Thematische Bibliographien / Prodej tepla

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Auswahl der wissenschaftlichen Literatur zum Thema „Prodej tepla“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 3. Februar 2022

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Zeitschriftenartikel zum Thema "Prodej tepla"

WATANABE, Kunio, Min Maung MAUNG, Yukiyasu FUJII und Enrico FODDE. „EVAPORATION MEASUREMENT FOR THE PRESERVATION OF HISTORICAL BUDDHIST MONASTERY AJINA TEPA, TAJIKISTAN“. PROCEEDINGS OF HYDRAULIC ENGINEERING 52 (2008): 19–24. http://dx.doi.org/10.2208/prohe.52.19.

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Mironov, O. A., S. Zherlitsyn, M. Uhlarz, Y. Skourski, T. Palewski und J. Wosnitza. „Microminiature Hall Probes for Applications at Pulsed Magnetic Fields up to 87 Tesla“. Journal of Low Temperature Physics 159, Nr. 1-2 (07.01.2010): 315–18. http://dx.doi.org/10.1007/s10909-009-0140-4.

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Williams, Emma J., Cliff S. Bunch, T. Adrian Carpenter, Stephen P. M. J. Downey, Iona V. Kendall, Marek Czosnyka, John D. Pickard, John Martin und David K. Menon. „Magnetic resonance imaging compatibility testing of intracranial pressure probes“. Journal of Neurosurgery 91, Nr. 4 (Oktober 1999): 706–9. http://dx.doi.org/10.3171/jns.1999.91.4.0706.

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✓ There is increasing recognition that magnetic resonance (MR) imaging and spectroscopy may provide important information in the assessment of patients with acute brain injury. However, optimum care of the acutely head injured patient requires monitoring of intracranial pressure (ICP). Although many monitoring modalities have been integrated into commercially available MR-compatible systems, there have been no reports of commonly used intraparenchymal ICP sensors in an MR environment. The authors describe the use of an ICP micromanometer probe in an MR environment, with a fiberoptic connection that interfaces the probe with a commercially available MR-compatible monitoring system. Phantom studies were performed to demonstrate the safety and compatibility of the modified MR system at 0.5 tesla. The safety of the device was assessed in relation to its interaction with the static, gradient, and radiofrequency fields used in MR imaging. The MR compatibility was documented by demonstrating that its performance was unaffected by the operation of imaging sequences and by showing that there was no degradation of the diagnostic quality of imaging data obtained during ICP monitoring.

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Zelenchuk, A. V., und V. A. Krylenkov. „Probes for the study of icy and subglacial environment of planets“. Ice and Snow 59, Nr. 1 (20.03.2019): 123–34. http://dx.doi.org/10.15356/2076-6734-2019-1-123-134.

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The article proposes a technology for increasing the thermic ice drilling rate under the influence of hydraulic force generated by the probe (or cryobot), which increases the coefficient of conversion of thermal energy into the energy of ice melting and allows increasing the power of thermal head of the probe. A single-wire Tesla system is proposed to use for the probe power supply, which makes it possible to reduce the volume of the cable and losses of transmitted energy. The method of the probe self-lifting to the ice surface without using the hydraulic force (traction), i.e. without a load on the cable, is proposed. To study thick (up to 5 km) ice sheets and subglacial water environments on the Earth, as well as the ice cover (up to 30 km thick) and the subglacial ocean of the Europe (the Jupiter’s satellite), conceptual principal designs of the probe (or cryobot) have been developed on the basis of thermic-hydraulic drilling (THD). Implementation of the THD‑cryobot designs will allow organizing systemic studies of glaciers and subglacial water environments on the Earth and other planets, not disturbing their ice isolation with multiple savings of financial and technical means, energy and time.

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Obertová, Z. „Vtelená kognícia, jej filozofické východiská a potenciálny význam pre pedagogiku“. Pedagogická orientace 23, Nr. 3 (19.07.2013): 298–317. http://dx.doi.org/10.5817/pedor2013-3-298.

