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Dissertations / Theses on the topic 'Low grade heat'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Sansom, Robert. "Decarbonising low grade heat for low carbon future." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/25503.

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More energy is consumed in the UK for heat than either transport or electricity and yet until recently little attention has been given to decarbonising heat to meet the UK's 2050 greenhouse gas targets. The challenges are immense as over 80% of households in the UK use gas for space and water heating. To achieve the UK's greenhouse gas targets will necessitate heat to be almost completely decarbonised and will thus require a transition from gas for heating to a low carbon alternative. However, there is a lack of consensus over which low carbon heat technologies householders should be encourage

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2

Gude, Veera Gnaneswar. "Desalination using low grade heat sources." access full-text online access from Digital Dissertation Consortium, 2007. http://libweb.cityu.edu.hk/cgi-bin/er/db/ddcdiss.pl?3296129.

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3

Li, Chennan. "Innovative Desalination Systems Using Low-grade Heat." Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4126.

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Water and energy crises have forced researchers to seek alternative water and energy sources. Seawater desalination can contribute towards meeting the increasing demand for fresh water using alternative energy sources like low-grade heat. Industrial waste heat, geothermal, solar thermal, could help to ease the energy crisis. Unfortunately, the efficiency of the conventional power cycle becomes uneconomically low with low-grade heat sources, while, at the same time, seawater desalination requires more energy than a conventional water treatment process. However, heat discarded from low-grade hea

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4

Kishore, Ravi Anant. "Low-grade Thermal Energy Harvesting and Waste Heat Recovery." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/103650.

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Low-grade heat, either in the form of waste heat or natural heat, represents an extremely promising source of renewable energy. A cost-effective method for recovering the low-grade heat will have a transformative impact on the overall energy scenario. Efficiency of heat engines deteriorates with decrease in hot-side temperature, making low-grade heat recovery complex and economically unviable using the current state-of-the-art technologies, such as Organic Rankine cycle, Kalina cycle and Stirling engine. In this thesis, a fundamental breakthrough is achieved in low-grade thermal energy harvest

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5

Hedström, Sofia. "Thermal energy recovery of low grade waste heat in hydrogenation process." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-32335.

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The waste heat recovery technologies have become very relevant since many industrial plants continuously reject large amounts of thermal energy during normal operation which contributes to the increase of the production costs and also impacts the environment. The simulation programs used in industrial engineering enable development and optimization of the operational processes in a cost-effective way. The company Chematur Engineering AB, which supplies chemical plants in many different fields of use on a worldwide basis, was interested in the investigation of the possibilities for effective wa

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6

Lee, Dongwook Ph D. Massachusetts Institute of Technology. "Low-grade heat conversion into electricity by thermoelectric and electrochemical systems." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/120186.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2018.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references.<br>Developing cost effective technologies that convert low-grade heat into electricity is essential to meet the increasing demand for renewable energy systems. Thermoelectric and recently emergent electrochemical heat conversion devices are

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7

GAROFALO, ERIK. "Energy harvesting of low-grade waste heat with colloid based technology." Doctoral thesis, Politecnico di Torino, 2022. https://hdl.handle.net/11583/2972876.

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8

Soleimanikutanaei, Soheil. "Modelling, Design, and Optimization of Membrane based Heat Exchangers for Low-grade Heat and Water Recovery." FIU Digital Commons, 2018. https://digitalcommons.fiu.edu/etd/3921.

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Transport Membrane Condenser (TMC) is an innovative technology based on the property of a nano-scale porous material which can extract both waste heat and water from exhaust gases. This technology tremendously improves the efficiency of boilers and gas/coal combustors by lowering waste heat and increasing water recovery. Contaminants in the flue gases, such as CO2, O2, NOx, and SO2 are inhibited from passing through the membrane by the membrane’s high selectivity. The condensed water through these tubes is highly pure and can be used as the makeup water for many industrial applications. The go

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9

StuÌˆrzebecher, Wolfgang. "Absorption cooling from low grade heat sources in the range 10kW - 100kW." Thesis, Sheffield Hallam University, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.442471.

