TY - DATA
AB - Die Energieaufnahme von Haushaltskältegeräten ist seit den 1990er Jahren erheblich gesunken. Dieser Wert wird von den Herstellern im Neuzustand der Geräte unter Normbedingungen bestimmt. Wie jedes technische System unterliegen jedoch auch Haushaltskältegeräte einem Alterungsprozess, der zu einem Anstieg der Energieaufnahme über die Zeit führt. Im Rahmen dieser Dissertation wurde auf der Grundlage von 100 Messungen der Energieaufnahme, die an 32 Geräten über einen Zeitraum von 21 Jahren durchgeführt wurden, ein Alterungsmodell entwickelt. Dieses Modell ist das erste, das mit Hilfe von Daten der Energieaufnahme real gealterter Geräte entwickelt wurde. Es beschreibt einen Anstieg der Energieaufnahme von 27 % über die durchschnittliche Einsatzzeit eines Haushaltskältegeräts von 16 Jahren. Der stärkste Anstieg erfolgt in den ersten fünf Betriebsjahren. Durch Diffusionsvorgänge in dem im Gehäuse verbauten Polyurethan-Schaum wird das im Zellgas vorhandene Kohlenstoffdioxid durch Luft ersetzt. Hierdurch steigt die Wärmeleitfähigkeit des Schaums um ca. 33 % an, wodurch sich die Energieaufnahme der Geräte erhöht. Des Weiteren wurde der Einsatz von Paraffinen als Phasenwechselmaterial in Haushaltskältegeräten untersucht. Durch deren Einsatz konnte die Energieaufnahme gesenkt und die Funktionalität der Geräte gesteigert werden. Hierfür sind detaillierte Kenntnisse der Materialkenndaten der Paraffine notwendig. Die Wärmeleitfähigkeit der verschiedenen Paraffin-Stoffgruppen in der festen Phase ist jedoch bisher nur unzureichend untersucht worden. Daher wurde ein Messaufbau entwickelt, mit dem die Wärmeleitfähigkeit von festem Paraffin bestimmt werden kann, und es wurden entsprechende Messungen durchgeführt.
AU - Paul, Andreas
ID - 46753
TI - Analyse von Alterungsmechanismen im Hinblick auf die Effizienz von Haushaltskältegeräten
ER -
TY - JOUR
AB - The parameters required to calculate the energy efficiency of household refrigerating appliances (i.e. refrigerators, freezers and their combinations) are determined by standard measurements. According to regulations, these measurements are carried out when the appliances are new. It is known from previous studies that various technical aging mechanisms can increase electrical energy consumption by up to 36 % over a product lifespan of 18 years. In order to determine the time dependence of the energy consumption of household refrigerating appliances, repeated measurements are carried out in this work. Eleven new appliances are examined under standard measurement conditions. After just two years of operation, an additional energy consumption of up to 11 % is determined. Furthermore, 21 older appliances that had previously been measured in new condition are tested again after up to 21 years of operation. For these older appliances, an average increase of energy consumption of 28 % is found. For individual appliances, the maximum increase is 36 %. An aging model is developed on the basis of these measurement results, which may help to predict the aging-related increase of energy consumption of household refrigerating appliances. This model shows an average increase in energy consumption of 27 % for an appliance age of 16 years. Supplemental performance tests of eight compressors do not show any significant aging effects related to these devices after two years of operation. Furthermore, measurements of the thermal conductivity of aged polyurethane foam test samples are carried out and an increase of its thermal conductivity of 26 % over a period of about three years is determined.
