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Zhongchao Zhao, Yanrui Zhang, Haojun Mi, Yimeng Zhou and Yong Zhang
The heat pump water heater (HPWH), as a portion of the eco-friendly technologies using renewable energy, has been applied for years in developed countries. Air-source heat pump water heaters and solar-assisted heat pump water heaters have been widely app...
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Ravichandra Kulkarni, Krishnamachar Prasad, Tek Tjing Lie, Rodney A. Badcock, Chris W. Bumby and Hae-Jin Sung
This paper presents a design improvisation of a flux pump-integrated 10 kW high-temperature superconducting (HTS) proof of concept generator for reduced harmonic distortion. To carry out the design improvisation, a finite element analysis (FEA) model of ...
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Maximilian Wendl, Maximilian Högner and Hanieh Fattahi
The dynamic of electron densities in matter upon the interaction with an intense, few-cycle electric field of light causes variety of nonlinear phenomena. Capturing the spatiotemporal dynamics of electrons calls for isolated attosecond pulses in the X-ra...
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Peng Hu, Gao-Wei Zhang, Long-Xiang Chen and Ming-Hou Liu
Electrothermal energy storage (ETES) provides bulk electricity storage based on heat pump and heat engine technologies. A subcritical ETES is described in this paper. Based on the extremum principle of entransy dissipation, a geometry model is developed ...
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William Quitiaquez, Eduardo Cortez, Karen Anchapaxi, C.A. Isaza-Roldán, César Nieto-Londoño, Patricio Quitiaquez, Fernando Toapanta-Ramos
This research work presents a detailed description of the flow patterns maps generated in a horizontal pipe of the collector/evaporator of a direct-expansion solar-assisted heat pump, using R600a refrigerant as working fluid. The study was performed in a...
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William Quitiaquez, Eduardo Cortez, Karen Anchapaxi, C.A. Isaza-Roldán, César Nieto-Londoño, Patricio Quitiaquez, Fernando Toapanta-Ramos
This research work presents a detailed description of the flow patterns maps generated in a horizontal pipe of the collector/evaporator of a direct-expansion solar-assisted heat pump, using R600a refrigerant as working fluid. The study was performed in a...
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Tomislav Strinic, Bianca Wex, Gerald Jungmayr, Thomas Stallinger, Jörg Frevert and Martin Panholzer
A sealless pump, also known as a wet rotor pump or a canned pump, requires a stationary sleeve in the air gap to protect the stator from a medium that flows around the rotor and the pump impeller. Since the sleeve is typically made from a non-magnetic el...
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Hugo Costa, Joana Almeida, Dawei Liang, Miguel Catela, Dário Garcia, Bruno D. Tibúrcio and Cláudia R. Vistas
An alternative multirod solar laser end-side-pumping concept, based on the megawatt solar furnace in France, is proposed to significantly improve the TEM00-mode solar laser output power level and its beam brightness through a novel zigzag beam merging te...
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Michal Klugmann, Pawel Dabrowski and Dariusz Mikielewicz
The paper presents the results of experimental investigations of a model of a heat exchanger featuring a minigap, which is perceived as an evaporator for an inverted thermosiphon. The system works with a single component test fluid. The tested evaporator...
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Jacek Wernik
Investigation of the heat transfer by conduction and convection through a finned housing of an electric motor rated 373 W operated in the drive unit of a vacuum pump was carried out. As the speed is changed, so is the velocity of air flow, and consequent...
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Deshan Kong, Dazhi Wang, Yongliang Ni, Keling Song, Yufei Qi and Yanming Li
The permanent magnet eddy current coupling is widely used in fan and pump equipment as an energy-saving speed control device. The traditional coupling speed adjustment method occupies too much axial space, limiting its application in the process of upgra...
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Seham Shahid and Martin Agelin-Chaab
This paper introduces a novel hybrid thermal management strategy, which uses secondary coolants (air and fluid) to extract heat from a phase change material (paraffin), resulting in an increase in the phase change material?s heat extraction capability an...
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Lucas Schaper, Sven Ackermann, Enrico Allaria, Philipp Amstutz, Karolin Baev, Martin Beye, Christopher Gerth, Ingmar Hartl, Wolfgang Hillert, Katja Honkavaara, Mehdi Mohammad Kazemi, Tino Lang, Pardis Niknejadi, Fabian Pannek, Juliane Rönsch-Schulenburg, Dmitrii Samoilenko, Evgeny Schneidmiller, Siegfried Schreiber, Markus Tischer, Mathias Vogt, Mikhail Yurkov and Johann Zemellaadd Show full author list remove Hide full author list
The successful realization of high gain free-electron lasers has opened new possibilities to X-ray scientists for investigating matter in different states. The availability of unprecedented photon properties stimulated the development of new experimental...
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Michele Bottarelli and Francisco Javier González Gallero
Installation costs of ground heat exchangers (GHEs) make the technology based on ground-coupled heat pumps (GCHPs) less competitive than air source heat pumps for space heating and cooling in mild climates. A smart solution is the dual source heat pump (...
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Rivananda Rama Satria, U. Ubaidillah and Fitrian Imaduddin
This paper has two main goals in the development of a novel flow-mode magnetorheological brake (MRB): (1) produce a mathematical model of a flow-mode MRB and (2) predict the torque density of the proposed MRB compared to the other type of MRB. In this de...
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Adam Kirrander and Peter M. Weber
X-ray Free-Electron Lasers have made it possible to record time-sequences of diffraction images to determine changes in molecular geometry during ultrafast photochemical processes. Using state-of-the-art simulations in three molecules (deuterium, ethylen...
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Chaofeng Li, Jinfeng Mao, Zheli Xing, Jin Zhou and Yong Li
Intermittent operation can improve the coefficient of performance (COP) of a ground source heat pump (GSHP) system. In this paper, an analytical solution to analyze the geo-temperature restoration performance under intermittent operation of borehole heat...
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