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Dissertations / Theses on the topic 'Utilisation of energy'

Author: Grafiati

Published: 4 June 2021

Last updated: 18 February 2022

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1

Bennett, Matt. "Auditing energy utilisation in conurbations." Thesis, Cranfield University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341048.

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2

Paton, Joe Bramwell. "Energy utilisation in commercial bread baking." Thesis, University of Leeds, 2013. http://etheses.whiterose.ac.uk/4666/.

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The aim of this project was to benchmark energy utilisation of bread manufacturing and to provide methodologies and results with the aim of improving efficiency in commercial bakeries. The bread industry is an important provider of staple food products across the world. Owing to the large energy use in bread manufacturing, bakeries have come under increased scrutiny to reduce their environmental impact. The proving process exposes dough to heat and humidity in order to encourage yeast activation. Provers (responsible for 5 % of carbon emissions in bakeries) are over-engineered to the extent th

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3

Hattan, Andrew Joseph. "Energy utilisation in high yielding dairy cows." Thesis, University of Reading, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288678.

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4

Scollan, N. D. "Biochemical aspects of energy utilisation in ruminants." Thesis, University of Edinburgh, 1991. http://hdl.handle.net/1842/27354.

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The activities of acetyl-CoA hydrolase and acetyl-CoA synthetase and the influence of diet and feeding level on them were investigated in various ovine tissues and used to determine both the potential rate of substrate cycling between acetate and acetyl-CoA and the contribution of this cycle to energy expenditure in the ruminant. Two experiments, using lambs, were conducted in an attempt to further understand biochemical pathways which may influence the efficiency of utilisation of ME and explain why this is lower for fibre (sugarbeet pulp) when compared to starch (barley) based diets. The inf

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5

Parand, Foroutan. "Solar energy utilisation and evacuated tubular solar collectors." Thesis, Brunel University, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292989.

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6

Kirkland, Richard Mervyn. "Energy partitioning and utilisation in lactating dairy cows." Thesis, Queen's University Belfast, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326343.

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7

Gustafsson, Filip. "Waste heat recovery systems : Fuel energy utilisation for a marine defence platform." Thesis, Blekinge Tekniska Högskola, Institutionen för maskinteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-19681.

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This report is a thesis for BTH in collaboration with the company Saab Kockums AB. In order to meet future environmental and economical demands, a vessel must reduce its fuel consumption to have a smaller climate impact and save money. Waste heat recovery systems (WHRS) captures the thermal energy generated from a process that is not used but dumped into the environment and transfers it back to the system. Thermal energy storage (TES) is the method of storing thermal energy which allows heat to be used whenever necessary. Some applications of TES are seasonal storage, where summer heat is stor

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8

Huggett, Anthony Court. "Energy utilisation in selected industrial sectors in South Africa." Master's thesis, University of Cape Town, 1986. http://hdl.handle.net/11427/21800.

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This thesis presents tha findings of an investigation into the use of energy, between the years 1975 and 1984, in five of the major energy-intensive industries in South Africa. Energy use in all economic sectors, from 1964 to 1974, was surveyed in the report "Energy Utilisation in South Africa", published by the Department of Planning and the Environment in 1978. As this report showed the major primary industries to be the largest single users of energy in South Africa, it was decided to isolate a number of major energy-intensive industries for investigation in this study. The 1979 Census of M

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9

Curran, R. "Utilisation of the Wells turbine for wave energy conversion." Thesis, Queen's University Belfast, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318884.

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10

Beute, Nico. "Domestic utilisation of electrical grid energy in South Africa." Thesis, Potchefstroom University, 1993. http://hdl.handle.net/20.500.11838/2187.

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Thesis (PhD (Electrical Engineering))--Potchefstroom University, 1993.<br>The domestic sector is one of the largest users of nett energy in the RSA (24%, excluding energy used for transport), but it accounts for only 14% of the electrical energy used in the RSA. There is a very strong correlation between the time of the peak of the load for the domestic sector and the time of the peak of the national load. The domestic load is the largest contributor to the peak of the national load. This makes the domestic load more important than is generally realised. Only limited research has been d

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11

Elsässer, Thomas. "PERSPECTIVE METHODS OF SEWAGE SLUDGE UTILISATION FOR ENERGY PRODUCTION." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-233941.