AU - Paul, Andreas
AU - Baumhögger, Elmar
AU - Elsner, Andreas
AU - Reineke, Michael
AU - Hueppe, Christian
AU - Stamminger, Rainer
AU - Hoelscher, Heike
AU - Wagner, Hendrik
AU - Gries, Ulrich
AU - Becker, Wolfgang
AU - Vrabec, Jadran
ID - 29208
JF - Applied Thermal Engineering
KW - Industrial and Manufacturing Engineering
KW - Energy Engineering and Power Technology
SN - 1359-4311
TI - Impact of aging on the energy efficiency of household refrigerating appliances
VL - 205
ER -
TY - JOUR
AU - Betken, Benjamin
AU - Beckmüller, Robin
AU - Ali Javed, Muhammad
AU - Baumhögger, Elmar
AU - Span, Roland
AU - Vrabec, Jadran
AU - Thol, Monika
ID - 33255
JF - The Journal of Chemical Thermodynamics
KW - Physical and Theoretical Chemistry
KW - General Materials Science
KW - Atomic and Molecular Physics
KW - and Optics
SN - 0021-9614
TI - Thermodynamic Properties for 1-Hexene – Measurements and Modeling
ER -
TY - JOUR
AU - Abbas, Wameedh Khider Abbas
AU - Linnemann, Matthias
AU - Baumhögger, Elmar
AU - Vrabec, Jadran
ID - 20925
JF - Energy Conversion and Management
SN - 0196-8904
TI - Experimental study of two cascaded organic Rankine cycles with varying working fluids
ER -
TY - JOUR
AB - AbstractThe homogeneous density of the liquid phase is experimentally investigated for methyl diethanolamine. Data are obtained along five isotherms in a temperature range between 300 K and 360 K for pressures up to 95 MPa. Two different apparatuses are used to measure the speed of sound for the temperatures between 322 K and 450 K with a maximum pressure of 95 MPa. These measurements and literature data are used to develop a fundamental equation of state for methyl diethanolamine. The model is formulated in terms of the Helmholtz energy and allows for the calculation of all thermodynamic properties in gaseous, liquid, supercritical, and saturation states. The experimental data are represented within their uncertainties. The physical and extrapolation behavior is validated qualitatively to ensure reasonable calculations outside of the range of validity. Based on the experimental datasets, the equation of state is valid for temperatures from 250 K to 750 K and pressures up to 100 MPa.
AU - Neumann, Tobias
AU - Baumhögger, Elmar
AU - Span, Roland
AU - Vrabec, Jadran
AU - Thol, Monika
ID - 29168
IS - 1
JF - International Journal of Thermophysics
KW - Condensed Matter Physics
SN - 0195-928X
TI - Thermodynamic Properties of Methyl Diethanolamine
VL - 43
ER -
TY - JOUR
AU - Claes, Leander
AU - Chatwell, René Spencer
AU - Baumhögger, Elmar
AU - Hetkämper, Tim
AU - Zeipert, Henning
AU - Vrabec, Jadran
AU - Henning, Bernd
ID - 22925
JF - Measurement
SN - 0263-2241
TI - Measurement procedure for acoustic absorption and bulk viscosity of liquids
ER -
TY - THES
AU - Sonnenrein, Gerrit
ID - 42141
TI - Effizienzsteigerung von Haushaltskühlgeräten durch polymergebundene Phasenwechselmaterialien
ER -
TY - JOUR
AB - The increase of the thermal conductivity of PUR foam in the insulation of the cabinet is an important cause for aging processes of household refrigerating appliances. To determine the influence of the PUR foam aging on energy consumption, the development of a new measurement method is necessary be- cause current methods influence the aging behavior of household refrigerators and are therefore not applicable in general. Based on a latent heat sink, constructed as an ice water bucket, a new measure- ment method is developed to determine the k ·A value over time. With this method, the k ·A value of four household refrigerating appliances was determined over an interval of 14 months. The k ·A value increased between 3.6% and 11.5% during this period.
AU - Paul, Andreas
AU - Baumhögger, Elmar
AU - Elsner, Andreas
AU - Moczarski, Lukas
AU - Reineke, Michael
AU - Sonnenrein, Gerrit
AU - Hueppe, Christian
AU - Stamminger, Rainer
AU - Hoelscher, Heike
AU - Wagner, Hendrik
AU - Gries, Ulrich
AU - Freiberger, Alfred
AU - Becker, Wolfgang
AU - Vrabec, Jadran
ID - 20921
JF - International Journal of Refrigeration
SN - 0140-7007
TI - Determining the heat flow through the cabinet walls of household refrigerating appliances
ER -
TY - JOUR
AU - Sonnenrein, G.
AU - Baumhögger, Elmar
AU - Elsner, A.
AU - Morbach, A.
AU - Neukötter, M.
AU - Paul, A.
AU - Vrabec, J.
