Modeling and multi-objective optimization of cyclone separators using CFD and genetic algorithms

Safikhani, Hamed; Hajiloo, A.; Ranjbar, Mostafa

doi:10.1016/j.compchemeng.2010.07.017

Cited by 91 publications

(36 citation statements)

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“…Vortex formation has been a subject of research interest [15]- [17] as vortices can be both useful, such as for cyclone separators [18], [19], and harmful, such as to hydraulic machinery and structures in hydropower plants [20], [21]. However, the application of vortices for hydropower generation, GVHP, has not been considered in detail to date.…”

Section: Introductionmentioning

confidence: 99%

A Parametric Experimental Investigation of the Operating Conditions of Gravitational Vortex Hydropower (GVHP)

Power¹,

McNabola²,

Coughlan³

2015

JOCET

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Abstract-Globalenergy consumption is growing considerably, raising such issues as increased energy-related greenhouse gas emissions, reduced security of supply, and growing fuel costs. Renewable resources, such as hydropower, offer an alternative energy source to meet the growing demand. Small hydropower (SHP) has been a major focus of hydropower research in recent years, as many of the large scale hydroelectric opportunities around the world have already been exploited. In particular, low head SHP is gaining interest as traditional turbines, such as the Kaplan and Pelton turbines, are typically limited to heads greater than 3m. Gravitational vortex hydropower (GVHP) is one such low head hydropower solution. GVHP exploits the energy available in a vortex flow, enabling hydropower generation at heads as low as 0.7m. A vertical axis turbine is placed in the centre of a vortex flow and rotates with the flow, thus generating mechanical energy. This paper describes a parametric experimental investigation of the operating conditions of GVHP. Various flow rates, inlet conditions, blade sizes and blade numbers were tested and the turbine rotational speed, vortex height and applied resistance force were recorded for each setting. The power input, power output and efficiency were then calculated and compared for the various settings. It was found that the turbine efficiency increases with blade size and blade number for the blade configurations tested. Maximum power outputs were found for the largest flow rate tested and when there was a considerable resistance force applied to the turbine. Finally, of three inlet heights tested, a height of 25 cm above the tank base (35% of the overall tank height) was found to be optimum for turbine performance. These results have implications both for future research and for practice, with energy generating applications in low head rivers and in wastewater networks.Index Terms-Clean energy, experimental model, gravitational vortex hydropower (GVHP), low head, new energy device.

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Section: Introductionmentioning

confidence: 99%

A Parametric Experimental Investigation of the Operating Conditions of Gravitational Vortex Hydropower (GVHP)

Power¹,

McNabola²,

Coughlan³

2015

JOCET

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“…The software could be used to compute optimal sensor height from live data, with subsequent adjustments of the physical sensors that would improve process control and efficiency. Based on a parameter study across a broad range of possible scenarios, the results could be formulated in terms of more general, phenomenological mathematical approaches such as Pareto models that would allow for a faster prediction of unevaluated scenarios [47,48]. This data base could also be used for a faster identification of a range of cooling scenarios that are appropriate for pre-installed, non-movable sensors.…”

Section: Discussionmentioning

confidence: 99%

End-User Software for Efficient Sensor Placement in Jacketed Wine Tanks

2018

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Abstract:In food processing, temperature is a key parameter affecting product quality and energy consumption. The efficiency of temperature control depends on the data provided by sensors installed in the production device. In the wine industry, temperature sensor placement inside the tanks is usually predetermined by the tank manufacturers. Winemakers rely on these measurements and configure their temperature control accordingly, not knowing whether the monitored values really represent the wine's bulk temperature. To address this problem, we developed an end-user software which 1. allows winemakers or tank manufacturers to identify optimal sensor locations for customizable tank geometries and 2. allows for comparisons between actual and optimal sensor placements. The analysis is based on numerical simulations of a user-defined cooling scenario. Case studies involving two different tanks showed good agreement between experimental data and simulations. Implemented based on the scientific Linux operating system gmlinux, the application solely relies on open-source software that is available free of charge.

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“…As seen before, the cyclone with P/D=1 has the maximum collection efficiency but the maximum pressure drop, similarly the cyclone with P/D=2 has the least pressure drop but the least collection efficiency. In fact collection efficiency and pressure drop are in conflict with each other, so a multi-objective optimization process to find the best value of P/D is required (Safikhani et al, 2010c). Gas velocity vectors at the middle plane inside the cyclones are shown in Fig.…”

Section: Operating Conditions Valuesmentioning

confidence: 99%

Effects of Using Ribs on Flow Pattern and Performance of Cyclone Separators

Farahani

Tahmasbi

Safikhani

et al. 2011

Engineering Applications of Computational Fluid Mechanics

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ABSTRACT:In this paper, the effects of using ribs on the flow pattern and performance of cyclone separators are investigated using CFD techniques. The Reynolds averaged Navier-Stokes equations with Reynolds Stress Turbulence Model (RSTM) are solved by use of the finite volume method based on the SIMPLE pressure correction algorithm in the computational domain. The Eulerian-Lagrangian computational procedure is used to predict particles tracks in cyclones with different rib pitch to cyclone diameter (P/D) ratios. The velocity fluctuations are simulated using Discrete Random Walk (DRW). The results show that using ribs in cyclones leads to higher collection efficiency but higher pressure drop and the cyclone with P/D equal to 1 has the maximum collection efficiency among the ribbed cyclones and the cyclone without ribs has the least pressure drop.

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Modeling and multi-objective optimization of cyclone separators using CFD and genetic algorithms

Cited by 91 publications

References 10 publications

A Parametric Experimental Investigation of the Operating Conditions of Gravitational Vortex Hydropower (GVHP)

A Parametric Experimental Investigation of the Operating Conditions of Gravitational Vortex Hydropower (GVHP)

End-User Software for Efficient Sensor Placement in Jacketed Wine Tanks

Effects of Using Ribs on Flow Pattern and Performance of Cyclone Separators

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