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Tato práce o energetickém využití čistírenských kalů obsahuje popis vlastností kalu (hustota, měrná tepelná kapacita a dynamická viskozita). Stěžejní kapitoly jsou věnovány desintegraci kalu pro zvýšení obsahu sušiny po odvodnění a experimentálnímu zkoumání tvorby emisí při spalování kalu, kde byl posuzován vliv přídavku alkálie. Spalování vysušeného kalu proběhlo ve fluidní vrstvě, byla zkoumána produkce škodlivin a distribuce těžkých kovů. Druhá ucelená část práce je věnována termochemické desintegraci stabilizovaného kalu, přičemž byl experimentálně vyhodnocován vliv na obsah vody v odvodně

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12

Williams, Jonathan Mark. "Energy utilisation and combined heat & power sizing in the health service." Thesis, Cardiff University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273836.

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13

Prasad, Umesh. "Energy utilisation in comminution and its application to rock blasting." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=26412.

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Since blasting is a comminution process, the feasibility of establishing a correlation between the Bond rod mill work index (kWh/t) and some easily measurable physico-mechanical properties relevant to blasting was investigated. Further, the concept of operating blast work index and its potential applications were explored. Four different rock types and a well documented case study of two blasts were selected for this study.<br>The work index is found to be uncorrelated with the density and unconfined compressive strength, slightly related with tensile strength, and well correlated with dynamic

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14

Wahlund, Bertil. "Rational bioenergy utilisation in energy systems and impacts on CO2emissions." Doctoral thesis, KTH, Chemical Engineering and Technology, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3490.

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<p>The increased concentration of greenhouse gases in theatmosphere, in particular CO<sub>2</sub>, is changing the Earths climate. Accordingto the Kyoto protocol, where the international community agreedon binding emission targets, developed countries are committedto reduce their greenhouse gas emissions. The increased use ofbiomass in energy systems is an important strategy to reduce CO<sub>2</sub>emissions. The purpose of this thesis has been toanalyse the opportunities for Sweden to further reduce CO<sub>2</sub>emissions in the energy system, by rationallyutilising woody biomass energy. Th

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15

Bawakyillenuo, Simon. "Rural electrification in Ghana : issues of photovoltaic energy technology utilisation." Thesis, University of Hull, 2007. http://hydra.hull.ac.uk/resources/hull:579.

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Energy plays a pivotal role in human development. Not only is it sine qua non for national economic development, but it also provides services that enhance social development including, health and sanitation, education, potable water, cooking. In spite of this, at present, there are about two billion people without access to modern sources of energy, most of them in the rural areas of the developing world. Consequentially, the social and economic development of these two billion people hangs in the balance. In recent times, however, considerable advocacy has taken place in the academic and pol

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16

Larsson, Sylvia. "Modelling of the potential for energy crop utilisation in northern Sweden /." Umeå : Unit of Biomass Technology and Chemistry, Swedish Univ. of Agricultural Sciences, 2003. http://epsilon.slu.se/9066018.pdf.

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17

Aneke, Mathew. "Optimising thermal energy recovery, utilisation and management in the process industries." Thesis, Northumbria University, 2012. http://nrl.northumbria.ac.uk/10353/.

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The persistent increase in the price of energy, the clamour to preserve our environment from the harmful effects of the anthropogenic release of greenhouse gases from the combustion of fossil fuels and the need to conserve these rapidly depleting fuels has resulted in the need for the deployment of industry best practices in energy conservation through energy efficiency improvement processes like the waste heat recovery technique. In 2006, it was estimated that approximately 20.66% of energy in the UK is consumed by industry as end-user, with the process industries (chemical industries, metal

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18

Kong, Liang. "Bismuth oxybromide-based photocatalysts for solar energy utilisation and environmental remediation." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:c95ee3cc-b276-4c69-8b3f-eb60cc64e1c0.

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This thesis reports the investigation of Bismuth oxybromide (BiOBr) semiconductor material as an efficient photocatalyst for the sunlight harvesting as well as environmental cleanup. I have utilised different synthetic methodologies to obtain BiOBr and its derivatives, such as co-precipitation, ultrasonification, and photo-deposition; and have studied their structural and optical properties by X-ray diffraction and surface analysis techniques. I report the synthesis and characterisation of two new p-n heterojunction systems, AgBr-BiOBr and BiOBr-ZnFe<sub>2</sub>O<sub>4</sub>, and have performe

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19

Siqueiros, Valencia Eric Javier. "Utilisation of heat and organic wastes for energy recovery in the industry." Thesis, University of Newcastle upon Tyne, 2017. http://hdl.handle.net/10443/3712.

