Managing Level Control in Petroleum Industries Using LabVIEW

Authors

V.Ashok, Aditya Kumar, Rohit Sharma, Venkatesh Babu, Jeyanth Jasper

B.Tech III rd year,Dept. of Instrumentation & Control Engineering, SRM University, Tamilnadu.

Abstract

This is a method for determining and controlling the liquid level, in oil storage and maintenance unit at petroleum industries. Especially in LPG (liquid petroleum gas) which is more complicate to maintain the level because of its balancing liquid cum vapor state, it is very necessary to maintain the liquid level as well as the pressure of the vapor which is above the liquid. This Lab VIEW program may be specifically applied to determine and maintain the level of LPG in the storage tank at predefined level and also the vapor pressure which is present at the surface of the liquid. It is necessary to burn the excess vapor of the LPG when it exceeds the limited pressure due to the more inflow of LPG compared to the outflow, this must be done to avoid huge disaster. This process is programmed in Lab VIEW using PID tool kit to achieve the better control over the process as compared to PLC and DCS. The output of level control sensor is given to the PID controller. The error signal generated by the PID controller is fed to the system using DAQs. The set point is fixed based on the process. The generated error signal can be recorded in an array and analysis can be done.