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Influence of fully miscible lubrication oil on flow boiling of CO? inside horizontal evaporator tubes

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ISBN: 9783731507277 Year: Pages: XVI, 423 p. DOI: 10.5445/KSP/1000074487 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Chemical Engineering
Added to DOAB on : 2019-07-30 20:02:02
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Flow boiling heat transfer, pressure drop and flow pattern of CO?-POE oil mixtures were experimentally investigated in smooth and micro-fin tubes. The POE oil used features full miscibility in the range of operation investigated. The experimental data was evaluated based on mixture properties, used to evaluate and improve established predictive methods. The knowledge obtained contributes to understanding the influence of oil, which is essential for achieving an efficient evaporator design.

Beitrag zur Effizienzsteigerung mobiler Arbeitsmaschinen: Entwicklung einer elektrohydraulischen Bedarfsstromsteuerung mit aufgeprägtem Volumenstrom

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Book Series: Karlsruher Schriftenreihe Fahrzeugsystemtechnik / Institut für Fahrzeugsystemtechnik ISSN: 18696058 ISBN: 9783731503392 Year: Volume: 32 Pages: 168 p. DOI: 10.5445/KSP/1000045508 Language: GERMAN
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-30 20:01:58
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The drive line of the working equipment of mobile machines is mainly composed of fluid power systems. Electro-hydraulic components facilitate the development of innovative Flow-on-Demand hydraulics. In these systems the oil flow of the pump is derived from the consumer requests and directly set in an open-loop control. Principle related power dissipation is reduced. Additionally, faster system response improves machine operability and ease of use.

Simulation von Fahrspielen und Energieflüssen in Nahverkehrssystemen

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Book Series: Karlsruher Schriftenreihe Fahrzeugsystemtechnik / Institut für Fahrzeugsystemtechnik ISSN: 18696058 ISBN: 9783731507406 Year: Volume: 66 Pages: XXX, 323 p. DOI: 10.5445/KSP/1000077162 Language: GERMAN
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-28 18:37:01
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For ecological und economic reasons, special attention is paid to the energy balance of rail-bound, local, direct current-based transport systems. With the tram and urban railway network of Karlsruhe being used as an example, 16 simulation scenarios with different measures for energy optimization are analysed in a coupled computation of driving cycles and energy flows.

High accuracy determination of skin friction differences in an air channel flow based on pressure drop measurements

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Book Series: Schriftenreihe des Instituts für Strömungsmechanik, Karlsruher Institut für Technologie ISSN: 21998868 ISBN: 9783731505020 Year: Volume: 2 Pages: VIII, 222 p. DOI: 10.5445/KSP/1000053260 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Technology (General)
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The present work delivers a versatile, accurate and reliable wind tunnel facility that is particularly developed to test different flow control techniques for drag reduction in precisely adjustable test conditions. Skin friction changes of 0.4% are resolved, which is comparable to the most accurate reported studies in liquids. this high accuracy is verified through a comprehensive uncertainty analysis. Subsequently, various passive and active flow control strategies are investigated.

Grundlegende Aspekte des 2K-Metallpulverspritzgießens

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Book Series: Schriftenreihe des Instituts für Angewandte Materialien, Karlsruher Institut für Technologie ISSN: 21929963 ISBN: 9783731502173 Year: Volume: 36 Pages: III, 138 p. DOI: 10.5445/KSP/1000040997 Language: GERMAN
Publisher: KIT Scientific Publishing
Subject: Technology (General)
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An important requirement for the combination of two materials in order to get a low stress and low warpage, crack-free composite component is a timely synchronized sintering behavior of both components. The aim of this work was to analyze the effect of the particle size distribution on the sintering behavior and the resulting consequences of the particle size change for the flow properties during injection molding.

Modellunterstützte Beurteilung der Verkehrsqualität auf Netzabschnitten von Bundesautobahnen

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Book Series: Schriftenreihe des Instituts für Verkehrswesen, Karlsruher Institut für Technologie ISSN: 03415503 ISBN: 9783731508687 Year: Volume: 73 Pages: XVII, 173 p. DOI: 10.5445/KSP/1000087900 Language: GERMAN
Publisher: KIT Scientific Publishing
Subject: General and Civil Engineering
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An efficient highway capacity design is becoming an increasingly important topic, thanks to recurring congestions and unreliable travel times in the German highway network. This work provides a new methodology for the analysis of oversaturated freeway facilities. A Cell Transmission Model was used as an underlying traffic flow model for modeling oversaturated freeway facilities and tailor-fitted to represent the HBS manual faithfully.

Strategies to reduce friction losses and their implications for the energy efficient design of internal flow domains

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Book Series: Schriftenreihe des Instituts für Strömungsmechanik, Karlsruher Institut für Technologie ISSN: 21998868 ISBN: 9783731502913 Year: Volume: 1 Pages: VII, 167 p. DOI: 10.5445/KSP/1000043770 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Technology (General)
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This work aims at developing a strategy how the energy which has to be applied to transport incompressible and Newtonian fluids through straight ducts can be reduced. Based on the physical properties of laminar and turbulent flow, models are derived which theoretically lead to the reduction of the dissipated energy. The possibility to implement the proposed state due to appropriate design aspects in the cross section shape of the duct is investigated based on numerical simulations of the flow

Numerical Modeling of Stagnation Flows over Porous Catalytic Surfaces

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ISBN: 9783731504344 Year: Pages: XII, 204 p. DOI: 10.5445/KSP/1000049629 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-30 20:02:00
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In this book, stagnation flows on a catalytic porous plate is modeled one-dimensionally coupled with multi-step surface reaction mechanisms and molecular transport (diffusion and conduction) in the flow field and in the porous catalyst. Internal and external mass transfer limitations as well as possible reaction routes in the catalyst are investigated for CO oxidation, WGS reaction, partial and steam reforming of methane over Rh/Al?O?.

A Decentralized Control Strategy for High Density Material Flow Systems with Automated Guided Vehicles

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Book Series: Wissenschaftliche Berichte des Instituts für Fördertechnik und Logistiksysteme des Karlsruher Instituts für Technologie ISSN: 01712772 ISBN: 9783731503897 Year: Volume: 85 Pages: X, 160p. DOI: 10.5445/KSP/1000047227 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Technology (General)
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This work presents a universal decentralized control strategy for grid-based high-density material flow systems with automated guided vehicles and gives insights into the system behavior as well as the solution quality.

Entwicklung eines druckgetriebenen dynamischen Kolonnenmodells zur Erhöhung der Flexibilität von kryogenen Luftzerlegungsanlagen

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ISBN: 9783731507604 Year: Pages: VIII, 175 p. DOI: 10.5445/KSP/1000080378 Language: GERMAN
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-28 18:37:01
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Driven by market signals, energy consumers are motivated to adapt their grid load. Due to their cryogenic storage capacity, air separation units can efficiently be used for load shifting. Such an operation leads to new challenges for plant operation and control. The developed pressure-driven dynamic column model is used to investigate load-flexible operation.

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