Effect of inlet temperature

Hetsroni et al. (2005) evaluated the effect of inlet temperature, channel size and fluid properties on energy dissipation in the flow of a viscous fluid. For fully developed laminar flow in circular micro-channels, they obtained an equation for the adiabatic increase of the fluid temperature due to viscous dissipation ... 

One of the main conclusions of Kenat et al., was that the largest changes in polymer, mean-chain length, occur from the effect of inlet temperature changes and that, therefore, controlling inlet temperature, rather than reactor temperature, is beneficial to reactor performance. 

Study the effect of inlet temperature with constant jacket temperature. Note the hot spot effect in the reactor temperature profile. 

Effect of Inlet Temperatures. Figure 5 illustrates the effect of inlet fuel and air temperature on the maximum and minimum solid temperature (Na=Nq2=25.9 mole/cm2.s ND=0 %2=97.4 mole/cm. s ... 

Figure 11. Axial activity profiles, one-dimensional model. Constant pattern fronts. Effect of inlet temperature...

Figure E9.3.6 Effect of inlet temperature on exit temperature distributed feed, adiabatic operation.

The same situation is reflected in Fig. 11.5.e-7, which shows the effect of inlet temperature on the exit conditions again two steady states are found. Also, when... 

The same situation is reflected in Fig. 11.5.5-7, which shows the effect of inlet temperature on the exit conditions again two steady states are found. Also, when the inlet temperature is decreased below 107°C, the reactor is extinguished. It also follows from Fig. 11.5.5-7 that the maximum conversion is obtained close to the conditions leading to extinction, as shown already in the preceding discussion. The simulation also predicts that the reactor would extinguish when the pressure is decreased from 240 bar to 160 bar or the inerts... 

Fig. 10. Effect of inlet dry air temperature on allowable load, where the inlet relative humidity is 50% water-inlet temperature is 43.3°C water exit...

The effects of gas temperature and pressure are significant. Tlie higher the gas temperature and/or the lower the gas pressure, the larger tlie gas volume that flows tlirough tlie expander. Higher inlet temperatures and lower inlet pressures would result from reduced gas mass flow. 

Figure 16-12 shows the effect of ambient temperature on the horsepower output of a typical two-shaft gas turbine engine. At high temperatures the horsepower is limited by the maximum allowable power turbine inlet temperature. At low ambient temperatures, the available horsepower is limited by the maximum allowable air compressor speed. 

Figure 5 depicts the effect of calcination temperature on subsequent catalyst activity after reduction at 300°C (572°F). Activity was measured in laboratory tubular reactors operating at 1 atm with an inlet gas composition of 0.40% CO, 25% N2, and 74.6% H2, and an inlet temperature of 300°C. Conversion of CO is measured and catalyst activity is expressed as the activity coefficient k in the first order equation ... 

Fig. 8.7a-c The effect of inlet liquid temperature, gap size and wall heat flux from the wall on the pressure in inlet cross-section pressure of the micro-channel. Reprinted from Peles et al. (2000) with permission... 

Fig. 14. Influence of inlet SO2 concentration on behavior and performance in adiabatic, packed-bed SOj converters operating under periodic flow reversal. Simulation results for t = 30 min, SV = 514 h 1, Ta = 25°C (a) effect of inlet SO2 vol% on the temperature profile in the catalyst bed, (b) influence of inlet S02 on converter performance and the velocity of the temperature front. (Figure adapted from Xiao and Yuan, 1996, with permission of the authors.)...

FIG. 24-64 Effect of inlet air ambient temperature on the power output of a typical GT. If ambient air at 95°F (35°C) were cooled to 50°F (10°C), the gross GT power output would be increased by approximately 22 percent, and the gross heat rate improved by 3.7 percent. Operated at its ISO conditions [15°C ( 59°F) at sea level], GT rated performance is 100 percent. (Turbine Air Systems www.tas.com.)... 

Kang, H.A. and Shin, M.G., Effect of inlet air temperature and atomizing air pressure on fluidized bed coating efficiency of broken peanut, Korean J. Food Sci. Tech., 34 (2002) 924-926. 

Fig. 6. Effect of inlet gas temperature on outlet gas temperature, type I conditions.

As we see, for a specific reaction, the higher the inlet concentration, the higher the conversion and the exit temperature. This is a result of the positive effect of the temperature rise, due to the exothermic nature of the reaction, on the rate coefficient and thus on the reaction rate and conversion. Note that for higher inlet CO concentration, the conversion for the isothermal operation is the same, while for the adiabatic operation the conversion is higher for higher inlet concentrations. Furthermore, the conversion in the adiabatic fixed bed is always higher in comparison to the isothermal fixed bed. Of course, these results are such because the reaction is of first order in respect to CO. 

Fig. 3. Predicted effect of initial temperature ramp on HC emissions over the first 210s of the FTP test. The inlet temperatures used are shown in Fig. 4.

Fig. 4. Inlet temperatures fed to the model to predict the effect of initial temperature ramp. The measured data have an initial temperature ramp of 6 K/s.

Schaefer, T. and O. Worts, Control of Fluidized Bed Granulation, III. Effects of Inlet Air Temperature and Liquid Flow Rate on Granule size and Size Distribution. Control of Moisture Content of Granules in the Drying Phase, Arch. Pharm. Chemi. Sci., Ed. 6, 1978, pp. 1-13. 

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