Steam is being condensed in a surface condenser of a steam turbine under vacuum using cooling water. The flowrate of the steam to the condenser is 50 kmol/h at a temperature and pressure of 55°C and 0.12 bar, respectively. The pressure drop in the condenser is 0.02 bar. At the outlet of the condenser, the steam is completely condensed without any subcooling. Cooling water is available at a temperature and pressure of 25°C and 5 bar, respectively. Design the cooler such that the cooling water temperature at the condenser outlet is 35°C. The maximum allowable pressure drop of the cooling water is 0.5 bar. Develop three dynamic models of this condenser using the “constant duty” option, the “constant medium temperature” option, and the “LMTD” option. Compare the transient response of the process outlet temperature for each of the options when the flowrate of the steam is step decreased to 45.5 kmol/h.