Relevant bibliographies by topics / Heat generation and transport

Academic literature on the topic 'Heat generation and transport'

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Published: 10 March 2023

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Journal articles on the topic "Heat generation and transport"

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van Beek, Johannes H. G. M. "Heat generation and transport in the heart." Journal of Engineering Physics and Thermophysics 69, no. 3 (May 1996): 287–97. http://dx.doi.org/10.1007/bf02606947.

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Khassaf, Nada K., and AL-Mukh J.M. "The Role of Electron-Phonon Coupling in Spin Transport through FM-QD Molecular-FM in the Presence of Spin Accumulation in the Leads." NeuroQuantology 20, no. 5 (April 30, 2022): 16–24. http://dx.doi.org/10.14704/nq.2022.20.5.nq22144.

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The spin transport process through quantum dot molecular, embedded between two ferromagnetic leads in parallel configuration with the presence of spin accumulation, is studied by getting use of the non-equilibrium Keldysh – Green’s function technique. The electron-phonon coupling can be implicitly considered in the model, using the canonical transformation where a single phonon mode is considered in the strong electron – phonon coupling regime. Since the heat may interchange between the quantum dot molecular and the phonon bath coupled to it. And as the principle aim of our study is to determine the parameters that afford high spin (charge) heat generation, that must be avoid in the experimental applications, all the spin transport properties are investigated throughout the calculation of the spin and charge accumulation on the quantum dot molecular, the spin polarized currents, the spin and charge currents, the spin polarized heat generations, the spin heat generation and the charge heat generation. The calculations are accomplished as a function of the model calculation parameters that can be tuned experimentally. The spin blockade and the negative differential phenomena are investigated since the spin transport properties are studied extendedly in the case of a parallel configuration in the leads. It is concluded that the operative and functional values of the bias voltage can be determined by single phonon energy and the electron-phonon coupling values. Since all our calculations are accomplished for electron-phonon coupling equals 0.05eV. Finally, we must report the following: in the case of parallel configuration with high spin polarization, the spin heat generation equals the charge heat generation and both are relatively high where the intradot interaction has no role. While, as the spin polarization is lowered then the charge heat generation be greater than the spin heat generation when the correlation energy is relatively low.
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Fushinobu, K., A. Majumdar, and K. Hijikata. "Heat Generation and Transport in Submicron Semiconductor Devices." Journal of Heat Transfer 117, no. 1 (February 1, 1995): 25–31. http://dx.doi.org/10.1115/1.2822317.

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The reduction of semiconductor device size to the submicrometer range leads to unique electrical and thermal phenomena. The presence of high electric fields (order of 107 V/m) energizes the electrons and throws them far from equilibrium with the lattice. This makes heat generation a nonequilibrium process. For gallium arsenide (GaAs), energy is first transferred from the energized electrons to optical phonons due to strong polar coupling. Since optical phonons do not conduct heat, they must transfer their energy to acoustic phonons for lattice heat conduction. Based on the two-step mechanism with corresponding time scales, a new model is developed to study the process of nonequilibrium heat generation and transport in a GaAs metal semiconductor field effect transistor (MESFET) with a gate length of 0.2 μm. When 3 V is applied to the device, the electron temperature rise is predicted to be more than 1000 K. The effect of lattice heating on electrical characteristics of the device shows that the current is reduced due to decrease in electron mobility. The package thermal conductance is observed to have strong effects on the transient response of the device.
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Pop, E., S. Sinha, and K. E. Goodson. "Heat Generation and Transport in Nanometer-Scale Transistors." Proceedings of the IEEE 94, no. 8 (August 2006): 1587–601. http://dx.doi.org/10.1109/jproc.2006.879794.

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Pop, Eric. "MONTE CARLO TRANSPORT AND HEAT GENERATION IN SEMICONDUCTORS." Annual Review of Heat Transfer 17, N/A (2014): 385–423. http://dx.doi.org/10.1615/annualrevheattransfer.2014007694.

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Muscato, Orazio, Wolfgang Wagner, and Vincenza Di Stefano. "Heat generation in silicon nanometric semiconductor devices." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 33, no. 4 (July 1, 2014): 1198–207. http://dx.doi.org/10.1108/compel-11-2012-0327.

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Purpose – The purpose of this paper is to deal with the self-heating of semiconductor nano-devices. Design/methodology/approach – Transport in silicon semiconductor devices can be described using the Drift-Diffusion model, and Direct Simulation Monte Carlo (MC) of the Boltzmann Transport Equation. Findings – A new estimator of the heat generation rate to be used in MC simulations has been found. Originality/value – The new estimator for the heat generation rate has better approximation properties due to reduced statistical fluctuations.
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Hari, Rakesh, and Chandrasekharan Muraleedharan. "Analysis of Effect of Heat Pipe Parameters in Minimising the Entropy Generation Rate." Journal of Thermodynamics 2016 (February 3, 2016): 1–8. http://dx.doi.org/10.1155/2016/1562145.

