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Wuite, F.G.E. (author), Peng, Zhikai (author), Kim, K.J. (author), Lugten, M.C. (author), Tenpierik, M.J. (author)This study aims to evaluate the impact of different urban building geometries (six courtyards, two canyons, two slabs) on heat mitigation and aircraft noise attenuation, in order to support an evidence-based retrofit plan for future airport neighborhoods. Using ’Pachyderm + ENVI-met simulations + field measurements’, we found that the slanted...conference paper 2024
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Li, Wenyu (author), Chen, Wei (author), Jiang, Jing (author), Wang, Wenbo (author), Fan, Xuejun (author), Zhang, Kouchi (author), Fan, Jiajie (author)Thermal management has always played a significant role in power module design. Double-sided heat dissipation is more efficient at transferring heat than the traditional package. Although there are several thermal modeling approaches to power modules, the application of the numerical models, which are computationally fast and accurate, has...conference paper 2024
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de Raad, B.W. (author), van Lieshout, Marit (author), Stougie, L. (author), Ramirez, Andrea (author)Steam generating heat pumps show great potential for reducing carbon emissions in the industrial sector. However, predicting their performance is challenging as the exergy destruction of e.g., compressors and expansion valves increases with the temperature lift and condenser temperature. With over seventy design improvements mentioned in the...conference paper 2023
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Damianakis, Nikolaos (author), Chandra Mouli, G.R. (author), Bauer, P. (author)An important aspect of the energy transition is the expected grid impact due to the abrupt increase of distributed electric generation and electric load demand. A part of this impact is going to be inflicted by the electrification of heating with heat pumps (HPs). Therefore, it is essential that the future power consumption of electric...conference paper 2023
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Tenpierik, M.J. (author), Turrin, M. (author), van der Spoel, W.H. (author)Phase change materials (PCMs) have already been used in buildings and building services for several decades, mostly integrated into walls or ceilings to passively increase the building’s thermal inertia, or integrated into the HVAC system for (pre-)heating or (pre-)cooling fresh air. More recently, the use of PCMs in facades is being explored...conference paper 2022
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Ghering, Victor (author), van den Brom, P.I. (author), Itard, L.C.M. (author), Schipper, H.R. (author)Low Temperature Heating (LTH) of buildings is a key feature when switching to renewable energy. Even when the capacity of LTH is high enough, LTH may adversely affect indoor thermal comfort in case buildings are not suitably insulated. This paper goes deeper into methodological issues when conducting a thermal comfort assessment. Thermal comfort...conference paper 2022
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Vanhamel, J. (author), Eaton, Nicholas (author), Spreij, Roemer (author)Currently, the amount of space debris is increasing rapidly due to the tremendous amount of satellite launches. Having an autonomous re-entry system aboard satellites at their end-of life, creates possibilities in the frame of lowering space debris, as well as for sample return from space. This paper aims at describing two possible deployment...conference paper 2022
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Gradl, P.R. (author), Cervone, A. (author), Colonna, Piero (author)Heat exchangers for use in propulsion applications are very critical components because they must be efficient, compact and light and often operate with working fluids at extreme temperatures or pressures or both. Various components and systems use heat exchangers such as combustion chambers of gas turbines and internal combustion engines, fuel...conference paper 2022
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Wahi, P. (author), Konstantinou, T. (author), Tenpierik, M.J. (author), Visscher, H.J. (author)In the Netherlands, district heating with a lower temperature supply (<70°C) will play a crucial part in accomplishing the energy transition goals of delivering natural gas-free sustainable heating to dwellings. The existing dwellings often require energy renovations to make them suitable for lower temperature heating. However, choosing...conference paper 2022
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Wu, J. (author), Everhardt, Rob (author), Stepanovic, K. (author), de Weerdt, M.M. (author)District heating system (DHS) optimization is becoming an increasingly important problem because of the unused potential in flexibility that could allow less energy being wasted and the integration of renewable energy. While new optimization methods are proposed every year to tackle this problem, the literature lacks a good way to benchmark...conference paper 2022
