Patents by Inventor Srinivas NURANI RAMACHANDRAN

Srinivas NURANI RAMACHANDRAN has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Controlling refrigerant compression power in a natural gas liquefaction process
    Patent number: 11150015
    Abstract: The present invention relates to a method of controlling the production of a liquefied natural gas product stream (31) obtained by removing heat from natural gas by indirect heat exchange with an expanded heavy mixed refrigerant and an expanded light mixed refrigerant. The method comprises executing a control loop comprising maintaining the flow rate of the liquefied natural gas product stream (31) at a dependent set point and maintaining the flow rates of the heavy mixed refrigerant (60a) and the light mixed refrigerant (65) at operator manipulated set points (80, 81). The method further comprises executing an override control loop comprising: determining an override set point (95?) for the flow rate of the liquefied natural gas and computing an override set point (80?) for the flow rate of the heavy mixed refrigerant and an override set point (81?) to reduce residual available power of the electric motor.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: October 19, 2021
    Assignee: SHELL OIL COMPANY
    Inventors: Adriaan Spaander, Srinivas Nurani Ramachandran
  • CONTROLLING REFRIGERANT COMPRESSION POWER IN A NATURAL GAS LIQUEFACTION PROCESS
    Publication number: 20180356149
    Abstract: The present invention relates to a method of controlling the production of a liquefied natural gas product stream (31) obtained by removing heat from natural gas by indirect heat exchange with an expanded heavy mixed refrigerant and an expanded light mixed refrigerant. The method comprises executing a control loop comprising maintaining the flow rate of the liquefied natural gas product stream (31) at a dependent set point and maintaining the flow rates of the heavy mixed refrigerant (60a) and the light mixed refrigerant (65) at operator manipulated set points (80, 81). The method further comprises executing an override control loop comprising: determining an override set point (95?) for the flow rate of the liquefied natural gas and computing an override set point (80?) for the flow rate of the heavy mixed refrigerant and an override set point (81?) to reduce residual available power of the electric motor.
    Type: Application
    Filed: December 6, 2016
    Publication date: December 13, 2018
    Inventors: Adriaan SPAANDER, Srinivas NURANI RAMACHANDRAN