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Cieľom príspevku je teoreticky priblížiť teóriu vtelenej kognície, zasadiť ju do širšieho filozofického rámca a uviesť jej potenciálny prínos pre pedagogiku. Príspevok postupuje od ozrejmenia samotného pojmu vtelenie, jeho pôvod vo fenomenológii (M. Merleau-Ponty) i využitie v kultúrnej antropológii (T. J. Csordas). V ďalšej časti sa venujeme filozofickému rámcu, ktorý mal vplyv na teóriu vtelenej kognície a potlačenie dualistického pohľadu na telo a myseľ, ozrejmujeme aspekty vtelenia dotvárajúce obraz vtelenia. V rámci prínosu vtelenej kognície pre súčasnú pedagogiku sa zameriavame na dve oblasti skúmania vtelenej kognície, a to na jazyk a matematiku, ktoré sú považované za prevažne kognitívne a abstraktné koncepty oddelené od tela. Ukázalo sa, že teória vtelenej kognície nedostatočne vysvetľuje to, čo vlastne telo je, a o akom tele sa tu pojednáva. Z uvedeného vyplýva, že v oboch uvádzaných oblastiach (jazyk a matematika) je významnou časťou najmä skúmanie a význam gest a telesnej skúsenosti pre proces chápania abstraktným systémom a učenia. Zistili sme, že prínos vtelenej kognície pre pedagogiku spočíva v orientácii na telesné konanie, aktivitu a vplyv prostredia a telesnej skúsenosti na kogníciu, ktoré uľahčujú proces učenia.

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Moro, Jeanne, Pablo Cesar Bassani Correa und Eduardo Krüger. „Avaliação da Eficiência Energética do Tribunal de Contas do Paraná, sediado em Curitiba“. Paranoá: cadernos de arquitetura e urbanismo, Nr. 28 (05.09.2020): 1–22. http://dx.doi.org/10.18830/issn.1679-0944.n28.2020.06.

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A procura por maior eficiência energética no uso da eletricidade trouxe inúmeras iniciativas louváveis, no Brasil sob responsabilidade maior do Procel, com campanhas de conscientização dos usuários, pela etiquetagem de aparelhos eletrodomésticos até o panorama atual de certificação de edificações. O presente estudo tem como objetivo principal avaliar o nível de eficiência energética por meio dos Requisitos Técnicos da Qualidade do Nível de Eficiência Energética para Edifícios Comerciais, de Serviços e Públicos (RTQ-C/Procel) do Tribunal de Contas (TC), parte do patrimônio histórico do Estado do Paraná, localizado no Centro Cívico de Curitiba. TC é composto de dois edifícios construídos e um terceiro edifício em projeto: o Edifício Sede, o Edifício Anexo e a Ampliação do Edifício Anexo. No Edifício Sede, foram analisados indicadores de possível economia energética resultante da melhoria dos sistemas de iluminação (natural e artificial). Na ampliação do Edifício Anexo, avaliou-se a aplicabilidade do sistema de sombreamento de fachadas denominado tela tensionada. Comprovou-se que os edifícios existentes apresentam grande potencial de economia energética em sistemas de iluminação e que, ao se aprimorarem os dispositivos de sombreamento da fachada no projeto de ampliação do Edifício Anexo, podem ser alcançados maiores níveis de eficiência energética no quesito envoltória.

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Reimann, Carolin, Julia Brangsch, Jan Ole Kaufmann, Lisa C. Adams, David C. Onthank, Simon P. Robinson, Rene M. Botnar, Federico Collettini und Marcus R. Makowski. „Contrast-Enhanced Magnetic Resonance Angiography Using a Novel Elastin-Specific Molecular Probe in an Experimental Animal Model“. Contrast Media & Molecular Imaging 2018 (23.10.2018): 1–9. http://dx.doi.org/10.1155/2018/9217456.

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Objectives. The aim of this study was to test the potential of a new elastin-specific molecular agent for the performance of contrast-enhanced first-pass and 3D magnetic resonance angiography (MRA), compared to a clinically used extravascular contrast agent (gadobutrol) and based on clinical MR sequences. Materials and Methods. Eight C57BL/6J mice (BL6, male, aged 10 weeks) underwent a contrast-enhanced first-pass and 3D MR angiography (MRA) of the aorta and its main branches. All examinations were on a clinical 3 Tesla MR system (Siemens Healthcare, Erlangen, Germany). The clinical dose of 0.1 mmol/kg was administered in both probes. First, a time-resolved MRA (TWIST) was acquired during the first-pass to assess the arrival and washout of the contrast agent bolus. Subsequently, a high-resolution 3D MRA sequence (3D T1 FLASH) was acquired. Signal-to-noise ratios (SNRs) and contrast-to-noise ratios (CNRs) were calculated for all sequences. Results. The elastin-specific MR probe and the extravascular imaging agent (gadobutrol) enable high-quality MR angiograms in all animals. During the first-pass, the probes demonstrated a comparable peak enhancement (300.6 ± 32.9 vs. 288.5 ± 33.1, p>0.05). Following the bolus phase, both agents showed a comparable intravascular enhancement (SNR: 106.7 ± 11 vs. 102.3 ± 5.3; CNR 64.5 ± 7.4 vs. 61.1 ± 7.2, p>0.05). Both agents resulted in a high image quality with no statistical difference (p>0.05). Conclusion. The novel elastin-specific molecular probe enables the performance of first-pass and late 3D MR angiography with an intravascular contrast enhancement and image quality comparable to a clinically used extravascular contrast agent.