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Heat transfer and fluid flow in the heat pipe system result in thermodynamic irreversibility generating entropy. The minimum entropy generation principle can be used for optimum design of flat heat pipe. The objective of the present work is to minimise the total entropy generation rate as the objective function with different parameters of the flat heat pipe subjected to some constraints. These constraints constitute the limitations on the heat transport capacity of the heat pipe. This physical nonlinear programming problem with nonlinear constraints is solved using LINGO 15.0 software, which enables finding optimum values for the independent design variables for which entropy generation is minimum. The effect of heat load, length, and sink temperature on design variables and corresponding entropy generation is studied. The second law analysis using minimum entropy generation principle is found to be effective in designing performance enhanced heat pipe.
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Gollahalli, S. R., J. E. Francis, and D. Varshney. "Heat Generation in Ferrous Metal Piles." Journal of Energy Resources Technology 115, no. 3 (September 1, 1993): 168–74. http://dx.doi.org/10.1115/1.2905989.

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A laboratory-scale experimental study of the basic processes and controlling parameters involved in the spontaneous heating of a pile of ferrous metal turnings during their marine transport is presented. The results indicate that the salinity of seawater, the amount of moisture coming in contact with the turnings, the surface area of turnings, the volume of container, and the bulk density of the pile affect the temperature rise in the ferrous material.
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Pop, Eric. "Heat Generation and Transport in SOI and GOI Devices." ECS Transactions 6, no. 4 (December 19, 2019): 151–57. http://dx.doi.org/10.1149/1.2728854.

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Ferhi, M., R. Djebali, F. Mebarek-Oudina, Nidal H. Abu-Hamdeh, and S. Abboudi. "Magnetohydrodynamic Free Convection Through Entropy Generation Scrutiny of Eco-Friendly Nanoliquid in a Divided L-Shaped Heat Exchanger with Lattice Boltzmann Method Simulation." Journal of Nanofluids 11, no. 1 (February 1, 2022): 99–112. http://dx.doi.org/10.1166/jon.2022.1819.

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The current paper aims to investigate numerically the magnetized conjugate heat transport in a divided L-shaped heat exchanger (HE) filled with eco-nanofluid (functionalized graphene nanoplatelet (GnPs) dispersed in water) utilizing Lattice Boltzmann technique. Experimental correlations for thermo physical proprieties of the green nanofluid are utilized to study the flow pattern and conjugate heat transport inside the divided L-shaped HE. The entropy generation is also analyzed. Results are mainly presented using streamline, isotherms, entropy generation, Bejan number and average Nusselt number for various terms such as Ra numbers, Ha numbers and temperature. The obtained findings show that the heat transport enhances via increasing Ra number. The augmentation of magnetic field strength reduces the heat transport and the generated entropy. This behavior becomes remarkable for Ra= 105. Moreover, The Bejan number is kept constant for Ra=103 for all Ha number and increasing the Ra, the Bejan number increases with Ha. Besides, the increase in temperature rises the heat transport rate and reduces the entropy generation; nevertheless, the Bejan number is kept constant for all temperature values.
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Dissertations / Theses on the topic "Heat generation and transport"

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Legault, Stephane. "Heat transport in quasicrystals." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape9/PQDD_0021/NQ55355.pdf.

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Legault, Stéphane. "Heat transport in quasicrystals." Thesis, McGill University, 1999. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=36034.

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In this thesis, we performed a detailed study of the thermal conductivity in a wide range of quasicrystals. Three systems were studied: AlPdMn, AlCuFe and AlPdRe, and the samples were in both single and polycrystalline form. A further variable was added by introducing a controlled level of defects.
At low temperatures (below 20K), the thermal conductivity is defect limited, being controlled by boundary scattering, two level systems, stacking faults and dislocations. At high temperatures (above 20K), we find the thermal conductivity is limited by intrinsic properties of the quasicrystalline structure and phonon-phonon scattering.
From fitting the thermal conductivity to a detailed model we are able to predict the maximum thermal conductivity of a perfect quasicrystal.
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Moe, Bjørn Kristian. "Heat Generation by Heat Pump for LNG Plants." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for elkraftteknikk, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-14671.

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Abstract The LNG production plant processing natural gas from the Snøhvit field outside Hammerfest in northern Norway utilizes heat and power produced locally with gas turbines. Building a new production train supplied with electricity from the power grid is being evaluated as a possible solution for reducing CO2 emissions from the plant. Buying electricity from the grid rather than producing it in a combined heat and power plant makes it necessary to find new ways to cover the heat loads at the production plant. A project thesis was written in the fall semester 2010 evaluating the possibility of generating the necessary heat with heat pumps. It was concluded that parts of the required heat could be delivered with reasonable efficiencies using heat pumps. Further, a heat pump delivering heat to the CO2-removal system was analyzed. Simulations showed that the required heat load, reaching approximately 62 MW at full production, could be delivered from a heat pump using butane as working fluid. The electrical power consumption for the compressors would be 23.3 MW, giving the heat pump a COP of 2.66. In this master thesis the heat pump suggested earlier is analyzed, focusing on identifying losses. Several possible changes that will enhance the heat pump’s efficiency are suggested. The use of other workings fluids and mixed refrigerants are analyzed as well, using the process simulation software Pro/II. The simulations indicates that the heat pump should be equipped with a flash tank at middle pressure, thereby reducing throttling losses and required mass flows through the evaporators. In addition, the suction gas should be overheated as much as possible. Using mixed refrigerants lowers the efficiency of the heat pump. Finally, two new systems are suggested: One with butane as workings fluid and one with pentane, both with flash tank at middle pressure and superheated suction gas. The pentane-system gives the highest system COP, but requires much bigger compressors than the butane-system. The table shows the most important results. Working fluid Electrical power consumption [MW] Volume flow suction gas [m3/h] COP Butane (C4H10) 18.6 55000 3.35 Pentane (C5H12) 17.5 150000 3.54 The power grid electricity is assumed to have been produced without any CO2 emissions. Covering the heat required by the CO2 removal system with a gas fired furnace would generate CO2 emissions of approximately 120,000 tons per year. Heat pumps are a good solution because they deliver relatively cheap heat without these CO2 emissions.
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Shukla, Nitin. "Heat Transport across Dissimilar Materials." Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/27820.

