### Abstract

Original language | English |
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Pages (from-to) | 317-322 |

Number of pages | 6 |

Journal | Procedia CIRP |

Volume | 11 |

Early online date | 27 Sep 2013 |

DOIs | |

Publication status | Published - 2013 |

Event | 2nd International Through-Life Engineering Services Conference - Cranfield, United Kingdom Duration: 5 Nov 2013 → 6 Nov 2013 Conference number: 2 |

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*Procedia CIRP*,

*11*, 317-322. https://doi.org/10.1016/j.procir.2013.07.008

}

*Procedia CIRP*, vol. 11, pp. 317-322. https://doi.org/10.1016/j.procir.2013.07.008

**Particle size effects on optimal sizing and lifetime of pipelines transporting multi-sized solid-liquid mixtures.** / Kollar, Laszlo E.; Mishra, Rakesh; Asim, Taimoor.

Research output: Contribution to journal › Conference article

TY - JOUR

T1 - Particle size effects on optimal sizing and lifetime of pipelines transporting multi-sized solid-liquid mixtures

AU - Kollar, Laszlo E.

AU - Mishra, Rakesh

AU - Asim, Taimoor

PY - 2013

Y1 - 2013

N2 - A life-cycle cost analysis model is developed in this study, to examine the effects of particle size distribution of the solid particles to be transported on the optimal sizing and lifetime of the pipelines used for transportation of solid-liquid mixtures. The method determines the lifetime of the pipe corresponding to the least annual total cost per unit length of the pipe. The optimum diameter is obtained so that the total cost per unit pipe length per unit volume of the transported mixture throughout this lifetime is minimum. The total cost includes manufacturing and repair cost of pipe, cost of pumping power as well as the cost of power required for the crushing of particles from an initial size distribution to a desirable particle size distribution. The repair cost of pipe and cost of pumping power increase as the pipe becomes older due to more frequent pipe breaks and due to the pipe wear that makes wall roughness, and thereby pressure drop, greater. These costs together with the cost of power for crushing must be considered for through life costing of pipelines. Since the transportation of solid-liquid mixtures is maintained by several pumping stations in long pipelines, the spacing between two successive pumping stations must also be determined. The study shows interdependence of parameters such as the lifetime, the optimum diameter, the corresponding spacing for a given pumping power and the particle size distribution of solid particles transported in the pipeline. Furthermore, the method also provides the interrelation between the total length of pipeline when crushing is economical and the different particle size distributions.

AB - A life-cycle cost analysis model is developed in this study, to examine the effects of particle size distribution of the solid particles to be transported on the optimal sizing and lifetime of the pipelines used for transportation of solid-liquid mixtures. The method determines the lifetime of the pipe corresponding to the least annual total cost per unit length of the pipe. The optimum diameter is obtained so that the total cost per unit pipe length per unit volume of the transported mixture throughout this lifetime is minimum. The total cost includes manufacturing and repair cost of pipe, cost of pumping power as well as the cost of power required for the crushing of particles from an initial size distribution to a desirable particle size distribution. The repair cost of pipe and cost of pumping power increase as the pipe becomes older due to more frequent pipe breaks and due to the pipe wear that makes wall roughness, and thereby pressure drop, greater. These costs together with the cost of power for crushing must be considered for through life costing of pipelines. Since the transportation of solid-liquid mixtures is maintained by several pumping stations in long pipelines, the spacing between two successive pumping stations must also be determined. The study shows interdependence of parameters such as the lifetime, the optimum diameter, the corresponding spacing for a given pumping power and the particle size distribution of solid particles transported in the pipeline. Furthermore, the method also provides the interrelation between the total length of pipeline when crushing is economical and the different particle size distributions.

KW - life cycle cost analysis

KW - optimal sizing

KW - particle size distribution

KW - pipeline

KW - solid-liquid mixture

U2 - 10.1016/j.procir.2013.07.008

DO - 10.1016/j.procir.2013.07.008

M3 - Conference article

VL - 11

SP - 317

EP - 322

JO - Procedia CIRP

JF - Procedia CIRP

SN - 2212-8271

ER -