The plant thus also uses less fuel to raise steam without the need for any additional investment. The solution has already been implemented for the production of newsprint at a plant of the Rhein Papier paper company in Hürth, Germany, where it has lowered the need for live steam by more than three percent.
Most of the energy consumed in the paper production process is used to dry the very wet webs of paper. The webs are passed over multiple rolls, called dryer cylinders, which are heated to different temperatures using steam. The paper thus gradually releases its moisture to the atmosphere in the drying hood. In order for such a system to operate with high efficiency, the temperatures of the more than 30 cylinders over which the paper web runs must be perfectly matched to the air conditions inside the drying hood. Imbalanced settings lead to unnecessarily high steam consumption or, in the worst case, to condensation in the drying hood and thus to production outages.
The Siemens software solves this problem. It derives the optimal steam pressure as a function of the thickness and weight of the paper. Using these data, the system calculates optimized target values for all drying-relevant parameters and adapts these to the prevailing process conditions. The software also regulates the volume and temperature of the hood intake air and the volume of the hood exhaust air, depending on the moisture in the room. This ensures that humidity is never too high, and the paper can dry ideally.
Sipaper APC DrySec is a module of the Sipaper solutions platform developed specifically for the paper and cellulose industry, and it can be connected to Siemens process control systems and third-party systems. Environment-friendly solutions for the paper industry are part of Siemens’ environmental portfolio, with which the company generated about €28 billion in sales in fiscal year 2010.
Dr. Norbert Aschenbrenner | Siemens InnovationNews
New manufacturing process for SiC power devices opens market to more competition
14.09.2017 | North Carolina State University
Quick, Precise, but not Cold
17.05.2017 | Fraunhofer-Institut für Lasertechnik ILT
At the productronica trade fair in Munich this November, the Fraunhofer Institute for Laser Technology ILT will be presenting Laser-Based Tape-Automated Bonding, LaserTAB for short. The experts from Aachen will be demonstrating how new battery cells and power electronics can be micro-welded more efficiently and precisely than ever before thanks to new optics and robot support.
Fraunhofer ILT from Aachen relies on a clever combination of robotics and a laser scanner with new optics as well as process monitoring, which it has developed...
Plants and algae use the enzyme Rubisco to fix carbon dioxide, removing it from the atmosphere and converting it into biomass. Algae have figured out a way to increase the efficiency of carbon fixation. They gather most of their Rubisco into a ball-shaped microcompartment called the pyrenoid, which they flood with a high local concentration of carbon dioxide. A team of scientists at Princeton University, the Carnegie Institution for Science, Stanford University and the Max Plank Institute of Biochemistry have unravelled the mysteries of how the pyrenoid is assembled. These insights can help to engineer crops that remove more carbon dioxide from the atmosphere while producing more food.
A warming planet
Our brains house extremely complex neuronal circuits, whose detailed structures are still largely unknown. This is especially true for the so-called cerebral cortex of mammals, where among other things vision, thoughts or spatial orientation are being computed. Here the rules by which nerve cells are connected to each other are only partly understood. A team of scientists around Moritz Helmstaedter at the Frankfiurt Max Planck Institute for Brain Research and Helene Schmidt (Humboldt University in Berlin) have now discovered a surprisingly precise nerve cell connectivity pattern in the part of the cerebral cortex that is responsible for orienting the individual animal or human in space.
The researchers report online in Nature (Schmidt et al., 2017. Axonal synapse sorting in medial entorhinal cortex, DOI: 10.1038/nature24005) that synapses in...
Whispering gallery mode (WGM) resonators are used to make tiny micro-lasers, sensors, switches, routers and other devices. These tiny structures rely on a...
Using ultrafast flashes of laser and x-ray radiation, scientists at the Max Planck Institute of Quantum Optics (Garching, Germany) took snapshots of the briefest electron motion inside a solid material to date. The electron motion lasted only 750 billionths of the billionth of a second before it fainted, setting a new record of human capability to capture ultrafast processes inside solids!
When x-rays shine onto solid materials or large molecules, an electron is pushed away from its original place near the nucleus of the atom, leaving a hole...
19.09.2017 | Event News
12.09.2017 | Event News
06.09.2017 | Event News
25.09.2017 | Power and Electrical Engineering
25.09.2017 | Health and Medicine
25.09.2017 | Physics and Astronomy