ID - 17589
JF - International Journal of Refrigeration
SN - 0140-7007
TI - Improving the performance of household refrigerating appliances through the integration of phase change materials in the context of the new global refrigerator standard IEC 62552:2015
ER -
TY - JOUR
AU - Javed, Muhammad Ali
AU - Rüther, Moritz
AU - Baumhögger, Elmar
AU - Vrabec, Jadran
ID - 16848
JF - Journal of Chemical & Engineering Data
SN - 0021-9568
TI - Density and Thermodynamic Speed of Sound of Liquid Vinyl Chloride
ER -
TY - CONF
AU - Claes, Leander
AU - Baumhögger, Elmar
AU - Rüther, Torben
AU - Gierse, Jan
AU - Tröster, Thomas
AU - Henning, Bernd
ID - 15490
T2 - Fortschritte der Akustik - DAGA 2020
TI - Reduction of systematic measurement deviation in acoustic absorption measurement systems
ER -
TY - JOUR
AB - The influence of latent heat storage elements on the cooling performance and the temperature rise time of household refrigerating appliances is studied experimentally in the context of the “new global refriger- ator standard”IEC 62552:2015. In addition to the daily energy consumption, this international standard- ization introduced performance tests for cooling capacity and temperature rise time. While the cooling capacity has long been anchored in various test procedures of consumer organizations, the temperature rise time, which has only been tested on freezers so far, will be a decisive factor in the future. Moreover, the need for so-called "smart appliances" that may balance power consumption is increasing since such devices may compensate the volatility of renewable energies and thus stabilize the power grid. Against this background, eight commercial household refrigerators and refrigerator-freezers are equipped with polymer-bound phase change materials (PCM) and their performance is determined under the new stan- dard test conditions. The results show that the introduction of PCM increases the cooling capacity by up to 33 % and also increases the temperature rise time by up to 145 %, without affecting power consump- tion, as compared to the unmodified refrigeration appliances.
AU - Sonnenrein, Gerrit
AU - Baumhögger, Elmar
AU - Elsner, Andreas
AU - Morbach, A.
AU - Neukötter, Moritz
AU - Paul, Andreas
AU - Vrabec, J.
ID - 21514
JF - International Journal of Refrigeration
SN - 0140-7007
TI - Improving the performance of household refrigerating appliances through the integration of phase change materials in the context of the new global refrigerator standard IEC 62552:2015
VL - 119
ER -
TY - JOUR
AB - Despite the omnipresence of household refrigeration appliances, there is still a lack of knowledge about their agerelated efficiency loss over time. Past studies provide basic evidence for increasing electricity consumption of cooling appliances with ageing but fail to investigate the associated technical wear. Concentrating on the degradation of the thermal insulation, we first determined the ageing process of sealed samples of polyurethane rigid foam by investigating changes in cell gas composition and thermal conductivity over time. Simultaneously, the main challenge was to develop an approach that investigates the age-related efficiency loss of the insulation without its destruction. This testing procedure is referred to as the Bonn method. The non-destructive Bonn method was applied to varying refrigerator models in a series of successive experiments to evaluate the insulation degradation over time. Subsequently, the physical relationship between the test value of the Bonn method and the heat transfer through the multi-layered compartment walls of domestic refrigeration appliances was established, ultimately characterising the degrading insulation in terms of increasing heat transfer. Our results give substantiated evidence that the efficiency loss of cooling appliances is greatly influenced by insulation degradation over time. The ageing of sealed samples of polyurethane rigid foam indicates a large initial increase of thermal conductivity by 15% within the first year, corresponding to a change in cell gas composition. These results are in line with those of the Bonn method, emphasising an increasing heat flow through the multi-layered compartment walls of domestic refrigerators with ageing. Therewith, the present study is of significance to a wide range of stakeholders and forms the basis for future research.
