A novel modification on preheating process of natural gas in pressure reduction stations to improve energy consumption, exergy destruction and CO2 emission: Preheating based on real demand

Olfati, Mohammad; Bahiraei, Mehdi; Veysi, Farzad

doi:10.1016/j.energy.2019.02.090

Cited by 31 publications

(5 citation statements)

References 24 publications

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“…One of the possible solutions to counteract the Joule-Thomson effect is to preheat the natural gas [6]. Various resources are used to achieve preheating, including the combustion of the same gas; however, this procedure reduces the economic and energy profitability of the process.…”

Section: Introductionmentioning

confidence: 99%

Energy, Exergy, Exergoeconomic Analysis, and Optimization in a Natural Gas Decompression Station with a Vortex Tube and Geothermal Preheating

Villalón-López,

Ambriz-Díaz,

Rubio-Maya

et al. 2024

Sustainability

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Natural gas stations require a preheating stage to prevent the formation of hydrates inside of them provoked by a sudden decompression process of the natural gas. The preheating process has been investigated to improve efficiency and to reduce costs as well. This work studies the behavior of a natural gas decompression station with a first-stage preheating process using a vortex tube and a geothermal heat exchanger, followed by a second stage involving a water bath heater (heating vat). An energetic, exergetic, and exergoeconomic study has been carried out based on a mathematical model and the theory of exergetic cost, obtaining key thermodynamic and thermoeconomic variables, including exergy flows and equipment costs. A heat flow of 26.41 kW was obtained in the geothermal preheating stage; meanwhile, a 60.43 kW heat flow was obtained in the heating vat. The results showed a saving in station fuel using only 2.046% of the natural gas in the system at the second preheating stage. Also, the system was optimized, obtaining a 15.73% reduction in the decompressed natural gas cost. These findings show the possibility of implementing these systems in zones with many geothermal resources to reach a constant, profitable natural gas supply in areas where a pipeline network does not exist.

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Section: Introductionmentioning

confidence: 99%

Energy, Exergy, Exergoeconomic Analysis, and Optimization in a Natural Gas Decompression Station with a Vortex Tube and Geothermal Preheating

Villalón-López,

Ambriz-Díaz,

Rubio-Maya

et al. 2024

Sustainability

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show abstract

“…This adaptation is carried out in a pressure reduction station where the NG is throttled to liberate the excess pressure. However, based on the Joule-Thomson effect, the NG temperature plunges, leading to the unsuitable hydrates formation [2,3]. To avoid this issue, the NG is traditionally preheated before the expansion by means of a boiler, which consumes part of the inlet gas.…”

Section: Introductionmentioning

confidence: 99%

“…To avoid this issue, the NG is traditionally preheated before the expansion by means of a boiler, which consumes part of the inlet gas. Thus, efforts have been focused either on the reduction of the NG boiler consumption [3] or a replacement of this device by, e.g., solar collectors [4], geothermal exchangers [5] or turboexpanders [6]. In this context, using Ranque-Hilsch vortex tubes (VT) seems a promising alternative since energy input is not required to increase the gas temperature before the expansion.…”

Section: Introductionmentioning

confidence: 99%

Reducing Energy Consumption and CO2 Emissions in Natural Gas Preheating Stations Using Vortex Tubes

Guerrero,

Alcaide-Moreno,

González-Espinosa

et al. 2023

Energies

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This work proposes an innovative method for adjusting the natural gas from the grid to the consumer pipeline requirements in a full-scale pressure reduction station. The use of two counterflow vortex tubes instead of the traditional boiler to preheat the gas before throttling is demonstrated as a powerful alternative. Thus, a reduction of fossil fuel consumption is reached, which amounts to 7.1% less CO2 emitted. To ensure the optimal configuration, the vortex tube was thoroughly characterized in laboratory facilities using nitrogen as the working fluid. Various operating conditions were tested to determine the most efficient setup. Computational Fluid Dynamics (CFD) simulations were conducted with nitrogen to validate the behavior of the vortex tube. Subsequently, the working fluid was switched to methane to assess the performance differences between the two gases. Finally, the vortex tubes were deployed at a full-scale installation and tested under real consumption demand. The results obtained from this study offer promising insights into the practical implementation of the proposed method for adjusting the natural gas flow, highlighting its potential for reducing fossil fuel consumption and minimizing CO2 emissions. Further improvements and refinements can be made based on these findings.

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“…There have been more than 100 published papers related to the first law evaluation of nanofluid flow in the microchannels by the end of 2020, while the second law analysis of nanofluid flow in the microchannels is less than 10 [26, 27], and absolutely no document was found on second law analysis in wavy microchannels working with nanofluids. This indicates insufficient attention to the second law of thermodynamics for MCHS, while due to the growing concerns about the energy consumption as well as the loss of available energy in diverse sections [28][29][30][31], the essentialness of evaluating the second law of thermodynamics is even more substantial compared to the first law. This is indeed what the current article delivers; that is addressing this gap of the literature (the novelty) by conducting a second law analysis (including entropy generation and exergy destruction rates quantification) in two types of wavy microchannels working with various aqueous nanofluids.…”

Section: Introductionmentioning

confidence: 99%

Entropy generation and exergy destruction in two types of wavy microchannels working with various aqueous nanofluids using a multi-phase mixture model

Jamshidmofid

Olfati²,

Arabkoohsar³

et al. 2023

J Therm Anal Calorim

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show abstract

A novel modification on preheating process of natural gas in pressure reduction stations to improve energy consumption, exergy destruction and CO2 emission: Preheating based on real demand

Cited by 31 publications

References 24 publications

Energy, Exergy, Exergoeconomic Analysis, and Optimization in a Natural Gas Decompression Station with a Vortex Tube and Geothermal Preheating

Energy, Exergy, Exergoeconomic Analysis, and Optimization in a Natural Gas Decompression Station with a Vortex Tube and Geothermal Preheating

Reducing Energy Consumption and CO2 Emissions in Natural Gas Preheating Stations Using Vortex Tubes

Entropy generation and exergy destruction in two types of wavy microchannels working with various aqueous nanofluids using a multi-phase mixture model

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