Modelling and simulation of turbo-expander instead of pressure reducing valve for high pressure natural gas lines to supply clean electricity; applying Matlab, Hysys and Ansys-Fluent
Volume Title: 1
Authors
1Chemical Engineering Faculty, Sahand university of Thechnology, P.O.BOX:51355-1996, Sahand new town, Tabriz,Iran
2Chemical Engineering Faculty, Sahand University of Technology, Sahand New Town, Tabriz, Iran
3Chemical Engineering Faculty, Sahand University of Technology, Sahand New Town, Tabriz, Iran
Abstract
The present work reveals the use of turbo-expander as an efficient device for electricity generation by replacing instead of pressure reducing valves in the high pressure gas line. Modelling and simulation of turbo-expander was conducted by using Kumar Ghosh algorithm and computational fluid dynamics. To the best of our knowledge is to code the mentioned algorithm by Matlab software which was linked to Hysys software for measuring the thermodynamics properties of natural gas (Automation of Matlab-Hysys). The validation was carried out by comparing with the determined data from the previous work on the nitrogen gas flow in the turbo-expander. Results indicated the acceptable error (2.51%) from the validation of coded algorithm. The study of natural gas behavior was also performed by Ansys-Fluent software for the main parts of turbo-expander including nozzle, blades and diffuser. Turbulent flow was also considered by using K-Ɛ model in the simulation. Results illustarted the good agreement between presented investigation and the documented data in the open literature.
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