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Ji, Yiyi, Lukas Winter, Lucila Navarro, Min-Chi Ku, João S. Periquito, Michal Pham, Werner Hoffmann, Loryn E. Theune, Marcelo Calderón und Thoralf Niendorf. „Controlled Release of Therapeutics from Thermoresponsive Nanogels: A Thermal Magnetic Resonance Feasibility Study“. Cancers 12, Nr. 6 (27.05.2020): 1380. http://dx.doi.org/10.3390/cancers12061380.

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Thermal magnetic resonance (ThermalMR) accommodates radio frequency (RF)-induced temperature modulation, thermometry, anatomic and functional imaging, and (nano)molecular probing in an integrated RF applicator. This study examines the feasibility of ThermalMR for the controlled release of a model therapeutics from thermoresponsive nanogels using a 7.0-tesla whole-body MR scanner en route to local drug-delivery-based anticancer treatments. The capacity of ThermalMR is demonstrated in a model system involving the release of fluorescein-labeled bovine serum albumin (BSA-FITC, a model therapeutic) from nanometer-scale polymeric networks. These networks contain thermoresponsive polymers that bestow environmental responsiveness to physiologically relevant changes in temperature. The release profile obtained for the reference data derived from a water bath setup used for temperature stimulation is in accordance with the release kinetics deduced from the ThermalMR setup. In conclusion, ThermalMR adds a thermal intervention dimension to an MRI device and provides an ideal testbed for the study of the temperature-induced release of drugs, magnetic resonance (MR) probes, and other agents from thermoresponsive carriers. Integrating diagnostic imaging, temperature intervention, and temperature response control, ThermalMR is conceptually appealing for the study of the role of temperature in biology and disease and for the pursuit of personalized therapeutic drug delivery approaches for better patient care.

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Yousefvand, Milad, Zahra Mohammadi, Farzaneh Ghorbani, Rasoul Irajirad, Hormoz Abedi, Somayyeh Seyedi, Arash Papi und Alireza Montazerabadi. „Investigation of Specific Targeting of Triptorelin-Conjugated Dextran-Coated Magnetite Nanoparticles as a Targeted Probe in GnRH+ Cancer Cells in MRI“. Contrast Media & Molecular Imaging 2021 (17.05.2021): 1–10. http://dx.doi.org/10.1155/2021/5534848.

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In recent years, the conjugation of superparamagnetic iron oxide nanoparticles (SPIONs), as tumor-imaging probes for magnetic resonance imaging (MRI), with tumor targeting peptides possesses promising advantages for specific delivery of MRI agents. The objective of the current study was to design a targeted contrast agent for MRI based on Fe3O4 nanoparticles conjugated triptorelin (SPION@triptorelin), which has a great affinity to the GnRH receptors. The SPIONs-coated carboxymethyl dextran (SPION@CMD) conjugated triptorelin (SPION@CMD@triptorelin) were synthesized using coprecipitation method and characterized by DLS, TEM, XRD, FTIR, Zeta, and VSM techniques. The relaxivities of synthetized formulations were then calculated using a 1.5 Tesla clinical magnetic field. MRI, quantitative cellular uptake, and cytotoxicity level of them were estimated. The characterization results confirmed that the formation of SPION@CMD@triptorelin has been conjugated with a suitable size. Our results demonstrated the lack of cellular cytotoxicity of SPION@CMD@triptorelin, and it could increase the cellular uptake of SPIONs to MDA-MB-231 cancer cells 6.50-fold greater than to SPION@CMD at the concentration of 75 μM. The relaxivity calculations for SPION@CMD@triptorelin showed a suitable r2 and r2/r1 with values of 31.75 mM−1·s−1 and 10.26, respectively. Our findings confirm that triptorelin-targeted SPIONs could provide a T2-weighted probe contrast agent that has the great potential for the diagnosis of GnRH-positive cancer in MRI.