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Food and drink processing industries are extremely large consumers of thermal energy as well as bio waste producer. There are huge opportunities to utilise the bio wastes for energy generation. In this project two cases were studied. Fermented grains and hops are used for the beer production and at the end the used materials are disposed with the yeast as organic wastes, in a similar way rice spirit is produced from a mixture of grains which are discarded at the end as spent grains. The feasibility of using the waste individually or in a mixture as feed for Anaerobic Digestion (AD) was evaluat

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20

Court, Craig A. "Improving the energy efficiency of microprocessor cores through accurate resource utilisation prediction." Thesis, Imperial College London, 2012. http://hdl.handle.net/10044/1/9785.

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CMOS technology scaling improves the speed and functionality of microprocessors by reducing the size of transistors. Static power dissipation also increases as a result of scaling however, and has been identified as a limiting factor in technology scaling. As current technology approaches that limit, techniques are required both at the technology-level and in the architecture design to reduce sub-threshold leakage, which accounts for the majority of static power dissipation. This thesis presents an approach to predict the idle periods of execution units at runtime and power-gate them during th

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21

Xhali, Rodney Mbulelo. "Utilisation of natural gas as a public transport fuel in South Africa." Master's thesis, University of Cape Town, 2002. http://hdl.handle.net/11427/5280.

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22

Päivärinne, Sofia. "Utilisation of Excess Heat Towards a Circular Economy : Implications of interorganisational collaborations and strategic planning." Doctoral thesis, Linköpings universitet, Industriell miljöteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-143193.

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In order to significantly lower the environmental impact from human activities, numerous efforts and approaches related to the transformation of human activities have developed during the last decades. Examples of such efforts are policies and strategies at different levels, some with a top-down approach focusing on extensive institutional changes, and some with a bottom-up approach focusing on industrial actors and industry-led activities. One essential aspect of these efforts concerns the energy used producing the products and services provided within our society. This includes, for example,

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23

Hrishikesh, Joshi. "Characterisation and utilisation of residue fromproduction of biodiesel as energy source in Brazil." Thesis, KTH, Skolan för kemivetenskap (CHE), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-156220.

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In the present study a thorough characterisation of biomass residue obtained from bio diesel production is done. The experiments are performed in the State University of Campinas in Sao Paulo, Brazil. It also investigates the feasibility to carry out thermo chemical energy conversion processes like pyrolysis and gasification on the biomass residues. The residue obtained after oil extraction from the seeds of Jatropha curcas and glycerol – a by product of bio diesel production process are the samples characterised. The samples are subjected to proximate analysis, calorimetry and TGA- thermo gra

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24

Andersson, Sebastian. "Centralised Distribution Grid Energy Storage Systems : Placement and Utilisation for Grid Expansion Deferment." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-149074.

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Following an ongoing change towards an increasingly renewable power generation system Swedish grid operators are facing several challenges in coming years. As authorities plan for the decommissioning of nuclear power an increased reliance on de-centralised energy sources such as photo-voltaic distributed generation (PVDG) is expected. A technology observed in some cases to accompany local power quality issues severe enough to impose grid expansion measures from distribution system operators (DSOs). Considering a combination of an indicative utilisation inefficiency of classical grid expansion

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25

Mohamed, A. M. A. "Investigation into the feasibility of the utilisation of renewable energy resources in Libya." Thesis, Nottingham Trent University, 2016. http://irep.ntu.ac.uk/id/eprint/29037/.

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Renewable energy in Libya, in particular solar and wind energy, can partly cover current local energy demands. It can also, through connections to the Middle East, Africa and Europe, provide neighbouring countries with electricity. Additionally, with the increase in energy demand around the world, and the international effort to reduce carbon emissions from fossil fuels, there has been a drive in many oil-rich countries to diversify their energy portfolios and resources. Libya is currently interested in utilising its renewable energy resources in order to reduce the financial and energy depend

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26

Green, Joanta Hermion. "The utilisation, dissemination and commercialisation of renewable energy systems in Pacific Rim countries." Thesis, University of Edinburgh, 1991. http://hdl.handle.net/1842/14942.

