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Dissertations / Theses on the topic 'Sustainable cooling'

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1

Vorster, Jacobus Adriaan. "Sustainable cooling alternatives for buildings." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/4114.

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Thesis (MScEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 2010.<br>ENGLISH ABSTRACT: The thesis was initiated by a Consulting Engineering Company (KV3) as a research project to investigate various options in which the efficiency and energy utilisation of conventional air conditioning systems may be enhanced by using alternative and renewable energy. Initially, eight options had been identified and through a process of determining the degree of commercialisation the alternative options were reduced to three. These options, referred to as the sustainable cooling
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2

Lindmark, Susanne. "The role of absorption cooling for reaching sustainable energy systems." Licentiate thesis, Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-319.

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Pervaiz, Salman. "Investigation Cooling and Lubrication Strategies for Sustainable Machining of Titanium Alloys." Licentiate thesis, KTH, Maskin- och processteknologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-170769.

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The manufacturing sector is one of the most rapidly growing sectors in the industrialized world today. Manufacturing industry is concerned with being more competitive and profitable. Profit margins are directly related to the productivity of the company, and productivity improvements can be achieved by making manufacturing processes more efficient and sustainable. Knowledge of cutting conditions and their impact on machined surface and tool life enable productivity improvement.  These days the main emphasis is not only to increase productivity, but also to make processes cleaner and more envir
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4

Thompson, Joylon. "Sustainable cooling of underground railways through enhancement of the heat sink effect." Thesis, London South Bank University, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.434433.

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The drive for energy efficiency and the rising costs of energy have caused an increase in the demand and need for sustainable cooling solutions. Despite there being numerous examples of such cooling systems in conventional building services engineering none have been transferred into underground railway usage. This is in spite of many networks, particularly older systems having high levels of thermal discomfort. The need to exploit sustainable cooling resources is established in this thesis. A detailed literature study shows the need for the development of both a dedicated validated mathematic
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Dimitrokali, Elisavet. "Environmental performance evaluation of heating and cooling between sustainable and conventional office building." Thesis, University of Central Lancashire, 2015. http://clok.uclan.ac.uk/12705/.

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The aim of the study was to evaluate the long-term environmental performance effectiveness of heating and cooling systems between ‘sustainable’ and conventional office buildings. The key research question that this study tried to answear is, ‘To what extent do sustainable office buildings remain sustainable in the long run?’ On this basis, two hypotheses (HP) were tested:  HP1: Sustainable buildings remain sustainable in the long run.  HP2: Current indicators fulfil the role for determining long term sustainability. From the sustainability point of view, this study focused only on the enviro
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Yousefzadeh, Moslem. "Integrated sustainable energy solutions for large- and small-scale communities." Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/25876.

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Devising sustainable energy for large- and small-scale communities requires two different perspectives. While, in the former, the main challenge is the allocation of relatively abundant resources to meet the supply for generic demands, in the latter, the detailed properties of the resources and demands should be identified and matched. First, this thesis focuses on one of the challenges of energy development simulations for large-scale communities. A novel CSP performance model is proposed for whole-of-grid simulations, that despite the usual simplified models in the literature does not compro
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7

Moodley, Anand. "Development of a unified mass and heat integration framework for sustainable design an automated approach /." Diss., Pretoria : [s.n.], 2007. http://upetd.up.ac.za/thesis/available/etd-04222008-094925/.

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8

Pervaiz, Salman. "Numerical and Experimental Investigations of the Machinability of Ti6AI4V : Energy Efficiency and Sustainable Cooling/ Lubrication Strategies." Doctoral thesis, KTH, Industriell produktion, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-173594.

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Titanium alloys are widely utilized in the aerospace, biomedical,marine, petro-chemical and other demanding industries due to theirdurability, high fatigue resistance and ability to sustain elevateoperating temperature. As titanium alloys are difficult to machine, dueto which machining of these alloys ends up with higher environmentalburden. The industry is now embracing the sustainable philosophy inorder to reduce their carbon footprint. This means that the bestsustainable practices have to be used in machining of titanium alloys aswell as in an effort to reduce the carbon footprint and green
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Alabdoadaim, Mohamed Abualkasem. "A thermodynamic study of Brayton, inverse Brayton and Absorption cycles for sustainable power production and cooling." Thesis, University of Newcastle Upon Tyne, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.413037.

