Weight averaged inlet temperature WAIT

Reaction Temperature. By changing the reaction temperature, it is possible to change the octane number of the gasoline. The parameter used to characterize the reaction temperature in a reforming unit with several reactors is the weight average inlet temperature (WAIT), defined as the sum of the inlet temperature to each reactor multiplied by the weight percent of the total catalyst mass... 

After we enter the feedstock information, we must define operating temperatures and associated process variables. We enter the Reactor Control section and define the operating temperature of each bed. There are two ways specify reactor inlet temperature. In the first method, we enter the weight-average inlet temperature (WAIT) for all the reactors and specify a bias for each reactor. In the second method, we enter a reactor reference temperature and specify a bias for each reactor. We use the second method to accurately fix the inlet temperature of each bed. We recommend this method when running the model for the first time. This ensures that inlet temperatures are accurate for the purposes of calibration. We show how to input the reactors temperatures in Figure 5.58. 

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