process control. pleaae help

Example 3.6 Steam-Heated Heat Exchanger. Problem Statement. Develop a dynamic model of the steam-heated heat exchanger shown in Figure 3.5.14. The feed enters the heat exchanger and flows through a number of parallel tubes that absorb heat from the condensing steam. The outlet temperature of the feed stream is measured by a temperature sensor/transmitter. Determine the dynamic response of this process for a step increase in the steam pressure that results in an increase in the steam temperature from 250F to 260F. Figure 3.5.14 Schematic of a steam heated heat exchanger