Process Analysis and Simulations

All simulations and process analyses that appear in the next chapters were performed using the engineering design method described in Section 7.5.1 for flow and Section 7.7.5.1 for thermal effects. Since solving the full 3-D equation set in Section 

1 is difficult and time consuming, the generalized Newtonian method with the correction factor described in Section 7.5.3 can be used here for flow. In this chapter and later chapters, the simulated sections of the process are shown using solid lines while the estimated sections are shown with dotted lines. The 3-D simulation method was previously proven to predict accurately the simulation of pressures and temperatures for extruders of different diameters, screw designs, and resin types. 

A 40 mm diameter laboratory extrusion line was used to make demonstration parts using a specialty PE resin. The desire was to build a larger line with considerably higher extrusion rates. The shear viscosity of the resin is shown in Fig. 9.1. For the temperature range of the process, the heat capacity and thermal conduc- 

The baseline process was simulated using the data in Table 9.1 to determine the pressure and temperature at the entry to the metering section. After several iterations, the pressure and temperature were determined to be 22 MPa and 190 °C, respectively. The simulated axial pressure and temperature are shown in Fig. 9.2. 

For the baseline process, the experimental data and the numerical simulations fit quite well. The entry pressure and temperature to the metering section of 22 MPa and 190 °C are very reasonable for this resin and application. These entry conditions will be used to design the new process. 

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Both the need to reduce experimental costs and increasing reHabiHty of mathematical modeling have led to growing acceptance of computer-aided process analysis and simulation, although modeling should not be considered a substitute for either practical experience or reHable experimental data. 

Himmelblau, D. M. and Bischoff, K. B., Process Analysis and Simulation, Deterministic Approach, John Wiley Sons, New York, 1968. 

Khan, M., Y. Chen (2005), Preliminary Process Analysis and Simulation of Thermochemical Hydrogen Using Copper-chloride Cycle , 3rd Information Exchange Workshop on Hydrogen Production, Oarai, Japan. 

Additional information together with applications concerning these various types of balance can be found in D. M. Himmelblau and K. B. Bischoif, Process Analysis and Simulation, Swift Publish ing Co., Austin, Tex., 1980. 

D.M.Himmelblau and K.B. Bischoff, Process Analysis and Simulation Deterministic systems, John Wiley and Sons, Inc., New York.London. Sydney, 1968. 

PRELIMINARY PROCESS ANALYSIS AND SIMULATION OF THE COPPER-CHLORINE THERMOCHEMICAL CYCLE FOR HYDROGEN GENERATION... 

Finally, it is worth noting that the support for process managers provided by the AHEAD system so far could easily be extended with respect to process analysis and simulation aspects. Within another sub project 12/14 in... 

Ding, Z. and Lee, L. J. (1999), Process analysis and simulation of resin injection pultrusion , Proceedings of the 31st International SAMPE Technical Conference, Chicago, USA. 

Himmelblau DM, Bischoff KB (1968) Process analysis and simulation deterministic systems. WUey, New York... 

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