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Aufsatz
Total Site Utility Systems Optimisation for Milk Powder Production
(2016)
This study applies the Total Site Heat Integration method, in conjunction with a detailed process and utility model, to investigate three methods to increase the energy efficiency of the utility supply system for milk powder production. Sequentially explored opportunities are: (1) increasing boiler efficiency through condensing economisers, (2) waste heat recovery from the chiller unit, and (3) Combined Heat and Power (CHP) for electricity production. The basis for the analysis is the anticipated future milk powder ...
Buch
Optische Verformungsmessung an heterogenen Werkstoffsystemen
(kassel university press, 2020)
Im Rahmen der vorliegenden Arbeit wird die Anwendung der optischen Verformungsmessung auf heterogene Werkstoffsysteme untersucht, wobei dieses Verfahren auf unterschiedlichen Skalenebenen eingesetzt wird. Als erstes wird die digitale Bildkorrelation zur Temperaturüberwachung bei Hochtemperaturzugversuchen bis 350 °C an 0,6 mm dünnen lotplattierten Aluminiumprüfkörpern eingesetzt. Flächige Dehnungsauswertungen innerhalb des Prüfbereichs bestätigen die homogene Temperaturverteilung, wobei die Temperatur gleichzeitig ...
Aufsatz
Automatic Time Series Segmentation as the Basis for Unsupervised, Non-Intrusive Load Monitoring of Machine Tools
(2019)
Detailed energy monitoring and benchmarking at the individual component level is necessary to increase energy efficiency in complex production systems. Non-intrusive load monitoring (NILM) provides an economical solution for operational state detection and load disaggregation without the need for large-scale use of fine-grained energy meters. Existing supervised NILM approaches require detailed training data including control information about individual devices. Unsupervised approaches, on the other hand, often ...
Aufsatz
Numerical Two-Scale Simulations of Damage Evolution at Refractory Materials
(2014-02-25)
Fracture and damage processes on micro- and mesoscale are combined with macroscale simulations applying numerical multiscale approaches. Cracks and grain boundaries are reproduced in cell models that take account of transand intercrystalline crack growth. The global, in general thermomechanical boundary value problem is considered within a continuum mechanics framework. Two approaches are presented combining the scales. Simple processes on the smaller level are described in analytical models including the damage ...
Aufsatz
System efficient integration of standby control and heat pump storage systems in manufacturing processes
(2019-05-24)
Prerequisite for system efficiency towards an industrial energy transition is the reducing of energy demand on the process level. In typical manufacturing systems with machine tools and washing machines, the proper design of intelligent standby control and heat pump storage system (HPS) represent high efficiency. The integration of HPS is complicated due to high non-continuity, especially when implementing a standby control system. Our approach aims at designing one single HPS for multiple heat sources and sinks. ...
Preprint
Large-scale heat pumps: market potential and barriers, classification and estimation of efficiency
(2019-12-20)
Heat pumps powered by renewable electricity have a significant potential to become a critical technology to disruptively decarbonize an economy. An essential step towards this goal is the development of an accurate understanding and model of how heat pumps in large-scale implementations perform in terms of economics, energy, and the environment. In this study, the influence of system design and operating conditions on the Coefficient of Performance (COP) of large-scale (> 50 kWth) electric driven mechanical compression ...
Aufsatz
Assessment of probabilistic distributed factors influencing renewable energy supply for hotels using Monte-Carlo methods
(2017-04-05)
This paper investigates the use of renewable energies to supply hotels in island regions. The aim is to evaluate the effect of weather and occupancy fluctuations on the sensitivity of investment criteria. The sensitivity of the chosen energy system is examined using a Monte Carlo simulation considering stochastic weather data, occupancy rates and energy needs. For this purpose, algorithms based on measured data are developed and applied to a case study on the Canary Islands.
The results underline that electricity ...
Dissertation
Entwicklung und experimentelle Regelung eines servopneumatischen räumlichen Mehrachsenprüfstands
(2004-11-08)
In dieser Arbeit wurde ein räumlich bewegter pneumatischer Mehrachsenprüfstand als spezielle mechanische Variante eines Parallelroboters entwickelt, im Labor aufgebaut und in Rechnersimulationen sowie in Laborexperimenten regelungstechnisch untersucht. Für diesen speziellen Parallelroboter MAP-RTS-6 wurden Regelalgorithmen, die mittels moderner Verfahren der linearen und nichtlinearen Regelungstheorie abgeleitet wurden, hinsichtlich ihrer praktischen Anwendbarkeit, Echtzeitfähigkeit und Qualität entwickelt, implementiert ...
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 ...