Mann+Hummel (Germany)

Investments in capital expenditures (CapEx) for corporate real estate (CRE) assets, especially in a manufacturing environment, are always highly competing against investments in production and core business-related equipment and projects. The maximum amount of acceptable CapEx to the organisation seems to be only determined by the previous year’s amount of depreciation, completely independent from the actual need — and health — of the portfolio. This paper recaps the well-established concept of the Facility Condition Index (FCI)1 — a tool that shows the amount of needed building repairs in relation to the costs of replacing the building, to give a snapshot of deferred maintenance and general condition. It explains the concept through a multi-year case study of (light) industrial assets in freehold and triple net (NNN) lease environments. It also touches on new (reporting) requirements resulting from the European Union (EU) Green Deal2 with relevance to real estate and a potential revision of this indexing methodology.

Oil mist coalescence separators are widely used downstream of screw compressors. Unfortunately, due to high concentration most of the available literature reporting particle sizes in raw or clean gas of screw compressors is on model systems at atmospheric pressure and room temperature. To study oil mist coalescence separators under real-world conditions, the pressurized aerosol needs to be diluted.In this work, two newly developed isobaric and isothermal dilution systems for particle size measurements using an optical particle counter (200 nm–10 µm) in the application scenario are presented. For both systems, one a single-stage and the other a triple-stage system, transfer functions were determined in the laboratory using a pressurized oil atomizer.As a proof of concept, the triple-stage dilution system was used on a compressor test bench to study the influence of operating conditions (varying pressure and volume flow) on the particle size distribution and concentration in raw and clean gas. Both raw and clean gas particle size distributions showed most particles in the size range below 500 nm. The achievable dilution factor of 1000 was sufficient for measuring the raw gas concentration.On a second compressor test bench, the single-stage dilution system was used to study the influence of different coalescence separators on clean gas particle size distribution and concentration. Three separators were used for experiments: one industry-typical reference separator, one with less layers, and one with a weakened entrainment separation fleece. As expected, the particle size distributions showed clear differences, i.e., higher penetration or increased entrainment.Copyright © 2023 American Association for Aerosol Research

A well-known information reuse approach is to exploit event logs for process discovery and optimization. However, process discovery is rarely used for product development projects. This is because information systems in product development, e. g., Product-Lifecycle-Management (PLM) systems, do not provide the event logs required by process discovery algorithms. Additionally, existing algorithms struggle with development projects, as these are unstructured and rich in variety. In this paper, we propose a novel approach to process discovery in order to make it applicable and tailored to product development projects. Instead of using flat event logs, we provide a graph-based data structure that is able to represent both activities and data of product development projects with the dataflow between activities. Based on this structure, we can leverage provenance available in PLM systems. Furthermore, we may use frequent subgraph mining to discover process patterns. Such patterns are well suited to describe different variants and common sub-processes of unstructured processes. Using a prototype, we evaluate this approach and successfully discover prevailing patterns. These patterns may be used by engineers to support their decision-making or help improve the execution of development projects.

Blick, Theo (2022): Adelonychia and Adelonychia nigrostriata are the valid names for the mygalmorph spider genus and species Diplothele and Diplothele walshi (Araneae, Barychelidae). Zootaxa 5087 (3): 494-496, DOI: 10.11646/zootaxa.5087.3.7

Abstract Modern drivetrain architectures that include e-Axles and hybrid transmissions require filtration solutions with higher demands to protect all system components and to reduce the energy consumption. MANN+HUMMEL has developed a new generation of filters that are covering these demands. In this contribution it will be presented how these filters increase the degrees of freedom for the development of lubrication circuits of modern drivetrains significantly by offering an ultra-compact and flexible installation space, lowest differential pressure or highest filtration efficiencies. The new MANN+HUMMEL filter media portfolio MULTIGRADE O-eM provides a high system security with long lifetimes at low energy dissipations, which contributes to enlarge the range of e-drives and also to lower the CO2 emission. With MANN+HUMMEL’s numerical development tools filter media as well as filters can be adapted digitally to fast changing demands and challenging installation spaces. To multiply these advantages a new generation of pleated suction-side filters has been developed. With up to 60 percent more filter area the new concept uses the given installation space to a maximum. A drainage grid keeps the energy efficiency as large as possible and media performance at a maximum level over the whole filter life. Based on that, a MANN+HUMMEL oil management system with highest filtration capabilities will be presented that can deal with air bubbles, intelligent cooling function and integrated oil drying.KeywordsLubricationOil cleanlinessFiltration

One of the most frequently discussed mobility topics is the future of drivetrains. In internal combustion engines (ICE), oil filtration has always played a role and has largely contributed to a long lifetime of engines, transmissions and cooling cycles. Beyond that, oil filtration will play a major role in future drivetrain concepts. In lubricating and cooling, contaminants like particles and water have to be removed to assure a long lifetime also of future drivetrain components. Modern drivetrain concepts and trends are pointing towards hybrid motors or e-drives with e-axles, bio fuels, downsized components and new, more efficient lubricants or coolant oils. During operation in present and future drivetrains, the quality of oils is chemically as well as physically influenced in a way that ageing can occur faster or more intense. This brings up increased challenges on the oil filter media during the operation. Oil filter media made of synthetic fibers, fully or partially, are facing these challenges.