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Aufsatz
On the track of human errors - Procedure and results of an innovative assembly planning method
(2018-03-07)
Manual assembly operations are the endmost place of the production process and with it represent a melting pot for organizational, time-related and qualitative errors of manufacturing. Because competitive advantages are increasingly determined in the manual assembly, the creation of economical and reliable work steps is of fundamental importance for future business success. For that reason, at the institute of the authors, a procedure has been developed to use the knowledge of the Expert System for Task Taxonomy that ...
Aufsatz
Adapting Kano's Theory for weighting and implementing customers requirements on a software tool for assessing human reliability in manual assembly
(2018)
The following paper illustrates the conception of an Excel-based software tool developed to predict human error probabilities in manual assembly lines. In this regard, the paper clearifies how reliable risk analyses of manual work tasks can be carried out with the help of a software tool. Furthermore, to initiate a high user-friendliness, a high acceptance and a high level of dissemination, this paper deals with a Kano survey concerning customer requirements on the developed software tool. As a result, it will be ...
Aufsatz
Increasing energy efficiency of milk product batch sterilisation
(2018-09-07)
The food industry is a large energy consumer and most heat demands in food processing are low-temperature. The aim of this study is to develop and simulate innovative retrofits or redesigns that unlock the heat recovery potential of industrial batch sterilisation processes. The case study focuses on the whey cream process, although the method and results apply to similar batch sterilisation processes. The initial situation is compared to energy efficient designs based on “Energy Storage” and “Rescheduling”. Using a ...
Aufsatz
Predictive Simulation-based Optimisation of Cooling System Including a Sprinkler Tank
(2018)
Prerequisite for an efficient cooling energy system is the knowledge and the optimal combination of different operating conditions of individual compression and free cooling chillers. The performance of cooling systems depends on its part load performance and its condensing temperature, which are often unknown. Recorded energy data remains unused and manufacturers' data significantly differs from the real performance. For this purpose, manufacturer and real data are combined and continuously adapted to form partial ...
Dissertation
Methodology development and assessment of lower carbon industrial process heat through solar energy and heat pumps
(2018-05-24)
The reduction of energy consumption in industrial processes, notably within low temperature industries, leads to greater economic gain and lower carbon emissions. Numerous energy audits and case studies within the food and beverage industry suggest that initial efforts to reduce energy consumption should focus on energy efficiency measures such as heat recovery and process optimization due to their lower cost of implementation. Eventually, however, an efficiency limit is reached and the only way to further reduce ...
Dissertation
Unsicherheiten von Ertragsprognosen für Photovoltaik-Kraftwerke unter besonderer Berücksichtigung langfristiger Variationen des Solarstrahlungs-Potenzials
(2018-08-27)
Ziel dieser Arbeit ist die realistische Quantifizierung der bei der Erstellung von Ertragsprognosen auftretenden Unsicherheiten unter besonderer Berücksichtigung langfristiger Variationen des Solarstrahlungs-Potenzials. Daneben sollten mögliche Verbesserungs-Potenziale zur Prognose der Erträge von PV-Kraftwerken identifiziert und umgesetzt werden. Dazu wird zunächst die Konzeption und Methodik von Ertragsgutachten für PV-Kraftwerke systematisch erfasst und beschrieben. Die relevanten ...
Dissertation
Proaktive Tätigkeitsunterstützung
(2018-12)
In der vorliegenden Dissertation wird eine Methode zur Identifikation von durchgeführten Tätigkeiten anhand der Pupillendynamik entwickelt. Dieses Methode bildet die Grundlage für eine kontextabhängige Unterstützung bei der Durchführung von Tätigkeiten durch ein Nutzerassistenzsystem. Hierzu werden aus der Literatur Merkmale zusammengetragen, die sich aus der Pupillendynamik ableiten lassen und sich zur Kontexterkennung eignen. Aufbauend auf diesen grundlegenden Merkmalen, werden differenziertere Merkmale entwickelt, ...
Buch
Schlussbericht zum Projekt SimCast – Simulationsgestützte Prognose der Dauer von Logistikprozessen
(2018)
Für den kundenindividuellen Anlagenbau in der Unikat- und Kleinserienfertigung sind die termingerechte Fertigstellung, Lieferung und Inbetriebnahme einer Anlage entscheidende Wettbewerbsfaktoren. Bei der Planung neuer Projekte kann das bisher aus Projekten erworbene Wissen allerdings nicht 1:1 in ein neues Projekt übertragen werden, da die Parameter und die Dauer der Montage- und Logistikprozesse von dem jeweils zu montierenden Bauteil abhängig sind. Aus diesem Grund wird diese Prozessdauer heute nur grob abgeschätzt; ...
Dissertation
Simulation-based optimization of solar thermal systems
(2018)
In this PhD thesis application of numerical methods to simulation-based optimization of solar thermal systems both in the planning process and in operation is investigated. The optimization process starting from definition of a target function and specification of optimization parameters, moving forward with application of an optimization algorithm and ending up by sensitivity analysis at the found optimum, is described in detail. A hybrid genetic CHC – binary search algorithm is proposed and applied. As a combination ...