Searched for: subject%3A%22boiling%22
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Swart, Mik (author)
Climate change is a pressing issue. Hydrogen aircraft are an excellent alternative to current kerosene aircraft, and appear to be the most viable long-term solution for net-zero flight. One of the main challenges for hydrogen aircraft is to sustain a low boil-off rate. This research explores the solution of active cooling of the LH2 mixture in...
master thesis 2024
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McDonald, Tom (author), Tsay, Calvin (author), Schweidtmann, A.M. (author), Yorke-Smith, N. (author)
ReLU neural networks have been modelled as constraints in mixed integer linear programming (MILP), enabling surrogate-based optimisation in various domains and efficient solution of machine learning certification problems. However, previous works are mostly limited to MLPs. Graph neural networks (GNNs) can learn from non-euclidean data...
journal article 2024
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El Mellas, I. (author), Samkhaniani, N. (author), Falsetti, C. (author), Stroh, A. (author), Icardi, M. (author), Magnini, M. (author)
Micro-pin-fin evaporators are a promising alternative to multi-microchannel heat sinks for two-phase cooling of high power-density devices. Within pin-fin evaporators, the refrigerant flows through arrays of obstacles in cross-flow and is not restricted by the walls of a channel. The dynamics of bubbles generated upon flow boiling and the...
journal article 2024
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Tregnago, Chiara Lucia (author)
Recent advancements in the field of nanotechnology have proven to offer viable alternatives for energy production, transport, and storage. As far as thermal energy is concerned, nanofluids have emerged as a novel method to enhance heat transfer. Indeed, nanofluids exhibit superior thermal capabilities, which may be able to meet the requirement...
master thesis 2022
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Kalikatzarakis, Miltiadis (author), Theotokatos, Gerasimos (author), Coraddu, A. (author), Sayan, Paul (author), Wong, Seng Yew (author)
The immense pressure to decarbonise the maritime industry has led to the Liquefied Natural Gas (LNG) uptake as a marine fuel and the LNG fuelled ships design. As LNG is stored in cryogenic conditions, the heat ingress from the ambient causes the boil-off gas (BOG) production, which, if not controlled, results in the tank overpressure with...
journal article 2022
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Hoogendoorn, Matthijs (author)
This thesis describes the development of a new electronic mixing valve for<br/>Quooker B.V., manufacturer of instant boiling water dispensing systems. A<br/>mixing valve is able to control the blending of different liquids to ensure a<br/>predetermined outcome. By integrating electronics into a mixing valve and<br/>turning it into a mechanic...
master thesis 2020
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Moghadasi, Hesam (author), Malekian, Navid (author), Saffari, Hamid (author), Mirza Gheytaghi, Amir (author), Zhang, Kouchi (author)
Pool boiling is an effective heat transfer process in a wide range of applications related to energy conversion, including power generation, solar collectors, cooling systems, refrigeration and air conditioning. By considering the broad range of applications, any improvement in higher heat-removal yield can ameliorate the ultimate heat usage...
review 2020
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de Groot, Marie (author)
A strategy for Quooker to change its business model from offering a product to offering an outcome.
master thesis 2019
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Hagedooren, Hugo (author)
In deep polders in the Netherlands the dominant mechanism of salinization is via intense seepage through boils. These are local connections between the surface water and a deep saline aquifer. The study area of this research is the Lissertocht. This catchment, which is located inside the Haarlemmermeerpolder, contains a lot of boils that can...
master thesis 2018
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Krabbenborg, Stijn (author)
Currently, Quooker is Europe’s market leader in boiling water taps. Although initially Quooker taps were focused on providing boiling tap water in standard households, nowadays an increasing share of Quooker B.V.’s turnover is represented by taps being sold in professional markets from which the office and food &amp; beverages (F&amp;B) markets...
master thesis 2018
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García Martínez, M.F. (author), Marchi, M. (author), Tonni, L. (author), Gottardi, G. (author), Bezuijen, A. (author), Rosso, A. (author)
The reliability of river embankments is essential for flood risk management. The Po River, which flows through the North of Italy, is safeguarded over half of its length by major river embankments. Performance assessment of such water-retaining structures has become a major concern following some significant flood events in the past. Among the...
conference paper 2017
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Aielli, S. (author), Pavan, S. (author), Rosso, A. (author), Parodi, S. (author)
The river Po is the main river of Italy, and crosses the entire North Italy from the Western Alps to the Adriatic sea. Its middle-lower course is characterized by an imposing levees’ system, which origins go back to the XVI Century, and which size has been continuously increased until nowadays. As it often occurs, when dealing with earth dykes,...
conference paper 2017
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Hilgersom, K.P. (author)
This thesis explores a new measuring approach to quantify the seepage flux from boils. Boils are preferential groundwater seeps and are a consequence of the groundwater flow that works its way through the soil matrix by creating vents of higher conductive material. In the Netherlands, boils often occur in deep polders (reclaimed lakes situated 4...
doctoral thesis 2017
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Hilgersom, K.P. (author), van de Giesen, N.C. (author), de Louw, PGB (author), Zijlema, Marcel (author)
Distributed temperature sensing has proven a useful technique for geoscientists to obtain spatially distributed temperature data. When studies require high-resolution temperature data in three spatial dimensions, current practices to enhance the spatial resolution do not suffice. For example, double-diffusive phenomena induce sharp and small...
journal article 2016
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Van Beek, V.M. (author)
Backward erosion piping is an internal erosion mechanism during which shallow pipes are formed in the direction opposite to the flow underneath water-retaining structures as a result of the gradual removal of sandy material by the action of water. It is an important failure mechanism in both dikes and dams where sandy layers are covered by a...
doctoral thesis 2015
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De Visser, M.M. (author), Kanning, W. (author), Koopmans, R. (author), Niemeijer, J. (author)
Research to the failure mechanism piping (internal, backward erosion) in the Netherlands shows that the dikes require costly berms to meet the required safety standards. According to the Sellmeijer piping-formula, the d70 (70%-quantile of the grain size distribution by weight) is an important parameter in the resistance against piping. Therefore...
conference paper 2015
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Rops, C.M. (author)
New production techniques, which became available since the 1980’s, allowed the mass production of small sized fluidic systems. Reducing the size of a technical system alters the performance due to scaling effects. Physical phenomena which operate on volumes, such as gravity and inertia, become less important with respect to physical phenomena...
doctoral thesis 2009
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Ferreira, R.A. (author)
Delft University of Technology (TU-Delft) is investigating the use of resistance heaters as a means to increase the specific impulse of cold nitrogen gas thrusters. There are currently envisaged for use on micro- and nano-sized spacecraft. To this effect, TU-Delft developed the Delft University Resistojet (DUR) thruster with the purpose to heat...
master thesis 2008
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Marcel, C.P. (author)
The stability of natural circulation boiling water reactors is investigated with a strong emphasis on experiments. Two different facilities are used for such a task: the GENESIS facility (to which a void reactivity feedback system is artificially added) and the CIRCUS facility. In addition, numerical codes are also used in the investigation.
doctoral thesis 2007
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Mengmeng, X. (author)
This first chapter will give an introduction to what is a BLEVE, Boiling Liquid Expanding Vapor Explosion, and its hazards particularly in relation to tunnel safety. It will be shown that several definitions of a BLEVE can be given, depending on the aspect put in focus. In particular distinction can be made between two groups of references,...
report 2007
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