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Gábor Fekete, Károly Váradi
Pág. 35 - 40
The paper includes the second part of an investigation of the braking process of railway vehicles, dealing with the temperature distribution of a brake block in various load cases and the FE analysis of the phenomenon of thermal elastic deformation. Ther...
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Junjie Sun, Hao Zhu, Dajun Xu and Guobiao Cai
The mechanical expansion reentry vehicle has become the focus of deep space exploration because of its good deceleration effect and high stability. However, due to its special aerodynamic shape, its surface heat flux characteristics are different from tr...
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Masoud Yousefi, Misagh Moradali
In this paper, the thermodynamic performance of a direct expansion solar assisted heat pump (DX-SAHP), which is used to heat domestic water from 20°C to 45°C, is theoretically investigated. The system includes a 3m2 single-cover flat plate solar collecto...
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Kevin Ignatowicz, François Morency and Héloïse Beaugendre
The effects of atmospheric icing can be anticipated by Computational Fluid Dynamics (CFD). Past studies show that the convective heat transfer influences the ice accretion and is itself a function of surface roughness. Uncertainty quantification (UQ) cou...
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Attila R. Imre, Axel Groniewsky, Gábor Györke, Adrienn Katona, Dávid Velmovszki
Pág. 276 - 285
Recent results are shown about the peculiarities of the pseudo-critical region, with special emphasis on properties important for energy production and conversion. The property-map of some materials, which are relevant as model fluids or as working / coo...
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Young Min Kim, Dong Gil Shin and Chang Gi Kim
This study investigated the effect of the built-in volume ratio of an expander on the performance of a dual-loop Rankine cycle system for the engine waste heat recovery of a vehicle. Varying vehicle operating conditions can cause a positive displacement ...
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A novel method proposed to choose the optimal working fluid—solely from the point of view of expansion route—for a given heat source and heat sink (characterized by a maximum and minimum temperature). The basis of this method is the novel cla...
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Xiaoyi Fu, Yuntao Hua, Wenlai Ma, Hutao Cui and Yang Zhao
Thermal uncertainty analysis of spacecraft is an important method to avoid overdesign and underdesign problems. In the context of uncertainty analysis, thermal models representing multiple operating conditions must be invoked repeatedly, leading to subst...
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Xiaoyi Fu, Lei Liang, Wenlai Ma, Hutao Cui and Yang Zhao
Designing spacecraft involves a careful equilibrium to avoid overengineering or underdesigning, which underscores the importance of employing thermal uncertainty analysis. A key part of this analysis is modeling thermal conditions, but this is often a co...
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Mingxing Cao, Yimin Zhang and Tianfei Hu
This study aimed to investigate the practical applications of a ground source heat pump (GSHP) system for heating applications in embankment engineering. A special direct-expansion GSHP (DE-GSHP) was designed and manufactured, and its performance was exp...
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Francis Benjamín Gorozabel Chata,Tania Carbonell Morales
Una bomba de calor de expansión directa con energía solar (BCAES-ED) es una tecnología de calentamiento de agua con mucho potencial en países con climas tropicales y húmedos siendo relevante realizar análisis basados en la energía y la exergía que ...
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Francis Benjamín Gorozabel Chata,Tania Carbonell Morales
Una bomba de calor de expansión directa con energía solar (BCAES-ED) es una tecnología de calentamiento de agua con mucho potencial en países con climas tropicales y húmedos siendo relevante realizar análisis basados en la energía y la exergía que ...
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This paper is a continuation of the previous work, aiming to explore the influence of fillet configurations on flow and heat transfer in a large meridional expansion turbine. The endwall of large meridional expansion turbine stator has a large expansion ...
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Chih-Wen Chang, Chein-Hung Liu and Cheng-Chi Wang
Meshfree algorithms offer a convenient way of solving nonlinear steady-state problems in arbitrary plane areas surrounded by complicated boundary shapes. The simplest of these is the polynomial expansion approach. However, it is rarely utilized as a prim...
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Qiu Tu, Lina Zhang, Linzhang Li, Chenmian Deng, Bingjun Wang, Binquan Gu and Zhengwu Dai
Heat pumps with water as heat exchange medium applied in greenhouse heating have not been used for vegetable seedling cultivation. In this work, a multi-connected direct expansion capillary radiation heat pump (MDCRHP) was designed for vegetable seedling...
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Giacomo Bagarella, Filippo Busato, Francesco Castellotti, Andrea D?Ascanio, Renato Lazzarin, Fabio Minchio, Daniele Nardotto, Marco Noro and Lorenzo Zamboni
At the Department of Management and Engineering (DTG) of the University of Padova (Italy), the research team led by Prof. Renato Lazzarin, formed by the authors, worked during the first fifteen years of the millennium on different topics focused on susta...
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Oleksandr Mytrofanov,Andrii Poznanskyi,Arkadii Proskurin,Yury Shabalin
Pág. 32 - 38
We have devised a scheme for the energy-generating unit based on the internal combustion engine 1Ch 6.8/5.4 with a spark ignition and a two-stage system for the recovery of heat from the exhaust gases. The basic elements for the first and second stages o...
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Sung-Wei Hsu, Hsiao-Wei D. Chiang and Chih-Wei Yen
In this study, the authors experimentally investigate the performance of the organic Rankine cycle (ORC) and screw expander under the influence of supply pressure and pressure ratio over the expander. Three tests were performed with expander pressure ra...
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Alon Davidy
Hydrogen could be a promising source fuel, and is often considered as a clean energy carrier as it can be produced by ethanol. The use of ethanol presents several advantages, because it is a renewable feedstock, easy to transport, biodegradable, has low ...
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Ting Peng, Caige Sun, Shanshan Feng, Yongdong Zhang and Fenglei Fan
The urban heat island effect caused by the rapid increase in urban anthropogenic heat has gradually become an important factor affecting the living environment of urban residents. Studying the temporal and spatial variation characteristics of urban anthr...
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