초록 ▼

An automated control system for the control of mixed refrigerant-type liquified natural gas production facilities comprising optimization of functional parameters, concurrent monitoring and adjustment of critical operational limits, and maximization of production functions. Optimization is accomplis

An automated control system for the control of mixed refrigerant-type liquified natural gas production facilities comprising optimization of functional parameters, concurrent monitoring and adjustment of critical operational limits, and maximization of production functions. Optimization is accomplished by adjusting parameters including mixed refrigerant inventory, composition, compression ratio, and compressor turbine speeds to achieve the highest product output value for each unit of energy consumed by the facility.

대표청구항 ▼

A method for efficiently operating a liquefied natural gas production facility comprising the steps of: monitoring key variables representative of the state of operation of said facility; determining a desired production rate for said facility; comparing said desired production rate to the value of

A method for efficiently operating a liquefied natural gas production facility comprising the steps of: monitoring key variables representative of the state of operation of said facility; determining a desired production rate for said facility; comparing said desired production rate to the value of a key variable representative of the current production rate of said facility; setting a plurality of controllers to change production to a rate equal to said desired rate; and controlling and optimizing mixed refrigerant composition and mixed refrigerant compression ratio as well as other plant operating variables with respect to overall efficiency by means of adjusting an operating parameter selected from the group consisting of: (a) mixed refrigerant make up rate; (b) mixed refrigerant venting; (c) mixed refrigerant liquid draining; (d) compressor turbine speed; (e) relative mixed refrigerant liquid and vapor flows; and (f) fuel header pressure.