AU - Hueppe, Christian
AU - Geppert, Jasmin
AU - Stamminger, Rainer
AU - Wagner, Hendrik
AU - Hoelscher, Heike
AU - Vrabec, Jadran
AU - Paul, Andreas
AU - Elsner, Andreas
AU - Becker, Wolfgang
AU - Gries, Ulrich
AU - Freiberger, Alfred
ID - 21512
JF - Applied Thermal Engineering
SN - 1359-4311
TI - Age-related efficiency loss of household refrigeration appliances: Development of an approach to measure the degradation of insulation properties
VL - 173
ER -
TY - CONF
AU - Grabo, Matti
AU - Weber, Daniel
AU - Paul, Andreas
AU - Klaus, Tobias
AU - Bermpohl, Wolfgang
AU - Krauter, Stefan
AU - Kenig, Eugeny
ID - 15247
TI - Entwicklung eines thermischen 1D-Simulationsmodells zur Bestimmung der Temperaturverteilung in Solarmodulen
ER -
TY - GEN
AU - Grabo, Matti
AU - Weber, Daniel
AU - Paul, Andreas
AU - Klaus, Tobias
AU - Bermpohl, Wolfgang
AU - Kenig, Eugeny
ID - 15248
TI - Numerische Untersuchung der Temperaturverteilung in PCM-integrierten Solarmodulen
ER -
TY - CONF
AU - Claes, Leander
AU - Johannesmann, Sarah
AU - Baumhögger, Elmar
AU - Henning, Bernd
ID - 16271
T2 - 2019 International Congress on Ultrasonics
TI - Quantification of frequency-dependent absorption phenomena
ER -
TY - JOUR
AU - Linnemann, Matthias
AU - Nikolaychuk, Pavel Anatolyevich
AU - Muñoz-Muñoz, Y. Mauricio
AU - Baumhögger, Elmar
AU - Vrabec, Jadran
ID - 16305
JF - Journal of Chemical & Engineering Data
SN - 0021-9568
TI - Henry’s Law Constant of Noble Gases in Water, Methanol, Ethanol, and Isopropanol by Experiment and Molecular Simulation
ER -
TY - JOUR
AU - Thol, Monika
AU - Javed, Muhammad Ali
AU - Baumhögger, Elmar
AU - Span, Roland
AU - Vrabec, Jadran
ID - 13158
JF - Industrial & Engineering Chemistry Research
SN - 0888-5885
TI - Thermodynamic Properties of Dodecamethylpentasiloxane, Tetradecamethylhexasiloxane, and Decamethylcyclopentasiloxane
ER -
TY - JOUR
AU - Javed, Muhammad Ali
AU - Baumhögger, Elmar
AU - Vrabec, Jadran
ID - 13159
JF - Journal of Chemical & Engineering Data
SN - 0021-9568
TI - Thermodynamic Speed of Sound Data for Liquid and Supercritical Alcohols
ER -
TY - JOUR
AU - Javed, Muhammad Ali
AU - Baumhögger, Elmar
AU - Vrabec, Jadran
ID - 13189
JF - The Journal of Chemical Thermodynamics
SN - 0021-9614
TI - Thermodynamic speed of sound of xenon
ER -
TY - JOUR
AU - Grabo, Matti
AU - Weber, Daniel
AU - Paul, Andreas
AU - Klaus, Tobias
AU - Bermpohl, Wolfgang
AU - Krauter, Stefan
AU - Kenig, Eugeny
ID - 21519
JF - CHEMICAL ENGINEERING TRANSACTIONS
SN - 978-88-95608-73-0
TI - Numerical Investigation of the Temperature Distribution in PCM-integrated Solar Modules
VL - 76
ER -
TY - CONF
AU - Grabo, Matti
AU - Weber, Daniel
AU - Paul, Andreas
AU - Klaus, Tobias
AU - Bermpohl, Wolfgang
AU - Kenig, Eugeny
ID - 21521
TI - Numerische Untersuchung der Temperaturverteilung in PCM-integrierten Solarmodulen
ER -
TY - CONF
AU - Grabo, Matti
AU - Weber, Daniel
AU - Paul, Andreas
AU - Klaus, Tobias
AU - Bermpohl, Wolfgang
AU - Krauter, Stefan
AU - Kenig, Eugeny
ID - 21520
TI - Entwicklung eines thermischen 1D-Simulationsmodells zur Bestimmung der Temperaturverteilung in Solarmodulen
ER -
TY - CONF
AB - Wie jedes technische System unterliegen auch Haushaltskältegeräte einer alterungsbedingten Degeneration, die zu einem Anstieg der Energieaufnahme über die Lebensdauer dieser Geräte führt. Ursache hierfür sind verschiedene Effekte, die in dem vom BMWi geförderten Projekt ALGE untersucht werden. Aus den so gewonnenen Erkenntnissen sollen dann degenerationsbeständigere Haushaltskältegeräte entwickelt werden. Eine wichtige Alterungsursache ist der Anstieg der Wärmeleitfähigkeit des PUR-Schaums der Gehäuseisolierung. Zur Bestimmung dieses Einflusses auf die Energieaufnahme ist die Entwicklung neuer Messmethoden notwendig, die zerstörungsfrei sein und den realen Anwendungsbedingungen möglichst nahekommen sollen. Dazu wurde eine Wärmesenke entwickelt, die den Geräteinnenraum unabhängig vom Kältekreislauf abkühlt. Die Wärmesenke ist als Eiswasserbehälter ausgeführt, sodass die Schmelzenthalpie des Eises die durch die Isolierung in den Geräteinnenraum einfallende Wärme aufnimmt. Durch die Bestimmung der Abtauzeit einer bestimmten Eismenge kann so der alterungsbeeinflusste 𝑘∙𝐴-Wert des Gehäuses von Haushaltskältegeräten bestimmt werden.