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10

Chen, Huijuan. "The Conversion of Low-Grade Heat into Power Using Supercritical Rankine Cycles." Scholar Commons, 2010. http://scholarcommons.usf.edu/etd/3447.

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Low-grade heat sources, here defined as below 300 ºC, are abundantly available as industrial waste heat, solar thermal, and geothermal, to name a few. However, they are under-exploited for conversion to power because of the low efficiency of conversion. The utilization of low-grade heat is advantageous for many reasons. Technologies that allow the efficient conversion of low-grade heat into mechanical or electrical power are very important to develop. This work investigates the potential of supercritical Rankine cycles in the conversion of low-grade heat into power. The performance of supercri

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11

Meyer, Adriaan Jacobus. "Steam jet ejector cooling powered by low grade waste or solar heat." Thesis, Stellenbosch : University of Stellenbosch, 2006. http://hdl.handle.net/10019.1/2012.

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Thesis (MScEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 2006.<br>A small scale steam jet ejector experimental setup was designed and manufactured. This ejector setup is of an open loop configuration and the boiler can operate in the temperature range of Tb = 85 °C to 140 °C. The typical evaporator liquid temperatures range from Te = 5 °C t o 10 °C while the typical water cooled condenser presure ranges from Pc = 1 . 70 kPa t o 5. 63 kPa (Tc = 15 °C to 35 °C). The boiler is powered by by two 4kW electric elements, while a 3kW electric element simulates the cooling

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12

Solanki, Roochi. "Modelling of a two-phase thermofluidic oscillator for low-grade heat utilisation." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/24563.

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The Non-Inertive-Feedback Thermofluidic Engine (NIFTE) is a two-phase thermofluidic oscillator which, by means of persistent periodic thermal-fluid oscillations when placed across a steady temperature difference, is capable of utilising low-grade (i.e., low temperature) heat to induce a fluid motion. Innovative devices which comprise no or few moving parts and that can operate utilising low-grade heat for fluid pumping and/or pressurisation are currently under development based on the NIFTE concept to: (i) understand the fundamental principle of operation of this novel technology; (ii) constru

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13

Al-Kharabsheh, Saleh A. "Theoretical and experimental analysis of water desalination system using low grade solar heat." [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0000982.

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14

Albatati, Faisal Ali S. "Investigation of environmentally friendly power generation systems for low-grade waste heat recovery." Thesis, University of Nottingham, 2015. http://eprints.nottingham.ac.uk/28990/.

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From the point of view of energy importance and the environmental impacts associated with conventional energy production methods, and for the purpose of low-grade waste heat recovery, this thesis demonstrates an investigative approach to develop and test a novel, environmentally friendly small-scale Rankine based power generation prototype system. To fulfil the aim, a range of systems of different technologies, and employing different working fluids were investigated to identify the most efficient, cost-effective system for the application. These systems are the absorption power generation sys

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15

OBI, JOHN BESONG. "THEORETICAL AND EXPERIMENTAL ANALYSES OF MICRO ORC SYSTEMS FOR LOW GRADE HEAT SOURCES." Doctoral thesis, Università degli Studi di Trieste, 2017. http://hdl.handle.net/11368/2908159.

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The growing cost for energy production and distribution as well as problems related to environmental pollution have motivated the increasing interest in the research of alternative solutions and, in particular, innovative technologies capable of compromising eﬃcient use of energy, production cost, optimization and guaranteeing environmental sustainability. One of the promising technologies suitable for waste heat recovery and low grade heat is the Organic Rankine Cycle (ORC). ORC’s oﬀer some advantages such as: reliability, safety, noise, emissions and ﬂexibility. The work presented in this th

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16

Müller, Holger. "Solar process heat in the food industry : methodological analysis and design of a sustainable process heat supply system in a brewery and a dairy." Thesis, De Montfort University, 2016. http://hdl.handle.net/2086/12489.