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Diedrich, Stephan, Julia van der Linde, Michael Nielson, Pia Menges, Jens-Peter Kühn, Andre Käding, Dung Ngyuen Trung, Claus-Dieter Heidecke, Lars Ivo Partecke und Wolfram Kessler. „The MRI Sepsis Score: An Innovative Tool for the Evaluation of Septic Peritonitis in Mice Using 7-Tesla Small Animal MRI“. European Surgical Research 59, Nr. 3-4 (2018): 126–42. http://dx.doi.org/10.1159/000490663.

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Background: Magnetic resonance imaging (MRI) techniques are rarely used in the context of abdominal sepsis and in sepsis research. This study investigates the impact of MRI for monitoring septic peritonitis in an animal model (colon ascendens stent-induced peritonitis, CASP). The CASP model closely mimics that of human disease and is highly standardized. The most frequently employed readout parameter in mouse CASP studies is prolonged or decreased rate of survival. Monitoring the progression of peritonitis via MRI could provide a helpful tool in the evaluation of severity. The use of alternative readout systems could very well reduce the number of research animals. Perspectively, clinical improvement after certain treatment could be classified. Methods: This study describes for the first time MRI findings following the induction of septic peritonitis in mice using the CASP model. Two sublethal groups of mice with septic peritonitis were investigated. Each had received one of two differing stent diameters in order to control the leakage of feces into the abdominal cavity. Each mouse served as its own control. Imaging and analyses were performed blinded. Gut diameters, stomach volume, abdominal organ wall diameters, and volume of the adrenal glands were measured. Serum corticosterone levels were detected using ELISA. Serum IL-6, TNF-α, IL-1β, and IL-10 levels were screened by cytometric bead array. Statistical analysis was performed using the Mann-Whitney U test for nonparametric probes and the Kruskal-Wallis and t tests. Results: Using a 7-tesla MRI scanner 24 and 48 h after induction of septic peritonitis, interenteric fluid, organ swelling of spleen and adrenal glands, as well as dilatation of the stomach were compared to nonseptic conditions. Swelling of adrenal glands resulted in an increased serum corticosterone level. In addition, the wall of the intestine bowel was thickened. Based upon these findings, an MRI score (MRI sepsis score, MSS) for abdominal sepsis in mice was established. Reduced stent sizes led to reduced severity of the abdominal sepsis, which could be reproduced in the MSS, which is described here for the first time. Conclusions: Intraabdominal variations during septic peritonitis are detectable by MRI techniques. MRI methods should become a more important tool for the evaluation of abdominal peritonitis. MSS could provide an interesting tool for the evaluation of therapeutic strategies.

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Dissertationen zum Thema "Prodej tepla"

Veverková, Pavlína. „Hodnocení marketingové komunikace hotelu Klášter Teplá“. Master's thesis, Česká zemědělská univerzita v Praze, 2016. http://www.nusl.cz/ntk/nusl-258756.

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The main objective of the thesis is to evaluate the instruments of the marketing communication in the hotel and to develop the suggestions for its improvement. The first part is devoted to the theoretical knowledges about the marketing and marketing services. It is based on the study of secondary data. The second part is focused on the analysis of the current instruments in the marketing communication. The results of the analysis are the recommendations for its improvement and the efficiency that should lead to increase the occupancy and improve the whole economic situation of the hotel. There are the implements suggested to be used by the hotel management at the end of thesis.

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Čech, Jan. „Provozně-ekonomické posouzení instalace nové turbíny“. Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2021. http://www.nusl.cz/ntk/nusl-442874.

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This diploma thesis deals with the operational and economic assessment of the installation of new TG3 turbines in the Přerov Heating Plant. The beginning of this thesis deals with a brief theoretical introduction of this investment and describes the classical economic evaluation methods and the Monte Carlo method. Subsequently, the investment project was analyzed and inputs for the economic model were created. The economic model was then evaluated using classical methods and Monte Carlo methods, the results are then compared with each other. Based on the results of the economic evaluation, the most efficient variant of the Přerov Heating Plant technology was chosen.

