Energy Savings in the Hydraulic Circuit of Agricultural Tractors

Borghi, Massimo; Zardin, Barbara; Pintore, Francesco; Belluzzi, Francesco

doi:10.1016/j.egypro.2014.01.038

Cited by 40 publications

(19 citation statements)

References 6 publications

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“…In [1], Murrenhoff et al describe the most recent energy-efficient hydraulic architectures for mobile applications, spanning from the "valve-systems", in which independent metering or digital valves can be used instead of the traditional ones, as well as "pump-controlled" systems, which eliminate the directional valves, and energy recovery systems, which use energy from braking or lowering of loads to recover hydraulic energy with accumulators and hydraulic motors. Other authors focused on the applications of one energy-saving architecture on a specific off-road vehicle, such as analyzing the independent metering system impact on the energy saving during some typical duty cycles, applied to excavators or forwarder machines, as in [2], or even to agricultural tractors, as in [3]. All this interest is well legitimized when considering that the average efficiency of hydraulic systems in industrial applications is 50% and drops to 21% for mobile applications, according to [4].…”

Section: Introductionmentioning

confidence: 99%

Pressure Losses in Hydraulic Manifolds

et al. 2017

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Hydraulic manifolds are used to realize compact circuit layout, but may introduce a high pressure drop in the system. Their design is in fact oriented more toward achieving minimum size and weight than to reducing pressure losses. This work studies the pressure losses in hydraulic manifolds using different methods: Computational Fluid Dynamic (CFD) analysis; semi-empirical formulation derived from the scientific literature, when available; and experimental characterization. The purpose is to obtain the pressure losses when the channels' connections within the manifold are not ascribable to the few classic cases studied in the literature, in particular for 90 • bends (elbows) with expansion/contraction and offset intersection of channels. Moreover, since CFD analysis is used to predict pressure losses, general considerations of the manifold design may be outlined and this will help the design process in the optimization of flow passages. The main results obtained show how CFD analysis overestimates the experimental results; nevertheless, the numerical analysis represents the correct trends of the pressure losses.

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Section: Introductionmentioning

confidence: 99%

Pressure Losses in Hydraulic Manifolds

et al. 2017

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“…If the designer try to predict the overall loss as the The numerical analysis results have a very good agreement with the experimental ones when multiple elbows are considered, and this is due to the fact that the general purpose turbulence model chosen (the k-ε model) performs very well in these cases. When one elbow or two "distant" elbows are considered the distance between numerical and experimental results is higher as shown in [1]. However, as shown in [2], the CFD analysis is able to follow the trends of the pressure drops in each of the analyzed test cases.…”

Section: Multiple Elbowsmentioning

confidence: 98%

“…In fact, efficiency of hydraulic systems is a key topic, discussed by researchers and industry in a common effort to reduce dissipations which are quite extensive in this kind of system. The authors in [1], for example, analyzed the energy dissipations for the hydraulic system of an agricultural tractor, highlighting how much the pressure losses in the valves critically affect efficiency. As also explained in [2], hydraulic systems, in particular for mobile applications such as off-road machines, have both to fit in the usually narrow spaces of the vehicles and to guarantee functionality with acceptable efficiency.…”

Section: Introductionmentioning

confidence: 99%

Pressure Losses in Multiple-Elbow Paths and in V-Bends of Hydraulic Manifolds

et al. 2017

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Hydraulic manifolds are used to realize compact circuit layouts, but may introduce high pressure losses in the system because their design is usually oriented to achieving minimum size and weight more than reducing the pressure losses. The purpose of this work is to obtain the pressure losses when the internal connections within the manifold are creating complex paths for the fluid and the total loss cannot be calculated simply as the sum of the single losses. To perform the analysis both Computational Fluid Dynamic (CFD) analysis and experimental tests have been executed. After the comparison between numerical and experimental results, it was possible to assess that the numerical analysis developed in this work is able to depict the correct trends of the pressure losses also when complex fluid path are realized in the manifold. Successively, the numerical analysis was used to calculate the pressure loss for inclined connections of channels (or V-bends), a solution that is sometimes adopted in manifolds to meet the design requirements aimed towards the minimum room-minimum weight objective.

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“…Borghia et al 2014 Reduce dynamic loads in the system (13 articles). Based on the review of scientific articles (40 of articles from databases "Sciencedirect" and "Scopus" basis of keywords "Energysaving in hydraulic drive" in total) in this paper can say that each of the basic methods is equivalent.…”

Section: Topic Analysis Of Methodsmentioning

confidence: 99%

“…From the simulation results one with best energysaving properties is the R(F) -system. Borghia et al (2014) in the paper and leaning on the work of Huova et al (2010), Meyer et al (2011) and Yao et al (2014) comparison different strategy for energysaving in hydraulic drive.…”

Section: Review Of Energy-saving Technologiesmentioning

confidence: 99%

Review of Energy-saving Technologies in Modern Hydraulic Drives

Karpenko

Bogdevičius

2017

Science - Future of Lithuania

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Abstract. This paper focuses on review of modern energysaving technologies in hydraulic drives. Described main areas of energy conservation in hydraulic drive (which in turn are divided into many under the directions) and was established the popularity of them. Reviewed the comparative analysis of efficiency application of various strategies for energy saving in a hydraulic drive. Based on the review for further research a combined method of realtime control systems with energysaving algorithms and regeneration unit -selected for maxing efficiency in hydraulic drive. Scientific papers (40 papers), what introduced in review, is not older than 15 years in the databases "Sciencedirect" and "Scopus".

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Energy Savings in the Hydraulic Circuit of Agricultural Tractors

Cited by 40 publications

References 6 publications

Pressure Losses in Hydraulic Manifolds

Pressure Losses in Hydraulic Manifolds

Pressure Losses in Multiple-Elbow Paths and in V-Bends of Hydraulic Manifolds

Review of Energy-saving Technologies in Modern Hydraulic Drives

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