AU - Paul, Andreas
AU - Moczarski, Lukas
AU - Gieselmann, Mirko
AU - Reineke, Michael
AU - Elsner, Andreas
AU - Baumhögger, Elmar
AU - Sonnenrein, Gerrit
AU - Vrabec, Jadran
ID - 21518
SN - 978-3-932715-52-5
TI - Bestimmung von Wärmeverlusten in Haushaltskältegeräten
ER -
TY - JOUR
AU - Grabo, Matti
AU - Weber, Daniel
AU - Paul, Andreas
AU - Klaus, Tobias
AU - Bermpohl, Wolfgang
AU - Krauter, Stefan
AU - Kenig, Eugeny
ID - 15250
JF - Chemical Engineering Transactions
SN - 2283-9216
TI - Numerical Investigation of the Temperature Distribution in PCM-integrated Solar Modules
ER -
TY - JOUR
AU - Thol, Monika
AU - Dubberke, Frithjof H.
AU - Baumhögger, Elmar
AU - Span, Roland
AU - Vrabec, Jadran
ID - 13160
JF - Journal of Chemical & Engineering Data
SN - 0021-9568
TI - Speed of Sound Measurements and a Fundamental Equation of State for Hydrogen Chloride
ER -
TY - JOUR
AU - Thol, Monika
AU - Dubberke, Frithjof H.
AU - Baumhögger, Elmar
AU - Span, Roland
AU - Vrabec, Jadran
ID - 13163
JF - Journal of Chemical & Engineering Data
SN - 0021-9568
TI - Speed of Sound Measurements and a Fundamental Equation of State for Hydrogen Chloride
ER -
TY - GEN
AU - Rutkai, Gábor
ID - 42162
TI - Large Scale Thermodynamic Data Generation with Molecular Simulation
ER -
TY - CONF
AU - Claes, Leander
AU - Chatwell, René Spencer
AU - Vrabec, Jadran
AU - Henning, Bernd
ID - 6556
SN - 978-3-9816876-4-4
T2 - PROCEEDINGS -- AMA Conferences 2017
TI - A Spectral Approach to Acoustic Absorption Measurement
ER -
TY - JOUR
AU - Dubberke, Frithjof H.
AU - Linnemann, Matthias
AU - Abbas, Wameedh Khider
AU - Baumhögger, Elmar
AU - Priebe, Klaus-Peter
AU - Roedder, Maximilian
AU - Neef, Matthias
AU - Vrabec, Jadran
ID - 13161
JF - Applied Thermal Engineering
SN - 1359-4311
TI - Experimental setup of a cascaded two-stage organic Rankine cycle
ER -
TY - JOUR
AU - Nikolaychuk, Pavel Anatolyevich
AU - Linnemann, Matthias
AU - Muñoz-Muñoz, Y. Mauricio
AU - Baumhögger, Elmar
AU - Vrabec, Jadran
ID - 13162
JF - Chemistry Letters
SN - 0366-7022
TI - Experimental and Computational Study on the Solubility of Argon in Propan-2-ol at High Temperatures
ER -
TY - THES
AU - Dubberke, Frithjof
ID - 42138
TI - Thermophysical properties from experimental speed of sound measurements for working fluids in organic Rankine cycles
ER -
TY - THES
AU - Köster, Andreas
ID - 42139
TI - Molekulare Simulation als effizientes Werkzeug zur Bestimmung thermodynamischer Stoffdaten
ER -
TY - THES
AB - Lightweight materials play an ever growing role in today's world. Saving on the mass of a machine will usually translate into a lower energy consumption. However, lightweight applications are prone to develop performance problems due to vibration induced by the operation of the machine. The Fraunhofer Institute for Manufacturing Technology and Advanced Materials in Dresden conducts research into the damping properties of composite materials. They are experimenting with hollow, particle filled spheres embedded in the lightweight material. Such a system is the technical motivation of this thesis. Ultimately, a numerical experiment to derive the coefficient of restitution is required. The simulation developed in this thesis is based on a discrete element method to track the individual particle and sphere trajectories. Based on a potential based approach for the particle interactions deployed in molecular dynamics, the behavior of the particles can be controlled effectively. The simulated volume is using reflecting boundaries and encloses the hollow sphere. In this work, a highly flexible memory structure was used with a linked cell approach to cope with the highly flexible mass of particles. This allows for a linear complexity of the method in regard to the particle number by reducing the computational overhead of the interaction computation. Multiple numerical experiments show the great effect the particles have on the damping behavior of the system.
