Searched for: department%3A%22Process%255C%2Band%255C%2BEnergy%22
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Cornel, W.A. (author), Westerweel, J. (author), Poelma, C. (author)
Abstract: A novel experimental imaging-based method is presented for the non-intrusive determination of shock wave characteristics (i.e. shock wave speed and magnitude, and shock-induced liquid velocity) in a bubbly flow solely from gas bubble velocities. Shock wave speeds are estimated by the relative motion between gas bubbles at two...
journal article 2023
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Xiao, Tian (author), Zhang, Qiaoling (author), Yang, Xiaohu (author), Hooman, K. (author), Li, Guodong (author)
It is indicated that the solder joint of the metal fibrous materials is a critical factor impacting the heat conduction. To reveal the mechanism by which solder joint sizes, solder joint skips, solder flux materials, and filling media affect the thermal conductivity of fibres, pore-scale numerical simulation is employed to study the thermal...
journal article 2023
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Sharma, S. (author), Balestra, Salvador R.G. (author), Baur, Richard (author), Agarwal, Umang (author), Zuidema, Erik (author), Rigutto, Marcello S. (author), Calero, Sofia (author), Vlugt, T.J.H. (author), Dubbeldam, David (author)
We present the RUPTURA code (https://github.com/iraspa/ruptura) as a free and open-source software package (MIT license) for (1) the simulation of gas adsorption breakthrough curves, (2) mixture prediction using methods like the Ideal Adsorption Solution Theory (IAST), segregated-IAST and explicit isotherm models, and (3) fitting of isotherm...
journal article 2023
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Calati, Michele (author), Righetti, Giulia (author), Zilio, Claudio (author), Hooman, K. (author), Mancin, Simone (author)
The transportation of perishable products is a crucial activity that must be carefully managed along the cold chain. The refrigerated transport aims at ensuring the suitable transportation conditions by maintaining the desired temperature level in the refrigerated compartment. Moreover, the carriage of perishable fresh foodstuffs calls for...
journal article 2023
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Wasik, Dominika O. (author), Martín-Calvo, Ana (author), Gutiérrez-Sevillano, Juan José (author), Dubbeldam, David (author), Vlugt, T.J.H. (author), Calero, Sofía (author)
Formic acid production from CO<sub>2</sub> allows the reduction of carbon dioxide emissions while synthesizing a product with a wide range of applications. CO<sub>2</sub> hydrogenation is challenging due to the cost of transition metal catalysts and the toxicity of the transition elements. In this work, the thermodynamic confinement effects...
journal article 2023
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Yang, Yueming (author), Wang, Xurong (author), Hooman, K. (author), Han, Kuihua (author), Xu, Jinliang (author), He, Suoying (author), Qi, Jianhui (author)
Recently, the supercritical carbon dioxide (SCO<sub>2</sub>) power cycle has become a hotspot in the field of energy-efficient utilization. The utilization of additives in the power cycle has been proven to be an effective way to improve the SCO<sub>2</sub> power cycle efficiency. As one of the core components of the system, the influence of...
journal article 2023
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Polat, H.M. (author), de Meyer, Frédérick (author), Houriez, Céline (author), Moultos, O. (author), Vlugt, T.J.H. (author)
We developed an open-source chemical reaction equilibrium solver in Python (CASpy, https://github.com/omoultosEthTuDelft/CASpy) to compute the concentration of species in any reactive liquid-phase absorption system. We derived an expression for a mole fraction-based equilibrium constant as a function of excess chemical potential, standard...
journal article 2023
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Zhang, Yuxuan (author), Zhai, Xiaoqiang (author), Zhang, Fengyuan (author), Zhang, Zhongbin (author), Hooman, K. (author), Zhang, Hai (author), Wang, Xiaolin (author)
Enhancing gas-liquid mass transfer is key to promote gas hydrate formation kinetics. Encapsulation of CO<sub>2</sub> hydrate is expected to dramatically increase gas-liquid contact to enhance mass transfer. However, gas hydrate encapsulation has never been proposed as the technical issues of gas permeation through capsule shells have never...
journal article 2023
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Oikonomidis, Silvestros (author), Ramdin, M. (author), Moultos, O. (author), Bos, Albert (author), Vlugt, T.J.H. (author), Rahbari, A. (author)
Due to the intermittency of renewable energy sources, alkaline water electrolyzers are typically operated at partial load compared to the nominal design value. It is well-known that gas crossover is dominant at low current densities leading to higher anodic hydrogen content and higher cathodic oxygen content in the separator tanks. High...
journal article 2023
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Ramdin, M. (author), Moultos, O. (author), van den Broeke, L.J.P. (author), Gonugunta, P. (author), Taheri, P. (author), Vlugt, T.J.H. (author)
Electrochemical reduction of carbon dioxide (CO<sub>2</sub>) to useful products is an emerging power-to-X concept, which aims to produce chemicals and fuels with renewable electricity instead of fossil fuels. Depending on the catalyst, a range of chemicals can be produced from CO<sub>2</sub> electrolysis at industrial-scale current densities,...
