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Techno-Economic Assessment of Turboexpander Application at Natural Gas Regulation Stations

Authors :
Szymon Kuczyński
Mariusz Łaciak
Andrzej Olijnyk
Adam Szurlej
Tomasz Włodek
Source :
Energies, Vol 12, Iss 4, p 755 (2019)
Publication Year :
2019
Publisher :
MDPI AG, 2019.

Abstract

During the natural gas pipeline transportation process, gas stream pressure is reduced at natural gas regulation stations (GRS). Natural gas pressure reduction is accompanied by energy dissipation which results in irreversible exergy losses in the gas stream. Energy loss depends on the thermodynamic parameters of the natural gas stream on inlet and outlet gas pressure regulation and metering stations. Recovered energy can be used for electricity generation when the pressure regulator is replaced with an expander to drive electric energy generation. To ensure the correct operation of the system, the natural gas stream should be heated, on inlet to expander. This temperature should be higher than the gas stream during choking in the pressure regulator. The purpose of this research was to investigate GRS operational parameters which influence the efficiency of the gas expansion process and to determine selection criteria for a cost-effective application of turboexpanders at selected GRS, instead of pressure regulators. The main novelty presented in this paper shows investigation on discounted payback period (DPP) equation which depends on the annual average natural gas flow rate through the analyzed GRS, average annual level of gas expansion, average annual natural gas purchase price, average annual produced electrical energy sale price and CAPEX.

Details

Language :
English
ISSN :
19961073
Volume :
12
Issue :
4
Database :
Directory of Open Access Journals
Journal :
Energies
Publication Type :
Academic Journal
Accession number :
edsdoj.fd1ad252de2439498de229c88dbfa2c
Document Type :
article
Full Text :
https://doi.org/10.3390/en12040755