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The food industry is a large consumer of industrial energy. A very large portion of this energy is needed in the form of thermal energy at medium to low temperatures. Fossil fuels remain the dominant sources of this energy. This combination provides various possibilities to reduce energy consumption and CO2 emissions with heat recovery, but also with the integration of solar process heat. Energy efficiency must provide the context, or background, of such considerations, and is therefore a very important aspect of them. It is a complex task to design an efficient heat supply with a variety of e

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17

Bryson, Matthew John, and mbryson@bigpond net au. "The conversion of low grade heat into electricity using the Thermosyphon Rankine Engine and Trilateral Flash Cycle." RMIT University. Aerospace, Mechanical and Manufacturing Engineering, 2007. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20080130.162927.

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Low grade heat (LGH) sources, here defined as below 80ºC, are one group of abundant energy sources that are under-utilised in the production of electricity. Industrial waste heat provides a convenient source of concentrated LGH, while solar ponds and geothermal resources are examples of sustainable sources of this energy. For a number of years RMIT has had two ongoing, parallel heat engine research projects aimed at the conversion of LGH into electricity. The Thermosyphon Rankine Engine (TSR) is a heat engine that uses water under considerable vacuum. The other research stream uses a hydro

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18

Ayou, Dereje Sendeku. "Combined absorption power and refrigeration systems driven by low and mid-grade heat sources." Doctoral thesis, Universitat Rovira i Virgili, 2014. http://hdl.handle.net/10803/306436.

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Hi ha una gran abundància de fonts de calor de baixa i mitja temperatura (<300 ° C), com pot ser la solar tèrmica, geotèrmica o calor residual de diversos processos tèrmics. Els principals serveis energètics com l'aire condicionat, la refrigeració o l'electricitat es generen en general per separat mitjançant diverses tecnologies de conversió d'energia independents. La majoria dels usuaris finals necessiten almenys més d'un servei energètic: un exemple típic d'això ho constitueix el servei energètic a edificis. La producció combinada d'electricitat (descentralitzada) i de fred mitjançant sistem

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19

Law, Richard. "A knowledge-based system for low-grade waste heat recovery in the process industries." Thesis, University of Newcastle upon Tyne, 2014. http://hdl.handle.net/10443/2541.

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The ever-increasing price of energy, combined with increasingly stringent legislation to reduce greenhouse gas emissions, is driving the UK process industries toward increasing energy efficiency. Significant gains can be made in this sector, as up to 11.4TWh per annum (4% of total energy use) of the UK process industries’ energy consumption is lost as recoverable waste heat. Substantial recovery of this waste heat would have economic benefits of the order of £100s of million/year, and environmental benefits of the order of 100s of thousands of tonnes of carbon dioxide equivalent per year. This

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20

Yuan, Ziwen. "Multifunctional membrane distillation for hypersaline brine treatment, low-grade heat harvesting and lithium recovery." Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/24775.

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Membrane distillation (MD), a thermally driven technology capable of desalinating hypersaline brine, has become increasingly attractive. However, the widespread industrial application of MD has been hindered by its low energy utilization efficiency. Adding new functions to MD by integrating other emerging processes can improve MD's energy utilization efficiency. This thesis investigated two derivations of MD: pressure-retarded membrane distillation (PRMD) and thermo-osmosis coupled thermally regenerative electrochemical cycle (TO-TREC). PRMD has the potential to recover the low-grade heat in

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21

Worall, Mark. "An investigation of a jet-pump thermal (ice) storage system powered by low-grade heat." Thesis, University of Nottingham, 2001. http://eprints.nottingham.ac.uk/11111/.