review 2023
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Opolot, Michael (author), Zhao, Chunrong (author), Keane, Partrick F. (author), Liu, Ming (author), Mancin, Simone (author), Bruno, Frank (author), Hooman, K. (author)
Thermal energy storage is increasingly needed in a sustainable world because of its potential of capturing waste heat and being incorporated in solar power plants. For power generation, in particular, as turbine technology advances, a demand for higher temperature thermal energy storage materials also grows. For this purpose, latent thermal...
journal article 2023
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Zhang, Qunli (author), Zhao, Wenqiang (author), Sun, Donghan (author), Meng, Xiangzhao (author), Hooman, K. (author), Yang, Xiaohu (author)
NO<sub>x</sub> emission reduction from gas boilers has become a key issue in improving air quality. Combustion air humidification technology is gradually being used to reduce NO<sub>x</sub> emissions. However, the NO<sub>x</sub> emission reduction effect of gas boilers at a higher combustion air humidity has been studied less. A flue gas with...
journal article 2023
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Guo, Junfei (author), Li, Ze (author), Wei, Pan (author), Li, Ling (author), Yang, Xiaohu (author), He, Ya Ling (author), Hooman, K. (author)
The integration of phase change materials (PCMs) and metal foam has been widely concerned recently. To decrease non-uniformity of uniform metal foam-PCMs, adaptive metal foam arrangement strategy with increasing porosity from inside to outside has attracted widespread attention. This work conducted a symmetric simulation model of vertical...
journal article 2023
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Khoshnood, Alireza (author), Maerefat, Mehdi (author), Imani, Gholamreza (author), Hooman, K. (author)
Exhaust gas recirculation (EGR) systems have been successfully employed to reduce the NOx emissions in diesel engines. However, the fouling problem in EGR coolers challenges their capability to comply with stringent environmental regulations. A few numerical simulations have considered the fouling growth in EGR coolers. Those studies modeled...
journal article 2023
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Nedumaran, Muthamil Selvan (author), Gnanasekaran, Nagarajan (author), Hooman, K. (author)
The present study compares a modified variable height fin heat sink with the conventional constant height fin heat sink. The two heat sinks are filled with an equal volume of PCM (n-eicosane) and a fin volume fraction of 8 %. The experiments are performed for constant loads and also different power surge conditions. The pulsed heat loads are...
journal article 2023
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Shikh Anuar, Fadhilah (author), Mustapha, Khairul Azhar (author), Sa'at, Fatimah Al Zahrah Mohd (author), Zini, Nurul Hilwa Mohd (author), Tokit, Ernie Mat (author), Narasimmanaidu, Satishwara Rao (author), Hooman, K. (author)
In this study, the microstructure of open-cell metal foam was generated and reconstructed, to produce a new generation of open-cell foam, which is called 3D printed open-cell foam. At the current stage of research, nylon powder and plastic acid are utilized as the materials for two different 3D printing technologies: Selective Laser Sintering...
journal article 2023
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Nedumaran, Muthamil Selvan (author), Trilok, Govindappa (author), Gnanasekaran, Nagarajan (author), Hooman, K. (author)
A passive method with phase change material (PCM) is an appropriate technique in electronic cooling. But, due to its poor thermal conductivity, many enhancers are employed to reduce the thermal resistance offered by the PCM. A partial filling strategy to reduce the cost and weight of foams with fins is used in this study. A hybrid heat sink...
journal article 2023
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Li, Xueqiang (author), Zhang, Zhongyao (author), Wang, Qihui (author), Yang, Xiaohu (author), Hooman, K. (author), Liu, Shengchun (author)
Air cooling systems are widely used in current data centers owing to their low capital costs and high reliability. To satisfy the increasing rack power density, the optimal air-cooling technology and an economic analysis should be carefully discussed. Therefore, this study discusses four airflow management technologies: Case 1: raised floor...
journal article 2023
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Nagalingam, Nagaraj (author), Raghunathan, Aswin (author), Korede, V.B. (author), Poelma, C. (author), Smith, C.S. (author), Hartkamp, Remco (author), Padding, J.T. (author), Eral, H.B. (author)
We demonstrate that a cavitation bubble initiated by a Nd:YAG laser pulse below breakdown threshold induces crystallization from supersaturated aqueous solutions with supersaturation and laser-energy-dependent nucleation kinetics. Combining high-speed video microscopy and simulations, we argue that a competition between the dissipation of...
journal article 2023
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Ma, L. (author), Seyed Salehi, H. (author), Jing, R. (author), Erkens, S. (author), Vlugt, T.J.H. (author), Moultos, O. (author), Greenfield, M.L. (author), Varveri, Aikaterini (author)
Water transport is one of the major factors responsible for moisture damage in asphalt pavements. To study the thermodynamics and kinetics of water transport in bitumen and to uncover microscale mechanisms of moisture-induced damage, molecular dynamics simulations were performed for up to 600 ns for water–bitumen systems with realistic water...
journal article 2023
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