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10

Alobaid, Mohammad. "Determining the performance characteristics of flat plate and photovoltaic thermal collector for sustainable cooling systems integration." Thesis, University of Sheffield, 2018. http://etheses.whiterose.ac.uk/22948/.

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Improvement of the overall performance of solar cooling systems is achievable by optimising inlet conditions for the highest thermal efficiency of solar collectors such as flat plate collectors (FPC) and photovoltaic thermal collectors (PVT). This study has highlighted the recent advances in the field of solar absorption cooling systems from the point of view of the solar collector's types and has conducted an extensive review of the use of FPC and PVT for absorption cooling systems. The aim of this study is to investigate and optimise the thermal efficiency of FPC and PVT for sustainable cool
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11

O'Kelly, Matthew E. "Dynamic Simulation of a Superinsulated Residential Structure with a Hybrid Desiccant Cooling System." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1345442100.

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12

Mohan, Gowtham. "Novel Solar thermal polygeneration system for sustainable production of cooling, clean water and domestic hot water in UAE." Thesis, KTH, Kraft- och värmeteknologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-152608.

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13

Östlin, Robert. "Lämplighetsundersökning av olika system för att producera kyla : Fallstudie för en fastighet med bageri, restaurang och kontor." Thesis, Högskolan i Gävle, Energisystem och byggnadsteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-32530.

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Kyla produceras med ett antal helt skilda metoder. Denna rapport och fallstudie tar hänsyn till fyra metoder för kylning, kompressordriven-, absorptions-, fri-, och fjärrkyla. En del i problematiken är att systemen har mycket olika tekniska utformningar och krav på fastigheten, så som geografi och närhet till stora tekniska system som fjärrvärme och fjärrkyla. Kylsystemen jämfördes för att finna vilket kylsystem som var lämpligast samt vilket som hade den mest gynnsamma taxeringen för fastigheten. Kylsystemens lämplighet bedömdes framförallt efter underhållsbehov, men även storlek och ljudnivå
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14

El, Azzi Charles, and Roozbeh Izadi. "Green Room: A Giant Leap in Development of Green Datacenters." Thesis, KTH, Energiteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-91196.

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In a world that is slipping towards a global energy crisis as a result of a heavy dependence on depleting fossil-based fuels, investment in projects that promote energy efficiency will have a strong return on investment not only economically but also socially &amp; environmentally. Firms will directly save significant amounts of money on their energy bills and besides, contribute to slowing down the environmental degradation &amp; global warming by diminishing their carbon footprint. In the global contest to achieve high levels of energy efficiency, IT sector is no exception and telecommunicat
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15

Kardekar, Abhijit Dilip. "MODELING AND OPTIMIZATION OF MACHINING PERFORMANCE MEASURES IN FACE MILLING OF AUTOMOTIVE ALUMINUM ALLOY A380 UNDER DIFFERENT LUBRICATION/COOLING CONDITIONS FOR SUSTAINABLE MANUFACTURING." UKnowledge, 2005. http://uknowledge.uky.edu/gradschool_theses/373.

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The use of cutting fluids in machining process is very essential for achieving desired machining performance. Due to the strict environmental protection laws now in effect, there is a wide-scale evaluation of the use of cutting fluids in machining. Consequently, minimal quantity lubrication (MQL), which uses very small quantity of cutting fluids and still offers the same functionality as flood cooling, can be considered as an alternative solution. This thesis presents an experimental study of face milling of automotive aluminum alloy A380 under four different lubrication/cooling conditions: dr
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16

Djuric, Ilic Danica. "With district heating toward a sustainable future : System studies of district heating and cooling that interact with power, transport and industrial sectors." Doctoral thesis, Linköpings universitet, Energisystem, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-106899.