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Farníková, Jana. „Studie průběhu zakázky podnikem“. Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2013. http://www.nusl.cz/ntk/nusl-224179.

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This thesis focusses on how a specific order is processed in a specific company. The analysis is more specifically focussed on heat meters, which make up a substantial part of the company sales. It contains suggestions on how the company could process these orders using a program called Microsoft Project, which could benefit the company in many respects.

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Julinová, Patricie. „Návrh opatření pro snížení energetické náročnosti prodejny potravin“. Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240210.

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The master thesis deals with measures to reduce energy performance of grocery store building. Model of the grocery store is evaluated according to a recommended energy values specified by Czech standards and according to the real values of the actual consumption. These values are compared. Final building analysis for a proposal measures to reduce energy consumption is based on the invoices of the real consumption and on the experimental assignments. Experimental measurements are the Blower door test of the tightness of the building envelope, the measures with the thermovision camera and the measuring of the illumination intensity. The most efficient proposal is extended to the whole model network of the food shops in the Czech Republic.

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Staňo, Martin. „Testování teplených zdrojů spalujících dřevo a dřevěnou štěpku“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-377648.

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This master thesis focuses on the testing of the combustion equipment and the wood fuel combustion process. The aim of the thesis is to get acquainted with this issue and to analyze solutions for monitoring and control of heat source parameters according to valid legislation. The result of this thesis is the realization and verification of the software design of the combustion test system using the NI LabVIEW development environment.

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Štencl, Roman. „Posouzení vlivu různých variant řešení otopné soustavy na hodnotu bytového domu“. Master's thesis, Vysoké učení technické v Brně. Ústav soudního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-320394.

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This master’s thesis deals with influence of heat source on the value of the apartment building. The introduction describes the calculation of heat losses, types of heating systems, heating elements, heat sources for heating and hot water, methods of market valuation. Further are chosen two variants of heat sources for heating and domestic hot water for the Domino apartment building. Both heating elements are designed to cover the heat losses of the house. At the end of the thesis is an evaluation of the return of a more expensive variant, but cheaper to operate, profit from sale and profibility on rent of the apartment building.

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Boček, Milan. „Zdravotně technické a plynovodní instalace v supermarketu“. Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-371833.

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This master’s thesis deals with the overall sanitary and gas pipeline installation in a supermarket. The theoretical part deals with equipment and requirements for large kitchens with regard to the food preparation in this building. The computing and design part deals with the sewerage, water supply and gas distribution in the supermarket. The property counts over six thousand square meters and is partly two-storeyed. There are also several smaller sales units in addition to the sales areas, facility for staff and warehouses. The diploma thesis is based on current Czech and European regulations.

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Bücher zum Thema "Prodej tepla"

Il coven/Der Hanf: Dil sem tier la teila/vom Samen zum Tuch. Cuera, CH/Flond, CH: Danuet Camenisch, 2009.

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Buchteile zum Thema "Prodej tepla"

REIS DA SILVA, FABIANO, und JACKSON COSTA PINHEIRO. „AR3D ARTHROPODA UM APLICATIVO DE REALIDADE AUMENTADA PARA ENSINO DE ARTRÓPODES“. In Itinerários de resistência: pluralidade e laicidade no Ensino de Ciências e Biologia. Editora Realize, 2021. http://dx.doi.org/10.46943/viii.enebio.2021.01.100.

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O AR3D ? UM APLICATIVO (APP) DE REALIDADE AUMENTADA (RA), GRATUITO, E FOI PRODUZIDO COMO UM DOS REQUISITOS DE APROVA??O PARA OBTEN??O DO GRAU DE MESTRE EM ENSINO DE BIOLOGIA (PROFBIO/UFPA). ELE FOI ESTRUTURADO PARA DISPOSITIVOS M?VEIS COM SISTEMA OPERACIONAL ANDROID E TRAZ UMA NOVA FORMA DE OBSERVAR OS ARTR?PODES NO AMBIENTE ESCOLAR. O APP COMBINA ELEMENTOS VIRTUAIS EM 3D DE ANIMAIS COM O AMBIENTE REAL, POSSIBILITANDO UMA INTERATIVIDADE DO USU?RIO COM AS IMAGENS PROJETADAS NA TELA DO DISPOSITIVO. ESSE APP CONTA COM UM MANUAL DE INSTRU??ES, ONDE APRESENTA INFORMA??ES B?SICAS, COMO POR EXEMPLO, OS REQUISITOS M?NIMOS DO DISPOSITIVO M?VEL, C?DIGO QR USADO PARA OBTER O GUIA DE INSTALA??O E USO DO APP. NO MANUAL TAMB?M EXISTEM OS MARCADORES PARA A REPLICA??O (PROJE??ES, IMPRESS?ES OU C?PIAS). S?O UM TOTAL DE 60 (SESSENTA), REPRESENTANDO CADA UM UMA ESP?CIE DE ARTR?PODE.