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All interfaces offer resistance to heat transport. As the size of a device or structure approaches nanometer lengthscales, the contribution of the interface thermal resistance often becomes comparable to the intrinsic thermal resistance offered by the device or structure itself. In many microelectronic devices, heat has to transfer across a metal-nonmetal interface, and a better understanding about the origins of this interface thermal conductance (inverse of the interface thermal resistance) is critical in improving the performance of these devices. In this dissertation, heat transport across different metal-nonmetal interfaces are investigated with the primary goal of gaining qualitative and quantitative insight into the heat transport mechanisms across such interfaces. A time-domain thermoreflectance (TDTR) system is used to measure the thermal properties at the nanoscale. TDTR is an optical pump-probe technique, and it is capable of measuring thermal conductivity, k, and interface thermal conductance, G, simultaneously. The first study examines k and G for amorphous and crystalline Zr47Cu31Al13Ni9 metallic alloys that are in contact with poly-crystalline Y2O3. The motivation behind this study is to determine the relative importance of energy coupling mechanisms such as electron-phonon or phonon-phonon coupling across the interface by changing the material structure (from amorphous to crystalline), but not the composition. From the TDTR measurements k=4.5 W m-1 K-1 for the amorphous metallic glass of Zr47Cu31Al13Ni9, and k=5.0 W m-1 K-1 for the crystalline Zr47Cu31Al13Ni9. TDTR also gives G=23 MW m-2 K-1 for the metallic glass/Y2O3 interface and G=26 MW m-2 K-1 for the interface between the crystalline Zr47Cu31Al13Ni9 and Y2O3. The thermal conductivity of the poly-crystalline Y2O3 layer is found to be k=5.0 W m-1 K-1. Despite the small difference between k and G for the two alloys, the results are repeatable and they indicate that the structure of the alloy plays a role in the electron-phonon coupling and interface conductance. The second experimental study examines the effect of nickel nanoparticle size on the thermal transport in multilayer nanocomposites. These nanocomposites consist of five alternating layers of nickel nanoparticles and yttria stabilized zirconia (YSZ) spacer layers that are grown with pulsed laser deposition. Using TDTR, thermal conductivities of k=1.8, 2.4, 2.3, and 3.0 W m-1 K-1 are found for nanocomposites with nickel nanoparticle diameters of 7, 21, 24, and 38 nm, respectively, and k=2.5 W m-1 K-1 for a single 80 nm thick layer of YSZ. The results indicate that the overall thermal conductivity of these nanocomposites is strongly influenced by the Ni nanoparticle size and the interface thermal conductance between the Ni particles and the YSZ matrix. An effective medium theory is used to estimate the lower limits for the interface thermal conductance between the nickel nanoparticles and the YSZ matrix (G>170 MW m-2 K-1), and the nickel nanoparticle thermal conductivity.
Ph. D.
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Sato, Ken-ichi. "Next Generation Transport Network Architecture." IEEE, 2010. http://hdl.handle.net/2237/14451.

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Rivera, Gomez Franco Wilfrido. "Heat transformer technology and steam generation." Thesis, University of Salford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360445.

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Nazari, Ashkan. "HEAT GENERATION IN LITHIUM-ION BATTERIES." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1469445487.

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Beardo, Ricol Albert. "Generalized Hydrodynamic Heat Transport in Semiconductors." Doctoral thesis, Universitat Autònoma de Barcelona, 2021. http://hdl.handle.net/10803/673590.