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This thesis investigates a novel combination of a jet-pump refrigeration cycle and a thermal (ice) storage (TIS) system that could substantially reduce the electrical energy requirements attributable to comfort cooling.Two methods of TIS were identified; spray ice TIS would use evaporative freezing to store ice on a vertical surface,and encapsulated ice TIS would freeze a bed of encapsulated elements by sublimation freezing.Thestudy also investigates jet-pump refrigeration at partload and a convergent-divergent design manufactured from a thermoset plastic to make recommendations for performanc

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22

Ajimotokan, Habeeb A. "A study of trilateral flash cycles for low-grade waste heat recovery-to-power generation." Thesis, Cranfield University, 2014. http://dspace.lib.cranfield.ac.uk/handle/1826/9202.

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There has been renewed significance for innovative energy conversion technologies, particularly the heat recovery-to-power technologies for sustainable power generation from renewable energies and waste heat. This is due to the increasing concern over high demand for electricity, energy shortage, global warming and thermal pollution. Among the innovative heat recovery-to- power technologies, the proposed trilateral flash cycle (TFC) is a promising option, which presents a great potential for development. Unlike the Rankine cycles, the TFC starts the working fluid expansion from the saturated l

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23

Charalambous, Constantinos. "An investigation of an adsorption cogeneration system for power and cooling using low grade heat." Thesis, University of Newcastle upon Tyne, 2015. http://hdl.handle.net/10443/2891.

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Cogeneration is a hot topic in the efforts to reduce dependence on fossil fuel usage and to reduce greenhouse gas emissions by replacing the primary energy source with a low-grade heat source. Cogeneration simultaneously produces power and cooling using a low-grade heat source (e.g. solar energy, geothermal energy or waste heat), which ideally provides a renewable carbon-free solution for implementation in domestic, industrial as well as isolated areas. This research thesis describes for the first time the development and construction of the Low Heat cogeneration chemisorption system, explores

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24

Ottaviano, Saverio <1988&gt. "Test bench development, experimental analysis and modelling of micro-organic Rankine cycle for low-grade heat recovery." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amsdottorato.unibo.it/9784/1/saverio_ottaviano_PhD_thesis_.pdf.

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This thesis presents the detailed experimental and numerical analysis conducted on a prototype of micro-scale organic Rankine cycle (ORC) power system. The system is conceived for stationary co-generative applications in the residential sector, since it is characterized by a power output in the kW-scale. Suitable heat sources are low-enthalpy geothermal energy, biomass combustion, solar thermal collectors or low-temperature waste heat recovery. The system is driven by a reciprocating piston expander prototype, and uses HFC-134a as working fluid, hence it is suitable for temperature of heat sou

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25

Lindqvist, Jakob, and Niklas Faber. "Performance evaluation in post integrated organic Rankine cycle systems : A study on operational systems utilizing low grade heat." Thesis, Linköpings universitet, Mekanisk värmeteori och strömningslära, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-150371.

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Organic Rankine cycles can be integrated with district heating systems and in applications of biogas digestion. Evaluating the performance of the installations by Againity AB in Ronneby and Norrköping, Sweden, is a unique opportunity which can support the establishment of ORC technology in the waste heat recovery market, unveiling its feasibilities and limitations. Operational data gathered from October 2017 until April 2018, provides this thesis with information about the ORC-systems. A method using Coolprop and Matlab has been used to detect steady-state series in the Ronneby installation us

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26

Yang, Chen. "Novel cycles using carbon dioxide as working fluid : new ways to utilize energy from low-grade heat sources." Licentiate thesis, KTH, Energy Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4055.

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<p>This licentiate thesis proposes and analyzes three carbon dioxide novel cycles, namely: the carbon dioxide transcritical power cycle, the carbon dioxide Brayton cycle and the carbon dioxide cooling and power combined cycle. Due to the different characteristics of each cycle, the three cycles are suitable for different applications. The CO<sub>2</sub> transcritical power cycle is suitable for harvesting energy from low-grade heat sources, near which a low temperature heat sink is accessible. The CO<sub>2 </sub>Brayton cycle is suitable for harvesting the energy from relatively high-grade hea

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27

Chen, Yang. "Novel cycles using carbon dioxide as working fluid : new ways to utilize energy from low-grade heat sources." Licentiate thesis, Stockholm, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4055.