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The main objective of this study is to survey the market prospects of non-conventional power-generating and transforming equipment in the Pacific Rim, a region where most of the newly industrialised and oil producing countries are found. The Asia and Pacific region is pioneering the application of, and trade in, non-conventional energy equipment. Partly because they have been at the forefront of developing both the technology and the markets for the products under review, and partly because of their potential as producers, users, traders, the following countries have been selected for study: I

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27

Hein, Philipp Sebastian. "On the efficient and sustainable utilisation of shallow geothermal energy by using borehole heat exchangers." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-232226.

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In the context of energy transition, geothermics play an important role for the heating and cooling supply of both residential and commercial buildings. Thereby, the increasingly and intensive utilisation of shallow geothermal resources bears the risk of over-exploitation and thus poses a future challenge to ensure the sustainability and safety of such systems. Particularly, the well-established technology of borehole heat exchanger-coupled ground source heat pumps is applied for the thermal exploitation of the shallow subsurface. Due to the complexity of the involved physical processes, numer

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28

Courchelle, Inès de. "Vers une meilleure utilisation des énergies renouvelables : application à des bâtiments scientifiques." Thesis, Toulouse 3, 2017. http://www.theses.fr/2017TOU30196/document.

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Les travaux de cette thèse portent sur l'optimisation des flux énergétiques et informatiques dans un réseau intelligent ayant pour but d'alimenter un centre de calcul via des énergies renouvelables. Dans cette thèse sont traités les problèmes liés à la mise en commun des informations de types énergétique et informatique dans une contrainte de réactivité forte à travers la création d'une architecture pour un réseau intelligent. La modélisation d'un tel réseau doit permettre la prise de décision de manière dynamique et autonome. L'objectif de cette modélisation, via un réseau intelligent, est l'

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Al-Harthi, Mohammed A. "Effects of high ambient temperature on energy expenditure, utilisation and partition in the domestic fowl." Thesis, University of Edinburgh, 1997. http://hdl.handle.net/1842/11054.

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1. High temperature decreased food intake, growth rate, energy retention as protein and water retention but had no effect on energy retention as fat and little effect on total energy retention. 2. High temperature did not affect the proportion of apparent metabolisable energy retained as protein or the efficiency of energy retention from apparent metabolisable energy. However, it increased the proportion of apparent metabolisable energy retained as fat. The latter effect was attributable to the reduced energy requirement for thermoregulation. 3. Offering the birds a choice between a "high-prot

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30

Sudhakaran, Sujith. "Impact of Renewable Energy Installations and Utilisation of Smart Energy Management Systems on low-voltage networks- a study case at Östergarnslandet, Gotland." Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-396208.

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This thesis carries out an analysis of PV panel installations in the region of Östergarnslandet, situated in the Swedish island of Gotland. A low-voltage grid of 0.4 kV in the region is examined with the help of software Open DSS. This is done with the data provided by the distribution grid owner, Gotlands Elnät AB (GEAB). The potential impacts created by the PV installations in terms of exceeding currents, voltages and harmonics are assessed and thereby the hosting capacity of Solar PV in the houses and on the whole grid is studied. Moreover, a theoretical review of the Smart Energy Managem

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31

Teetz, Heiko Walter. "Technical and economic evaluation of the utilisation of wind energy at the SANAE IV base in Antarctica." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/53081.

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Thesis (MScEng)--University of Stellenbosch, 2002.<br>ENGLISH ABSTRACT: The cost of powering Antarctic research stations by conventional diesel electric generator systems is high (Steel, 1993). In order to reduce these costs and airborne pollution due to the combustion of fossil fuels, an investigation into renewable energy sources has been conducted, with the focus on wind turbine energy generation. The aim was to see whether a wind turbine is feasible, both technically and economically, for partial energy production at the SANAE IV base. The existing diesel electrical generators will s

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Olivier, Jurgen Richter. "Technical and economic evaluation of the utilisation of solar energy at South Africa's Sanae IV Base in Antarctica." Thesis, Stellenbosch : University of Stellenbosch, 2005. http://hdl.handle.net/10019.1/1910.

