Searched for: subject%3A%22HTFD%255C%2B%255C-%255C%2BHeat%255C%2BTransfer%255C%2B%2526%255C%2BFluid%255C%2BDynamics%22
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van Beek, P.J.G. (author), Pijpers, R.J.M. (author), Macdonald, K. (author), Maljaars, J. (author), Lunde, K. (author), Korst, H.J.C. (author), Hansen, F. (author)
This paper describes a novel and advanced tailor-made fatigue assessment method whereby acceptable vibration levels are based on maximum acceptable stress ranges for individual side branches. The acceptable stress ranges for each critical welded connection are based on a fracture mechanics analysis of fatigue crack growth. This method also...
conference paper 2014
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González Díez, N. (author), Smeulers, J.P.M. (author), Tapinassi, L. (author), Scotti del Greco, A. (author), Toni, L. (author)
A testing campaign performed on a centrifugal compressor test-loop showed that multiple areas of stable operation existed that were not expected. It was shown during the tests that after a first region of instability at low flow rates, a second stable region would appear at even lower flow rates. Dynamic simulations based on a modified reitzer’s...
conference paper 2014
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van Koert, L. (author)
TNO heeft een behoorlijke staat van dienst als het gaat om kennis over drukpulsaties in leidingsystemen. Begin jaren zeventig schreven zij letterlijk geschiedenis, toen zij samen met industriële partners de PULSIM analoge computer ontwikkelden en gingen gebruiken voor het onderzoek naar pulsaties veroorzaakt door grote zuigercompressoren....
article 2014
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Shoeibi Omrani, P. (author), Veltin, J. (author), Turkenburg, D.H. (author)
This paper discusses the effect of drag reducing polymers on the Tubing Performance Curve (TPC) of vertical air-water flows at near atmospheric conditions. The effect of polymer concentration, liquid and gas flow rates on the pressure drop curve (Tubing Performance Curve) was investigated experimentally. The results showed that polymers tend to...
conference paper 2014
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Swamy, M. (author), van Lier, L.J. (author), Smeulers, J.P.M. (author)
In one of the screw compressor system, designed silencer was not optimal. A great challenge was the large variation in operating conditions, especially the variation of the molecular weight of the gas. There was need to optimize the silencer. This paper describes the acoustic modelling tools to optimize the acoustic performance of the silencer....
conference paper 2014
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Hetland, J. (author), Barnett, J. (author), Read, A. (author), Zapatero, J. (author), Veltin, J. (author)
This paper addresses technical and operational aspects pertaining to the transport of CO2. It deals with lessons learnt from the development of three large CCS demonstration projects: The UK-based Don Valley project, the Dutch ROAD project, and the Spanish Compostilla project. These projects were all selected by the European Commission in 2009...
conference paper 2014
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Brasjen, B.J. (author), Veltin, J. (author), Hansen, J.H. (author)
The present work focuses on experimental evidence of slug mitigation via various devices. The slug mitigation potential of a number of mixers was tested using a laboratory scale air/water setup to compare their effect on the incoming slugs just upstream of the separator inlet. Dedicated methods and key performance indicators were developed to...
conference paper 2014
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Jacobs, P. (author)
De Vereniging Leveranciers van Luchttechnische Apparaten (VLA) heeft samen met TNO een uniek meetprotocol ontwikkeld. Dit protocol geeft met behulp van optische deeltjes-tellers een schatting voor de jaargemiddelde fijnstofconcentratie in kantoorruimtes. Met de uitkomsten van zo'n meting kan worden afgewogen of filters en/of...
article 2014
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Cornelissen, H.J.M. (author), de Jong, P. (author), Bakhuys-Roozeboom, M.C. (author)
ln kantoorgebouwen komen regelmatig klachten voor met betrekking tot het binnenmilieu, Deze klachten zijn op te splitsen in comfortklachten en gezondheidsklachten. Veel geuitte comfortklachten zijn dat het te warm, te koud of te droog is, het tocht en het niet fris zijn van de binnenlucht.
article 2014
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Buijs, L.J. (author), Eijk, A. (author), van Hooft, L. (author)
This paper will present the root cause analysis and the solution of fatigue failures of the pump valves of three membrane pump systems installed on a chemical plant of Momentive in Pernis, the Netherlands. The membrane pumps were installed approximately 30 years ago. Each system has encountered fatigue failures of the membranes, valve plates and...
