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Tenpierik, M.J. (author), Wattez, Y.C.M. (author), Turrin, M. (author), Cosmatu, T. (author), Tsafou, S.E. (author)
Phase change materials (PCMs) are materials that can store large amounts of heat during their phase transition from solid to liquid without a significant increase in temperature. While going from liquid to solid this heat is again released. As such, these materials can play an important role in future energy-efficient buildings. If applied in...
journal article 2019
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Luna-Triguero, Azahara (author), Sławek, A. (author), Huinink, HP (author), Vlugt, T.J.H. (author), Poursaeidesfahani, A. (author), Vicent-Luna, JM (author), Calero, S (author)
According to the European Commission, in 2016 the residential sector represented 25.4% of the final energy consumption. Heating and cooling in EU households account for 69.1% of the total energy consumption. The fraction of 84% for heating and cooling is still generated from fossil fuels, and only 16% is generated from renewable energy. To...
journal article 2019
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Valori, V. (author)
Fluids above the critical point are widely used in industry. Chemical, pharmaceutical, food industry and energy production are some examples. In the energy production sector they are mainly used as cooling fluids, because they allow to increase the thermal efficiency of the power plants. However, the fundamentals of their heat transfer behavior...
doctoral thesis 2018
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Elias Maxil, J.A. (author), Hofman, J.A.M.H. (author), Wols, B.A. (author), Clemens, F.H.L.R. (author), van der Hoek, J.P. (author), Rietveld, L.C. (author)
This paper presents a model (inspired by another model) to calculate water temperature in free-surface flow with two main innovations: the convective heat transfer occurs only at the wetted perimeter of pipes, and the model was integrated to commercial software used for hydraulic calculations in drainage systems. Given these innovations, we...
journal article 2017
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Shi, L. (author)
Nowadays more and more large composites are used to replace the traditional metallic structural materials in the industries. However, for manufacturing the thick thermoset composites, the size not only influences the mechanical properties in the completed products, but also the core temperature overshoot generated during the curing reaction....
doctoral thesis 2016
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Satyavada, H. (author), Baldi, S. (author)
Condensing boilers use waste heat from flue gases to pre-heat cold water entering the boiler. Flue gases are condensed into liquid form, thus recovering their latent heat of vaporization, which results in as much as 10%–12% increase in efficiency. Modeling these heat transfer phenomena is crucial to control this equipment. Despite the many...
journal article 2016
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Skandali, M. (author), Jansen, K.M.B. (author), Koussios, S. (author), Sinke, J. (author), Benedictus, R. (author)
The purpose of this study is to simulate the two-dimensional, transient and continuous heat transfer during the thermoset Automated Tape Laying (ATL) process. The heat transfer analysis is coupled with a cure kinetics model of the thermoset prepreg tapes used for the process. Unlike most studies, the process is modelled in a Lagrangian framework...
conference paper 2015
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Reurings, C. (author), Koussios, S. (author), Bergsma, O.K. (author), Vergote, K. (author)
In order to compete with steel, a fibre-reinforced composite exhaust wall with a general-purpose resin system requires an effective but lightweight insulation layer. However a lack of experimental methods for heat transfer from turbulent gas flow to pipe walls lined with a porous insulation layer was discovered in literature. Such a test method...
conference paper 2015
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Boersma, B.J. (author), Pecnik, R. (author), Nemati, H. (author), Peeters, J.W.R. (author)
In this paper we discuss the effect of sharp property variations on the turbulent heat transfer in fluids close the critical point. The governing equations for this flow regime are discussed, a short description of the numerical tools that have been developed to study these flows is given. Finally, some results for supercritical heat transfer in...
journal article 2015
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Faivre, R.D. (author)
The parameterization of heat transfer by remote sensing, and based on SEBS scheme for turbulent heat fluxes retrieval, already proved to be very convenient for estimating evapotranspiration (ET) over homogeneous land surfaces. However, the use of such a method over heterogeneous landscapes (e.g. semi-arid regions or agricultural land) becomes...