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La tesis presenta una descripció unificadora d'una varietat d'experiments de transport tèrmic a la micro i nano escala en semiconductors com el silici o el germani. S'utilitza un model de transport de calor hidrodinàmic per predir la resposta no difusiva de sistemes complexes en situacions de rellevància tecnològica, com el procés de refredament d'un component electrònic alliberant calor cap a un substrat semiconductor. El model no utilitza paràmetres d'ajust en funció de la geometria, sinó que utilitza paràmetres calculats des de primers principis. Els efectes de mida petita o alta freqüència es capturen a través de condicions de contorn específiques i, per tant, el model és una eina útil pel disseny de dispositiu micro electrònics. Degut a que la descripció hidrodinàmics pel silici no és el mètode convencional, en aquesta tesis es posa especial èmfasis en determinar l'aplicabilitat del model en múltiples experiments de manera unificadora. Com a resultat, s'identifiquen fenòmens no difusius com la propagació del segon so en camps tèrmics fluctuants en germani o múltiples temps de relaxació en l'evolució tèrmica d'escalfadors nano estructurats en silici. A més, la descripció hidrodinàmica es compara amb altres models moderns per descriure els mateixos experiments, i es proporciona un resum de les eines teòriques necessàries (la termodinàmica de no equilibri i la teoria cinètica). Utilitzant les evidències experimentals que s'aporten, es conclou que el model hidrodinàmic té capacitat predictiva de la resposta tèrmica de materials com el silici a la nano escala dins d'un cert rang d'aplicabilitat.
Ésta tesis presenta una descripción unificadora de una variedad de experimentos de transporte térmico a la micro y nano escala en semiconductores como el silicio o el germanio. Se utilitza un modelo de transporte de calor hidrodinámico para predecir la respuesta no difusiva de sistemas complejos en situacions de relevancia tecnológica, como el proceso de enfriamento de un componente electrónico liberando calor hacia un sustrato semiconductor. El modelo no utilitza parámetros de ajuste en función de la geometría, sinó que utiliza parámetros calculados des de primeros principios. Los efectos de tamaño reducido o alta frecuencia se capturan a través de condiciones de contorno específicas y, por tanto, el modelo es una herramienta útil para el diseño de dispositivos micro electrónicos. Dado que la descripción hidrodinámica para el silicio no es el método convencional, en ésta tesis se presta especial atención a determinar la aplicabilidad del modelo en múltiples experimentos de forma unificadora. Como resultado, se identifican fenómenos no difusivos como la propagación de segundo sonido en campos térmicos fluctuantes en germanio, o múltiples tiempos de relajación en la evolución térmica de calentadores nano estructurados en silicio. Además, la descripción hidrodinámica se compara con otros modelos modernos para describir los mismos experimentos, y se proporciona un resumen de las herramientas teóricas necesarias (la termodinámica de no equilibrio y la teoria cinética). Utilizando las evidencias experimentales que se aportan, se concluye que el modelo hidrodinámico tiene capacidad predictiva de la respuesta térmica de materiales como el silicio a la nano escala dentro de un cierto rango de aplicabilidad.
This thesis presents a unifying description of a variety of experiments on micro- and nano-scale heat transport in semiconductors like silicon or germanium. A hydrodynamic-like heat transport model is used to predict the non-diffusive thermal response of complex systems in technologically relevant situations, like the process of energy release from nanostructured heat sources towards a semiconductor substrate. The model does not use geometry-dependent or fitted parameters, but use intrinsic material properties that can be calculated from first principles. Small-size and high-frequency effects are captured through the use of specific boundary conditions, thus resulting in a practical tool for complex microelectronic device design. Since hydrodynamic modeling is not the state-of-the-art approach to describe standard semiconductors like silicon, special care is devoted to quantitatively determine the applicability of the model, and multiple experiments using different techniques are considered and studied in a unifying way. As a result, previously unreported non-Fourier phenomena in materials like silicon or germanium is identified and demonstrated (e.g. second sound in rapidly varying thermal fields or multiple decay times characterizing the evolution of nano-structured heaters). Furthermore, the hydrodynamic description is compared with alternative modern frameworks describing size and frequency effects in semiconductor heat transport, and a summarized overview of the theoretical background, namely non-equilibrium thermodynamics and kinetic theory, is presented. In light of the extensive experimental evidence provided, this thesis demonstrate the predictive capability of hydrodynamic-like thermal transport modeling in semiconductors within a certain range of applicability that is well beyond the diffusive regime.
Universitat Autònoma de Barcelona. Programa de Doctorat en Física
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Niemi, Daniel, and Joel Hambraeus. "Heat Transport in Inhomogeneous Harmonic Chains." Thesis, KTH, Skolan för teknikvetenskap (SCI), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-275699.

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It is still to this day a challenge for theoretical physicists to derive Fourier’s law from microscopic models. Motivated by this, we study in this thesis the thermal conduction properties of harmonic chains. A semi-analytical method and simulation are used to find that on average the conduction through harmonic chains resembles Fourier like conduction when impurities of the form k_i=kw_i and 1/m_i=1/m*w_i are introduced, where k_i and m_i are the spring constants and masses of the chain and w_i are weights drawn from a random distribution. A few of these distributions are studied in detail, with similar results.Also the classical field theory limit of this model is studied. It is shown by analytical means that heat is transported diffusively in this model when impurities are introduced, whereas the transport is completely ballistic in the absence of impurities.
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Visarraga, Darrin Bernardo. "Heat transport models with distributed microstructure." Access restricted to users with UT Austin EID, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3036605.

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Books on the topic "Heat generation and transport"

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1945-, Mareschal Jean-Claude, ed. Heat generation and transport in the Earth. Cambridge: Cambridge University Press, 2010.

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Mihaylov, Vyacheslav, Elena Sotnikova, and Nina Kalpina. Eco-friendly air protection systems for motor transport facilities. ru: INFRA-M Academic Publishing LLC., 2022. http://dx.doi.org/10.12737/1093106.

