Tham khảo tài liệu 'progress in biomass and bioenergy production part 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 19 Scale-Up of a Cold Flow Model of FICFB Biomass Gasification Process to an Industrial Pilot Plant - Example of Dynamic Similarity prove to be a successful construction for the reactor. With beds higher than 13 cm fluidized beds are in aggregative or bubbling fluidization states. In turn at bed heights over 30 cm even a slugging state is attained. The solution at this point is a conical bed design in accordance with Kaewklum and Kuprianov 2008. 8. Symbols Ap Cross-section of particle m2 At Tube cross-section m2 Bcyc Width of rectangular cyclone inlet dutch m Cx Drag coefficient D cyc Characteristic cyclone diameter m Dcomb Riser diameter mm Dgas 1 Diameter of reactor upper segment mm Dgas 2 Diameter of reactor lower segment mm Dp Diameter of particle pm Dp 50 Particle diameter at which 50 of particles are collected by cyclone pm Dtube Inside tube diameter mm F - Fg p Gravity of particle N g Gravity acceleration 9 81 m s2 gc Conversion factor 9 81gm m s2 wt Hcomb Riser height mm i Natural number j Natural number L Stationary bed height m Lmf Bed height at minimum fluidization condition m Lmff Bed height at minimum fully fluidized state m Ns Number of turns made by gas stream in a cyclone separator p Pressure Pa pB ar Pressure at arbitrary conditions Pa pi Relative pressure in point i Pa pi j Differential pressure between points i and j Pa pj Relative pressure in point j Pa pn Pressure at normal conditions Pa Rep Particle Reynolds number Tg ar Temperature at arbitrary conditions C Tn Temperature at normal conditions C vcomb Gas velocity in riser m s vg Gas velocity m s vg ref Gas velocity measured with pitot tube or orifice in tube before gas entering reactor m s vgas Gas velocity in gasification zone m s vmf Minimal fluidization velocity m s vmff Minimal velocity of full fluidization m s vt Terminal velocity m s Ap differential pressure Pa Apmf differential pressure at minimum fluidization Pa Apmff differential pressure at full fluidization Pa 20 Progress in .