conference paper 2014
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Violato, D. (author), de Jong, A.T. (author), Golliard, J. (author)
This paper focuses on the scalability of broadband turbulent noise in internal pipe flows. It discusses a universal scaling approach for broadband turbulent noise that is based on surface acoustic power modeled by ANSYS Fluent. This investigation proposes a strategy for amplitude scaling at frequencies above the onset frequency for non-planar...
conference paper 2014
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Hou, Q. (author), Tijsseling, A.S. (author), Laanearu, J. (author), Annus, I. (author), Koppel, T. (author), Bergant, A. (author), Vučković, S. (author), Anderson, A. (author), van 't Westende, J.M.C. (author)
This study presents the results from detailed experiments of the two-phase pressurized flow behavior during the rapid filling of a large-scale pipeline. The physical scale of this experiment is close to the practical situation in many industrial plants. Pressure transducers, water-level meters, thermometers, void fraction meters, and flow meters...
article 2014
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Jacobs, P. (author)
De aanpak van het binnenklimaat bij scholen beperkt zich meestal tot ventilatie en temperatuurbeheersing. Fijnstof krijgt - onterecht - weinig aandacht. De concentratie PM10 fijnstof is juist in scholen bijzonder hoog, veel hoger zelfs dan buiten. De ramen open zetten voor'frisse lucht' is niet altijd verstandig. Met de frisse lucht komen...
article 2014
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Koene, F.G.H. (author), Bakker, L.G. (author), Lanceta, D. (author), Narmsara, S. (author)
In the setting of this paper, a building is represented by a simple model consisting of two thermal masses. Generic values were obtained for two unknown parameters in the model, capable of representing an office building, a single family dwelling and a multifamily dwelling, at three levels of thermal insulation. The model allows the aggregation...
conference paper 2014
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van Westering, W.H.P. (author), Hellendoorn, H. (author), Brasjen, B.J. (author), van der Linden, R.J.P. (author)
A gas network model has been constructed based on the steady-state Weymouth equation. A fast and robust solution algorithm is proposed and subsequently used to calculate all flows and pressures in a gas network with over 40,000 pipes. The obtained result is mathematically accurate within 0.1% and has been obtained within 0.2 seconds. Using basic...
conference paper 2014
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Jacobs, P. (author), Voogt, M.H. (author)
TNO heeft begin dit jaar samen met de VLA een meetprotocol voor de bepaling van fijnstof (PM2.5) ontwikkeld. Het protocol beschrijft hoe met optische deeltjestellers op basis van een week meten een schatting voor de jaargemiddelde fijnstofconcentratie in kantoorruimten kan worden gemaakt. Met de uitkomsten van zo'n meting is de afweging...
article 2014
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Nennie, E.D. (author), de Boer, J.P. (author), Schiferli, W. (author)
Various Dutch operators have identified a need for increased application of deliquification measures in their North Sea wells. To help meet this need a Joint Industry Project (JIP) was set up to identify knowledge and experience gained in the United States on gas well deliquification and transfer this to European wells. In the first phase of the...
conference paper 2014
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Jacobs, P. (author), Phaff, J.C. (author), Voogt, M.H. (author)
An intervention study with a decentral electrostatic filter has been carried out in a nursery. The field study shows that it is possible to reach a reduction up to 80% of ultra-fine (<0.1 μm) and up to 68% for the PM1 and PM2,5-PM1 fractions at a relatively low energy consumption. These particle fractions were mostly determined by the outdoor...
conference paper 2014
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Knoll, B. (author)
Als ie een koude of vochtige plek in je kas vindt met een duideliike oorzaak is de oplossing gemakkelijk. Maar in moderne kassen doen zich regelmatig onverklaarbare forse temperatuur- en vochtigheidsverschillen voor. Oorzaak zijn autonome luchtbewegingen. Onderzoekers en analysten zijn bezig met een handzame lijst aanbevelingen om dit soort...
article 2014
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van Bokhorst, E. (author), Twerda, A. (author)
The work presented contributes to the LNG supply chain by the development of a validated calculation model for corrugated flexible hoses or pipes developed for LNG Transfer. The model builds upon experience gained by TNO Technical Sciences (Fluid Dynamics) in a large number of flow tests carried out on hoses in a large range of diameters from 4...
conference paper 2014
Searched for: subject%3A%22HTFD%255C%2B%255C-%255C%2BHeat%255C%2BTransfer%255C%2B%2526%255C%2BFluid%255C%2BDynamics%22
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