AU - Steinle, Tobias
ID - 33
TI - Modeling and simulation of metallic, particle-damped spheres for lightweight materials
ER -
TY - JOUR
AU - Japs, Ewald
AU - Sonnenrein, Gerrit
AU - Krauter, Stefan
AU - Vrabec, Jadran
ID - 6655
JF - Solar Energy
TI - Experimental study of phase change materials for photovoltaic modules: Energy performance and economic yield for the EPEX spot market
VL - 140
ER -
TY - JOUR
AU - Dubberke, Frithjof H.
AU - Riepold, Markus
AU - Baumhögger, Elmar
AU - Vrabec, Jadran
ID - 13164
JF - Journal of Chemical & Engineering Data
SN - 0021-9568
TI - Speed of Sound of Oxygen in Supercritical States up to 500 K and 100 MPa
ER -
TY - THES
AU - Miroshnichenko, Svetlana
ID - 42137
SN - 9783843928281
TI - Molecular modeling and simulation for industrial applications
ER -
TY - JOUR
AU - Sonnenrein, G.
AU - Baumhögger, Elmar
AU - Elsner, A.
AU - Fieback, K.
AU - Morbach, A.
AU - Paul, A.
AU - Vrabec, J.
ID - 13165
JF - International Journal of Refrigeration
SN - 0140-7007
TI - Copolymer-bound phase change materials for household refrigerating appliances: experimental investigation of power consumption, temperature distribution and demand side management potential
ER -
TY - JOUR
AU - Dubberke, Frithjof H.
AU - Baumhögger, Elmar
AU - Vrabec, Jadran
ID - 13166
JF - Review of Scientific Instruments
SN - 0034-6748
TI - Burst design and signal processing for the speed of sound measurement of fluids with the pulse-echo technique
ER -
TY - JOUR
AB - This study presents the results of an experimental investigation of the influence of latent
thermal heat storage elements on the power consumption as well as the temperature distribution
of commercial household refrigerators.Two evaporator types and a standard wireand-
tube condenser are equipped with copolymer-bound phase change materials (PCM) and
the performance is determined under standard conditions. The results show that refrigerating
appliances equipped with PCM can be optimized through modifications of the control
strategy to achieve different targets: (a) Power consumption can be significantly reduced
by increasing the evaporator and decreasing the condenser temperature. (b) Temperature
fluctuations in the refrigerator’s fresh-food compartment during the cooling cycle can be
reduced from 4 °C to 0.5 °C. (c) The cooling cycle duration can be tripled without compromising
the fresh-food compartment conditions. The latter may help to meet the growing
demand for balancing power consumption to stabilize the power grid, e.g. if the share of
highly fluctuating, sustainable energy supply is large.
AU - Sonnenrein, Gerrit
AU - Baumhögger, Elmar
AU - Elsner, Andreas
AU - Fieback, K.
AU - Morbach, A.
AU - Paul, Andreas
AU - Vrabec, J.
ID - 21516
JF - International Journal of Refrigeration
SN - 0140-7007
TI - Copolymer-bound phase change materials for household refrigerating appliances: experimental investigation of power consumption, temperature distribution and demand side management potential
VL - 60
ER -
TY - CONF
AB - In light of an increasing awareness of environmental challenges, extensive research is underway to develop new light-weight materials. A problem arising with these materials is their increased response to vibration. This can be solved using a new composite material that contains embedded hollow spheres that are partially filled with particles. Progress on the adaptation of molecular dynamics towards a particle-based numerical simulation of this material is reported. This includes the treatment of specific boundary conditions and the adaption of the force computation. First results are presented that showcase the damping properties of such particle-filled spheres in a bouncing experiment.