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The textbook considers the issue of assessing the heat and humidity state of air in the processes of its processing in various systems, provides requirements for air protection means, taking into account their environmental friendliness, shows ways of energy saving in cooling, heating and year-round air conditioning systems, as well as when protecting the atmosphere from harmful emissions. The way of energy saving with individual thermal protection of the operator by means of local cooling during air treatment in an irrigated intensified nozzle is shown and recommendations for reducing its material consumption are developed. The method and means of reducing the toxicity of emissions of tractor internal combustion engines during its operation in rooms of limited volume by water vapor humidification of the fuel-air mixture are demonstrated. The ways of noise reduction of air protection systems are shown. Meets the requirements of the federal state educational standards of higher education of the latest generation. It is intended for students studying in the specialties "Ground transport and technical means", "Operation of transport and technological machines and complexes", "Power engineering", "Ground transport and technological complexes", "Refrigeration, cryogenic equipment and life support systems", "Technosphere safety", "Ecology and nature management".
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Ellanti, Manohar Naidu, Lakshmi G. Raman, Steven Scott Gorshe, and Wayne D. Grover. Next Generation Transport Networks. Boston, MA: Springer US, 2005. http://dx.doi.org/10.1007/b104435.

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Ohadi, Michael, Kyosung Choo, Serguei Dessiatoun, and Edvin Cetegen. Next Generation Microchannel Heat Exchangers. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-0779-9.

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Ohadi, Michael. Next Generation Microchannel Heat Exchangers. New York, NY: Springer New York, 2013.

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1935-, Tien Chang L., Majumdar Arunava, and Gerner F. M, eds. Microscale energy transport. Washington, D.C: Taylor & Francis, 1998.

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Leonard, Sagis, and Oh Eun-Suok, eds. Interfacial transport phenomena. 2nd ed. New York: Springer, 2007.

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Meeting, American Society of Mechanical Engineers Winter. Convective transport. New York, N.Y: American Society of Mechanical Engineers, 1987.

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Sellitto, Antonio, Vito Antonio Cimmelli, and David Jou. Mesoscopic Theories of Heat Transport in Nanosystems. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-27206-1.

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Acosta, Jose Luis. Porous media: Heat & mass transfer, transport & mechanics. Hauppauge: Nova Science Publishers, 2009.

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Book chapters on the topic "Heat generation and transport"

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Zohuri, Bahman, and Patrick McDaniel. "Heat Transport System Thermal Hydraulics." In Combined Cycle Driven Efficiency for Next Generation Nuclear Power Plants, 59–83. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-70551-4_4.

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Zohuri, Bahman. "Heat Transport System Thermal Hydraulics." In Combined Cycle Driven Efficiency for Next Generation Nuclear Power Plants, 61–85. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-15560-9_4.

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Teske, Sven, and Thomas Pregger. "OECM 1.5 °C Pathway for the Global Energy Supply." In Achieving the Paris Climate Agreement Goals, 293–313. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-99177-7_12.

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AbstractThis chapter summarizes all the calculated energy demands for the industry, service, transport, and building sectors. The supply side results for the OECM 1.5 °C scenario are documented. Electricity generation and the power generation required globally are provided by technology, together with the corresponding renewable and fossil energy shares. A detailed overview of the heat demand by sector, the heat temperature levels required for industrial process heat, and the OECM 1.5 °C heat supply trajectories by technology are presented, in both total generation and installed capacities. The calculated global final and primary energy demands, carbon intensities by source, and energy-related CO2 emissions by sector are given. Finally, the chapter provides the global carbon budgets by sector.
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Huber, Heiko, and Ulvi Arslan. "Characterization of Heat Transport Processes in Geothermal Systems." In Progress in Sustainable Energy Technologies: Generating Renewable Energy, 551–65. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-07896-0_33.

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Zahedi, Polad. "Pickering Generating Station Primary Heat Transport Pressure Control Analysis During Boiler Steam Relief Valve Testing." In Proceedings of The 20th Pacific Basin Nuclear Conference, 167–80. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-2317-0_17.

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Wallis, Tania, Greig Paul, and James Irvine. "Organisational Contexts of Energy Cybersecurity." In Computer Security. ESORICS 2021 International Workshops, 384–402. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-95484-0_22.

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AbstractThe energy system is going through huge transformation to integrate distributed renewable generation and to achieve the goals of net-zero carbon emissions. This involves a significant adjustment to how the system is controlled and managed, with increasing digitalisation of technology and growing complexities across interconnected systems. Traditionally electricity networks adjusted their supply of energy in response to changes in demand. The future energy system will require more flexible demand to be able to use or store energy when renewables are generating. This change is exacerbated by additional demand for electricity for heat and transport uses.Utility organisations hold responsibility for securing their networks and assuring the supply of electricity. This paper describes a full investigation of cybersecurity issues and concerns for utilities. This industry review was carried out to create a clear organisational context for the ongoing design of cybersecurity improvements. The assessment of potential impact and consequences of cyber-attack is recommended to direct necessary preparations towards protecting essential functions and processes. Improving resilience across interdependent actors is discussed and resilience measures suggested to guide the contributions of different actors towards whole system resilience.
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Hondzo, Midhat, and Heinz G. Stefan. "Heat Transport." In Water Science and Technology Library, 189–218. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-015-8664-1_6.

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Böttcher, Norbert, Guido Blöcher, Mauro Cacace, and Olaf Kolditz. "Heat Transport." In Thermo-Hydro-Mechanical-Chemical Processes in Porous Media, 89–105. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-27177-9_4.

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Dobkin, Daniel M., and Michael K. Zuraw. "Heat Transport." In Principles of Chemical Vapor Deposition, 69–93. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-0369-7_4.

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Hurle, Donald T. J. "Heat Transport." In Crystal Pulling from the Melt, 40–48. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-78208-4_5.

