Comparison of methods for modeling the gas-dynamic characteristics of high-pressure centrifugal compressors that ensure the operation of field low-temperature separation units using the example of a modification with a pressure ratio of up to 1.9...2.1

Abstract

Objective. Currently, for the development of Valanginian and other deeplying (compared to the Cenomanian) deposits, low-temperature separation (LTS) units with turboexpander units (TDA) are used, and the booster compressor station (BCS) is one of the key technological facilities necessary to ensure the efficient operation of promising technologies for gas preparation using the NTS method with TDA turboexpander units for transport. The purpose of the study is to substantiate optimal operating modes, as well as to develop measures for the technological development of a booster compressor station based on the use of methods for modeling the operation of centrifugal compressors, gas pumping units and, directly, the booster compressor station. Method. The following methods were used: the method of reduced characteristics, the refined method of reduced characteristics, and the two-dimensional approximation method. The basis of the mathematical model of the research objects is the gas-dynamic characteristics of centrifugal compressors. Result. The results of a comparison of methods for modeling HDC (reduced characteristics method, refined method of reduced characteristics, two-parameter approximation method) of high-pressure pulp and paper mills are presented using the example of a pulp and paper mill with a pressure ratio of up to 1.9...2.1, intended for equipping gas compressor units with a unit power of 16.0 MW as part of field operations. DKS. An analysis and comparison of the obtained modeling results with actual data was carried out. Conclusion. The accuracy of the mathematical model of the GDC PPM as part of the field booster compressor stations that ensure the operation of NTS installations with TDA determines the accuracy of the assessment of energy consumption and the technical condition of the gas pumping units, as well as calculations of future operating modes of gas pumping equipment, which are carried out to solve a number of applied problems, including determining the timing of equipment modernization or reconstruction of the station.

Keywords

• compressor station
• gas compressor units
• centrifugal compressors
• high-pressure centrifugal compressors
• mathematical modelling of centrifugal compressors
• reduced characteristic method
• refined reduced characteristic method
• low-temperature separation units