doctoral thesis 2014
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Ambesi, D. (author), Kleijn, C.R. (author), Den Hartog, E.A. (author), Bouma, R.H.B. (author), Brasser, P. (author)
In chemical, biological, radiological, and nuclear protective clothing, a layer of activated carbon material in between two textile layers provides protection against hazardous gases. A cylinder in cross flow, sheathed by such material, is generally used to experimentally test the garment properties. This is, however, complicated and predictive...
journal article 2013
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Westig, M.P. (author), Selig, S. (author), Jacobs, K. (author), Klapwijk, T.M. (author), Honingh, C.E. (author)
In this paper, we demonstrate experimentally the implementation of a niobium-trilayer junction with an aluminum-oxide tunnel barrier, embedded in a high-gap superconducting niobium-titanium-nitride circuit. Previously reported heating by quasiparticle trapping is removed by inserting a normal metal layer of gold between the niobium junction and...
journal article 2013
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Kenjeres, S. (author)
Numerical simulations and analysis of flow and heat transfer of an electrically conducting fluid past magnetic obstacles are reported. We studied the channel flow configuration with electrically and thermally insulated horizontal walls containing a single or multiple (two or three) magnetic dipoles. Different values of the interactive parameter...
journal article 2012
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Caggiano, A. (author), Pepe, M. (author), Koenders, E.A.B. (author), Martinelli, E. (author), Etse, G.J. (author)
Heat production induced by the hydration reaction and the resulting temperature evolution in the early phases of setting and hardening processes are critical phenomena, often leading to premature cracking of concrete members. However, the interest for simulating such phenomena is also related to the fundamental relationships between the nature...
conference paper 2012
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Ugur, D. (author), Storm, A.J. (author), Verberk, R. (author), Brouwer, J.C. (author), Sloof, W.G. (author)
An isothermal sensor is developed to quantify the atomic hydrogen flux on a surface, which can be located at any distance from the molecular hydrogen cracking unit. This flux is determined from the measured heat effect due to recombination of atomic hydrogen at the sensor surface. The temperature of the sensor was kept constant at 350°C to keep...
journal article 2012
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Dwaikat, M.M.S. (author), Kodur, V.K.R. (author)
Steel structures in building are to be provided with external insulation to delay temperature rise and associated strength degradation when exposed to fire. However, due to delicateness and fragility of some insulation systems, damage might occur in these insulation systems during their service life, and such damage can lead to rapid rise in...
journal article 2012
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Moonen, P. (author), Sluys, L.J. (author), Carmeliet, J. (author)
A macroscopic framework to model heat transfer in materials and composites, subjected to physical degradation, is proposed. The framework employs the partition of unity concept and captures the change from conduction-dominated transfer in the initial continuum state to convection and radiation-dominated transfer in the damaged state. The...
journal article 2011
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Mihailovic, M. (author), Rops, C. (author), Creemer, J.F. (author), Sarro, P.M. (author)
A new design of micro-evaporators, with 45 channels (View the MathML source100?m deep) and diamond-shaped fins (View the MathML source40?m wide, View the MathML source160?m long, View the MathML source20?m separation), is fabricated by anodic bonding of silicon and glass wafers, in a five masks process. This new design improves stability of the...
journal article 2010
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Verdoold, J. (author)
This dissertation focuses on turbulent thermal convection, which occurs in a wide range of (geo)physical situations, like in the atmosphere, the oceans, the interior of stars or planets, and engineering applications, like metal casting or crystal growth processes. In this work, a special type of thermal convection, Rayleigh-Bénard convection, is...
doctoral thesis 2010
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Saeid, S. (author), Barends, F.B.J. (author)
One of the crucial topics in this century is sustainable energy. Since the sources of fossil fuels are limited and are going to be exhausted, there is a need to look for sustainable renewable energy. In this respect, the exploitation of geothermal energy from deep hot aquifers becomes opportune. Hence, insight is required in the heat balance of...
conference paper 2009
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