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28

Vidhi, Rachana. "Organic Fluids and Passive Cooling in a Supercritical Rankine Cycle for Power Generation from Low Grade Heat Sources." Scholar Commons, 2014. https://scholarcommons.usf.edu/etd/5322.

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Low grade heat sources have a large amount of thermal energy content. Due to low temperature, the conventional power generation technologies result in lower efficiency and hence cannot be used. In order to efficiently generate power, alternate methods need to be used. In this study, a supercritical organic Rankine cycle was used for heat source temperatures varying from 125°C to 200°C. Organic refrigerants with zero ozone depletion potential and their mixtures were selected as working fluid for this study while the cooling water temperature was changed from 10-25°C. Operating pressure of the c

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29

Schmidt, Joel Edward. "The Use of Ammonium Carbamate as a High Specific Thermal Energy Density Material for Thermal Management of Low Grade Heat." University of Dayton / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1310666985.

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30

Landelle, Arnaud. "Experimental and numerical study of transcritical Organic Rankine Cycles for low-grade heat conversion into electricity from various sources." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI090/document.

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Le Cycle Organique de Rankine (abrégé ORC de l’anglais Organic Rankine Cycle) est une technologie permettant la conversion de chaleur basse température en électricité. L’ORC transcritique a été identifié comme une solution prometteuse pour la valorisation de la chaleur fatale. Cependant, peu d’installations expérimentales ont permis de confirmer ces performances. Ce travail de thèse présente le fonctionnement et l’optimisation d’ORC sous-critique et transcritique pour la conversion de chaleur basse température en électricité à partir de différentes sources. Premièrement, les contextes thermody

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31

Scott, Grant. "Microwave pretreatment of a low grade copper ore to enhance milling performance and liberation." Thesis, Link to the online version, 2006. http://hdl.handle.net/10019/123.

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32

Peris, Pérez Bernardo. "Thermo-economic assessment of small-scale organic Rankine cycle for low-grade industrial waste heat recovery based on an experimental application." Doctoral thesis, Universitat Jaume I, 2017. http://hdl.handle.net/10803/456991.

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This thesis focuses on the use of small-scale Organic Rankine Cycles (ORC) to produce electricity from low-grade waste heat recovery of industrial processes. In particular, a thermo-economic (combination of thermodynamic and economic) optimization is conducted to achieve more cost-effective systems and, thus, to contribute to the ORC adoption in practical applications. As a novelty, this investigation is based on an experimental application case, which allows developing a comprehensive model of the system and its subsequent validation from actual data. Thereby, more realistic results are reach

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33

Green, Jeffrey Andrew. "IMPROVING THE ENERGY EFFICIENCY OF A MID-SIZE POWER PLANT BY REDUCTION IN AUXILIARY POWER AND IMPROVED HEAT TRANSFER." OpenSIUC, 2014. https://opensiuc.lib.siu.edu/theses/1502.

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This study incorporates the potential use of Variable Frequency Drives on various motors as well as areas of improved heat transfer in an older, mid-sized coal fired power plant. In power plants, fluid flow rates are often controlled using dampers or valves while the motors that power the pumps stay at full speed resulting in a significant amount of wasted electrical power; energy is also lost due to poor heat recovery prior to gases leaving the system. By examining pump usage as well as additional heat available for recovery, potential energy savings will be determined. Preliminary resul

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34

Li, Liang. "Experimental and theoretical investigation of CO2 trans-critical power cycles and R245fa organic Rankine cycles for low-grade heat to power energy conversion." Thesis, Brunel University, 2017. http://bura.brunel.ac.uk/handle/2438/14766.