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Conference papers on the topic "Heat generation and transport"

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Kong, Jing, Shenghao Wu, Huachao Yang, and Zheng Bo. "ELECTRON AND ION TRANSPORT WITHIN THE HEAT GENERATION OF GRAPHENE-BASED SUPERCAPACITORS." In International Heat Transfer Conference 16. Connecticut: Begellhouse, 2018. http://dx.doi.org/10.1615/ihtc16.ecl.022731.

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Kishimoto, Masashi, Hiroshi Iwai, Motohiro Saito, and Hideo Yoshida. "Quantitative Evaluation of Transport Properties of SOFC Porous Anode and Their Effect on the Power Generation Performance." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22495.

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The three-dimensional microstructure of a solid oxide fuel cell (SOFC) anode is directly observed using a focused ion beam and scanning electron microscope (FIB-SEM) technique. Microstructural parameters, which are closely related to transport phenomena in porous materials, are quantitatively evaluated by a random-walk-based diffusion simulation. Numerical simulation of the SOFC anode with the obtained microstructural parameters is also performed, and the result is in good agreement with the experimental counterparts. Combined with a sensitivity analysis for the SOFC performance, the relationships between the microstructural parameters and the power generation performance are discussed and guidelines for optimizing the anode microstructure are proposed.
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Zeng, Taofang. "Direct Power Generation Using Tunneling and Thermionic Emission." In ASME 2004 Heat Transfer/Fluids Engineering Summer Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/ht-fed2004-56724.

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Thermionic emission in vacuum could be a highly efficient cooler or power generator if the work function, the minimum work for electrons to go into vacuum, is around 0.3–0.4 eV for heat source at a temperature below 500C [Mahan, 1994]. Unfortunately, the work function of existing materials is currently above 1 eV. Theoretical and experimental studies have shown that the work function can be reduced to 0.3–0.4 eV if the distance between the two electrodes (cathode and anode) of the thermionic emission cooler/power generator is below 10 nm [Hishinuma, et al, 2001, 2003]. At this nanometer scale, electron transport between the two electrodes takes two paths: electron tunneling and thermionic emission. The combined physical processes result in a desired work function. However, maintaining a nanometer gap for two parallel plates within an area larger than 1 cm2 is a daunting task, if not impossible, especially if the power generator is mounted on a moving or vibrating device. Even a slight vibration or thermal expansion of the two plates (electrodes) could cause direct contact between the two plates (electrodes), and thus shorten the circuits. Thus vacuum thermionic power generator based on difficult to make and to operate [Tavkhelidze, et al., 2002]. In this study, we propose to use a solid insulating spacer for preventing the shortening and for feasibility of manufacturing. The spacer is less than 5nm, and electron transport as thermionic emission and tunneling concurrently. In this study, we first investigate electron and phonon transport in single-layer (spacer) double heterostructures by including the tunneling effects. It is found that single-layer generator can have a high efficiency, but small power intensity due to the small temperature difference between the two electrodes. We then investigate the efficiency of multilayer-layer power generator. Calculations show that the solid power generator operating at a temperature below 500°C, can have an efficiency of larger than 40% of the Carnot efficiency.
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Cai, Qingjun, Reh-Lin Chen, and Chung-Lung Chen. "An Investigation of Evaporation, Boiling, and Heat Transport Performance in Pulstating Heat Pipe." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-33334.

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Pulsating heat pipe (PHP) is a latest development in heat pipe technology. In this paper, evaporation and boiling phenomena are investigated, and liquid heat transport performance in a PHP is measured at different fill ratio as well. The observation results show that phase change in the evaporator may occur by two different mechanisms: 1) evaporation and boiling in thin liquid film on the evaporator wall, 2) generation and collapse of tiny bubbles suspended in the liquid slug. Meanwhile, the temperature measurement indicates that temperature gradient between the evaporator and the condenser is related to liquid latent heat, density, viscosity, and mass filled in.
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Bright, T. J., and Z. M. Zhang. "Entropy Generation in Thin Films Evaluated From Phonon Radiative Transport." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-12388.

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One of the approaches for micro/nanoscale heat transfer is to use the Boltzmann transport equation, which reduces to the equation of phonon radiative transfer under the relaxation time approximation. Transfer and generation of entropy are processes inherently associated with thermal energy transport, yet little has been done to analyze entropy generation in solids at length scales comparable with or smaller than the mean free path of heat carriers. This work extends the concept of radiation entropy in a participating medium to phonon radiation, thus providing a general theory of entropy generation that is applicable to both large and small length scales. The conventional formula for entropy generation in heat diffusion can be derived under the local equilibrium assumption. Furthermore, the phonon brightness temperature is introduced to describe the nature of nonequilibrium heat conduction. A fundamental understanding of the entropy generation processes will broaden the knowledge of heat transport in solids, which is particularly important for thermal analysis in nanoelectronics.
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He, Ya-Ling, Zheng Miao, and Wen-Quan Tao. "Modeling of Heat Transport in a Direct Methanol Fuel Cell With Anisotropic Gas Diffusion Layers." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22102.

