Cl showed high capacity, good cycle stability, and great rate capability through the formation of Ni(OH)2/NiCl2 nanocomposite heterointerfaces.

‘Céphalologie’: A Recurring Theme in Classical and Mediaeval Lore

In the whole field of mediaeval hagiography, one of our most urgent needs is the establishment of trustworthy critical texts of James of Voragine's Legenda aurea, and of the Latin's various vernacular translations. Very soon after its first publication, the Legenda began to be copied throughout Western Christendom at a great rate, very often by professional scribes working for stationers who would expect them to write at speed while reproducing this encyclopaedia of the saints' deeds and marvels. Thus, from the beginnings of its manuscript tradition, corruptions and errors were introduced; and we still lack the means to correct them. For want of anything better, scholars must still refer to the edition of the Latin by Johann G. T. Graesse; but this cannot be used with any confidence. As Jacobus J. A. Zuidweg has observed in a summary of his findings, ‘Force nous était donc de nous servir de l’édition … quelque défectueuse qu'elle fût. Le texte de cette édition, qui fourmille de fautes se rapportant tant au texte même qu'à la ponctuation, est basé sur un exemplaire imprimé, datant du 15e siècle.’ Elsewhere, Zuidweg points out that Graesse's edition is incomplete, without, for example, James's chapter 73, dealing with Bede. The preparation and presentation of such critical texts would be a vast undertaking, more, probably, than could be achieved by any one person. Several gifted and zealous scholars have announced preliminary studies towards it, but have in the end found themselves defeated by the scope of the task and by its complexities. Not long ago, Konrad Kunze announced the inauguration of a card-index catalogue at Freiburg, which is to comprise all the Latin and vernacular manuscripts and printed texts of the Legenda aurea. This would now be indispensable for any proposed critical editions; but it does not seem that such editorial work is intended (Analecta Bollandiana 95 [1977] 168).

Extract of letter of Mr. Haethcott to Mr. Flamfteed from Cabo Cors Castle on the Coast of Guiney the 14th of December 1683. Concerning the Tide on the coast variation of the needle &c

The sea runs here along the shore continually to the Eastward, at the very great Rate, except at full and change, for the it runs to Westward or the least makes agreat Abate November 24th.