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The aim of this thesis is to identify measures which should be taken in DH systems (DHSs) in order to contribute to the development of the DHSs and other energy systems (especially transport, industrial and power sectors) toward sustainability. Four business strategies were analysed: delivering excess heat from biofuel production industry to DHSs, conversion of industrial processes to DH, integration of biofuel production in DHSs and integration of DHdriven absorption cooling technology in DHSs. Delivering excess heat from biofuel production industry to DHSs was analysed with a focus on the bi
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17

Mertens, Marriette Omaidja [Verfasser], Christoph [Akademischer Betreuer] Kuhn, and Ingo [Akademischer Betreuer] Sass. "Developing a Pathway to Sustainable Residential Cooling in West African Cities : The Case Study of Tema, Ghana / Marriette Omaidja Mertens ; Christoph Kuhn, Ingo Sass." Darmstadt : Universitäts- und Landesbibliothek, 2021. http://d-nb.info/1229087664/34.

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18

Cococcetta, Nicholas Michael. "Investigating Surface Finish, Burr Formation and Tool Wear During Sustainable Machining of 3D Printed Carbon Fiber Reinforced Polymer (CFRP) Composites." Miami University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=miami1586533608277002.

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19

Wang, Shan. "Further study of Life Cycle Assessment of a high density data center cooling system – Teliasonera’s “Green Room” concept : Identification of improvement possibilities using Life Cycle Assessment (LCA) and discussion about the effect of the choice of Life Cycle Impact Assessment (LCIA) methods on the results." Thesis, KTH, Miljöstrategisk analys, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-117983.

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The growing industry of Information and Communication Technology requires higher computing capacity of data centers. The air conditioning in data centers is a key to assure a sustainable computing environment. However, the traditional cooling systems cost large environmental footprints especially on energy consumption and greenhouse gas emissions. As a result, a green innovation of data center cooling solutions is taking place. The telecommunication company Teliasonera is developing a high density data center cooling system - the “Green Room” and has been studying the environmental performance
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Wang, Shan. "Further study of the “GreenRoom” concept – an approach to sustainable datacenter cooling solution : Identification of improvement possibilities using Life Cycle Assessment (LCA) and discussion about the effect of the choice of Life Cycle Impact Assessment (LCIA) methods on the results." Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-116474.

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The growing industry of Information and Communication Technology requires higher computing capacity of data centers/technical sites. The air conditioning in data centers is the key to assure a sustainable computing environment. However, the traditional cooling systems cost are responsible for large environmental footprints especially on energy consumption and greenhouse gas emissions. As a result, a green innovation of data center cooling solutions is taking place. The telecommunication company Teliasonera is developing a high density data center cooling system - the “Green Room” and has been
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21

Björk, Magnus. "ENERGY INVESTIGATION, GÄRTUNA : On the facilities of Astra Zeneca, with suggestions of energy optimizations." Thesis, Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-29123.

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AstraZeneca is one of the largest biopharmaceutical companies in the world, and one of the facilities they have is located in Gärtuna, Södertälje. The facility itself is very big with a floor area of 560.000m2 and has a complex energy system. Caverion holds a facility management contract at AstraZenca, hence operates some of the energy system. The energy investigation of this thesis is part of the work of Caverion to ensure a sustainable energy system in Gärtuna. The energy investigation will include mapping of the energy distribution, seeking for potential of improvements and carry out sugges
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22

Horák, Jakub. "Moderní bioplynová stanice jako součást „Smart Regions“." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232158.

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This thesis deals with the design of computational model of a biogas plant and its use in the concept of intelligent region with focusing on district heating and cooling network. The introduction contains review of technology used in the biogas plant. This review covers the description of modern biogas plants and determination of the energy and technology parameters for computational model of biogas plant. The next part of thesis describes analyze of the dynamics of the operation and the possibilities of using waste heat from biogas plant. The last and also the most important part is based on
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23

Honée, Caspar. "Environmental Performance of the Försäkringskassan IT Infrastructure : A Green-IT case study for the Swedish Social Insurance Agency." Thesis, Mittuniversitetet, Avdelningen för ekoteknik och hållbart byggande, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-20003.