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Globally, there are vast amounts of low-grade heat sources from industrial waste and renewables that can be converted into electricity through advanced thermodynamic power cycles and appropriate working fluids. In this thesis, experimental research was conducted to investigate the performance of a small-scale Organic Rankine Cycle (ORC) system under different operating conditions. The experimental setup consisted of typical ORC system components, such as a turboexpander with a high speed generator, a scroll expander, a finned-tube condenser, an ORC pump, a plate evaporator and a shell and tube

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Grove, Elmi. "Feasibility study on the implementation of a boiling condenser in a South African fossil fuel power plant." Diss., University of Pretoria, 2016. http://hdl.handle.net/2263/61293.

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The South African electricity mix is highly dependent on subcritical coal-fired power stations. The average thermal efficiency of these power plants is low. Traditional methods to increase the thermal efficiency of the cycle have been widely studied and implemented. However, utilising the waste heat at the condenser, which accounts for the biggest heat loss in the cycle, presents a large potential to increase the thermal efficiency of the cycle. Several methods can be implemented for the recovery and utilisation of low-grade waste heat. This theoretical study focuses on replacing the tra

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36

Borgogno, Remy. "Procédé thermo-hydraulique solaire appliqué à la trigénération dans le secteur résidentiel." Thesis, Perpignan, 2017. http://www.theses.fr/2017PERP0025/document.

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Un nouveau procédé de trigénération thermo-hydraulique fonctionnant à partir d'énergie thermique basse température (80 à 110 °C) a été étudié pour assurer les différents besoins du secteur résidentiel. Le terme "thermo-hydraulique" se réfère à l'utilisation d'un liquide incompressible qui permet de transférer le travail hydrauliquement entre différents composants ou sous-systèmes, permettant d'améliorer l'efficacité de la chaine de conversion énergétique. Un modèle quasi-statique a été développé pour évaluer les performances énergétiques des différentes variantes du procédé. Ces calculs ont pe

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37

Hansen, Per. "Potentiell koppling mellan elektrolys och landbaseradfiskodling : En analys av behov och tillgång på syrgas och värme." Thesis, Högskolan i Gävle, Miljövetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-36512.

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Det kommer ske en stor utbyggnad av elektrolys för produktion av vätgas i Sverigeoch övriga världen. För att sänka produktionskostnaden och därmed göra vätgasenbilligare analyserar denna rapport vilket behov av syrgas och värme som en landbaserad fiskodling har, samt hur mycket syrgas och värme fiskodlingen skulle behövaköpa från en elektrolysör. Analysen visar att de arter som används i studien - tilapia(Oreochromis, Oreochromis,. Alcolapia), regnbåge (Oncorhynchus mykiss) och lax(Salmo salar) - i en odling som producerar 40 ton fisk om året skulle förbruka cirka1,16 procent av syrgasen och c

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38

Al-Anfaji, Ahmed Suaal Bashar. "The optimization of combined power-power generation cycles." Thesis, University of Hertfordshire, 2015. http://hdl.handle.net/2299/15485.

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An investigation into the performance of several combined gas-steam power generating plants’ cycles was undertaken at the School of Engineering and Technology at the University of Hertfordshire and it is predominantly analytical in nature. The investigation covered in principle the aspect of the fundamentals and the performance parameters of the following cycles: gas turbine, steam turbine, ammonia-water, partial oxidation and the absorption chiller. Complete thermal analysis of the individual cycles was undertaken initially. Subsequently, these were linked to generate a comprehensive computer

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Charalambous, Charithea. "Temperature swing adsorption process for carbon dioxide capture, purification and compression directly from atmospheric air." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/33311.