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A non-isothermal two-dimensional two-phase numerical model is developed in this paper to investigate the heat generation and transport processes in a direct methanol fuel cell with anisotropic gas diffusion layers (GDLs). Thermal contact resistances at the GDL/CL (catalyst layer) and GDL/Rib interfaces, and the deformation of GDLs are considered together with the inherent anisotropy of the GDL. Latent heat effects due to condensation/evaporation of water and methanol between liquid and gas phases are also taken into account. Formulation of the two-phase mass transport across the membrane electrode assembly (MEA) is mainly based on the classical multiphase flow theory in the porous media. The numerical results show that the overall heat flux in MEA is mainly contributed to heat generation in anode and cathode CLs. And the three anisotropic factors of the GDLs, including the inherent anisotropy, the spatially varying contact resistances, and the deformation of GDLs, have a strong impact on the heat transport processes in the DMFC by altering the distribution of temperature across the MEA.
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Hoang, Triem T., Tamara A. O’Connell, Jentung Ku, C. Dan Butler, and Theodore D. Swanson. "Miniature Loop Heat Pipes for Electronic Cooling." In ASME 2003 International Electronic Packaging Technical Conference and Exhibition. ASMEDC, 2003. http://dx.doi.org/10.1115/ipack2003-35245.

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Thermal management of modern electronics has become a problem of significant interest due to the demand for power and reduction in packaging size. Requirements of next-generation microprocessors in terms of power dissipation and heat flux will certainly outgrow the capability of today’s thermal control technology. LHPs, like conventional heat pipes, are capillary pumped heat transport devices. They contain no mechanical moving part to wear out or require electrical power to operate. But unlike heat pipes, LHPs possess much higher heat transport capabilities enabling them to transport large amounts of heat over long distances in small flexible lines for heat rejection. In fact, a miniature ammonia LHP developed for a NASA space program is capable of transporting 60W over a distance of 1 meter in 1/16”O.D. stainless steel tubing. Therefore, miniature LHPs using water as the working fluid are excellent candidates to replace heat pipes as heat transports in electronic cooling systems. However, a number of operational issues regarding system performance, cost, and integration/packaging must be resolved before water LHPs can become a viable option for commercial electronics.
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Lu, Yuan, Joseph Katz, and Andrea Prosperetti. "Generation and Transport of Bubbles in Intense Ultrasonic Fields." In ASME 2012 Fluids Engineering Division Summer Meeting collocated with the ASME 2012 Heat Transfer Summer Conference and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/fedsm2012-72286.

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This paper examines cavitation phenomena generated by a 500 kHz, high-intensity focused ultrasonic (HIFU) beam, with pressure amplitude in the focal zone of up to 19 atm, in quiescent water and at the exit of a jet. The pressure field and cavitation are visualized using high-speed digital in-line holography. The spatial distribution of the acoustic pressure is determined form the variations in the water density and refractive index. A partial standing wave is generated by the reflection of the sound from the wall of the test chamber. Several cavitation phenomena are observed. At low to moderate sound levels, bubbly layers form in the pressure nodes of the standing wave, in the periphery of the focal zone. At high sound levels, clouds of vapor bubbles are generated in the antinodes, and migrate in the direction of the acoustic beam at speeds in the 1–4 m/s range. Both the cloud size and velocity oscillate, with the size peaking in the nodes and the velocity in the antinodes. A model for the cloud dynamics shows that the periodic velocity variation is dominated by the balance between the primary Bjerknes force and the drag. The secondary Bjerknes force involving interactions among the bubbles within the cloud is a likely cause for the size oscillations.
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Wojtala, Malgorzata E., Ferran Brosa Planella, Alana A. Zulke, Harry E. Hoster, and David A. Howey. "Investigating changes in transport, kinetics and heat generation over NCA/Gr-SiOx battery lifetime." In 2022 IEEE Vehicle Power and Propulsion Conference (VPPC). IEEE, 2022. http://dx.doi.org/10.1109/vppc55846.2022.10003425.

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Dragunov, Alexey, Eugene Saltanov, Igor Pioro, Glenn Harvel, and Brian Ikeda. "Study on Primary and Secondary Heat-Transport Systems for Sodium-Cooled Fast Reactor." In 2013 21st International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icone21-16014.

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One of the current engineering challenges is to design next generation (Generation IV) Nuclear Power Plants (NPPs) with significantly higher thermal efficiencies (43–55%) compared to those of current NPPs to match or at least to be close to the thermal efficiencies reached at fossil-fired power plants (55–62%). The Sodium-cooled Fast Reactor (SFR) is one of the six concepts considered under the Generation IV International Forum (GIF) initiative. The BN-600 reactor is a sodium-cooled fast-breeder reactor built at the Beloyarsk NPP in Russia. This concept is the only one from the Generation IV nuclear-power reactors, which is actually in operation (since 1980’s). At the secondary side, it uses a subcritical-pressure Rankine-steam cycle with heat regeneration. The reactor generates electrical power in the amount of 600 MWel. The reactor core dimensions are 0.75 m (height) by 2.06 m (diameter). The UO2 fuel enriched to 17–26% is utilized in the core. There are 2 loops (circuits) for sodium flow. For safety reasons, sodium is used both in the primary and the intermediate circuits. Therefore, a sodium-to-sodium heat exchanger is used to transfer heat from the primary loop to the intermediate one. In this work major parameters of the reactor are listed. The actual scheme of the power-conversion heat-transport system is presented; and the results of the calculation of thermal efficiency of this scheme are analyzed. Details of the heat-transport system, including parameters of the sodium-to-sodium heat exchanger and main coolant pump, are presented. In this paper two possibilities for the SFR in terms of the power-conversion cycle are investigated: 1. a subcritical-pressure Rankine-steam cycle through a heat exchanger (current approach in Russian and Japanese power reactors); 2. a supercritical-pressure CO2 Brayton gas-turbine cycle through a heat exchanger (US approach). With the advent of modern super-alloys, the Rankine-steam cycle has progressed into the supercritical region of the coolant and is generating thermal efficiencies into the mid 50% range. Therefore, the thermal efficiency of a supercritical Rankine-steam cycle is also briefly discussed in this paper. According to GIF, the Brayton gas-turbine cycle is under consideration for future nuclear power reactors. The supercritical-CO2 cycle is a new approach in the Brayton gas-turbine cycle. Therefore, dependence of the thermal efficiency of this SC CO2 cycle on inlet parameters of the gas turbine is also investigated.
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Reports on the topic "Heat generation and transport"