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This Green IT case study commissioned by Försäkringskassan (FK), the Swedish National Social Insurance Agency, quantifies the environmental performance of the IT infrastructure (IT-IS) in use during 2010 in a lifecycle perspective. Adopting a system view in Green IT analysis can mitigate risks of problem shifts. IT-IS concerns the equipment that enables office automation and external web application services. The size of the FK IT-IS is in the order of 300 branch offices with 14000 pc’s, 2100 printers and a 1 MW data centre hosting 1200 servers, 5 Petabyte of central data storage and serving a
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24

Khatri, Ashutosh Mahesh. "INVESTIGATING TOOL WEAR MECHANISM AND MICROSTRUCTURALCHANGES FOR CONVENTIONAL AND SUSTAINABLE MACHINING OFTITANIUM ALLOY." Miami University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=miami1533287855502478.

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25

Srinivasan, Arvind. "Thermal Performance of Passive Radiative Cooling Strategies on Building Envelopes." Thesis, 2020. https://doi.org/10.7916/d8-se2f-q413.

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Passive radiative cooling has been extensively studied as a means to cool the exterior surfaces of buildings and reduce space cooling loads. This phenomenon is caused by thermal radiation that is continuously emitted from surfaces on Earth, and transmitted through the atmosphere to outer space (at approximately 3-4 Kelvin temperature scale). To gain a deeper understanding of how terrestrial objects can access this extraterrestrial cold reservoir, I use a theoretical framework derived from classical radiative heat transfer to investigate the radiative properties of surfaces and the atmosphere o
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"Machining of nimonic 90 using sustainable techniques and modelling for the specific cutting energy." Thesis, 2018. http://localhost:8080/iit/handle/2074/7718.

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Mertens, Marriette Omaidja. "Developing a Pathway to Sustainable Residential Cooling in West African Cities : The Case Study of Tema, Ghana." Phd thesis, 2021. https://tuprints.ulb.tu-darmstadt.de/17643/1/2_Dissertation_Marriette_Mertens.pdf.

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Air conditioning is not just a matter of individual comfort in many tropical countries but a precondition of public health, work productivity and economic growth. Residential cooling is energy-intensive, raising profound concern to exacerbate global warming and in turn the need for more residential cooling as the prevalence of air conditioners especially in Africa is expected to skyrocket in the future. This work develops a pathway to sustainable residential cooling for West African cities to address this challenge. As meaningful data are basically non-existent, electricity end use monitoring
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(11191899), Jie Ma. "A SEQUENTIAL APPROACH FOR ACHIEVING SEPARATE SENSIBLE AND LATENT COOLING." Thesis, 2021.

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<p>Current air conditioning systems generally operate with a relatively fixed moisture removal capacity, and indoor humidity conditions are usually not actively controlled in most buildings. If we focus only on sensible heat removal, an air conditioning system could operate with a fairly high evaporating temperature, and consequently a high coefficient of performance (COP). However, to provide an acceptable level of dehumidification, air conditioners typically operate with a much lower evaporating temperature (and lower COP) to ensure that the air is cooled below its dew point to achieve dehum
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IMANI, AMIR. "The reappearance of iranian vernacular architecture using natural ventilation and passive cooling strategies to improve conditions for food security and education in developing countries with hot climates." Doctoral thesis, 2019. http://hdl.handle.net/11573/1232195.

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ABSTRACT : The largest problem facing human beings today is global warming. Every day, due to heavy consumption of petroleum and nuclear products, a huge amount of electricity is used. This electricity, in turn, fuels the global industry that produces cooling and warming systems for buildings, and this worrying reality has created a lot of biological disasters by adding pollution to our environment, including the increase of greenhouse gas etc. Currently, seventy percent of developing countries are located in hot temperature climates. In addition to dealing with hot climate issues, these
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