Zuverlässigkeit und Verfügbarkeit technischer Systeme

Eberlin, Stefan; Höck, Barbara

doi:10.1007/978-3-658-03573-0

Cited by 22 publications

(10 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For instance, small leakage of a LOHC line or slow decrease of power provided by a FC does not lead directly to failure of the entire system. Hence, a failure criterion must be defined for such cases …”

Section: Reliability and Resiliencementioning

confidence: 99%

Reliability of liquid organic hydrogen carrier‐based energy storage in a mobility application

Uhrig

Kadar

Müller

2020

Energy Science & Engineering

View full text Add to dashboard Cite

Liquid organic hydrogen carriers (LOHC) are a technology that allows storing hydrogen in a safe and dense manner by reversible chemical conversion. They constitute a very promising option for energy storage, transport, and release combined with electric power generation by fuel cells in large‐scale applications like trains. In order to establish trains running on LOHC, it is mandatory to ensure the reliability of the system. This study evaluates various system configurations concerning reliability and resilience. The fault tree analysis method has been used to quantify the probability of failure. The S‐P matrix was applied to assess the different failure modes in context of severity as well as their probability. The MTTF of the system can be more than doubled by introducing single redundancy for the fuel cell and the reactor, while more than two redundant components diminish the positive effect on reliability due to higher complexity. It is estimated that the systems full functionality is available for more than 97% of its operating time.

show abstract

Section: Reliability and Resiliencementioning

confidence: 99%

Reliability of liquid organic hydrogen carrier‐based energy storage in a mobility application

Uhrig

Kadar

Müller

2020

Energy Science & Engineering

View full text Add to dashboard Cite

show abstract

“…The converter reliability calculation in this study follows the general equation used in the literature (cf. [32]). The equation describes the relative proportion of functioning components to be expected after a given time.…”

Section: Converter Reliabilitymentioning

confidence: 99%

“…In order to ensure the reliable operation of electrical components, they must be maintained in specified periods [32][33][34]. In this work, the transmission system is divided into different maintenance areas.…”

Section: Maintenancementioning

confidence: 99%

Reducing Operational Costs of Offshore HVDC Energy Export Systems Through Optimized Maintenance

et al. 2020

View full text Add to dashboard Cite

For the grid connection of offshore wind farms today, in many cases a high-voltage direct current (HVDC) connection to the shore is implemented. The scheduled maintenance of the offshore and onshore HVDC stations makes up a significant part of the operational costs of the connected wind farms. The main factor for the maintenance cost is the lost income from the missing energy yield (indirect maintenance costs). In this study, we show an in-depth analysis of the used components, maintenance cycles, maintenance work for the on- and offshore station, and the risks assigned in prolonging the maintenance cycle of the modular multilevel converter (MMC). In addition, we investigate the potential to shift the start date of the maintenance work, based on a forecast of the energy generation. Our findings indicate that an optimized maintenance design with respect to the maintenance behavior of an HVDC energy export system can decrease the maintenance-related energy losses (indirect maintenance costs) for an offshore wind farm to almost one half. It was also shown that direct maintenance costs for the MMC (staff costs) have small effect on the total maintenance costs. This can be explained by the fact that the additional costs for maintenance staff are two orders of magnitude lower than the revenue losses during maintenance.

show abstract

“…The national grid is at the highest voltage. It is a functional link to the lower-level networks and is a 1 AR/AU/BE/CA/CH/CL/CN/CN/DK/DE/ES/FI/FR/GB/GR/HU/IE/IT/ KR/LU/MY/NZ/NL/NO/PL/PT/ RO/RU/STR/ UA/US 2 Union for the Coordination of the Transmission of Electricity, currently part of ENTSO-E 3 There are different interpretations of supply quality; from User Requirements for a Cellular Grid, availability is used in the sense of [34] 4 Unplanned interruptions including all events; the longest was 11.6 min/908 min in 2014 5 Example: UCTE network area/cf. technological possibility solution space, substantial systemic risk, defining social sustainability 6 Example: German 'Energiewende' towards wind energy and photovoltaic systems Benthaus Energy, Sustainability and Society (2019) 9:50 significant "electrical network node" in the system.…”

Section: Technologymentioning

confidence: 99%

“…A sustainability dimension is incorporated through a new technological and economic availability. Availability is understood in the sense of [32] and represents the utilization potential of the system. The sustainability component now added to the state vectors u ∈ Ω u equals the product from the availability parameter v tv and the total load for a national macrocell E D Nat: ðtÞ from Eq.…”

Section: System Statesmentioning

confidence: 99%

A coupled technological-sociological model for national electrical energy supply systems including sustainability

Benthaus

2019

Energ Sustain Soc

View full text Add to dashboard Cite

Global trends in the development and use of electricity utilities and assets are practically irreversible. In industrialized nations, capacity factors have grown so large that users may expect freely available electrical potential energy at all times and in almost all locations. Economically capitalizing on this trend means maximizing energy provision and use to boost gross domestic product growth rates. Electricity is now a basic indicator of social development; it is to the cultural-technological dimension what breathing air is to the physiological-biological dimension, the implication being that sustainable development of provision systems has become a matter of international concern. This article presents a decision basis for the design of sustainable national electrical energy supply systems, incorporating country-specific boundary conditions in the form of user requirements to be specified by users. The basis is a solution space of technologically possible systems, obtained by combining generalized user requirements and physical limitations to generate the solution states. As all technological options for the system are brought under consideration, this approach represents a comprehensive comparative analysis. The decision process ensues by assigning to each solution state a set of (newly defined) system risk factors. Particular consideration is given to evaluating the system's ability to meet the user requirements, i.e., interruption-free provision. The central benchmark is the technological-economic availability. From this is obtained a sustainability boundary, the boundary between quantifiable and unquantifiable economic loss potentials. This article deliberately avoids referencing specific technological solutions, with the justification that the basis of the user's decision should be independent of technological considerations. The sole exception is a reference to the currently used technology, which forms the starting point.

show abstract

Zuverlässigkeit und Verfügbarkeit technischer Systeme

Cited by 22 publications

References 0 publications

Reliability of liquid organic hydrogen carrier‐based energy storage in a mobility application

Reliability of liquid organic hydrogen carrier‐based energy storage in a mobility application

Reducing Operational Costs of Offshore HVDC Energy Export Systems Through Optimized Maintenance

A coupled technological-sociological model for national electrical energy supply systems including sustainability

Contact Info

Product

Resources

About