SBMPursuesHomogenousConceptforCrushing,ScreeningPlants

Efficient, Eco-Friendly

The degree of efficiency of diesel-electric drive systems can be considerably increased if energy-intensive hydraulic drive components are eliminated. At about 80 percent, the efficiency exceeds that of diesel-electric systems without or with optimized load-dependent control (ca. 40 percent / ca. 50 percent); and with grid connection the efficiency factor comes to more than even 90 percent. And this of course directly influences fuel consumption: The diesel engines of the SBM plants operating at a speed of 1,500 to 1,800 rpm adjustable in steps consume more than 40 percent less than all-hydraulic systems.

Compared to models with directly driven crushers, consumption is still reduced by 20 percent, the manufacturer said.

Given the sharp increase in fuel prices and in spite of varying electricity costs, it can be assumed that the 60 percent benefit in energy costs due to all-electric grid operation still rating as a rule of thumb has long ago further shifted in favor of hybrid technology. By now SBM anticipates that due to saving operational costs, diesel-electric hybrid plants with a high all-electric workload will — due to lower maintenance costs resulting from less wear and a longer service life — fully pay off even over a few years only.

With full flexibility in diesel-autarkic operation where SBM hybrids provide further environmental benefits on top of the reduced hydraulic volume and the consumption-based low emissions of their EU-stage-V-power plants: Thus, the elaborately enclosed diesel-generator units win over due to low noise emissions without load-dependent fluctuations. If switched over to all-electric operation, the noise generated by the same plant will decrease by another 6 dB significantly reducing noise emissions depending on geographical surroundings, the manufacturer said.

Even in all-electric “zero-emission” operation, possible effects on the immediate working environment are para- mount: In tunnel construction or indoor recycling they are quite obvious, but for city-center demolition tenders technologies efficiently reducing exhaust emissions are becoming more and more important. This grants hybrid electrified plants a key competitive edge — not to mention the great image bonus of a company reducing its CO² footprint. For more information, visit www.sbm-mp.at. 