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Many reports, scientific papers, patents, and scientific news investigate the feasibility and affordability of direct carbon dioxide capture from the atmospheric air (DAC). Since carbon dioxide (CO2) is extremely diluted in the atmosphere, large volumes of air have to be handled to capture comparable amounts of CO2. Therefore, both the energy consumption and the plant size are expected to be 'prohibitive'. On the other hand, some analyses have shown that DAC is feasible and can become affordable with essential research and development. DAC has been regarded as an optional bridging or a transit

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40

Cederblad, Lena. "Aspects on Head and neck Cancer with special reference to Salivary Gland Tumours and Single Nucleotide Polymorphism." Doctoral thesis, Uppsala universitet, Institutionen för immunologi, genetik och patologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-332192.

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A thesis on Head and neck cancer focusing on dose planning, salivary gland carcinoma and Single nucleotide polymorphism. For dose planning PET/CT (Positron emissions tomography/computed tomography) with tracer gave more precise information in comparison dose planning with CT. More primary tumours and metastases were found with the acetate tracer than with glucose tracer. Acetate PET/CT also showed larger volume of tumours attributed to lipid metabolism. In a retrospective study salivary gland cancer 5-year overall survival (OS) was 53 %. Salivary gland carcinoma consists of many histopathologi

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Савлук, Сергій Валерійович, Сергей Валерьевич Савлук та S. V. Savluk. "Обґрунтування параметрів забезпечення синхронізації двухвальних інерційних віброзбуджувачів". Thesis, Видавництво НГУ, 2012. http://ir.nmu.org.ua/handle/123456789/183.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.02.09 – динаміка і міцність машин. Державний вищий навчальний заклад «Національний гірничий університет» МОНмолодьспорту України, Дніпропетровськ, 2012.<br>Диссертация на соискание ученой степени кандидата технических наук по специальности 05.02.09 – динамика и прочность машин. Государственное высшее учебное заведение «Национальный горный университет» МОНмолодежиспорта Украины, Днепропетровск, 2012.<br>A thesis for a competition for a candidate of engineering sciences degree on speciality 05.02.09 – Dynamics

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Baeza, Román Anna. "Tratamiento médico e intervencionista de los pacientes diabéticos con síndrome coronario agudo." Doctoral thesis, Universitat Jaume I, 2017. http://hdl.handle.net/10803/400870.

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La cardiopatía isquémica supone la principal causa de muerte en los países desarrollados, con una alta tasa de morbilidad, gran demanda asistencial y consumo de recursos. La diabetes mellitus tiene una alta prevalencia entre los pacientes con SCA. Esta Tesis estudia diferentes aspectos que pueden estar implicados en esta peor evolución. En primer lugar, analiza las características de los pacientes diabéticos manejados de forma conservadora e identifica determinantes del uso de una estrategia invasiva frente al manejo conservador. En segundo lugar, mide la accesibilidad al sistema sanitari

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Chiang, Jia-Juen, and 江家諄. "Optimization of Multi-Effect Evaporation Desalination System for Low Grade Sensible Heat." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/s2aegs.

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碩士<br>國立臺灣大學<br>化學工程學研究所<br>106<br>In recent years, water stress becomes more severe in southern Taiwan due to climate change and reservoir siltation. Desalination technology can mit- igate this upcoming issue and supply fresh water persistently. Multi-Effect Evaporation (MEE) system is one of thermal desalination technologies which has features of high efficiency in power consumption. A mathematical model ofMEEsystemisdevelopedtoeffectivelyutilizethesensiblelowgradewaste heat. The model is based on mass and energy balances and it is highly non- linear. Besides conventional configuration, an a

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Tobias, Benjamin C. "Biaxial fatigue behavior of commercially pure titanium Ti-50A (Grade 2) and low-alloy titanium Ti-Code 12 (Grade 12) heat exchanger materials." Thesis, 1985. http://hdl.handle.net/1957/32368.