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Konferenzberichte zum Thema "Prodej tepla"

Dodsworth, Laura, und Dominic Groulx. „Operational Parametric Study of a Tesla Pump: Disk Pack Spacing and Rotational Speed“. In ASME/JSME/KSME 2015 Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ajkfluids2015-33220.

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A Tesla pump was designed and built with the objective of being a compact and rugged pump for cooling electronics. A Tesla pump is a bladeless pump that uses spinning disks to move fluid. Due to the nature of the pump, cavitation is avoided, and the lack of conventional blades makes it rugged and easy to build. A continuous test loop was designed and used to produce pump curves at several different disk pack spacings and motor speeds. Pump curves were obtained and analyzed for this prototype Tesla pump. It was determined the smallest spacing tested proved to be the most efficient, especially at the highest motor speed. A relationship between disk pack gap and efficiency was found, as well as one between the pump’s performance and motor speed.

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Renuke, Avinash, Federico Reggio, Paolo Silvestri, Alberto Traverso und Matteo Pascenti. „Experimental Investigation on a 3 kW Air Tesla Expander With High Speed Generator“. In ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/gt2020-14572.

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Abstract Tesla bladeless turbomachines are recently being investigated due to many advantages such as its simple design and ease of manufacturing. If an efficient design is achieved, this will be a promising machine in the area of small-scale power generation and energy harvesting. This paper focuses on the experimental performance investigation of 3 kW (rated power) Tesla bladeless expander. The Tesla expander and electric generator are housed in a single casing making it first of its kind being tested with such configuration. The expander is fed with air and operated at high rotational speeds up to 40000 rpm. The test is carried out with different number of nozzles to understand its effect on the performance. Results show that the peak efficiency for two nozzles is better than one nozzle and four nozzle configurations for the same inlet pressure conditions. Experimental tests revealed that this turbine is most efficient Tesla turbine till now with air as a working fluid. Furthermore, one of the most important losses in Tesla turbomachines, nozzle loss, is experimentally characterized. Specific vibrational tests were carried out to obtain complete machine dynamical characterization. The vibrational response characterization of the turbine enabled us to recognize a disk mode family solicited by the air flow and to perform a proper machine maintenance and balancing aiming to reduce the energy of its operational vibration.

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Song, Jian, und Chun-wei Gu. „1-D Model Analysis of Tesla Turbine for Small Scale Organic Rankine Cycle (ORC) System“. In ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-63797.

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Energy shortage and environmental deterioration are two crucial issues that the developing world has to face. In order to solve these problems, conversion of low grade energy is attracting broad attention. Among all of the existing technologies, Organic Rankine Cycle (ORC) has been proven to be one of the most effective methods for the utilization of low grade heat sources. Turbine is a key component in ORC system and it plays an important role in system performance. Traditional turbine expanders, the axial flow turbine and the radial inflow turbine are typically selected in large scale ORC systems. However, in small and micro scale systems, traditional turbine expanders are not suitable due to large flow loss and high rotation speed. In this case, Tesla turbine allows a low-cost and reliable design for the organic expander that could be an attractive option for small scale ORC systems. A 1-D model of Tesla turbine is presented in this paper, which mainly focuses on the flow characteristics and the momentum transfer. This study improves the 1-D model, taking the nozzle limit expansion ratio into consideration, which is related to the installation angle of the nozzle and the specific heat ratio of the working fluid. The improved model is used to analyze Tesla turbine performance and predict turbine efficiency. Thermodynamic analysis is conducted for a small scale ORC system. The simulation results reveal that the ORC system can generate a considerable net power output. Therefore, Tesla turbine can be regarded as a potential choice to be applied in small scale ORC systems.

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Castro, Maria Fernanda, und Patrícia Tedesco. „Aplicação de Conceitos de Wayfinding em Interfaces Mobile de Recomendação de Rota“. In X Simpósio Brasileiro de Sistemas de Informação. Sociedade Brasileira de Computação - SBC, 2014. http://dx.doi.org/10.5753/sbsi.2014.6137.