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Thesis (MScEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 2005.<br>There are numerous challenges that have to be overcome in order to generate the electrical and thermal energy required to power Antarctic research stations in a technically, economically and environmentally suitable manner. Consequently the costs associated with generating energy at these latitudes are high, and ways are constantly being sought to improve energy generation methods and protect the pristine environment. These endeavours are strongly encouraged by the Antarctic Treaty. This thesis

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33

Jiao, Haopeng. "Measurements of methane emissions and energy and nitrogen utilisation for quantifying the carbon footprint of young Holstein cattle." Thesis, University of Ulster, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.601201.

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The desire to develop national greenhouse gas (OHO) emission inventories and mitigation strategies to reduce carbon footprint of cattle production systems, has prompted interest to fill the knowledge gap of OHO emission from young cattle in the UK. The current UK government funded study was undertaken over a two-year period to evaluate the effects of gender (steers vs. heifers) of growing Holstein cattle (6 to 22 months of age) on enteric methane emissions and energy and nitrogen utilisation and then to use these data to develop prediction models for quantification of carbon footprint of the d

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34

Sjoberg, Elf Julia, and Espinosa Kristoffer Wannheden. "Carbon capture and utilisation in the steel industry : A study exploring the integration of carboncapture technology and high-temperature coelectrolysisof CO2 and H2O to produce synthetic gas." Thesis, KTH, Energiteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-226729.

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The present thesis studies the potential for introducing the technology of co-electrolysis of carbondioxide (CO2) and water (H2O) through a Solid Oxide Electrolyser Cell (SOEC) in a top gas recyclingblast furnace (TGR-BF) in a steel plant. TGR-BF, commonly presented in literature as a promisingcarbon capture and storage (CCS) pathway for the steel industry, can drastically decrease theseemissions by successively recycling up to 90 % of the top gas from a blast furnace (EU, 2014) andsequestering the CO2 from the highly carbon concentrated remaining top gas. Blast furnaces (BF)represent about 20

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Lalander, Emilia, Mårten Grabbe, and Mats Leijon. "On the velocity distribution for hydro-kinetic energy conversion from tidal currents and rivers." Uppsala universitet, Elektricitetslära, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-195499.

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Tidal currents and rivers are promising sources of renewable energy given that suitable turbines for kinetic energy conversion are developed. To be economically and technically feasible, a velocity distribution that can give a high degree of utilization (or capacity factor), while the ratio of maximum to rated velocity is low would be preferable. The rated velocity is defined as the velocity at which rated power is achieved. Despite many attempts to estimate the resource, however, reports on the possible degree of utilisation from tidal currents and rivers are scarce. In this paper the velocit

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Alnaser, Naser Waheeb. "Utilisation of solar and wind energy in buildings in the Kingdom of Bahrain : a step towards sustainable building construction." Thesis, University of Reading, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.520118.

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The thesis aims to introduce and accelerate the construction of building integrated photovoltaic (BIPV) or building integrated wind turbines (BIWT); considered as part of sustainable buildings. These types of buildings are important in reducing CO2 emission in Bahrain as building and construction sector is responsible for nearly 40 to 50 % of total energy use in Bahrain. Major commercial and residential building construction in Bahrain has been surveyed, making it a rich database for future make-over to BIPV or BIWT. Among these projects, there are only two sustainable building projects in Bah

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Shah, Sadiq Ali. "Analysis of solar energy production, utilisation and management for facilitating sustainable development in and around the deserts of Pakistan." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/analysis-of-solar-energy-production-utilisation-and-management-for-facilitating-sustainable-development-in-and-around-the-deserts-of-pakistan(9d3b9081-1739-4306-8f70-1eedefed5f61).html.

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The problems of lack of potable water, food and electrical power in and around the desert environment are analysed and their solutions based on the utilisation of indigenous renewable energy resources are evaluated in the current research. Self-contained, decentralised solar energy powered processes are devised in the research results as means to attain the objectives of supplying electrical power, potable water and food to the communities living in the deserts in environmentally sustainable manner. Needs analysis of desert community, a questionnaire survey, desert energy model utilisation sce

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38

Priyankarage, Nimal. "The effect of dietary amino acids on the efficiency of utilisation of energy in meat-type chickens and turkeys." Thesis, Harper Adams University College, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.485329.