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Material failures in heat exchangers are often closely tied to events associated with the conditions of service and operating parameters. These events can generally be attributed to adverse load application and higher than optimum operating temperatures that could lead to changes in the microstructure of the materials and fatigue failure of the component. However, fatigue failure in heat exchangers is usually associated with the presence of a biaxial stress condition. Two nonparallel forces create a two-dimensional stress field at the free surface of the structural element where the process an

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(7518488), Michael D. Ozeh. "Design And Fabrication Of A Hybrid Nanoparticle-Wick Heat Sink Structure For Thermoelectric Generators In Low-Grade Heat Utilization.pdf." Thesis, 2019.

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Waste heat recovery is a multi-billion-dollar industry with a compound annual growth rate of 8.8% assessed between 2016 to 2024 and low-grade waste heat (< 230<sup>o</sup>C ± 20<sup>o</sup>C) makes up 66% of this ubiquitous resource. Thermoelectric generators are preferred for the recovery process because they are cheap and are well suited for this temperature range. They generate power by converting thermal potential to electric potential, known as the Seebeck effect. Since they have no moving parts, they are inherently immune to mechanical failure or an intermittent need for maintenance. How

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林志宏. "The optimal design of Low-grade waste heat trasferring power using organic rankine cycle." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/29669149775765481387.

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MORADI, RAMIN. "Object-oriented modeling of micro-ORC systems for low-grade waste heat recovery applications." Doctoral thesis, 2021. http://hdl.handle.net/11573/1549644.

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Organic Rankine Cycle (ORC) systems are one of the most suitable technologies to produce electricity from low-temperature sources. A comprehensive understanding of these systems is necessary for their further deployment especially in micro scales, in which the intrinsic issues such as low isentropic efficiency and unreliability arise more severely. In this thesis, the components of a non-regenerative, micro-scale ORC unit are modeled empirically using the experimental data. The components models are used as functions in the system-level solver. The system solver uses a novel approach, in whic

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Hsu, Sung Wei, and 徐菘蔚. "Performance Analyses and Experimental Studies on Screw-Expander ORCs for Low grade Heat to Power." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/01744559166134786366.

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博士<br>國立清華大學<br>動力機械工程學系<br>103<br>To date, ORC is the most efficient and economical approach for the recovery of low-to-medium heat to power. In general, a volumetric-type screw-expander is selected as the ORC’s engine core for power capacity less than 300 kW due to its superior performance and competitive cost. This thesis theoretically and experimentally studies on the system characteristics and performance behaviors of screw-expander ORCs. Steady-state models of the ORC’s components are theoretically developed and experimentally validated. Then, the model of the ORC system is established t

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Chuang, I.-Yuan, and 莊翼遠. "Evaporation parametric optimization of sub- and supercritical organic Rankine cycle for low-grade waste heat recovery system." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/05514826373324513899.

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碩士<br>國立中央大學<br>機械工程學系<br>105<br>As industry develops, there is an increasing demand on energy. The development of energy-saving devices and renewable energy have been emerging issues around the world. Organic Rankine cycle, ORC, is a technique to generate power from low temperature heat sources. ORC is used in recycling industrial waste heat, solar energy and geothermal power generation. Waste heat below 230°C is called low-grade waste heat. Low-grade waste heat cannot be efficiently reused in process, so it is usually exhausted into the environment. In this research, we perform thermodynami

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PALOMBA, VALERIA. "Thermal energy storage systems for low-grade heat applications: Design and experimental testing of lab-scale prototypes." Doctoral thesis, 2017. http://hdl.handle.net/11570/3116364.

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The main objective of this thesis is the development of prototypes of thermal energy storages suitable for coupling with low-grade waste heat (e.g. non-concentrating solar, industrial process heat) and their experimental testing. Benefits of thermal energy storages are several, but the experience in non-sensible heat storage is still limited, especially in the design of prototypes. High temperature heat storage (T >150°C) has been the subject of a quite extensive research, but low-grade heat sources are still not fully exploited, due to the competition with water, that is available at a

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