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Tecnologias mobile permitiram o surgimento de diversas ferramentas que auxiliam usuários em tarefas diárias. Entre elas, aplicativos de recomendação de rota ganham espaço como poderosos aliados à mobilidade urbana. Porém, com o crescimento das cidades e complexidade de suas malhas de transporte, prover serviços de mobilidade tornou-se um desafio, devido à tamanha quantidade de informação na relativamente pequena tela de um smartphone. Este artigo propõe um protótipo de recomendação de rota mobile que utiliza técnicas da área de Wayfinding para representar dados do mapeamento, visando uma interface mais eficiente e intuitiva, bem como um experimento de validação e seus resultados.

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Williams, Alicia M., und Pavlos P. Vlachos. „The Dynamics of Accumulating Ferrofluid Aggregates“. In ASME 2008 Fluids Engineering Division Summer Meeting collocated with the Heat Transfer, Energy Sustainability, and 3rd Energy Nanotechnology Conferences. ASMEDC, 2008. http://dx.doi.org/10.1115/fedsm2008-55101.

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The physics of steady and pulsatile flows laden with superparamagnetic nanoparticles in a square channel accumulating under the influence of a 0.5 Tesla permanent magnet are studied by means of focused shadowgraphs. The accumulation physics of these nanoscale particles is explored as functions of the flow type (steady and unsteady) and accumulation type (injected from the top of channel versus bottom of channel). Ferrofluid is accumulated by the steady injection of a streakline that enters the test section upstream of the magnet, where an aggregate forms. The interfacial phenomena resulting from the interaction of the ferrofluid with the bulk flow is resolved using shadowgraph imaging, where a digital camera captures the side view of the aggregate. Ferrofluid aggregate physics is examined both visually in the raw frames as well as by post-processing to determine the aggregate size evolution in time and couple that bulk information with interfacial behavior using the Proper Orthogonal Decomposition (POD). The shadowgraphs show that the aggregate exhibits different regimes based on bulk flow Reynolds number, which is varied between 100 and 1000, based on the mean flow rate. The aggregate exhibits stable behavior at low Reynolds numbers, where it stretches as it grows and minimal decay of the aggregate occurs. At moderate Reynolds numbers above 400, inertial forces dominate the dynamics, and aggregates do not attain the same size and height as in low Reynolds number cases. Therefore, the interaction of the aggregate with the bulk flow is diminished. The accumulation of ferrofluids is positively impacted by increased magnetic field gradients for some Reynolds numbers, while very high or low magnetic field gradients result in smaller, unstable aggregates. This work is the first to study the accumulation of ferrofluid aggregates over such a large parameter space, which reveals many physics that were previously unexplored in ferrohydrodynamics.

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Decoret, Laurent, Laurent Bastard und Tegwen de Kerdanet. „PAZFLOR Flexible Riser Diverless Bend Stiffener Fixation: Successful Innovation From Concept to Project Implementation“. In ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/omae2012-84104.

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For the TOTAL E&P Angola (TEPA) PAZFLOR field development, the decision was taken at the tender stage to propose an innovative diverless Bend Stiffener Fixation system (BSF) to connect the flexible risers to the FPSO. Avoiding diving intervention was driven primarily in order to minimize weather downtime during this critical offshore installation phase. Technip decided to develop its own system to retain full control of the design process and ensure it fulfilled all the installation constraint requirements. The patented system consists of a 3 part clamp activated by a hydraulic motor controlled from topside. An innovative disconnection device is used to release the riser pulling head once the bend stiffener is clamped to the I-tube. The development of the BSF was handled by an integrated team as a “project within the project”. From the start a robust design gate review process was applied to rapidly freeze the design of the system main components and enable the initial order placement of the long lead items. This was critical to ensure on time delivery to the FPSO Contractor. Extensive full scale testing was performed to ensure good reliability of all the system components. This testing enabled further optimization of parts of the system, particularly the items mounted on the risers to provide the maximum operability. Finally the involvement of the installation team from the onset ensured that robust installation procedures and operations were developed. The hook-up operations for the 21 risers was conducted safely with no weather downtime and with a riser connection cycle faster than planned. This proves that implementation of innovative design solutions can be successfully managed from initial concept to final installation within a project environment, ultimately enabling faster hand over for first oil.

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