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39

Douchet, Fabien. "Optimisation énergétique de data centers par utilisation de liquides pour le refroidissement des baies informatiques." Thesis, Lorient, 2015. http://www.theses.fr/2015LORIS386/document.

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Les data centers sont des infrastructures qui hébergent un grand nombre d’équipements informatiques. Plus de 99% de la puissance électrique consommée par les composants électroniques est transformée en chaleur. Pour assurer leur bon fonctionnement il est donc nécessaire de les refroidir. Cette opération est majoritairement réalisée par l’emploi de systèmes de climatisation à air très énergivores. De plus, la densité de puissance dissipée au sein des baies informatiques est en augmentation permanente. Nous arrivons alors aux limites de l’utilisation de l’air comme fluide caloporteur pour le ref

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40

Skjølberg, Karen. "Power System Impacts of variable renewable Energy Sources towards 2050 : With special emphasis on wind and solar utilisation and grid costs." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for elkraftteknikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-24692.

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The European Union(EU) has set an ambitious goal of reducing the Green House Gas(GHG) emissions with at least 80-95% in 2050 compared to 1990 levels. Due to the difficulties of avoiding all emissions in other sectors such as transport and agriculture the power sector should be close to 100% renewable. For the European energy system this means that the fossil fuel power has to be strongly reduced and that a vast amount of wind and solar power would have to be installed towards 2050. Due to the long life times of fossil fuel powered plants, 2050 is only one investment cycle away. It is therefore

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Laperrière, Wendy. "Évaluation des limites d'un digesteur biogaz pour une utilisation flexible dans un réseau local de production d'énergie." Thesis, Montpellier, 2017. http://www.theses.fr/2017MONTT068/document.

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Avec l’augmentation de la part des énergies renouvelables intermittentes (solaire et éolien) dans les mix énergétiques, des problèmes dans la stabilité de la fourniture d’électricité peuvent se présenter. La solution pour compenser ces fluctuations réside dans la production flexible de biogaz. Le biogaz peut en effet être stocké puis utilisé en période de demande; sa production doit donc être assurée de manière flexible, contrairement à ce qui est fait actuellement sur la majorité des digesteurs. L’objectif de la thèse était d’étudier et de déterminer les limites de digesteurs biogaz en foncti

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42

Persson, Urban. "Realise the Potential! : Cost Effective and Energy Efficient District Heating in European Urban Areas." Licentiate thesis, Högskolan i Halmstad, Energiteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-17281.

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The Member States of EU27 need to accelerate the integration of energy efficient technology solutions to reach the 20% energy efficiency target set for 2020. At current pace, projections indicate that only half of expected primary energy reductions will be reached. To meet the energy demands of growing populations and a vibrant economy, while simultaneously reducing primary energy supplies, the European continent faces a new kind of challenge never previously encountered. The identification and application of feasible, competitive, and comprehensive solutions to this problem are of highest pri

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Hayes, Deborah Nicola. "Effects of dietary protein level and source on milk production, nitrogen and energy utilisation and methane emissions of zero-grazed dairy cows." Thesis, Queen's University Belfast, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.707232.

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This thesis details a series of studies to evaluate the effects of different dietary treatments on production performance and N utilisation in lactating dairy cows, with a particular emphasis on urinary N excretion. Firstly a digestibility trial was performed to investigate the effect of concentrate crude protein (CP) content (14.1, 16.1 and 18.1% CP) and cow genotype (Holstein vs Holstein x Swedish Red) on N and energy utilisation, nutrient digestibility, methane emissions and milk production. Reducing concentrate CP content decreased urinary and milk urea N outputs, without negatively effect

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Lissner, Michael. "Utilisation des matériaux à changement de phase pour une gestion thermique optimale des modules de refroidissement moteur." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066063.

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L'intégration d'un accumulateur de chaleur dans les systèmes de refroidissement d'un véhicule permet d'optimiser la gestion thermique du groupe motopropulseur et ainsi de réduire la consommation et les émissions polluantes du véhicule. L'intérêt d'un tel accumulateur réside dans sa capacité à stocker / déstocker de l'énergie dans des matériaux à changement de phase (PCM) avec des puissances échangées en adéquation avec les besoins de l'automobile. La problématique scientifique concerne l'intensification, dans un volume restreint, des transferts thermiques dans le matériau de stockage. Le recou

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Muchmore, Suzi. "Knowledge transfer : a qualitative investigation of the UK low carbon innovation system." Thesis, Loughborough University, 2018. https://dspace.lboro.ac.uk/2134/35118.