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Bell, Lon E., Ramesh Koripella, and Robert T. Collins. Increased Efficiency Thermoelectric Generator With Convective Heat Transport. Fort Belvoir, VA: Defense Technical Information Center, February 2011. http://dx.doi.org/10.21236/ada538133.

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Williams, M. L., A. Yuecel, and S. Nadkarny. DOS-HEATING6: A general conduction code with nuclear heat generation derived from DOT-IV transport calculations. Office of Scientific and Technical Information (OSTI), May 1988. http://dx.doi.org/10.2172/6928640.

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Guidati, Gianfranco, and Domenico Giardini. Joint synthesis “Geothermal Energy” of the NRP “Energy”. Swiss National Science Foundation (SNSF), February 2020. http://dx.doi.org/10.46446/publication_nrp70_nrp71.2020.4.en.

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Near-to-surface geothermal energy with heat pumps is state of the art and is already widespread in Switzerland. In the future energy system, medium-deep to deep geothermal energy (1 to 6 kilometres) will, in addition, play an important role. To the forefront is the supply of heat for buildings and industrial processes. This form of geothermal energy utilisation requires a highly permeable underground area that allows a fluid – usually water – to absorb the naturally existing rock heat and then transport it to the surface. Sedimentary rocks are usually permeable by nature, whereas for granites and gneisses permeability must be artificially induced by injecting water. The heat gained in this way increases in line with the drilling depth: at a depth of 1 kilometre, the underground temperature is approximately 40°C, while at a depth of 3 kilometres it is around 100°C. To drive a steam turbine for the production of electricity, temperatures of over 100°C are required. As this requires greater depths of 3 to 6 kilometres, the risk of seismicity induced by the drilling also increases. Underground zones are also suitable for storing heat and gases, such as hydrogen or methane, and for the definitive storage of CO2. For this purpose, such zones need to fulfil similar requirements to those applicable to heat generation. In addition, however, a dense top layer is required above the reservoir so that the gas cannot escape. The joint project “Hydropower and geo-energy” of the NRP “Energy” focused on the question of where suitable ground layers can be found in Switzerland that optimally meet the requirements for the various uses. A second research priority concerned measures to reduce seismicity induced by deep drilling and the resulting damage to buildings. Models and simulations were also developed which contribute to a better understanding of the underground processes involved in the development and use of geothermal resources. In summary, the research results show that there are good conditions in Switzerland for the use of medium-deep geothermal energy (1 to 3 kilometres) – both for the building stock and for industrial processes. There are also grounds for optimism concerning the seasonal storage of heat and gases. In contrast, the potential for the definitive storage of CO2 in relevant quantities is rather limited. With respect to electricity production using deep geothermal energy (> 3 kilometres), the extent to which there is potential to exploit the underground economically is still not absolutely certain. In this regard, industrially operated demonstration plants are urgently needed in order to boost acceptance among the population and investors.
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Cain, P. Heat generation of bagged 'Astracem'. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1986. http://dx.doi.org/10.4095/304956.

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Keolian, Robert M., and Anthony A. Atchley. Basic Research in Thermoacoustic Heat Transport. Fort Belvoir, VA: Defense Technical Information Center, September 2003. http://dx.doi.org/10.21236/ada417390.

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Atchley, Anthony A. Basic Research in Thermoacoustic Heat Transport. Fort Belvoir, VA: Defense Technical Information Center, June 1996. http://dx.doi.org/10.21236/ada310791.

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Kirby, James T., and Fengyan Shi. Generation, Transport and Fate of Surfzone Bubbles. Fort Belvoir, VA: Defense Technical Information Center, January 2007. http://dx.doi.org/10.21236/ada514806.

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Dr. Kumar Sridharan, Dr. Mark Anderson, Dr. Michael Corradini, Dr. Todd Allen, Luke Olson, James Ambrosek, and Daniel Ludwig. Molten Salt Heat Transport Loop: Materials Corrosion and Heat Transfer Phenomena. Office of Scientific and Technical Information (OSTI), July 2008. http://dx.doi.org/10.2172/934785.

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Dyer, R. B., and A. P. Shreve. Sum frequency generation studies of membrane transport phenomena. Office of Scientific and Technical Information (OSTI), November 1998. http://dx.doi.org/10.2172/674919.

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Leigh, R. W., and M. Piraino. Increased use of reject heat from electric generation. Office of Scientific and Technical Information (OSTI), February 1994. http://dx.doi.org/10.2172/10137881.

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