Pressure drop in a packed bed with sintered ore particles as applied to sinter coolers with a novel vertically arranged design for waste heat recovery

Abstract

The pressure drop over a packed bed with sintered ore particles was studied experimentally. The sintered ore particles were characterized to determine their equivalent particle diameter, bed voidage, and sphericity. The pressure drop experiments were performed on unsorted and sieved particles with various size distributions for a superficial velocity up to 2.4 m/s, covering flow regimes from laminar to turbulent. It was shown that the Ergun equation underestimates the pressure drop for such highly irregular-shaped particles by about 40%. The measured modified friction factor was well correlated to a scaled Ergun equation, which was verified to be valid for the modified particle Reynolds number up to 12 000 toward design and optimization of vertically arranged sinter coolers for waste heat recovery.

Parametric Study on the Flow Profiles of Vertical Sinter Cooling Bed Using the DEM and Taguchi Method for Waste Heat Recovery

“…During the cooling process, a large amount of sensible heat is produced, which is expected to be recovered to reduce energy consumption and mitigate the environmental impact. During the past decade, a considerable number of research papers have been developed in the field of VSCB, mainly focusing on thermodynamics parameters, such as the solid and gas inlet temperature, solid and gas inlet mass flow rate, aspect ratio of VSCB [1][2][3], and gas pressure loss [4][5][6]. Moreover, optimization studies have examined the coefficient of heat transfer [7,8] and exergy transfer [9,10].…”

Hydraulic Sheet Resistance In Paper­-Based Porous Media

“…where ⍴ bulk is bulk density, ⍴ a is apparent density, V part is particle volume and S part is particle surface area [20]. From this we can define a modified Reynolds number as,…”

“…where ⍴ and μ are the fluid density and dynamic viscosity, respectively [20]. The modified Reynolds number is used to capture particle irregularity and voidage which…”

“…For these studies, turbulent transition is determined by inertial contribution to pressure drop by a factor X , as shown in (47). However, an observation for beds of particlebased porous media is that irregularity in particle shape as measured by its sphericity seems to be the largest contributor to how readily porous media flow may transition to the turbulent regime [20]. also suggest nonlinear behavior is caused only by the presence of inertial forces.…”

“…Research investigating water shows that beyond the Forchheimer regime a sudden decrease in hydrostatic pressure is observed. Researchers attribute this sudden pressure drop to a flow transition to the turbulent regime [21] [55].Interestingly, research involving gas does not show this sharp pressure drop effect but rather an increase in the rate of change of the pressure gradient for an incremental increase of flow rate[20] [56]…”