Condenser and Vaporizer Controls

Vaporization controls depend on the operating pressure. If vacuum is required to vaporize the process fluid and if steam jets are used to create that vacuum, it is recommended that a pressure controller be installed on the steam inlet to maintain the optimum pressure required by the ejector. For processes in which load variations are expected, the operating costs can be lowered by installing a larger and a smaller ejector and automatically switching to the small unit when the load drops off, thereby reducing steam demand. 

When steam-heated reboilers are used, only one degree of freedom is available therefore, only one controller can be installed without overdefining 

Post- Oil Energy Technology After the Age of Fossil Fuels 

---