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Krijgsman, Floris (author)Supercritical CO<sub>2</sub> (SCO<sub>2</sub>) is a promising alternative to traditional working fluids in heat pumps and power cycles due to its high density, thermal efficiency, and stability. These properties allow for the design of more compact and efficient equipment. However, accurately modeling supercritical heat transfer, especially near...master thesis 2024
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Rademaker, Siebrand (author)A new simulation tool has been developed to provide insights into the refueling process of hydrogen. The tool is based on existing models, including a 0D gas model and a 1D wall model, which have been refined to assist companies like Future Proof Shipping, which rely on compressed hydrogen tanks. Although the model is still subject to changes...master thesis 2024
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Singh, Ankit (author)Amidst the rise in fossil fuel consumption and the global energy crisis, there is a growing demand for clean, environmentally friendly, and sustainable energy solutions in industrial processes. One promising approach is to substitute conventional working fluids in power cycles with supercritical fluids. Over recent decades, substantial research...master thesis 2023
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Nanda, Rahul (author)Gasketed Plate Heat Exchangers (GPHEs) are a sub-class of heat exchangers that enable heat transfer between 2 fluids via metal plates. A common problem encountered in all heat exchangers is fouling. Fouling can be described as the deposition and accumulation of unwanted materials such as scale, algae, suspended solids and insoluble salts on a...master thesis 2023
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Vroom, Anika (author)This thesis explores the application of Distributed Temperature Sensing (DTS) technology to observe temperature gradients and turbulent eddies within and above a forest vegetation layer. Atmospheric temperature gradients tie directly to heat transfer, a primary mode of which are turbulent eddies. The goal in studying these elements is to enhance...master thesis 2023
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Bulstra, Kasper (author)The main problem in density-based two-fluid optimization is the fact that the two fluids often mix in optimal designs. Therefore, state-of-the-art two-fluid heat exchanger optimization includes non-mixing constraints. However, the current non-mixing constraints can only impose a constant wall-thickness between the two fluids. Depending on the...master thesis 2023
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SHARMA, AKSHRA (author)This thesis aims to investigate the effects of contact pressure and type of deformations on the thermal contact conductance(h’) for dry metal-metal contacts. Also, an attempt is made to develope a thermal contact conductance estimation model for the same. The materials used in this thesis are metals (aluminium and tin). Several experiments are...master thesis 2023
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QIU, Haodong (author)Hybrid structures consisting of FRP(fiber reinforce polymer) composite decks<br/>connected to a steel girder superstructure are gaining more attention by combining the stiffness of steel members with good fatigue endurance and high strength to weight ratio of FRP. However, when composite material FRP is exposed to elevated temperature,...master thesis 2023
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Heegstra, Sjoerd (author)Interest in biogas has increased due to natural gas shortages and the energy transition. Most digesters in the EU have internal heating for process stability. Unheated reactors could potentially lower costs, but have decreased kinetics due to low operational temperatures, especially in winter. This raises the question how seasonal temperature...master thesis 2022
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DIMOU, KYPRIANOS (author)Nowadays, climate change and global warming phenomena are becoming more and more serious issues. In order to sustain the enormous worldwide energy demand, society consumes a high amount of fuel, resulting into the steep increase of the level of CO\textsubscript{2} in the environment. Therefore, the massive greenhouse gases emissions in the...master thesis 2022
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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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Beitler, Jari (author)The Nuclear Research and consultancy Group (NRG) performs CFD simulations to improve the safety of nuclear installations and conducts research leading to new computational methods. One of the problems encountered in nuclear installations is that vital parts of the reactor, such as the fuel rod bundle, corrode over time. Corrosion leads to...master thesis 2022
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Mulder, Bas (author)With variable renewable energy on the rise, large-scale energy storage is needed to assure grid stability. Thermal energy storage (TES) is a new player in the large-scale energy storage landscape, but might prove a cheap, safe and reliable option, with low permitting barriers. TES is not geographically limited, generally compact and has a low...master thesis 2022
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kleyn Winkel, Lars (author)By placing multiple Peltier elements in a linear arrangement while two water flows run past the elements, a temperature increase can be realised in one flow while the other flow is cooled down. In this study the heating of domestic hot water with Peltier elements as solid state heat pumps, and a heating network was investigated. A numerical...master thesis 2022
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Daugulis, Edgars (author)An accurate estimation of gas turbine nozzle guide vane metal temperature locally on its surface is crucial for predicting vane lifetime. The stagnation region at the vane leading edge is, typically, exposed to the highest thermal load, thus, the showerhead configuration of film cooling is often applied on the leading edge. Widely used lean-...master thesis 2022
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Quattrucci, Giacomo (author)The optimization of heat transfer in turbulent upward pipe flows is a very common problem in engineering, due to the wide range of applications. However, this set-up is usually categorised as mixed convection flow, which means that gravity plays an important role. Sometimes, it might lead to heat transfer deterioration. This research will...master thesis 2022
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van den Hoed, wouter (author)During the last years the demand for vegetarian products has increased. A subgroup of these vegetarian products consists of meat analogs, which are products that resemble meat in its functionality and are prepared in a similar fashion. One of the companies producing these meat analogs is Rival Foods. Rival Foods has been working on a production...master thesis 2022
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Dimitriou, Neofytos (author)One of the biggest threats that humanity is currently facing is the climate change. The amount of greenhouse gases emissions and specifically the amount of CO2 in the atmosphere has increased and is projected to increase even more in the next years. One possible solution is the use of supercritical CO2 as an alternative working fluid in power...master thesis 2021
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Ajroemjan, Wahhe (author)The packaging of a microchip affects its size, performance and cost. With advanced packaging, more efficient and smaller microchips can be produced. For this, advanced packaging stepper systems are used, which are lithography machines with a highly optimized projection lens system, that use a powerful light source. The projection lens system for...master thesis 2021
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Wang, Siyuan (author)Drinking water temperature is an essential parameter for water quality related to the physical, chemical and biological processes in water. However, in many countries, the drinking water temperature has not been taken seriously and was excluded from water quality standards. For example, in the Netherlands, the temperature of drinking water...master thesis 2021