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Jimenez del Toro, A. (author), Teuwen, Julie J.E. (author), Tomás, Flanagan (author), Finnegan, William (author)Laser-assisted tape placement (LATP) and thermoplastic composites (TPCs) pre-impregnated (prepreg) tapes are a promising combination of technologies; given the in-situ capabilities of the TPCs and the high degree of automation achievable with LATP. However, laminate quality, measured as final void content, tends to decrease when increasing...conference paper 2022
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Chicco, Jessica Maria (author), Antonijevic, Dragi (author), Bloemendal, Martin (author), Cecinato, Francesco (author), Goetzl, Gregor (author), Hajto, Marek (author), Hartog, Niels (author), Mandrone, Giuseppe (author), Vacha, Damiano (author), Vardon, P.J. (author)For efficient operation of heating and cooling grids, underground thermal energy storage (UTES) can be a key element. This is due to its ability to seasonally store heat or cold addressing the large mismatch between supply and demand. This technology is already available and there are many operational examples, both within and outside a...conference paper 2022
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Gusain, D. (author), Cvetkovic, M. (author), Yağci, Bekir Caner (author), Palensky, P. (author)Power-to-X (PtX) technologies are accelerating the energy transition. Increasingly, these technologies are also being leveraged as flexible energy resources to support the electrical grid. PtX models are often represented using a constant efficiency term as a linear relation between the power input and energy output. However, the operational...conference paper 2022
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Gaona, David (author), Vermeer, W.W.M. (author), Chandra Mouli, G.R. (author), Bauer, P. (author)An integrated energy system consisted of PV panels, EV (electric vehicle), BES (battery energy storage), and a HP (heat pump) coupled with thermal storage tanks (TES) has been studied. The research aimed to minimize the total energy costs by scheduling the optimal power consumption of each device as response to two external signals as part of a...conference paper 2022
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Ramu, Yogesh K. (author), Thomas, Paul (author), Sirivivatnanon, Vute (author)Heat cured cement mortars may result in linear expansion due to later age ettringite precipitation, popularly termed as delayed ettringite formation (DEF). However, later age ettringite precipitation may not result in expansion always. To differentiate the expansive and non-expansive nature of heat-cured cementitious systems, in this research...conference paper 2021
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Delsaute, B. (author), Gambacorta, J. (author), Staquet, S. (author)Blended pastes composed of slag and fly ash (ratio 50:50) are used with sodium hydroxide and sodium silicate as precursors. Each composition has the same solution to binder ratio (S/B) and the Ms-modulus varies between 1.04 and 1.58. All the experiments were conducted at a constant temperature of 20°C. The physical mechanisms related to the...conference paper 2021
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Phung, Quoc Tri (author), Seetharam, Suresh .C. (author), Ferreira, Eduardo (author), Govaerts, Joan (author), Hendrix, Katrien (author), Valcke, Elie (author)This paper presents an extension of an existing phenomenological model for predicting the evolution of hydration heat of a cemented waste form. The cemented waste form is essentially a mixture of blended cement and homogeneous low- and intermediate-level liquid (simulant) radioactive waste (sludge). The motivation stems from the fact that the...conference paper 2021
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Chen, Chen (author), Zheng, Qi (author), Jiang, Jinyang (author)In this paper, composite material C-S-H/PEG1000 was prepared by multi-scale porous material C-S-H as support and phase change material (PCM) PEG1000 by melt blending, so that it can reduce hydration heat of cementitious system utilizing the characteristics of releasing and storing energy of PCM. TEM, IR, DSC-Tg, BET, MIP and various other...conference paper 2021
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Effect of reactive aggregate on the early age reaction of water-glass activated slag/fly ash mortarsWang, Wei (author), Zhang, Shizhe (author), Guang, Ye (author), Noguchi, Takafumi (author)Alkali activated materials (AAMs) have received worldwide attention due to its lower embodied energy and environmental impact than that of traditional cementitious materials. However, the activators with high alkalinity may raise the risk of alkali silica reaction (ASR) induced deterioration when reactive aggregates are used, which thereby...conference paper 2021
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Verhoeven, Gijs (author), Vergara Barrios, P.P. (author), Kok, Koen (author)Currently, the majority of the available test feeder models are based on the North American type of distribution systems, leaving an absence of representative feeder models for the European (and Dutch) types of distribution systems. Therefore, a standardized set of power flow models for typical Dutch LV distribution networks is developed using...conference paper 2021