AU - Steinle, Tobias
AU - Vrabec, Jadran
AU - Walther, Andrea
ED - Bock, Hans Georg
ED - Hoang, Xuan Phu
ED - Rannacher, Rolf
ED - Schlöder, Johannes P.
ID - 1781
SN - 978-3-319-09063-4
T2 - Proc. Modeling, Simulation and Optimization of Complex Processes (HPSC)
TI - Numerical Simulation of the Damping Behavior of Particle-Filled Hollow Spheres
ER -
TY - JOUR
AU - Sonnenrein, G.
AU - Elsner, A.
AU - Baumhögger, Elmar
AU - Morbach, A.
AU - Fieback, K.
AU - Vrabec, J.
ID - 13167
JF - International Journal of Refrigeration
SN - 0140-7007
TI - Reducing the power consumption of household refrigerators through the integration of latent heat storage elements in wire-and-tube condensers
ER -
TY - JOUR
AU - Dubberke, Frithjof H.
AU - Rasche, David B.
AU - Baumhögger, Elmar
AU - Vrabec, Jadran
ID - 13168
JF - Review of Scientific Instruments
SN - 0034-6748
TI - Apparatus for the measurement of the speed of sound of ammonia up to high temperatures and pressures
ER -
TY - JOUR
AU - Gorenflo, Dieter
AU - Baumhögger, Elmar
AU - Herres, Gerhard
AU - Kotthoff, Stephan
ID - 13169
JF - International Journal of Refrigeration
SN - 0140-7007
TI - Prediction methods for pool boiling heat transfer: A state-of-the-art review
ER -
TY - THES
AU - Kotthoff, Stephan
ID - 42126
SN - 9783932715877
TI - Zum Einfluss von Fluid- und Heizflächeneigenschaften auf Wärmeübergang und Blasenbildung beim Sieden
ER -
TY - THES
AU - Windmann, Thorsten
ID - 42135
TI - Vapor-liquid equilibrium properties from molecular simulation and experiment
ER -
TY - CONF
AU - Elsner, Andreas
AU - Müller, Michael
AU - Paul, Andreas
AU - Vrabec, Jadran
ID - 21517
TI - Zunahme des Stromverbrauchs von Haushaltskältegeräten durch Alterung
ER -
TY - JOUR
AU - Gorenflo, Dieter
AU - Baumhögger, Elmar
AU - Windmann, Thorsten
AU - Herres, Gerhard
ID - 13170
JF - International Journal of Refrigeration
SN - 0140-7007
TI - Nucleate pool boiling, film boiling and single-phase free convection at pressures up to the critical state. Part II: Circumferential variation of the wall superheat for a horizontal 25mm copper cylinder
ER -
TY - JOUR
AU - Gorenflo, Dieter
AU - Baumhögger, Elmar
AU - Windmann, Thorsten
AU - Herres, Gerhard
ID - 13171
JF - International Journal of Refrigeration
SN - 0140-7007
TI - Nucleate pool boiling, film boiling and single-phase free convection at pressures up to the critical state. Part I: Integral heat transfer for horizontal copper cylinders
ER -
TY - JOUR
AU - Gedanitz, Holger
AU - Dávila, María J.
AU - Baumhögger, Elmar
AU - Span, Roland
ID - 13172
JF - The Journal of Chemical Thermodynamics
SN - 0021-9614
TI - An apparatus for the determination of speeds of sound in fluids
ER -
TY - CONF
AU - Span, R.
AU - Gerber, M.
AU - Buljina, I.
AU - Baumhögger, Elmar
ID - 13173
SN - 1567002250
T2 - Boiling
TI - POOL BOILING IN HIGHLY VISCOUS MIXTURES - DESIGN OF A NEW APPARATUS AND RESULTS OF PRETESTS
ER -
TY - JOUR
AU - Luke, Andrea
AU - Baumhögger, Elmar
AU - Scheunemann, P.
ID - 13174
JF - Multiphase Science and Technology
SN - 0276-1459
TI - 3-DIMENSIONAL DESCRIPTION OF THE MICROSTRUCTURE OF HEATED SURFACES IN NUCLEATE POOL BOILING
ER -