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Innovation programmes require organisations to transfer both technology and knowledge to the diverse actors who operate within innovation eco-systems. The changing relationship between science and society has witnessed the growth of public private partnerships (PPP) to create new knowledge, while also triggering the emergence of a new role for universities as catalysts for innovation. This brings many challenges, stemming from the inherent nature of knowledge and the complex interactions involved with inter-disciplinary knowledge transfer. Concurrently, these public-funded programmes come unde

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Van, Staden Percy Alfred Jarvis. "A feasibility study to establish the preferred environmentally-friendly utilisation option in respect of waste tyre materials in South Africa." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/79337.

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Thesis (MBA)--Stellenbosch University, 2012.<br>Tyre waste from end-of-life tyres (ELTs), sometimes erroneously defined as a type of waste, in fact represents a renewable energy resource that is highly competitive as replacement fuel to coal in the form of tyre-derived fuel (TDF) or useable as rubber crumb in other products. In this research study, the main utilisation options considered were based on rubber crumbing through ambient and cryogenic processing. Pyrolysis, the so-called ‘holy grail’ of tyre technologies, rubberised asphalt products, TDF options and various other product options f

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Roffey, Darren M. "Exercise intensity, exercise training and energy metabolism in overweight and obese males." Queensland University of Technology, 2008. http://eprints.qut.edu.au/17823/.

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The primary objective of this PhD program was to investigate the impact of training at a constant-load moderate-intensity (FATmax) compared to work-matched high-intensity intervals (HIIT) on the metabolic, physiological and psychosocial health profiles of sedentary overweight and obese men. This study was unique in that it was the first time the effect of exercise intensity had been investigated to examine concurrently the components of whole-body energy metabolism and body composition as measured using gold standard techniques. Based upon the positive alterations in blood lipids, body c

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Wang, Xuechao. "Critical Transmission Sectors of Energy-Water-GHG Nexus." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-433461.

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Využití vody, spotřeba energie a emise skleníkových plynů (GHG) jsou rozhodujícími ukazateli a do značné míry souvisí s udržováním nebo dosahováním environmentální a sociální udržitelnosti. Tato práce prezentuje vyvinuté metodiky. Představuje také provedené případové studie, které prozkoumaly a identifikovaly Water-Energy-GHG Nexus (WEGN) z pohledu dodavatelského řetězce. Pro analýzu a návrh sítě WEGN jsou navrženy tři metodiky, které jsou založeny na nové aplikaci a integraci modelu vstup-výstup (IO), geografického informačního systému (GIS) a sítě dodavatelského řetězce (SCN), a zároveň řeší

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Greer, Andrew Walter. "Estimates of the nutritional cost of the development of immunity to gastrointestinal parasites in sheep." Phd thesis, Lincoln University. Agriculture and Life Sciences Division, 2005. http://theses.lincoln.ac.nz/public/adt-NZLIU20060913.203642.

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This thesis describes a series of three experiments designed to estimate the nutritional cost of the immune response to the gastrointestinal nematodes Trichostrongylus colubriformis and Teladorsagia circumcincta in sheep. For each experiment, animals were allocated hierarchically by liveweight into one of four groups that were either infected (group IF), similarly infected and concurrently immuno-suppressed with weekly intramuscular injections of 1.3mg kg liveweight (LW)-1 of methylprednisolone acetate (group ISIF), immuno-suppressed only (group IS) or remained as controls (group C). Body co

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Jay, Stephen. "Drying processess in the United Kingdom : assessment of industrial energy utilisation and efficiency of drying systems and the modelling of drying characters using neural networks." Thesis, Aston University, 1996. http://publications.aston.ac.uk/15330/.

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Drying is an important unit operation in process industry. Results have suggested that the energy used for drying has increased from 12% in 1978 to 18% of the total energy used in 1990. A literature survey of previous studies regarding overall drying energy consumption has demonstrated that there is little continuity of methods and energy trends could not be established. In the ceramics, timber and paper industrial sectors specific energy consumption and energy trends have been investigated by auditing drying equipment. Ceramic products examined have included tableware, tiles, sanitaryware, el

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